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xref:utils.adoc#ReentrancyGuardTransient-ReentrancyGuardReentrantCall-- :xref-Pausable-whenNotPaused--: xref:utils.adoc#Pausable-whenNotPaused-- :xref-Pausable-whenPaused--: xref:utils.adoc#Pausable-whenPaused-- :xref-Pausable-constructor--: xref:utils.adoc#Pausable-constructor-- :xref-Pausable-paused--: xref:utils.adoc#Pausable-paused-- :xref-Pausable-_requireNotPaused--: xref:utils.adoc#Pausable-_requireNotPaused-- :xref-Pausable-_requirePaused--: xref:utils.adoc#Pausable-_requirePaused-- :xref-Pausable-_pause--: xref:utils.adoc#Pausable-_pause-- :xref-Pausable-_unpause--: xref:utils.adoc#Pausable-_unpause-- :xref-Pausable-Paused-address-: xref:utils.adoc#Pausable-Paused-address- :xref-Pausable-Unpaused-address-: xref:utils.adoc#Pausable-Unpaused-address- :xref-Pausable-EnforcedPause--: xref:utils.adoc#Pausable-EnforcedPause-- :xref-Pausable-ExpectedPause--: xref:utils.adoc#Pausable-ExpectedPause-- :xref-Nonces-nonces-address-: xref:utils.adoc#Nonces-nonces-address- :xref-Nonces-_useNonce-address-: xref:utils.adoc#Nonces-_useNonce-address- :xref-Nonces-_useCheckedNonce-address-uint256-: xref:utils.adoc#Nonces-_useCheckedNonce-address-uint256- :xref-Nonces-InvalidAccountNonce-address-uint256-: xref:utils.adoc#Nonces-InvalidAccountNonce-address-uint256- :Nonces: pass:normal[xref:utils.adoc#Nonces[`Nonces`]] :Nonces: pass:normal[xref:utils.adoc#Nonces[`Nonces`]] :Nonces: pass:normal[xref:utils.adoc#Nonces[`Nonces`]] :NoncesKeyed: pass:normal[xref:utils.adoc#NoncesKeyed[`NoncesKeyed`]] :xref-NoncesKeyed-nonces-address-uint192-: xref:utils.adoc#NoncesKeyed-nonces-address-uint192- :xref-NoncesKeyed-_useNonce-address-uint192-: xref:utils.adoc#NoncesKeyed-_useNonce-address-uint192- :xref-NoncesKeyed-_useCheckedNonce-address-uint256-: xref:utils.adoc#NoncesKeyed-_useCheckedNonce-address-uint256- :xref-NoncesKeyed-_useCheckedNonce-address-uint192-uint64-: xref:utils.adoc#NoncesKeyed-_useCheckedNonce-address-uint192-uint64- :xref-Nonces-nonces-address-: xref:utils.adoc#Nonces-nonces-address- :xref-Nonces-_useNonce-address-: xref:utils.adoc#Nonces-_useNonce-address- :xref-Nonces-InvalidAccountNonce-address-uint256-: xref:utils.adoc#Nonces-InvalidAccountNonce-address-uint256- :ERC165Checker: pass:normal[xref:utils.adoc#ERC165Checker[`ERC165Checker`]] :ERC165: pass:normal[xref:utils.adoc#ERC165[`ERC165`]] :xref-IERC165-supportsInterface-bytes4-: xref:utils.adoc#IERC165-supportsInterface-bytes4- :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :xref-ERC165-supportsInterface-bytes4-: xref:utils.adoc#ERC165-supportsInterface-bytes4- :IERC165-supportsInterface: pass:normal[xref:utils.adoc#IERC165-supportsInterface-bytes4-[`IERC165.supportsInterface`]] :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :xref-ERC165Checker-supportsERC165-address-: xref:utils.adoc#ERC165Checker-supportsERC165-address- :xref-ERC165Checker-supportsInterface-address-bytes4-: xref:utils.adoc#ERC165Checker-supportsInterface-address-bytes4- :xref-ERC165Checker-getSupportedInterfaces-address-bytes4---: xref:utils.adoc#ERC165Checker-getSupportedInterfaces-address-bytes4--- :xref-ERC165Checker-supportsAllInterfaces-address-bytes4---: xref:utils.adoc#ERC165Checker-supportsAllInterfaces-address-bytes4--- :xref-ERC165Checker-supportsERC165InterfaceUnchecked-address-bytes4-: xref:utils.adoc#ERC165Checker-supportsERC165InterfaceUnchecked-address-bytes4- :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :IERC165-supportsInterface: pass:normal[xref:utils.adoc#IERC165-supportsInterface-bytes4-[`IERC165.supportsInterface`]] :IERC165-supportsInterface: pass:normal[xref:utils.adoc#IERC165-supportsInterface-bytes4-[`IERC165.supportsInterface`]] :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :IERC165: pass:normal[xref:utils.adoc#IERC165[`IERC165`]] :IERC165-supportsInterface: pass:normal[xref:utils.adoc#IERC165-supportsInterface-bytes4-[`IERC165.supportsInterface`]] :xref-BitMaps-get-struct-BitMaps-BitMap-uint256-: xref:utils.adoc#BitMaps-get-struct-BitMaps-BitMap-uint256- :xref-BitMaps-setTo-struct-BitMaps-BitMap-uint256-bool-: xref:utils.adoc#BitMaps-setTo-struct-BitMaps-BitMap-uint256-bool- :xref-BitMaps-set-struct-BitMaps-BitMap-uint256-: xref:utils.adoc#BitMaps-set-struct-BitMaps-BitMap-uint256- :xref-BitMaps-unset-struct-BitMaps-BitMap-uint256-: xref:utils.adoc#BitMaps-unset-struct-BitMaps-BitMap-uint256- :xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-bytes32-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-bytes32- :xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32- :xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32- :xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToBytes32Map-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-Bytes32ToBytes32Map- :xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-Bytes32ToBytes32Map-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32- :xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32- :xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToBytes32Map-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToBytes32Map- :xref-EnumerableMap-set-struct-EnumerableMap-UintToUintMap-uint256-uint256-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-UintToUintMap-uint256-uint256- :xref-EnumerableMap-remove-struct-EnumerableMap-UintToUintMap-uint256-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-UintToUintMap-uint256- :xref-EnumerableMap-contains-struct-EnumerableMap-UintToUintMap-uint256-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-UintToUintMap-uint256- :xref-EnumerableMap-length-struct-EnumerableMap-UintToUintMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-UintToUintMap- :xref-EnumerableMap-at-struct-EnumerableMap-UintToUintMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-UintToUintMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToUintMap-uint256-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-UintToUintMap-uint256- :xref-EnumerableMap-get-struct-EnumerableMap-UintToUintMap-uint256-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-UintToUintMap-uint256- :xref-EnumerableMap-keys-struct-EnumerableMap-UintToUintMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-UintToUintMap- :xref-EnumerableMap-set-struct-EnumerableMap-UintToAddressMap-uint256-address-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-UintToAddressMap-uint256-address- :xref-EnumerableMap-remove-struct-EnumerableMap-UintToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-UintToAddressMap-uint256- :xref-EnumerableMap-contains-struct-EnumerableMap-UintToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-UintToAddressMap-uint256- :xref-EnumerableMap-length-struct-EnumerableMap-UintToAddressMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-UintToAddressMap- :xref-EnumerableMap-at-struct-EnumerableMap-UintToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-UintToAddressMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-UintToAddressMap-uint256- :xref-EnumerableMap-get-struct-EnumerableMap-UintToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-UintToAddressMap-uint256- :xref-EnumerableMap-keys-struct-EnumerableMap-UintToAddressMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-UintToAddressMap- :xref-EnumerableMap-set-struct-EnumerableMap-UintToBytes32Map-uint256-bytes32-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-UintToBytes32Map-uint256-bytes32- :xref-EnumerableMap-remove-struct-EnumerableMap-UintToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-UintToBytes32Map-uint256- :xref-EnumerableMap-contains-struct-EnumerableMap-UintToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-UintToBytes32Map-uint256- :xref-EnumerableMap-length-struct-EnumerableMap-UintToBytes32Map-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-UintToBytes32Map- :xref-EnumerableMap-at-struct-EnumerableMap-UintToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-UintToBytes32Map-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-UintToBytes32Map-uint256- :xref-EnumerableMap-get-struct-EnumerableMap-UintToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-UintToBytes32Map-uint256- :xref-EnumerableMap-keys-struct-EnumerableMap-UintToBytes32Map-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-UintToBytes32Map- :xref-EnumerableMap-set-struct-EnumerableMap-AddressToUintMap-address-uint256-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-AddressToUintMap-address-uint256- :xref-EnumerableMap-remove-struct-EnumerableMap-AddressToUintMap-address-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-AddressToUintMap-address- :xref-EnumerableMap-contains-struct-EnumerableMap-AddressToUintMap-address-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-AddressToUintMap-address- :xref-EnumerableMap-length-struct-EnumerableMap-AddressToUintMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-AddressToUintMap- :xref-EnumerableMap-at-struct-EnumerableMap-AddressToUintMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-AddressToUintMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToUintMap-address-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-AddressToUintMap-address- :xref-EnumerableMap-get-struct-EnumerableMap-AddressToUintMap-address-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-AddressToUintMap-address- :xref-EnumerableMap-keys-struct-EnumerableMap-AddressToUintMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-AddressToUintMap- :xref-EnumerableMap-set-struct-EnumerableMap-AddressToAddressMap-address-address-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-AddressToAddressMap-address-address- :xref-EnumerableMap-remove-struct-EnumerableMap-AddressToAddressMap-address-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-AddressToAddressMap-address- :xref-EnumerableMap-contains-struct-EnumerableMap-AddressToAddressMap-address-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-AddressToAddressMap-address- :xref-EnumerableMap-length-struct-EnumerableMap-AddressToAddressMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-AddressToAddressMap- :xref-EnumerableMap-at-struct-EnumerableMap-AddressToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-AddressToAddressMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToAddressMap-address-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-AddressToAddressMap-address- :xref-EnumerableMap-get-struct-EnumerableMap-AddressToAddressMap-address-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-AddressToAddressMap-address- :xref-EnumerableMap-keys-struct-EnumerableMap-AddressToAddressMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-AddressToAddressMap- :xref-EnumerableMap-set-struct-EnumerableMap-AddressToBytes32Map-address-bytes32-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-AddressToBytes32Map-address-bytes32- :xref-EnumerableMap-remove-struct-EnumerableMap-AddressToBytes32Map-address-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-AddressToBytes32Map-address- :xref-EnumerableMap-contains-struct-EnumerableMap-AddressToBytes32Map-address-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-AddressToBytes32Map-address- :xref-EnumerableMap-length-struct-EnumerableMap-AddressToBytes32Map-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-AddressToBytes32Map- :xref-EnumerableMap-at-struct-EnumerableMap-AddressToBytes32Map-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-AddressToBytes32Map-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToBytes32Map-address-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-AddressToBytes32Map-address- :xref-EnumerableMap-get-struct-EnumerableMap-AddressToBytes32Map-address-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-AddressToBytes32Map-address- :xref-EnumerableMap-keys-struct-EnumerableMap-AddressToBytes32Map-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-AddressToBytes32Map- :xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToUintMap-bytes32-uint256-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-Bytes32ToUintMap-bytes32-uint256- :xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToUintMap-bytes32-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToUintMap-bytes32- :xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToUintMap-bytes32-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToUintMap-bytes32- :xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToUintMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-Bytes32ToUintMap- :xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToUintMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-Bytes32ToUintMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToUintMap-bytes32-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToUintMap-bytes32- :xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToUintMap-bytes32-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-Bytes32ToUintMap-bytes32- :xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToUintMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToUintMap- :xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-address-: xref:utils.adoc#EnumerableMap-set-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-address- :xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-: xref:utils.adoc#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToAddressMap-bytes32- :xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-: xref:utils.adoc#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToAddressMap-bytes32- :xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToAddressMap-: xref:utils.adoc#EnumerableMap-length-struct-EnumerableMap-Bytes32ToAddressMap- :xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToAddressMap-uint256-: xref:utils.adoc#EnumerableMap-at-struct-EnumerableMap-Bytes32ToAddressMap-uint256- :xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-: xref:utils.adoc#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToAddressMap-bytes32- :xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-: xref:utils.adoc#EnumerableMap-get-struct-EnumerableMap-Bytes32ToAddressMap-bytes32- :xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToAddressMap-: xref:utils.adoc#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToAddressMap- :xref-EnumerableMap-EnumerableMapNonexistentKey-bytes32-: xref:utils.adoc#EnumerableMap-EnumerableMapNonexistentKey-bytes32- :xref-EnumerableSet-add-struct-EnumerableSet-Bytes32Set-bytes32-: xref:utils.adoc#EnumerableSet-add-struct-EnumerableSet-Bytes32Set-bytes32- :xref-EnumerableSet-remove-struct-EnumerableSet-Bytes32Set-bytes32-: xref:utils.adoc#EnumerableSet-remove-struct-EnumerableSet-Bytes32Set-bytes32- :xref-EnumerableSet-contains-struct-EnumerableSet-Bytes32Set-bytes32-: xref:utils.adoc#EnumerableSet-contains-struct-EnumerableSet-Bytes32Set-bytes32- :xref-EnumerableSet-length-struct-EnumerableSet-Bytes32Set-: xref:utils.adoc#EnumerableSet-length-struct-EnumerableSet-Bytes32Set- :xref-EnumerableSet-at-struct-EnumerableSet-Bytes32Set-uint256-: 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xref:utils.adoc#Packing-extract_28_22-bytes28-uint8- :xref-Packing-replace_28_22-bytes28-bytes22-uint8-: xref:utils.adoc#Packing-replace_28_22-bytes28-bytes22-uint8- :xref-Packing-extract_28_24-bytes28-uint8-: xref:utils.adoc#Packing-extract_28_24-bytes28-uint8- :xref-Packing-replace_28_24-bytes28-bytes24-uint8-: xref:utils.adoc#Packing-replace_28_24-bytes28-bytes24-uint8- :xref-Packing-extract_32_1-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_1-bytes32-uint8- :xref-Packing-replace_32_1-bytes32-bytes1-uint8-: xref:utils.adoc#Packing-replace_32_1-bytes32-bytes1-uint8- :xref-Packing-extract_32_2-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_2-bytes32-uint8- :xref-Packing-replace_32_2-bytes32-bytes2-uint8-: xref:utils.adoc#Packing-replace_32_2-bytes32-bytes2-uint8- :xref-Packing-extract_32_4-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_4-bytes32-uint8- :xref-Packing-replace_32_4-bytes32-bytes4-uint8-: xref:utils.adoc#Packing-replace_32_4-bytes32-bytes4-uint8- :xref-Packing-extract_32_6-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_6-bytes32-uint8- :xref-Packing-replace_32_6-bytes32-bytes6-uint8-: xref:utils.adoc#Packing-replace_32_6-bytes32-bytes6-uint8- :xref-Packing-extract_32_8-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_8-bytes32-uint8- :xref-Packing-replace_32_8-bytes32-bytes8-uint8-: xref:utils.adoc#Packing-replace_32_8-bytes32-bytes8-uint8- :xref-Packing-extract_32_10-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_10-bytes32-uint8- :xref-Packing-replace_32_10-bytes32-bytes10-uint8-: xref:utils.adoc#Packing-replace_32_10-bytes32-bytes10-uint8- :xref-Packing-extract_32_12-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_12-bytes32-uint8- :xref-Packing-replace_32_12-bytes32-bytes12-uint8-: xref:utils.adoc#Packing-replace_32_12-bytes32-bytes12-uint8- :xref-Packing-extract_32_16-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_16-bytes32-uint8- :xref-Packing-replace_32_16-bytes32-bytes16-uint8-: xref:utils.adoc#Packing-replace_32_16-bytes32-bytes16-uint8- :xref-Packing-extract_32_20-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_20-bytes32-uint8- :xref-Packing-replace_32_20-bytes32-bytes20-uint8-: xref:utils.adoc#Packing-replace_32_20-bytes32-bytes20-uint8- :xref-Packing-extract_32_22-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_22-bytes32-uint8- :xref-Packing-replace_32_22-bytes32-bytes22-uint8-: xref:utils.adoc#Packing-replace_32_22-bytes32-bytes22-uint8- :xref-Packing-extract_32_24-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_24-bytes32-uint8- :xref-Packing-replace_32_24-bytes32-bytes24-uint8-: xref:utils.adoc#Packing-replace_32_24-bytes32-bytes24-uint8- :xref-Packing-extract_32_28-bytes32-uint8-: xref:utils.adoc#Packing-extract_32_28-bytes32-uint8- :xref-Packing-replace_32_28-bytes32-bytes28-uint8-: xref:utils.adoc#Packing-replace_32_28-bytes32-bytes28-uint8- :xref-Packing-OutOfRangeAccess--: xref:utils.adoc#Packing-OutOfRangeAccess-- :xref-Panic-panic-uint256-: xref:utils.adoc#Panic-panic-uint256- :xref-Panic-GENERIC-uint256: xref:utils.adoc#Panic-GENERIC-uint256 :xref-Panic-ASSERT-uint256: xref:utils.adoc#Panic-ASSERT-uint256 :xref-Panic-UNDER_OVERFLOW-uint256: xref:utils.adoc#Panic-UNDER_OVERFLOW-uint256 :xref-Panic-DIVISION_BY_ZERO-uint256: xref:utils.adoc#Panic-DIVISION_BY_ZERO-uint256 :xref-Panic-ENUM_CONVERSION_ERROR-uint256: xref:utils.adoc#Panic-ENUM_CONVERSION_ERROR-uint256 :xref-Panic-STORAGE_ENCODING_ERROR-uint256: xref:utils.adoc#Panic-STORAGE_ENCODING_ERROR-uint256 :xref-Panic-EMPTY_ARRAY_POP-uint256: xref:utils.adoc#Panic-EMPTY_ARRAY_POP-uint256 :xref-Panic-ARRAY_OUT_OF_BOUNDS-uint256: xref:utils.adoc#Panic-ARRAY_OUT_OF_BOUNDS-uint256 :xref-Panic-RESOURCE_ERROR-uint256: xref:utils.adoc#Panic-RESOURCE_ERROR-uint256 :xref-Panic-INVALID_INTERNAL_FUNCTION-uint256: xref:utils.adoc#Panic-INVALID_INTERNAL_FUNCTION-uint256 :xref-Comparators-lt-uint256-uint256-: xref:utils.adoc#Comparators-lt-uint256-uint256- :xref-Comparators-gt-uint256-uint256-: xref:utils.adoc#Comparators-gt-uint256-uint256- = Utilities [.readme-notice] NOTE: This document is better viewed at https://docs.openzeppelin.com/contracts/api/utils Miscellaneous contracts and libraries containing utility functions you can use to improve security, work with new data types, or safely use low-level primitives. * {Math}, {SignedMath}: Implementation of various arithmetic functions. * {SafeCast}: Checked downcasting functions to avoid silent truncation. * {ECDSA}, {MessageHashUtils}: Libraries for interacting with ECDSA signatures. * {P256}: Library for verifying and recovering public keys from secp256r1 signatures. * {RSA}: Library with RSA PKCS#1 v1.5 signature verification utilities. * {SignatureChecker}: A library helper to support regular ECDSA from EOAs as well as ERC-1271 signatures for smart contracts. * {Hashes}: Commonly used hash functions. * {MerkleProof}: Functions for verifying https://en.wikipedia.org/wiki/Merkle_tree[Merkle Tree] proofs. * {EIP712}: Contract with functions to allow processing signed typed structure data according to https://eips.ethereum.org/EIPS/eip-712[EIP-712]. * {ReentrancyGuard}: A modifier that can prevent reentrancy during certain functions. * {ReentrancyGuardTransient}: Variant of {ReentrancyGuard} that uses transient storage (https://eips.ethereum.org/EIPS/eip-1153[EIP-1153]). * {Pausable}: A common emergency response mechanism that can pause functionality while a remediation is pending. * {Nonces}: Utility for tracking and verifying address nonces that only increment. * {NoncesKeyed}: Alternative to {Nonces}, that support key-ed nonces following https://eips.ethereum.org/EIPS/eip-4337#semi-abstracted-nonce-support[ERC-4337 speciciations]. * {ERC165}, {ERC165Checker}: Utilities for inspecting interfaces supported by contracts. * {BitMaps}: A simple library to manage boolean value mapped to a numerical index in an efficient way. * {EnumerableMap}: A type like Solidity's https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`], but with key-value _enumeration_: this will let you know how many entries a mapping has, and iterate over them (which is not possible with `mapping`). * {EnumerableSet}: Like {EnumerableMap}, but for https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets]. Can be used to store privileged accounts, issued IDs, etc. * {DoubleEndedQueue}: An implementation of a https://en.wikipedia.org/wiki/Double-ended_queue[double ended queue] whose values can be removed added or remove from both sides. Useful for FIFO and LIFO structures. * {CircularBuffer}: A data structure to store the last N values pushed to it. * {Checkpoints}: A data structure to store values mapped to a strictly increasing key. Can be used for storing and accessing values over time. * {Heap}: A library that implements a https://en.wikipedia.org/wiki/Binary_heap[binary heap] in storage. * {MerkleTree}: A library with https://wikipedia.org/wiki/Merkle_Tree[Merkle Tree] data structures and helper functions. * {Create2}: Wrapper around the https://blog.openzeppelin.com/getting-the-most-out-of-create2/[`CREATE2` EVM opcode] for safe use without having to deal with low-level assembly. * {Address}: Collection of functions for overloading Solidity's https://docs.soliditylang.org/en/latest/types.html#address[`address`] type. * {Arrays}: Collection of functions that operate on https://docs.soliditylang.org/en/latest/types.html#arrays[`arrays`]. * {Base64}: On-chain base64 and base64URL encoding according to https://datatracker.ietf.org/doc/html/rfc4648[RFC-4648]. * {Bytes}: Common operations on bytes objects. * {Strings}: Common operations for strings formatting. * {ShortString}: Library to encode (and decode) short strings into (or from) a single bytes32 slot for optimizing costs. Short strings are limited to 31 characters. * {SlotDerivation}: Methods for deriving storage slot from ERC-7201 namespaces as well as from constructions such as mapping and arrays. * {StorageSlot}: Methods for accessing specific storage slots formatted as common primitive types. * {TransientSlot}: Primitives for reading from and writing to transient storage (only value types are currently supported). * {Multicall}: Abstract contract with a utility to allow batching together multiple calls in a single transaction. Useful for allowing EOAs to perform multiple operations at once. * {Context}: A utility for abstracting the sender and calldata in the current execution context. * {Packing}: A library for packing and unpacking multiple values into bytes32 * {Panic}: A library to revert with https://docs.soliditylang.org/en/v0.8.20/control-structures.html#panic-via-assert-and-error-via-require[Solidity panic codes]. * {Comparators}: A library that contains comparator functions to use with with the {Heap} library. * {CAIP2}, {CAIP10}: Libraries for formatting and parsing CAIP-2 and CAIP-10 identifiers. [NOTE] ==== Because Solidity does not support generic types, {EnumerableMap} and {EnumerableSet} are specialized to a limited number of key-value types. ==== == Math :Rounding: pass:normal[xref:#Math-Rounding[`++Rounding++`]] :tryAdd: pass:normal[xref:#Math-tryAdd-uint256-uint256-[`++tryAdd++`]] :trySub: pass:normal[xref:#Math-trySub-uint256-uint256-[`++trySub++`]] :tryMul: pass:normal[xref:#Math-tryMul-uint256-uint256-[`++tryMul++`]] :tryDiv: pass:normal[xref:#Math-tryDiv-uint256-uint256-[`++tryDiv++`]] :tryMod: pass:normal[xref:#Math-tryMod-uint256-uint256-[`++tryMod++`]] :ternary: pass:normal[xref:#Math-ternary-bool-uint256-uint256-[`++ternary++`]] :max: pass:normal[xref:#Math-max-uint256-uint256-[`++max++`]] :min: pass:normal[xref:#Math-min-uint256-uint256-[`++min++`]] :average: pass:normal[xref:#Math-average-uint256-uint256-[`++average++`]] :ceilDiv: pass:normal[xref:#Math-ceilDiv-uint256-uint256-[`++ceilDiv++`]] :mulDiv: pass:normal[xref:#Math-mulDiv-uint256-uint256-uint256-[`++mulDiv++`]] :mulDiv: pass:normal[xref:#Math-mulDiv-uint256-uint256-uint256-enum-Math-Rounding-[`++mulDiv++`]] :invMod: pass:normal[xref:#Math-invMod-uint256-uint256-[`++invMod++`]] :invModPrime: pass:normal[xref:#Math-invModPrime-uint256-uint256-[`++invModPrime++`]] :modExp: pass:normal[xref:#Math-modExp-uint256-uint256-uint256-[`++modExp++`]] :tryModExp: pass:normal[xref:#Math-tryModExp-uint256-uint256-uint256-[`++tryModExp++`]] :modExp: pass:normal[xref:#Math-modExp-bytes-bytes-bytes-[`++modExp++`]] :tryModExp: pass:normal[xref:#Math-tryModExp-bytes-bytes-bytes-[`++tryModExp++`]] :sqrt: pass:normal[xref:#Math-sqrt-uint256-[`++sqrt++`]] :sqrt: pass:normal[xref:#Math-sqrt-uint256-enum-Math-Rounding-[`++sqrt++`]] :log2: pass:normal[xref:#Math-log2-uint256-[`++log2++`]] :log2: pass:normal[xref:#Math-log2-uint256-enum-Math-Rounding-[`++log2++`]] :log10: pass:normal[xref:#Math-log10-uint256-[`++log10++`]] :log10: pass:normal[xref:#Math-log10-uint256-enum-Math-Rounding-[`++log10++`]] :log256: pass:normal[xref:#Math-log256-uint256-[`++log256++`]] :log256: pass:normal[xref:#Math-log256-uint256-enum-Math-Rounding-[`++log256++`]] :unsignedRoundsUp: pass:normal[xref:#Math-unsignedRoundsUp-enum-Math-Rounding-[`++unsignedRoundsUp++`]] [.contract] [[Math]] === `++Math++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/math/Math.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/math/Math.sol"; ``` Standard math utilities missing in the Solidity language. [.contract-index] .Functions -- * {xref-Math-tryAdd-uint256-uint256-}[`++tryAdd(a, b)++`] * {xref-Math-trySub-uint256-uint256-}[`++trySub(a, b)++`] * {xref-Math-tryMul-uint256-uint256-}[`++tryMul(a, b)++`] * {xref-Math-tryDiv-uint256-uint256-}[`++tryDiv(a, b)++`] * {xref-Math-tryMod-uint256-uint256-}[`++tryMod(a, b)++`] * {xref-Math-ternary-bool-uint256-uint256-}[`++ternary(condition, a, b)++`] * {xref-Math-max-uint256-uint256-}[`++max(a, b)++`] * {xref-Math-min-uint256-uint256-}[`++min(a, b)++`] * {xref-Math-average-uint256-uint256-}[`++average(a, b)++`] * {xref-Math-ceilDiv-uint256-uint256-}[`++ceilDiv(a, b)++`] * {xref-Math-mulDiv-uint256-uint256-uint256-}[`++mulDiv(x, y, denominator)++`] * {xref-Math-mulDiv-uint256-uint256-uint256-enum-Math-Rounding-}[`++mulDiv(x, y, denominator, rounding)++`] * {xref-Math-invMod-uint256-uint256-}[`++invMod(a, n)++`] * {xref-Math-invModPrime-uint256-uint256-}[`++invModPrime(a, p)++`] * {xref-Math-modExp-uint256-uint256-uint256-}[`++modExp(b, e, m)++`] * {xref-Math-tryModExp-uint256-uint256-uint256-}[`++tryModExp(b, e, m)++`] * {xref-Math-modExp-bytes-bytes-bytes-}[`++modExp(b, e, m)++`] * {xref-Math-tryModExp-bytes-bytes-bytes-}[`++tryModExp(b, e, m)++`] * {xref-Math-sqrt-uint256-}[`++sqrt(a)++`] * {xref-Math-sqrt-uint256-enum-Math-Rounding-}[`++sqrt(a, rounding)++`] * {xref-Math-log2-uint256-}[`++log2(value)++`] * {xref-Math-log2-uint256-enum-Math-Rounding-}[`++log2(value, rounding)++`] * {xref-Math-log10-uint256-}[`++log10(value)++`] * {xref-Math-log10-uint256-enum-Math-Rounding-}[`++log10(value, rounding)++`] * {xref-Math-log256-uint256-}[`++log256(value)++`] * {xref-Math-log256-uint256-enum-Math-Rounding-}[`++log256(value, rounding)++`] * {xref-Math-unsignedRoundsUp-enum-Math-Rounding-}[`++unsignedRoundsUp(rounding)++`] -- [.contract-item] [[Math-tryAdd-uint256-uint256-]] ==== `[.contract-item-name]#++tryAdd++#++(uint256 a, uint256 b) → bool success, uint256 result++` [.item-kind]#internal# Returns the addition of two unsigned integers, with an success flag (no overflow). [.contract-item] [[Math-trySub-uint256-uint256-]] ==== `[.contract-item-name]#++trySub++#++(uint256 a, uint256 b) → bool success, uint256 result++` [.item-kind]#internal# Returns the subtraction of two unsigned integers, with an success flag (no overflow). [.contract-item] [[Math-tryMul-uint256-uint256-]] ==== `[.contract-item-name]#++tryMul++#++(uint256 a, uint256 b) → bool success, uint256 result++` [.item-kind]#internal# Returns the multiplication of two unsigned integers, with an success flag (no overflow). [.contract-item] [[Math-tryDiv-uint256-uint256-]] ==== `[.contract-item-name]#++tryDiv++#++(uint256 a, uint256 b) → bool success, uint256 result++` [.item-kind]#internal# Returns the division of two unsigned integers, with a success flag (no division by zero). [.contract-item] [[Math-tryMod-uint256-uint256-]] ==== `[.contract-item-name]#++tryMod++#++(uint256 a, uint256 b) → bool success, uint256 result++` [.item-kind]#internal# Returns the remainder of dividing two unsigned integers, with a success flag (no division by zero). [.contract-item] [[Math-ternary-bool-uint256-uint256-]] ==== `[.contract-item-name]#++ternary++#++(bool condition, uint256 a, uint256 b) → uint256++` [.item-kind]#internal# Branchless ternary evaluation for `a ? b : c`. Gas costs are constant. IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone. However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute one branch when needed, making this function more expensive. [.contract-item] [[Math-max-uint256-uint256-]] ==== `[.contract-item-name]#++max++#++(uint256 a, uint256 b) → uint256++` [.item-kind]#internal# Returns the largest of two numbers. [.contract-item] [[Math-min-uint256-uint256-]] ==== `[.contract-item-name]#++min++#++(uint256 a, uint256 b) → uint256++` [.item-kind]#internal# Returns the smallest of two numbers. [.contract-item] [[Math-average-uint256-uint256-]] ==== `[.contract-item-name]#++average++#++(uint256 a, uint256 b) → uint256++` [.item-kind]#internal# Returns the average of two numbers. The result is rounded towards zero. [.contract-item] [[Math-ceilDiv-uint256-uint256-]] ==== `[.contract-item-name]#++ceilDiv++#++(uint256 a, uint256 b) → uint256++` [.item-kind]#internal# Returns the ceiling of the division of two numbers. This differs from standard division with `/` in that it rounds towards infinity instead of rounding towards zero. [.contract-item] [[Math-mulDiv-uint256-uint256-uint256-]] ==== `[.contract-item-name]#++mulDiv++#++(uint256 x, uint256 y, uint256 denominator) → uint256 result++` [.item-kind]#internal# Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0. Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by Uniswap Labs also under MIT license. [.contract-item] [[Math-mulDiv-uint256-uint256-uint256-enum-Math-Rounding-]] ==== `[.contract-item-name]#++mulDiv++#++(uint256 x, uint256 y, uint256 denominator, enum Math.Rounding rounding) → uint256++` [.item-kind]#internal# Calculates x * y / denominator with full precision, following the selected rounding direction. [.contract-item] [[Math-invMod-uint256-uint256-]] ==== `[.contract-item-name]#++invMod++#++(uint256 a, uint256 n) → uint256++` [.item-kind]#internal# Calculate the modular multiplicative inverse of a number in Z/nZ. If n is a prime, then Z/nZ is a field. In that case all elements are inversible, except 0. If n is not a prime, then Z/nZ is not a field, and some elements might not be inversible. If the input value is not inversible, 0 is returned. NOTE: If you know for sure that n is (big) a prime, it may be cheaper to use Fermat's little theorem and get the inverse using `Math.modExp(a, n - 2, n)`. See {invModPrime}. [.contract-item] [[Math-invModPrime-uint256-uint256-]] ==== `[.contract-item-name]#++invModPrime++#++(uint256 a, uint256 p) → uint256++` [.item-kind]#internal# Variant of {invMod}. More efficient, but only works if `p` is known to be a prime greater than `2`. From https://en.wikipedia.org/wiki/Fermat%27s_little_theorem[Fermat's little theorem], we know that if p is prime, then `a**(p-1) ≡ 1 mod p`. As a consequence, we have `a * a**(p-2) ≡ 1 mod p`, which means that `a**(p-2)` is the modular multiplicative inverse of a in Fp. NOTE: this function does NOT check that `p` is a prime greater than `2`. [.contract-item] [[Math-modExp-uint256-uint256-uint256-]] ==== `[.contract-item-name]#++modExp++#++(uint256 b, uint256 e, uint256 m) → uint256++` [.item-kind]#internal# Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m) Requirements: - modulus can't be zero - underlying staticcall to precompile must succeed IMPORTANT: The result is only valid if the underlying call succeeds. When using this function, make sure the chain you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack of a revert, but the result may be incorrectly interpreted as 0. [.contract-item] [[Math-tryModExp-uint256-uint256-uint256-]] ==== `[.contract-item-name]#++tryModExp++#++(uint256 b, uint256 e, uint256 m) → bool success, uint256 result++` [.item-kind]#internal# Returns the modular exponentiation of the specified base, exponent and modulus (b ** e % m). It includes a success flag indicating if the operation succeeded. Operation will be marked as failed if trying to operate modulo 0 or if the underlying precompile reverted. IMPORTANT: The result is only valid if the success flag is true. When using this function, make sure the chain you're using it on supports the precompiled contract for modular exponentiation at address 0x05 as specified in https://eips.ethereum.org/EIPS/eip-198[EIP-198]. Otherwise, the underlying function will succeed given the lack of a revert, but the result may be incorrectly interpreted as 0. [.contract-item] [[Math-modExp-bytes-bytes-bytes-]] ==== `[.contract-item-name]#++modExp++#++(bytes b, bytes e, bytes m) → bytes++` [.item-kind]#internal# Variant of {modExp} that supports inputs of arbitrary length. [.contract-item] [[Math-tryModExp-bytes-bytes-bytes-]] ==== `[.contract-item-name]#++tryModExp++#++(bytes b, bytes e, bytes m) → bool success, bytes result++` [.item-kind]#internal# Variant of {tryModExp} that supports inputs of arbitrary length. [.contract-item] [[Math-sqrt-uint256-]] ==== `[.contract-item-name]#++sqrt++#++(uint256 a) → uint256++` [.item-kind]#internal# Returns the square root of a number. If the number is not a perfect square, the value is rounded towards zero. This method is based on Newton's method for computing square roots; the algorithm is restricted to only using integer operations. [.contract-item] [[Math-sqrt-uint256-enum-Math-Rounding-]] ==== `[.contract-item-name]#++sqrt++#++(uint256 a, enum Math.Rounding rounding) → uint256++` [.item-kind]#internal# Calculates sqrt(a), following the selected rounding direction. [.contract-item] [[Math-log2-uint256-]] ==== `[.contract-item-name]#++log2++#++(uint256 value) → uint256++` [.item-kind]#internal# Return the log in base 2 of a positive value rounded towards zero. Returns 0 if given 0. [.contract-item] [[Math-log2-uint256-enum-Math-Rounding-]] ==== `[.contract-item-name]#++log2++#++(uint256 value, enum Math.Rounding rounding) → uint256++` [.item-kind]#internal# Return the log in base 2, following the selected rounding direction, of a positive value. Returns 0 if given 0. [.contract-item] [[Math-log10-uint256-]] ==== `[.contract-item-name]#++log10++#++(uint256 value) → uint256++` [.item-kind]#internal# Return the log in base 10 of a positive value rounded towards zero. Returns 0 if given 0. [.contract-item] [[Math-log10-uint256-enum-Math-Rounding-]] ==== `[.contract-item-name]#++log10++#++(uint256 value, enum Math.Rounding rounding) → uint256++` [.item-kind]#internal# Return the log in base 10, following the selected rounding direction, of a positive value. Returns 0 if given 0. [.contract-item] [[Math-log256-uint256-]] ==== `[.contract-item-name]#++log256++#++(uint256 value) → uint256++` [.item-kind]#internal# Return the log in base 256 of a positive value rounded towards zero. Returns 0 if given 0. Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. [.contract-item] [[Math-log256-uint256-enum-Math-Rounding-]] ==== `[.contract-item-name]#++log256++#++(uint256 value, enum Math.Rounding rounding) → uint256++` [.item-kind]#internal# Return the log in base 256, following the selected rounding direction, of a positive value. Returns 0 if given 0. [.contract-item] [[Math-unsignedRoundsUp-enum-Math-Rounding-]] ==== `[.contract-item-name]#++unsignedRoundsUp++#++(enum Math.Rounding rounding) → bool++` [.item-kind]#internal# Returns whether a provided rounding mode is considered rounding up for unsigned integers. :ternary: pass:normal[xref:#SignedMath-ternary-bool-int256-int256-[`++ternary++`]] :max: pass:normal[xref:#SignedMath-max-int256-int256-[`++max++`]] :min: pass:normal[xref:#SignedMath-min-int256-int256-[`++min++`]] :average: pass:normal[xref:#SignedMath-average-int256-int256-[`++average++`]] :abs: pass:normal[xref:#SignedMath-abs-int256-[`++abs++`]] [.contract] [[SignedMath]] === `++SignedMath++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/math/SignedMath.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/math/SignedMath.sol"; ``` Standard signed math utilities missing in the Solidity language. [.contract-index] .Functions -- * {xref-SignedMath-ternary-bool-int256-int256-}[`++ternary(condition, a, b)++`] * {xref-SignedMath-max-int256-int256-}[`++max(a, b)++`] * {xref-SignedMath-min-int256-int256-}[`++min(a, b)++`] * {xref-SignedMath-average-int256-int256-}[`++average(a, b)++`] * {xref-SignedMath-abs-int256-}[`++abs(n)++`] -- [.contract-item] [[SignedMath-ternary-bool-int256-int256-]] ==== `[.contract-item-name]#++ternary++#++(bool condition, int256 a, int256 b) → int256++` [.item-kind]#internal# Branchless ternary evaluation for `a ? b : c`. Gas costs are constant. IMPORTANT: This function may reduce bytecode size and consume less gas when used standalone. However, the compiler may optimize Solidity ternary operations (i.e. `a ? b : c`) to only compute one branch when needed, making this function more expensive. [.contract-item] [[SignedMath-max-int256-int256-]] ==== `[.contract-item-name]#++max++#++(int256 a, int256 b) → int256++` [.item-kind]#internal# Returns the largest of two signed numbers. [.contract-item] [[SignedMath-min-int256-int256-]] ==== `[.contract-item-name]#++min++#++(int256 a, int256 b) → int256++` [.item-kind]#internal# Returns the smallest of two signed numbers. [.contract-item] [[SignedMath-average-int256-int256-]] ==== `[.contract-item-name]#++average++#++(int256 a, int256 b) → int256++` [.item-kind]#internal# Returns the average of two signed numbers without overflow. The result is rounded towards zero. [.contract-item] [[SignedMath-abs-int256-]] ==== `[.contract-item-name]#++abs++#++(int256 n) → uint256++` [.item-kind]#internal# Returns the absolute unsigned value of a signed value. :SafeCastOverflowedUintDowncast: pass:normal[xref:#SafeCast-SafeCastOverflowedUintDowncast-uint8-uint256-[`++SafeCastOverflowedUintDowncast++`]] :SafeCastOverflowedIntToUint: pass:normal[xref:#SafeCast-SafeCastOverflowedIntToUint-int256-[`++SafeCastOverflowedIntToUint++`]] :SafeCastOverflowedIntDowncast: pass:normal[xref:#SafeCast-SafeCastOverflowedIntDowncast-uint8-int256-[`++SafeCastOverflowedIntDowncast++`]] :SafeCastOverflowedUintToInt: pass:normal[xref:#SafeCast-SafeCastOverflowedUintToInt-uint256-[`++SafeCastOverflowedUintToInt++`]] :toUint248: pass:normal[xref:#SafeCast-toUint248-uint256-[`++toUint248++`]] :toUint240: pass:normal[xref:#SafeCast-toUint240-uint256-[`++toUint240++`]] :toUint232: pass:normal[xref:#SafeCast-toUint232-uint256-[`++toUint232++`]] :toUint224: pass:normal[xref:#SafeCast-toUint224-uint256-[`++toUint224++`]] :toUint216: pass:normal[xref:#SafeCast-toUint216-uint256-[`++toUint216++`]] :toUint208: pass:normal[xref:#SafeCast-toUint208-uint256-[`++toUint208++`]] :toUint200: pass:normal[xref:#SafeCast-toUint200-uint256-[`++toUint200++`]] :toUint192: pass:normal[xref:#SafeCast-toUint192-uint256-[`++toUint192++`]] :toUint184: pass:normal[xref:#SafeCast-toUint184-uint256-[`++toUint184++`]] :toUint176: pass:normal[xref:#SafeCast-toUint176-uint256-[`++toUint176++`]] :toUint168: pass:normal[xref:#SafeCast-toUint168-uint256-[`++toUint168++`]] :toUint160: pass:normal[xref:#SafeCast-toUint160-uint256-[`++toUint160++`]] :toUint152: pass:normal[xref:#SafeCast-toUint152-uint256-[`++toUint152++`]] :toUint144: pass:normal[xref:#SafeCast-toUint144-uint256-[`++toUint144++`]] :toUint136: pass:normal[xref:#SafeCast-toUint136-uint256-[`++toUint136++`]] :toUint128: pass:normal[xref:#SafeCast-toUint128-uint256-[`++toUint128++`]] :toUint120: pass:normal[xref:#SafeCast-toUint120-uint256-[`++toUint120++`]] :toUint112: pass:normal[xref:#SafeCast-toUint112-uint256-[`++toUint112++`]] :toUint104: pass:normal[xref:#SafeCast-toUint104-uint256-[`++toUint104++`]] :toUint96: pass:normal[xref:#SafeCast-toUint96-uint256-[`++toUint96++`]] :toUint88: pass:normal[xref:#SafeCast-toUint88-uint256-[`++toUint88++`]] :toUint80: pass:normal[xref:#SafeCast-toUint80-uint256-[`++toUint80++`]] :toUint72: pass:normal[xref:#SafeCast-toUint72-uint256-[`++toUint72++`]] :toUint64: pass:normal[xref:#SafeCast-toUint64-uint256-[`++toUint64++`]] :toUint56: pass:normal[xref:#SafeCast-toUint56-uint256-[`++toUint56++`]] :toUint48: pass:normal[xref:#SafeCast-toUint48-uint256-[`++toUint48++`]] :toUint40: pass:normal[xref:#SafeCast-toUint40-uint256-[`++toUint40++`]] :toUint32: pass:normal[xref:#SafeCast-toUint32-uint256-[`++toUint32++`]] :toUint24: pass:normal[xref:#SafeCast-toUint24-uint256-[`++toUint24++`]] :toUint16: pass:normal[xref:#SafeCast-toUint16-uint256-[`++toUint16++`]] :toUint8: pass:normal[xref:#SafeCast-toUint8-uint256-[`++toUint8++`]] :toUint256: pass:normal[xref:#SafeCast-toUint256-int256-[`++toUint256++`]] :toInt248: pass:normal[xref:#SafeCast-toInt248-int256-[`++toInt248++`]] :toInt240: pass:normal[xref:#SafeCast-toInt240-int256-[`++toInt240++`]] :toInt232: pass:normal[xref:#SafeCast-toInt232-int256-[`++toInt232++`]] :toInt224: pass:normal[xref:#SafeCast-toInt224-int256-[`++toInt224++`]] :toInt216: pass:normal[xref:#SafeCast-toInt216-int256-[`++toInt216++`]] :toInt208: pass:normal[xref:#SafeCast-toInt208-int256-[`++toInt208++`]] :toInt200: pass:normal[xref:#SafeCast-toInt200-int256-[`++toInt200++`]] :toInt192: pass:normal[xref:#SafeCast-toInt192-int256-[`++toInt192++`]] :toInt184: pass:normal[xref:#SafeCast-toInt184-int256-[`++toInt184++`]] :toInt176: pass:normal[xref:#SafeCast-toInt176-int256-[`++toInt176++`]] :toInt168: pass:normal[xref:#SafeCast-toInt168-int256-[`++toInt168++`]] :toInt160: pass:normal[xref:#SafeCast-toInt160-int256-[`++toInt160++`]] :toInt152: pass:normal[xref:#SafeCast-toInt152-int256-[`++toInt152++`]] :toInt144: pass:normal[xref:#SafeCast-toInt144-int256-[`++toInt144++`]] :toInt136: pass:normal[xref:#SafeCast-toInt136-int256-[`++toInt136++`]] :toInt128: pass:normal[xref:#SafeCast-toInt128-int256-[`++toInt128++`]] :toInt120: pass:normal[xref:#SafeCast-toInt120-int256-[`++toInt120++`]] :toInt112: pass:normal[xref:#SafeCast-toInt112-int256-[`++toInt112++`]] :toInt104: pass:normal[xref:#SafeCast-toInt104-int256-[`++toInt104++`]] :toInt96: pass:normal[xref:#SafeCast-toInt96-int256-[`++toInt96++`]] :toInt88: pass:normal[xref:#SafeCast-toInt88-int256-[`++toInt88++`]] :toInt80: pass:normal[xref:#SafeCast-toInt80-int256-[`++toInt80++`]] :toInt72: pass:normal[xref:#SafeCast-toInt72-int256-[`++toInt72++`]] :toInt64: pass:normal[xref:#SafeCast-toInt64-int256-[`++toInt64++`]] :toInt56: pass:normal[xref:#SafeCast-toInt56-int256-[`++toInt56++`]] :toInt48: pass:normal[xref:#SafeCast-toInt48-int256-[`++toInt48++`]] :toInt40: pass:normal[xref:#SafeCast-toInt40-int256-[`++toInt40++`]] :toInt32: pass:normal[xref:#SafeCast-toInt32-int256-[`++toInt32++`]] :toInt24: pass:normal[xref:#SafeCast-toInt24-int256-[`++toInt24++`]] :toInt16: pass:normal[xref:#SafeCast-toInt16-int256-[`++toInt16++`]] :toInt8: pass:normal[xref:#SafeCast-toInt8-int256-[`++toInt8++`]] :toInt256: pass:normal[xref:#SafeCast-toInt256-uint256-[`++toInt256++`]] :toUint: pass:normal[xref:#SafeCast-toUint-bool-[`++toUint++`]] [.contract] [[SafeCast]] === `++SafeCast++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/math/SafeCast.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/math/SafeCast.sol"; ``` Wrappers over Solidity's uintXX/intXX/bool casting operators with added overflow checks. Downcasting from uint256/int256 in Solidity does not revert on overflow. This can easily result in undesired exploitation or bugs, since developers usually assume that overflows raise errors. `SafeCast` restores this intuition by reverting the transaction when such an operation overflows. Using this library instead of the unchecked operations eliminates an entire class of bugs, so it's recommended to use it always. [.contract-index] .Functions -- * {xref-SafeCast-toUint248-uint256-}[`++toUint248(value)++`] * {xref-SafeCast-toUint240-uint256-}[`++toUint240(value)++`] * {xref-SafeCast-toUint232-uint256-}[`++toUint232(value)++`] * {xref-SafeCast-toUint224-uint256-}[`++toUint224(value)++`] * {xref-SafeCast-toUint216-uint256-}[`++toUint216(value)++`] * {xref-SafeCast-toUint208-uint256-}[`++toUint208(value)++`] * {xref-SafeCast-toUint200-uint256-}[`++toUint200(value)++`] * {xref-SafeCast-toUint192-uint256-}[`++toUint192(value)++`] * {xref-SafeCast-toUint184-uint256-}[`++toUint184(value)++`] * {xref-SafeCast-toUint176-uint256-}[`++toUint176(value)++`] * {xref-SafeCast-toUint168-uint256-}[`++toUint168(value)++`] * {xref-SafeCast-toUint160-uint256-}[`++toUint160(value)++`] * {xref-SafeCast-toUint152-uint256-}[`++toUint152(value)++`] * {xref-SafeCast-toUint144-uint256-}[`++toUint144(value)++`] * {xref-SafeCast-toUint136-uint256-}[`++toUint136(value)++`] * {xref-SafeCast-toUint128-uint256-}[`++toUint128(value)++`] * {xref-SafeCast-toUint120-uint256-}[`++toUint120(value)++`] * {xref-SafeCast-toUint112-uint256-}[`++toUint112(value)++`] * {xref-SafeCast-toUint104-uint256-}[`++toUint104(value)++`] * {xref-SafeCast-toUint96-uint256-}[`++toUint96(value)++`] * {xref-SafeCast-toUint88-uint256-}[`++toUint88(value)++`] * {xref-SafeCast-toUint80-uint256-}[`++toUint80(value)++`] * {xref-SafeCast-toUint72-uint256-}[`++toUint72(value)++`] * {xref-SafeCast-toUint64-uint256-}[`++toUint64(value)++`] * {xref-SafeCast-toUint56-uint256-}[`++toUint56(value)++`] * {xref-SafeCast-toUint48-uint256-}[`++toUint48(value)++`] * {xref-SafeCast-toUint40-uint256-}[`++toUint40(value)++`] * {xref-SafeCast-toUint32-uint256-}[`++toUint32(value)++`] * {xref-SafeCast-toUint24-uint256-}[`++toUint24(value)++`] * {xref-SafeCast-toUint16-uint256-}[`++toUint16(value)++`] * {xref-SafeCast-toUint8-uint256-}[`++toUint8(value)++`] * {xref-SafeCast-toUint256-int256-}[`++toUint256(value)++`] * {xref-SafeCast-toInt248-int256-}[`++toInt248(value)++`] * {xref-SafeCast-toInt240-int256-}[`++toInt240(value)++`] * {xref-SafeCast-toInt232-int256-}[`++toInt232(value)++`] * {xref-SafeCast-toInt224-int256-}[`++toInt224(value)++`] * {xref-SafeCast-toInt216-int256-}[`++toInt216(value)++`] * {xref-SafeCast-toInt208-int256-}[`++toInt208(value)++`] * {xref-SafeCast-toInt200-int256-}[`++toInt200(value)++`] * {xref-SafeCast-toInt192-int256-}[`++toInt192(value)++`] * {xref-SafeCast-toInt184-int256-}[`++toInt184(value)++`] * {xref-SafeCast-toInt176-int256-}[`++toInt176(value)++`] * {xref-SafeCast-toInt168-int256-}[`++toInt168(value)++`] * {xref-SafeCast-toInt160-int256-}[`++toInt160(value)++`] * {xref-SafeCast-toInt152-int256-}[`++toInt152(value)++`] * {xref-SafeCast-toInt144-int256-}[`++toInt144(value)++`] * {xref-SafeCast-toInt136-int256-}[`++toInt136(value)++`] * {xref-SafeCast-toInt128-int256-}[`++toInt128(value)++`] * {xref-SafeCast-toInt120-int256-}[`++toInt120(value)++`] * {xref-SafeCast-toInt112-int256-}[`++toInt112(value)++`] * {xref-SafeCast-toInt104-int256-}[`++toInt104(value)++`] * {xref-SafeCast-toInt96-int256-}[`++toInt96(value)++`] * {xref-SafeCast-toInt88-int256-}[`++toInt88(value)++`] * {xref-SafeCast-toInt80-int256-}[`++toInt80(value)++`] * {xref-SafeCast-toInt72-int256-}[`++toInt72(value)++`] * {xref-SafeCast-toInt64-int256-}[`++toInt64(value)++`] * {xref-SafeCast-toInt56-int256-}[`++toInt56(value)++`] * {xref-SafeCast-toInt48-int256-}[`++toInt48(value)++`] * {xref-SafeCast-toInt40-int256-}[`++toInt40(value)++`] * {xref-SafeCast-toInt32-int256-}[`++toInt32(value)++`] * {xref-SafeCast-toInt24-int256-}[`++toInt24(value)++`] * {xref-SafeCast-toInt16-int256-}[`++toInt16(value)++`] * {xref-SafeCast-toInt8-int256-}[`++toInt8(value)++`] * {xref-SafeCast-toInt256-uint256-}[`++toInt256(value)++`] * {xref-SafeCast-toUint-bool-}[`++toUint(b)++`] -- [.contract-index] .Errors -- * {xref-SafeCast-SafeCastOverflowedUintDowncast-uint8-uint256-}[`++SafeCastOverflowedUintDowncast(bits, value)++`] * {xref-SafeCast-SafeCastOverflowedIntToUint-int256-}[`++SafeCastOverflowedIntToUint(value)++`] * {xref-SafeCast-SafeCastOverflowedIntDowncast-uint8-int256-}[`++SafeCastOverflowedIntDowncast(bits, value)++`] * {xref-SafeCast-SafeCastOverflowedUintToInt-uint256-}[`++SafeCastOverflowedUintToInt(value)++`] -- [.contract-item] [[SafeCast-toUint248-uint256-]] ==== `[.contract-item-name]#++toUint248++#++(uint256 value) → uint248++` [.item-kind]#internal# Returns the downcasted uint248 from uint256, reverting on overflow (when the input is greater than largest uint248). Counterpart to Solidity's `uint248` operator. Requirements: - input must fit into 248 bits [.contract-item] [[SafeCast-toUint240-uint256-]] ==== `[.contract-item-name]#++toUint240++#++(uint256 value) → uint240++` [.item-kind]#internal# Returns the downcasted uint240 from uint256, reverting on overflow (when the input is greater than largest uint240). Counterpart to Solidity's `uint240` operator. Requirements: - input must fit into 240 bits [.contract-item] [[SafeCast-toUint232-uint256-]] ==== `[.contract-item-name]#++toUint232++#++(uint256 value) → uint232++` [.item-kind]#internal# Returns the downcasted uint232 from uint256, reverting on overflow (when the input is greater than largest uint232). Counterpart to Solidity's `uint232` operator. Requirements: - input must fit into 232 bits [.contract-item] [[SafeCast-toUint224-uint256-]] ==== `[.contract-item-name]#++toUint224++#++(uint256 value) → uint224++` [.item-kind]#internal# Returns the downcasted uint224 from uint256, reverting on overflow (when the input is greater than largest uint224). Counterpart to Solidity's `uint224` operator. Requirements: - input must fit into 224 bits [.contract-item] [[SafeCast-toUint216-uint256-]] ==== `[.contract-item-name]#++toUint216++#++(uint256 value) → uint216++` [.item-kind]#internal# Returns the downcasted uint216 from uint256, reverting on overflow (when the input is greater than largest uint216). Counterpart to Solidity's `uint216` operator. Requirements: - input must fit into 216 bits [.contract-item] [[SafeCast-toUint208-uint256-]] ==== `[.contract-item-name]#++toUint208++#++(uint256 value) → uint208++` [.item-kind]#internal# Returns the downcasted uint208 from uint256, reverting on overflow (when the input is greater than largest uint208). Counterpart to Solidity's `uint208` operator. Requirements: - input must fit into 208 bits [.contract-item] [[SafeCast-toUint200-uint256-]] ==== `[.contract-item-name]#++toUint200++#++(uint256 value) → uint200++` [.item-kind]#internal# Returns the downcasted uint200 from uint256, reverting on overflow (when the input is greater than largest uint200). Counterpart to Solidity's `uint200` operator. Requirements: - input must fit into 200 bits [.contract-item] [[SafeCast-toUint192-uint256-]] ==== `[.contract-item-name]#++toUint192++#++(uint256 value) → uint192++` [.item-kind]#internal# Returns the downcasted uint192 from uint256, reverting on overflow (when the input is greater than largest uint192). Counterpart to Solidity's `uint192` operator. Requirements: - input must fit into 192 bits [.contract-item] [[SafeCast-toUint184-uint256-]] ==== `[.contract-item-name]#++toUint184++#++(uint256 value) → uint184++` [.item-kind]#internal# Returns the downcasted uint184 from uint256, reverting on overflow (when the input is greater than largest uint184). Counterpart to Solidity's `uint184` operator. Requirements: - input must fit into 184 bits [.contract-item] [[SafeCast-toUint176-uint256-]] ==== `[.contract-item-name]#++toUint176++#++(uint256 value) → uint176++` [.item-kind]#internal# Returns the downcasted uint176 from uint256, reverting on overflow (when the input is greater than largest uint176). Counterpart to Solidity's `uint176` operator. Requirements: - input must fit into 176 bits [.contract-item] [[SafeCast-toUint168-uint256-]] ==== `[.contract-item-name]#++toUint168++#++(uint256 value) → uint168++` [.item-kind]#internal# Returns the downcasted uint168 from uint256, reverting on overflow (when the input is greater than largest uint168). Counterpart to Solidity's `uint168` operator. Requirements: - input must fit into 168 bits [.contract-item] [[SafeCast-toUint160-uint256-]] ==== `[.contract-item-name]#++toUint160++#++(uint256 value) → uint160++` [.item-kind]#internal# Returns the downcasted uint160 from uint256, reverting on overflow (when the input is greater than largest uint160). Counterpart to Solidity's `uint160` operator. Requirements: - input must fit into 160 bits [.contract-item] [[SafeCast-toUint152-uint256-]] ==== `[.contract-item-name]#++toUint152++#++(uint256 value) → uint152++` [.item-kind]#internal# Returns the downcasted uint152 from uint256, reverting on overflow (when the input is greater than largest uint152). Counterpart to Solidity's `uint152` operator. Requirements: - input must fit into 152 bits [.contract-item] [[SafeCast-toUint144-uint256-]] ==== `[.contract-item-name]#++toUint144++#++(uint256 value) → uint144++` [.item-kind]#internal# Returns the downcasted uint144 from uint256, reverting on overflow (when the input is greater than largest uint144). Counterpart to Solidity's `uint144` operator. Requirements: - input must fit into 144 bits [.contract-item] [[SafeCast-toUint136-uint256-]] ==== `[.contract-item-name]#++toUint136++#++(uint256 value) → uint136++` [.item-kind]#internal# Returns the downcasted uint136 from uint256, reverting on overflow (when the input is greater than largest uint136). Counterpart to Solidity's `uint136` operator. Requirements: - input must fit into 136 bits [.contract-item] [[SafeCast-toUint128-uint256-]] ==== `[.contract-item-name]#++toUint128++#++(uint256 value) → uint128++` [.item-kind]#internal# Returns the downcasted uint128 from uint256, reverting on overflow (when the input is greater than largest uint128). Counterpart to Solidity's `uint128` operator. Requirements: - input must fit into 128 bits [.contract-item] [[SafeCast-toUint120-uint256-]] ==== `[.contract-item-name]#++toUint120++#++(uint256 value) → uint120++` [.item-kind]#internal# Returns the downcasted uint120 from uint256, reverting on overflow (when the input is greater than largest uint120). Counterpart to Solidity's `uint120` operator. Requirements: - input must fit into 120 bits [.contract-item] [[SafeCast-toUint112-uint256-]] ==== `[.contract-item-name]#++toUint112++#++(uint256 value) → uint112++` [.item-kind]#internal# Returns the downcasted uint112 from uint256, reverting on overflow (when the input is greater than largest uint112). Counterpart to Solidity's `uint112` operator. Requirements: - input must fit into 112 bits [.contract-item] [[SafeCast-toUint104-uint256-]] ==== `[.contract-item-name]#++toUint104++#++(uint256 value) → uint104++` [.item-kind]#internal# Returns the downcasted uint104 from uint256, reverting on overflow (when the input is greater than largest uint104). Counterpart to Solidity's `uint104` operator. Requirements: - input must fit into 104 bits [.contract-item] [[SafeCast-toUint96-uint256-]] ==== `[.contract-item-name]#++toUint96++#++(uint256 value) → uint96++` [.item-kind]#internal# Returns the downcasted uint96 from uint256, reverting on overflow (when the input is greater than largest uint96). Counterpart to Solidity's `uint96` operator. Requirements: - input must fit into 96 bits [.contract-item] [[SafeCast-toUint88-uint256-]] ==== `[.contract-item-name]#++toUint88++#++(uint256 value) → uint88++` [.item-kind]#internal# Returns the downcasted uint88 from uint256, reverting on overflow (when the input is greater than largest uint88). Counterpart to Solidity's `uint88` operator. Requirements: - input must fit into 88 bits [.contract-item] [[SafeCast-toUint80-uint256-]] ==== `[.contract-item-name]#++toUint80++#++(uint256 value) → uint80++` [.item-kind]#internal# Returns the downcasted uint80 from uint256, reverting on overflow (when the input is greater than largest uint80). Counterpart to Solidity's `uint80` operator. Requirements: - input must fit into 80 bits [.contract-item] [[SafeCast-toUint72-uint256-]] ==== `[.contract-item-name]#++toUint72++#++(uint256 value) → uint72++` [.item-kind]#internal# Returns the downcasted uint72 from uint256, reverting on overflow (when the input is greater than largest uint72). Counterpart to Solidity's `uint72` operator. Requirements: - input must fit into 72 bits [.contract-item] [[SafeCast-toUint64-uint256-]] ==== `[.contract-item-name]#++toUint64++#++(uint256 value) → uint64++` [.item-kind]#internal# Returns the downcasted uint64 from uint256, reverting on overflow (when the input is greater than largest uint64). Counterpart to Solidity's `uint64` operator. Requirements: - input must fit into 64 bits [.contract-item] [[SafeCast-toUint56-uint256-]] ==== `[.contract-item-name]#++toUint56++#++(uint256 value) → uint56++` [.item-kind]#internal# Returns the downcasted uint56 from uint256, reverting on overflow (when the input is greater than largest uint56). Counterpart to Solidity's `uint56` operator. Requirements: - input must fit into 56 bits [.contract-item] [[SafeCast-toUint48-uint256-]] ==== `[.contract-item-name]#++toUint48++#++(uint256 value) → uint48++` [.item-kind]#internal# Returns the downcasted uint48 from uint256, reverting on overflow (when the input is greater than largest uint48). Counterpart to Solidity's `uint48` operator. Requirements: - input must fit into 48 bits [.contract-item] [[SafeCast-toUint40-uint256-]] ==== `[.contract-item-name]#++toUint40++#++(uint256 value) → uint40++` [.item-kind]#internal# Returns the downcasted uint40 from uint256, reverting on overflow (when the input is greater than largest uint40). Counterpart to Solidity's `uint40` operator. Requirements: - input must fit into 40 bits [.contract-item] [[SafeCast-toUint32-uint256-]] ==== `[.contract-item-name]#++toUint32++#++(uint256 value) → uint32++` [.item-kind]#internal# Returns the downcasted uint32 from uint256, reverting on overflow (when the input is greater than largest uint32). Counterpart to Solidity's `uint32` operator. Requirements: - input must fit into 32 bits [.contract-item] [[SafeCast-toUint24-uint256-]] ==== `[.contract-item-name]#++toUint24++#++(uint256 value) → uint24++` [.item-kind]#internal# Returns the downcasted uint24 from uint256, reverting on overflow (when the input is greater than largest uint24). Counterpart to Solidity's `uint24` operator. Requirements: - input must fit into 24 bits [.contract-item] [[SafeCast-toUint16-uint256-]] ==== `[.contract-item-name]#++toUint16++#++(uint256 value) → uint16++` [.item-kind]#internal# Returns the downcasted uint16 from uint256, reverting on overflow (when the input is greater than largest uint16). Counterpart to Solidity's `uint16` operator. Requirements: - input must fit into 16 bits [.contract-item] [[SafeCast-toUint8-uint256-]] ==== `[.contract-item-name]#++toUint8++#++(uint256 value) → uint8++` [.item-kind]#internal# Returns the downcasted uint8 from uint256, reverting on overflow (when the input is greater than largest uint8). Counterpart to Solidity's `uint8` operator. Requirements: - input must fit into 8 bits [.contract-item] [[SafeCast-toUint256-int256-]] ==== `[.contract-item-name]#++toUint256++#++(int256 value) → uint256++` [.item-kind]#internal# Converts a signed int256 into an unsigned uint256. Requirements: - input must be greater than or equal to 0. [.contract-item] [[SafeCast-toInt248-int256-]] ==== `[.contract-item-name]#++toInt248++#++(int256 value) → int248 downcasted++` [.item-kind]#internal# Returns the downcasted int248 from int256, reverting on overflow (when the input is less than smallest int248 or greater than largest int248). Counterpart to Solidity's `int248` operator. Requirements: - input must fit into 248 bits [.contract-item] [[SafeCast-toInt240-int256-]] ==== `[.contract-item-name]#++toInt240++#++(int256 value) → int240 downcasted++` [.item-kind]#internal# Returns the downcasted int240 from int256, reverting on overflow (when the input is less than smallest int240 or greater than largest int240). Counterpart to Solidity's `int240` operator. Requirements: - input must fit into 240 bits [.contract-item] [[SafeCast-toInt232-int256-]] ==== `[.contract-item-name]#++toInt232++#++(int256 value) → int232 downcasted++` [.item-kind]#internal# Returns the downcasted int232 from int256, reverting on overflow (when the input is less than smallest int232 or greater than largest int232). Counterpart to Solidity's `int232` operator. Requirements: - input must fit into 232 bits [.contract-item] [[SafeCast-toInt224-int256-]] ==== `[.contract-item-name]#++toInt224++#++(int256 value) → int224 downcasted++` [.item-kind]#internal# Returns the downcasted int224 from int256, reverting on overflow (when the input is less than smallest int224 or greater than largest int224). Counterpart to Solidity's `int224` operator. Requirements: - input must fit into 224 bits [.contract-item] [[SafeCast-toInt216-int256-]] ==== `[.contract-item-name]#++toInt216++#++(int256 value) → int216 downcasted++` [.item-kind]#internal# Returns the downcasted int216 from int256, reverting on overflow (when the input is less than smallest int216 or greater than largest int216). Counterpart to Solidity's `int216` operator. Requirements: - input must fit into 216 bits [.contract-item] [[SafeCast-toInt208-int256-]] ==== `[.contract-item-name]#++toInt208++#++(int256 value) → int208 downcasted++` [.item-kind]#internal# Returns the downcasted int208 from int256, reverting on overflow (when the input is less than smallest int208 or greater than largest int208). Counterpart to Solidity's `int208` operator. Requirements: - input must fit into 208 bits [.contract-item] [[SafeCast-toInt200-int256-]] ==== `[.contract-item-name]#++toInt200++#++(int256 value) → int200 downcasted++` [.item-kind]#internal# Returns the downcasted int200 from int256, reverting on overflow (when the input is less than smallest int200 or greater than largest int200). Counterpart to Solidity's `int200` operator. Requirements: - input must fit into 200 bits [.contract-item] [[SafeCast-toInt192-int256-]] ==== `[.contract-item-name]#++toInt192++#++(int256 value) → int192 downcasted++` [.item-kind]#internal# Returns the downcasted int192 from int256, reverting on overflow (when the input is less than smallest int192 or greater than largest int192). Counterpart to Solidity's `int192` operator. Requirements: - input must fit into 192 bits [.contract-item] [[SafeCast-toInt184-int256-]] ==== `[.contract-item-name]#++toInt184++#++(int256 value) → int184 downcasted++` [.item-kind]#internal# Returns the downcasted int184 from int256, reverting on overflow (when the input is less than smallest int184 or greater than largest int184). Counterpart to Solidity's `int184` operator. Requirements: - input must fit into 184 bits [.contract-item] [[SafeCast-toInt176-int256-]] ==== `[.contract-item-name]#++toInt176++#++(int256 value) → int176 downcasted++` [.item-kind]#internal# Returns the downcasted int176 from int256, reverting on overflow (when the input is less than smallest int176 or greater than largest int176). Counterpart to Solidity's `int176` operator. Requirements: - input must fit into 176 bits [.contract-item] [[SafeCast-toInt168-int256-]] ==== `[.contract-item-name]#++toInt168++#++(int256 value) → int168 downcasted++` [.item-kind]#internal# Returns the downcasted int168 from int256, reverting on overflow (when the input is less than smallest int168 or greater than largest int168). Counterpart to Solidity's `int168` operator. Requirements: - input must fit into 168 bits [.contract-item] [[SafeCast-toInt160-int256-]] ==== `[.contract-item-name]#++toInt160++#++(int256 value) → int160 downcasted++` [.item-kind]#internal# Returns the downcasted int160 from int256, reverting on overflow (when the input is less than smallest int160 or greater than largest int160). Counterpart to Solidity's `int160` operator. Requirements: - input must fit into 160 bits [.contract-item] [[SafeCast-toInt152-int256-]] ==== `[.contract-item-name]#++toInt152++#++(int256 value) → int152 downcasted++` [.item-kind]#internal# Returns the downcasted int152 from int256, reverting on overflow (when the input is less than smallest int152 or greater than largest int152). Counterpart to Solidity's `int152` operator. Requirements: - input must fit into 152 bits [.contract-item] [[SafeCast-toInt144-int256-]] ==== `[.contract-item-name]#++toInt144++#++(int256 value) → int144 downcasted++` [.item-kind]#internal# Returns the downcasted int144 from int256, reverting on overflow (when the input is less than smallest int144 or greater than largest int144). Counterpart to Solidity's `int144` operator. Requirements: - input must fit into 144 bits [.contract-item] [[SafeCast-toInt136-int256-]] ==== `[.contract-item-name]#++toInt136++#++(int256 value) → int136 downcasted++` [.item-kind]#internal# Returns the downcasted int136 from int256, reverting on overflow (when the input is less than smallest int136 or greater than largest int136). Counterpart to Solidity's `int136` operator. Requirements: - input must fit into 136 bits [.contract-item] [[SafeCast-toInt128-int256-]] ==== `[.contract-item-name]#++toInt128++#++(int256 value) → int128 downcasted++` [.item-kind]#internal# Returns the downcasted int128 from int256, reverting on overflow (when the input is less than smallest int128 or greater than largest int128). Counterpart to Solidity's `int128` operator. Requirements: - input must fit into 128 bits [.contract-item] [[SafeCast-toInt120-int256-]] ==== `[.contract-item-name]#++toInt120++#++(int256 value) → int120 downcasted++` [.item-kind]#internal# Returns the downcasted int120 from int256, reverting on overflow (when the input is less than smallest int120 or greater than largest int120). Counterpart to Solidity's `int120` operator. Requirements: - input must fit into 120 bits [.contract-item] [[SafeCast-toInt112-int256-]] ==== `[.contract-item-name]#++toInt112++#++(int256 value) → int112 downcasted++` [.item-kind]#internal# Returns the downcasted int112 from int256, reverting on overflow (when the input is less than smallest int112 or greater than largest int112). Counterpart to Solidity's `int112` operator. Requirements: - input must fit into 112 bits [.contract-item] [[SafeCast-toInt104-int256-]] ==== `[.contract-item-name]#++toInt104++#++(int256 value) → int104 downcasted++` [.item-kind]#internal# Returns the downcasted int104 from int256, reverting on overflow (when the input is less than smallest int104 or greater than largest int104). Counterpart to Solidity's `int104` operator. Requirements: - input must fit into 104 bits [.contract-item] [[SafeCast-toInt96-int256-]] ==== `[.contract-item-name]#++toInt96++#++(int256 value) → int96 downcasted++` [.item-kind]#internal# Returns the downcasted int96 from int256, reverting on overflow (when the input is less than smallest int96 or greater than largest int96). Counterpart to Solidity's `int96` operator. Requirements: - input must fit into 96 bits [.contract-item] [[SafeCast-toInt88-int256-]] ==== `[.contract-item-name]#++toInt88++#++(int256 value) → int88 downcasted++` [.item-kind]#internal# Returns the downcasted int88 from int256, reverting on overflow (when the input is less than smallest int88 or greater than largest int88). Counterpart to Solidity's `int88` operator. Requirements: - input must fit into 88 bits [.contract-item] [[SafeCast-toInt80-int256-]] ==== `[.contract-item-name]#++toInt80++#++(int256 value) → int80 downcasted++` [.item-kind]#internal# Returns the downcasted int80 from int256, reverting on overflow (when the input is less than smallest int80 or greater than largest int80). Counterpart to Solidity's `int80` operator. Requirements: - input must fit into 80 bits [.contract-item] [[SafeCast-toInt72-int256-]] ==== `[.contract-item-name]#++toInt72++#++(int256 value) → int72 downcasted++` [.item-kind]#internal# Returns the downcasted int72 from int256, reverting on overflow (when the input is less than smallest int72 or greater than largest int72). Counterpart to Solidity's `int72` operator. Requirements: - input must fit into 72 bits [.contract-item] [[SafeCast-toInt64-int256-]] ==== `[.contract-item-name]#++toInt64++#++(int256 value) → int64 downcasted++` [.item-kind]#internal# Returns the downcasted int64 from int256, reverting on overflow (when the input is less than smallest int64 or greater than largest int64). Counterpart to Solidity's `int64` operator. Requirements: - input must fit into 64 bits [.contract-item] [[SafeCast-toInt56-int256-]] ==== `[.contract-item-name]#++toInt56++#++(int256 value) → int56 downcasted++` [.item-kind]#internal# Returns the downcasted int56 from int256, reverting on overflow (when the input is less than smallest int56 or greater than largest int56). Counterpart to Solidity's `int56` operator. Requirements: - input must fit into 56 bits [.contract-item] [[SafeCast-toInt48-int256-]] ==== `[.contract-item-name]#++toInt48++#++(int256 value) → int48 downcasted++` [.item-kind]#internal# Returns the downcasted int48 from int256, reverting on overflow (when the input is less than smallest int48 or greater than largest int48). Counterpart to Solidity's `int48` operator. Requirements: - input must fit into 48 bits [.contract-item] [[SafeCast-toInt40-int256-]] ==== `[.contract-item-name]#++toInt40++#++(int256 value) → int40 downcasted++` [.item-kind]#internal# Returns the downcasted int40 from int256, reverting on overflow (when the input is less than smallest int40 or greater than largest int40). Counterpart to Solidity's `int40` operator. Requirements: - input must fit into 40 bits [.contract-item] [[SafeCast-toInt32-int256-]] ==== `[.contract-item-name]#++toInt32++#++(int256 value) → int32 downcasted++` [.item-kind]#internal# Returns the downcasted int32 from int256, reverting on overflow (when the input is less than smallest int32 or greater than largest int32). Counterpart to Solidity's `int32` operator. Requirements: - input must fit into 32 bits [.contract-item] [[SafeCast-toInt24-int256-]] ==== `[.contract-item-name]#++toInt24++#++(int256 value) → int24 downcasted++` [.item-kind]#internal# Returns the downcasted int24 from int256, reverting on overflow (when the input is less than smallest int24 or greater than largest int24). Counterpart to Solidity's `int24` operator. Requirements: - input must fit into 24 bits [.contract-item] [[SafeCast-toInt16-int256-]] ==== `[.contract-item-name]#++toInt16++#++(int256 value) → int16 downcasted++` [.item-kind]#internal# Returns the downcasted int16 from int256, reverting on overflow (when the input is less than smallest int16 or greater than largest int16). Counterpart to Solidity's `int16` operator. Requirements: - input must fit into 16 bits [.contract-item] [[SafeCast-toInt8-int256-]] ==== `[.contract-item-name]#++toInt8++#++(int256 value) → int8 downcasted++` [.item-kind]#internal# Returns the downcasted int8 from int256, reverting on overflow (when the input is less than smallest int8 or greater than largest int8). Counterpart to Solidity's `int8` operator. Requirements: - input must fit into 8 bits [.contract-item] [[SafeCast-toInt256-uint256-]] ==== `[.contract-item-name]#++toInt256++#++(uint256 value) → int256++` [.item-kind]#internal# Converts an unsigned uint256 into a signed int256. Requirements: - input must be less than or equal to maxInt256. [.contract-item] [[SafeCast-toUint-bool-]] ==== `[.contract-item-name]#++toUint++#++(bool b) → uint256 u++` [.item-kind]#internal# Cast a boolean (false or true) to a uint256 (0 or 1) with no jump. [.contract-item] [[SafeCast-SafeCastOverflowedUintDowncast-uint8-uint256-]] ==== `[.contract-item-name]#++SafeCastOverflowedUintDowncast++#++(uint8 bits, uint256 value)++` [.item-kind]#error# Value doesn't fit in an uint of `bits` size. [.contract-item] [[SafeCast-SafeCastOverflowedIntToUint-int256-]] ==== `[.contract-item-name]#++SafeCastOverflowedIntToUint++#++(int256 value)++` [.item-kind]#error# An int value doesn't fit in an uint of `bits` size. [.contract-item] [[SafeCast-SafeCastOverflowedIntDowncast-uint8-int256-]] ==== `[.contract-item-name]#++SafeCastOverflowedIntDowncast++#++(uint8 bits, int256 value)++` [.item-kind]#error# Value doesn't fit in an int of `bits` size. [.contract-item] [[SafeCast-SafeCastOverflowedUintToInt-uint256-]] ==== `[.contract-item-name]#++SafeCastOverflowedUintToInt++#++(uint256 value)++` [.item-kind]#error# An uint value doesn't fit in an int of `bits` size. == Cryptography :RecoverError: pass:normal[xref:#ECDSA-RecoverError[`++RecoverError++`]] :ECDSAInvalidSignature: pass:normal[xref:#ECDSA-ECDSAInvalidSignature--[`++ECDSAInvalidSignature++`]] :ECDSAInvalidSignatureLength: pass:normal[xref:#ECDSA-ECDSAInvalidSignatureLength-uint256-[`++ECDSAInvalidSignatureLength++`]] :ECDSAInvalidSignatureS: pass:normal[xref:#ECDSA-ECDSAInvalidSignatureS-bytes32-[`++ECDSAInvalidSignatureS++`]] :tryRecover: pass:normal[xref:#ECDSA-tryRecover-bytes32-bytes-[`++tryRecover++`]] :recover: pass:normal[xref:#ECDSA-recover-bytes32-bytes-[`++recover++`]] :tryRecover: pass:normal[xref:#ECDSA-tryRecover-bytes32-bytes32-bytes32-[`++tryRecover++`]] :recover: pass:normal[xref:#ECDSA-recover-bytes32-bytes32-bytes32-[`++recover++`]] :tryRecover: pass:normal[xref:#ECDSA-tryRecover-bytes32-uint8-bytes32-bytes32-[`++tryRecover++`]] :recover: pass:normal[xref:#ECDSA-recover-bytes32-uint8-bytes32-bytes32-[`++recover++`]] [.contract] [[ECDSA]] === `++ECDSA++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/ECDSA.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/ECDSA.sol"; ``` Elliptic Curve Digital Signature Algorithm (ECDSA) operations. These functions can be used to verify that a message was signed by the holder of the private keys of a given address. [.contract-index] .Functions -- * {xref-ECDSA-tryRecover-bytes32-bytes-}[`++tryRecover(hash, signature)++`] * {xref-ECDSA-recover-bytes32-bytes-}[`++recover(hash, signature)++`] * {xref-ECDSA-tryRecover-bytes32-bytes32-bytes32-}[`++tryRecover(hash, r, vs)++`] * {xref-ECDSA-recover-bytes32-bytes32-bytes32-}[`++recover(hash, r, vs)++`] * {xref-ECDSA-tryRecover-bytes32-uint8-bytes32-bytes32-}[`++tryRecover(hash, v, r, s)++`] * {xref-ECDSA-recover-bytes32-uint8-bytes32-bytes32-}[`++recover(hash, v, r, s)++`] -- [.contract-index] .Errors -- * {xref-ECDSA-ECDSAInvalidSignature--}[`++ECDSAInvalidSignature()++`] * {xref-ECDSA-ECDSAInvalidSignatureLength-uint256-}[`++ECDSAInvalidSignatureLength(length)++`] * {xref-ECDSA-ECDSAInvalidSignatureS-bytes32-}[`++ECDSAInvalidSignatureS(s)++`] -- [.contract-item] [[ECDSA-tryRecover-bytes32-bytes-]] ==== `[.contract-item-name]#++tryRecover++#++(bytes32 hash, bytes signature) → address recovered, enum ECDSA.RecoverError err, bytes32 errArg++` [.item-kind]#internal# Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not return address(0) without also returning an error description. Errors are documented using an enum (error type) and a bytes32 providing additional information about the error. If no error is returned, then the address can be used for verification purposes. The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: this function rejects them by requiring the `s` value to be in the lower half order, and the `v` value to be either 27 or 28. IMPORTANT: `hash` _must_ be the result of a hash operation for the verification to be secure: it is possible to craft signatures that recover to arbitrary addresses for non-hashed data. A safe way to ensure this is by receiving a hash of the original message (which may otherwise be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. Documentation for signature generation: - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js] - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers] [.contract-item] [[ECDSA-recover-bytes32-bytes-]] ==== `[.contract-item-name]#++recover++#++(bytes32 hash, bytes signature) → address++` [.item-kind]#internal# Returns the address that signed a hashed message (`hash`) with `signature`. This address can then be used for verification purposes. The `ecrecover` EVM precompile allows for malleable (non-unique) signatures: this function rejects them by requiring the `s` value to be in the lower half order, and the `v` value to be either 27 or 28. IMPORTANT: `hash` _must_ be the result of a hash operation for the verification to be secure: it is possible to craft signatures that recover to arbitrary addresses for non-hashed data. A safe way to ensure this is by receiving a hash of the original message (which may otherwise be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it. [.contract-item] [[ECDSA-tryRecover-bytes32-bytes32-bytes32-]] ==== `[.contract-item-name]#++tryRecover++#++(bytes32 hash, bytes32 r, bytes32 vs) → address recovered, enum ECDSA.RecoverError err, bytes32 errArg++` [.item-kind]#internal# Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately. See https://eips.ethereum.org/EIPS/eip-2098[ERC-2098 short signatures] [.contract-item] [[ECDSA-recover-bytes32-bytes32-bytes32-]] ==== `[.contract-item-name]#++recover++#++(bytes32 hash, bytes32 r, bytes32 vs) → address++` [.item-kind]#internal# Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately. [.contract-item] [[ECDSA-tryRecover-bytes32-uint8-bytes32-bytes32-]] ==== `[.contract-item-name]#++tryRecover++#++(bytes32 hash, uint8 v, bytes32 r, bytes32 s) → address recovered, enum ECDSA.RecoverError err, bytes32 errArg++` [.item-kind]#internal# Overload of {ECDSA-tryRecover} that receives the `v`, `r` and `s` signature fields separately. [.contract-item] [[ECDSA-recover-bytes32-uint8-bytes32-bytes32-]] ==== `[.contract-item-name]#++recover++#++(bytes32 hash, uint8 v, bytes32 r, bytes32 s) → address++` [.item-kind]#internal# Overload of {ECDSA-recover} that receives the `v`, `r` and `s` signature fields separately. [.contract-item] [[ECDSA-ECDSAInvalidSignature--]] ==== `[.contract-item-name]#++ECDSAInvalidSignature++#++()++` [.item-kind]#error# The signature derives the `address(0)`. [.contract-item] [[ECDSA-ECDSAInvalidSignatureLength-uint256-]] ==== `[.contract-item-name]#++ECDSAInvalidSignatureLength++#++(uint256 length)++` [.item-kind]#error# The signature has an invalid length. [.contract-item] [[ECDSA-ECDSAInvalidSignatureS-bytes32-]] ==== `[.contract-item-name]#++ECDSAInvalidSignatureS++#++(bytes32 s)++` [.item-kind]#error# The signature has an S value that is in the upper half order. :JPoint: pass:normal[xref:#P256-JPoint[`++JPoint++`]] :GX: pass:normal[xref:#P256-GX-uint256[`++GX++`]] :GY: pass:normal[xref:#P256-GY-uint256[`++GY++`]] :P: pass:normal[xref:#P256-P-uint256[`++P++`]] :N: pass:normal[xref:#P256-N-uint256[`++N++`]] :A: pass:normal[xref:#P256-A-uint256[`++A++`]] :B: pass:normal[xref:#P256-B-uint256[`++B++`]] :verify: pass:normal[xref:#P256-verify-bytes32-bytes32-bytes32-bytes32-bytes32-[`++verify++`]] :verifyNative: pass:normal[xref:#P256-verifyNative-bytes32-bytes32-bytes32-bytes32-bytes32-[`++verifyNative++`]] :verifySolidity: pass:normal[xref:#P256-verifySolidity-bytes32-bytes32-bytes32-bytes32-bytes32-[`++verifySolidity++`]] :recovery: pass:normal[xref:#P256-recovery-bytes32-uint8-bytes32-bytes32-[`++recovery++`]] :isValidPublicKey: pass:normal[xref:#P256-isValidPublicKey-bytes32-bytes32-[`++isValidPublicKey++`]] [.contract] [[P256]] === `++P256++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/P256.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/P256.sol"; ``` Implementation of secp256r1 verification and recovery functions. The secp256r1 curve (also known as P256) is a NIST standard curve with wide support in modern devices and cryptographic standards. Some notable examples include Apple's Secure Enclave and Android's Keystore as well as authentication protocols like FIDO2. Based on the original https://github.com/itsobvioustech/aa-passkeys-wallet/blob/d3d423f28a4d8dfcb203c7fa0c47f42592a7378e/src/Secp256r1.sol[implementation of itsobvioustech] (GNU General Public License v3.0). Heavily inspired in https://github.com/maxrobot/elliptic-solidity/blob/c4bb1b6e8ae89534d8db3a6b3a6b52219100520f/contracts/Secp256r1.sol[maxrobot] and https://github.com/tdrerup/elliptic-curve-solidity/blob/59a9c25957d4d190eff53b6610731d81a077a15e/contracts/curves/EllipticCurve.sol[tdrerup] implementations. _Available since v5.1._ [.contract-index] .Functions -- * {xref-P256-verify-bytes32-bytes32-bytes32-bytes32-bytes32-}[`++verify(h, r, s, qx, qy)++`] * {xref-P256-verifyNative-bytes32-bytes32-bytes32-bytes32-bytes32-}[`++verifyNative(h, r, s, qx, qy)++`] * {xref-P256-verifySolidity-bytes32-bytes32-bytes32-bytes32-bytes32-}[`++verifySolidity(h, r, s, qx, qy)++`] * {xref-P256-recovery-bytes32-uint8-bytes32-bytes32-}[`++recovery(h, v, r, s)++`] * {xref-P256-isValidPublicKey-bytes32-bytes32-}[`++isValidPublicKey(x, y)++`] -- [.contract-index] .Internal Variables -- * {xref-P256-GX-uint256}[`++uint256 constant GX++`] * {xref-P256-GY-uint256}[`++uint256 constant GY++`] * {xref-P256-P-uint256}[`++uint256 constant P++`] * {xref-P256-N-uint256}[`++uint256 constant N++`] * {xref-P256-A-uint256}[`++uint256 constant A++`] * {xref-P256-B-uint256}[`++uint256 constant B++`] -- [.contract-item] [[P256-verify-bytes32-bytes32-bytes32-bytes32-bytes32-]] ==== `[.contract-item-name]#++verify++#++(bytes32 h, bytes32 r, bytes32 s, bytes32 qx, bytes32 qy) → bool++` [.item-kind]#internal# Verifies a secp256r1 signature using the RIP-7212 precompile and falls back to the Solidity implementation if the precompile is not available. This version should work on all chains, but requires the deployment of more bytecode. [.contract-item] [[P256-verifyNative-bytes32-bytes32-bytes32-bytes32-bytes32-]] ==== `[.contract-item-name]#++verifyNative++#++(bytes32 h, bytes32 r, bytes32 s, bytes32 qx, bytes32 qy) → bool++` [.item-kind]#internal# Same as {verify}, but it will revert if the required precompile is not available. Make sure any logic (code or precompile) deployed at that address is the expected one, otherwise the returned value may be misinterpreted as a positive boolean. [.contract-item] [[P256-verifySolidity-bytes32-bytes32-bytes32-bytes32-bytes32-]] ==== `[.contract-item-name]#++verifySolidity++#++(bytes32 h, bytes32 r, bytes32 s, bytes32 qx, bytes32 qy) → bool++` [.item-kind]#internal# Same as {verify}, but only the Solidity implementation is used. [.contract-item] [[P256-recovery-bytes32-uint8-bytes32-bytes32-]] ==== `[.contract-item-name]#++recovery++#++(bytes32 h, uint8 v, bytes32 r, bytes32 s) → bytes32 x, bytes32 y++` [.item-kind]#internal# Public key recovery [.contract-item] [[P256-isValidPublicKey-bytes32-bytes32-]] ==== `[.contract-item-name]#++isValidPublicKey++#++(bytes32 x, bytes32 y) → bool result++` [.item-kind]#internal# Checks if (x, y) are valid coordinates of a point on the curve. In particular this function checks that x < P and y < P. [.contract-item] [[P256-GX-uint256]] ==== `uint256 [.contract-item-name]#++GX++#` [.item-kind]#internal constant# Generator (x component) [.contract-item] [[P256-GY-uint256]] ==== `uint256 [.contract-item-name]#++GY++#` [.item-kind]#internal constant# Generator (y component) [.contract-item] [[P256-P-uint256]] ==== `uint256 [.contract-item-name]#++P++#` [.item-kind]#internal constant# P (size of the field) [.contract-item] [[P256-N-uint256]] ==== `uint256 [.contract-item-name]#++N++#` [.item-kind]#internal constant# N (order of G) [.contract-item] [[P256-A-uint256]] ==== `uint256 [.contract-item-name]#++A++#` [.item-kind]#internal constant# A parameter of the weierstrass equation [.contract-item] [[P256-B-uint256]] ==== `uint256 [.contract-item-name]#++B++#` [.item-kind]#internal constant# B parameter of the weierstrass equation :pkcs1Sha256: pass:normal[xref:#RSA-pkcs1Sha256-bytes-bytes-bytes-bytes-[`++pkcs1Sha256++`]] :pkcs1Sha256: pass:normal[xref:#RSA-pkcs1Sha256-bytes32-bytes-bytes-bytes-[`++pkcs1Sha256++`]] [.contract] [[RSA]] === `++RSA++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/RSA.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/RSA.sol"; ``` RSA PKCS#1 v1.5 signature verification implementation according to https://datatracker.ietf.org/doc/html/rfc8017[RFC8017]. This library supports PKCS#1 v1.5 padding to avoid malleability via chosen plaintext attacks in practical implementations. The padding follows the EMSA-PKCS1-v1_5-ENCODE encoding definition as per section 9.2 of the RFC. This padding makes RSA semantically secure for signing messages. Inspired by https://github.com/adria0/SolRsaVerify/blob/79c6182cabb9102ea69d4a2e996816091d5f1cd1[Adrià Massanet's work] (GNU General Public License v3.0). _Available since v5.1._ [.contract-index] .Functions -- * {xref-RSA-pkcs1Sha256-bytes-bytes-bytes-bytes-}[`++pkcs1Sha256(data, s, e, n)++`] * {xref-RSA-pkcs1Sha256-bytes32-bytes-bytes-bytes-}[`++pkcs1Sha256(digest, s, e, n)++`] -- [.contract-item] [[RSA-pkcs1Sha256-bytes-bytes-bytes-bytes-]] ==== `[.contract-item-name]#++pkcs1Sha256++#++(bytes data, bytes s, bytes e, bytes n) → bool++` [.item-kind]#internal# Same as {pkcs1Sha256} but using SHA256 to calculate the digest of `data`. [.contract-item] [[RSA-pkcs1Sha256-bytes32-bytes-bytes-bytes-]] ==== `[.contract-item-name]#++pkcs1Sha256++#++(bytes32 digest, bytes s, bytes e, bytes n) → bool++` [.item-kind]#internal# Verifies a PKCSv1.5 signature given a digest according to the verification method described in https://datatracker.ietf.org/doc/html/rfc8017#section-8.2.2[section 8.2.2 of RFC8017] with support for explicit or implicit NULL parameters in the DigestInfo (no other optional parameters are supported). IMPORTANT: For security reason, this function requires the signature and modulus to have a length of at least 2048 bits. If you use a smaller key, consider replacing it with a larger, more secure, one. WARNING: This verification algorithm doesn't prevent replayability. If called multiple times with the same digest, public key and (valid signature), it will return true every time. Consider including an onchain nonce or unique identifier in the message to prevent replay attacks. WARNING: This verification algorithm supports any exponent. NIST recommends using `65537` (or higher). That is the default value many libraries use, such as OpenSSL. Developers may choose to reject public keys using a low exponent out of security concerns. :constructor: pass:normal[xref:#EIP712-constructor-string-string-[`++constructor++`]] :_domainSeparatorV4: pass:normal[xref:#EIP712-_domainSeparatorV4--[`++_domainSeparatorV4++`]] :_hashTypedDataV4: pass:normal[xref:#EIP712-_hashTypedDataV4-bytes32-[`++_hashTypedDataV4++`]] :eip712Domain: pass:normal[xref:#EIP712-eip712Domain--[`++eip712Domain++`]] :_EIP712Name: pass:normal[xref:#EIP712-_EIP712Name--[`++_EIP712Name++`]] :_EIP712Version: pass:normal[xref:#EIP712-_EIP712Version--[`++_EIP712Version++`]] [.contract] [[EIP712]] === `++EIP712++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/EIP712.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/EIP712.sol"; ``` https://eips.ethereum.org/EIPS/eip-712[EIP-712] is a standard for hashing and signing of typed structured data. The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to produce the hash of their typed data using a combination of `abi.encode` and `keccak256`. This contract implements the EIP-712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA ({_hashTypedDataV4}). The implementation of the domain separator was designed to be as efficient as possible while still properly updating the chain id to protect against replay attacks on an eventual fork of the chain. NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask]. NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the separator from the immutable values, which is cheaper than accessing a cached version in cold storage. [.contract-index] .Functions -- * {xref-EIP712-constructor-string-string-}[`++constructor(name, version)++`] * {xref-EIP712-_domainSeparatorV4--}[`++_domainSeparatorV4()++`] * {xref-EIP712-_hashTypedDataV4-bytes32-}[`++_hashTypedDataV4(structHash)++`] * {xref-EIP712-eip712Domain--}[`++eip712Domain()++`] * {xref-EIP712-_EIP712Name--}[`++_EIP712Name()++`] * {xref-EIP712-_EIP712Version--}[`++_EIP712Version()++`] [.contract-subindex-inherited] .IERC5267 -- [.contract-index] .Events -- [.contract-subindex-inherited] .IERC5267 * {xref-IERC5267-EIP712DomainChanged--}[`++EIP712DomainChanged()++`] -- [.contract-item] [[EIP712-constructor-string-string-]] ==== `[.contract-item-name]#++constructor++#++(string name, string version)++` [.item-kind]#internal# Initializes the domain separator and parameter caches. The meaning of `name` and `version` is specified in https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP-712]: - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol. - `version`: the current major version of the signing domain. NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart contract upgrade]. [.contract-item] [[EIP712-_domainSeparatorV4--]] ==== `[.contract-item-name]#++_domainSeparatorV4++#++() → bytes32++` [.item-kind]#internal# Returns the domain separator for the current chain. [.contract-item] [[EIP712-_hashTypedDataV4-bytes32-]] ==== `[.contract-item-name]#++_hashTypedDataV4++#++(bytes32 structHash) → bytes32++` [.item-kind]#internal# Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this function returns the hash of the fully encoded EIP712 message for this domain. This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example: ```solidity bytes32 digest = _hashTypedDataV4(keccak256(abi.encode( keccak256("Mail(address to,string contents)"), mailTo, keccak256(bytes(mailContents)) ))); address signer = ECDSA.recover(digest, signature); ``` [.contract-item] [[EIP712-eip712Domain--]] ==== `[.contract-item-name]#++eip712Domain++#++() → bytes1 fields, string name, string version, uint256 chainId, address verifyingContract, bytes32 salt, uint256[] extensions++` [.item-kind]#public# See {IERC-5267}. [.contract-item] [[EIP712-_EIP712Name--]] ==== `[.contract-item-name]#++_EIP712Name++#++() → string++` [.item-kind]#internal# The name parameter for the EIP712 domain. NOTE: By default this function reads _name which is an immutable value. It only reads from storage if necessary (in case the value is too large to fit in a ShortString). [.contract-item] [[EIP712-_EIP712Version--]] ==== `[.contract-item-name]#++_EIP712Version++#++() → string++` [.item-kind]#internal# The version parameter for the EIP712 domain. NOTE: By default this function reads _version which is an immutable value. It only reads from storage if necessary (in case the value is too large to fit in a ShortString). :toEthSignedMessageHash: pass:normal[xref:#MessageHashUtils-toEthSignedMessageHash-bytes32-[`++toEthSignedMessageHash++`]] :toEthSignedMessageHash: pass:normal[xref:#MessageHashUtils-toEthSignedMessageHash-bytes-[`++toEthSignedMessageHash++`]] :toDataWithIntendedValidatorHash: pass:normal[xref:#MessageHashUtils-toDataWithIntendedValidatorHash-address-bytes-[`++toDataWithIntendedValidatorHash++`]] :toTypedDataHash: pass:normal[xref:#MessageHashUtils-toTypedDataHash-bytes32-bytes32-[`++toTypedDataHash++`]] [.contract] [[MessageHashUtils]] === `++MessageHashUtils++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/MessageHashUtils.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/MessageHashUtils.sol"; ``` Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing. The library provides methods for generating a hash of a message that conforms to the https://eips.ethereum.org/EIPS/eip-191[ERC-191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712] specifications. [.contract-index] .Functions -- * {xref-MessageHashUtils-toEthSignedMessageHash-bytes32-}[`++toEthSignedMessageHash(messageHash)++`] * {xref-MessageHashUtils-toEthSignedMessageHash-bytes-}[`++toEthSignedMessageHash(message)++`] * {xref-MessageHashUtils-toDataWithIntendedValidatorHash-address-bytes-}[`++toDataWithIntendedValidatorHash(validator, data)++`] * {xref-MessageHashUtils-toTypedDataHash-bytes32-bytes32-}[`++toTypedDataHash(domainSeparator, structHash)++`] -- [.contract-item] [[MessageHashUtils-toEthSignedMessageHash-bytes32-]] ==== `[.contract-item-name]#++toEthSignedMessageHash++#++(bytes32 messageHash) → bytes32 digest++` [.item-kind]#internal# Returns the keccak256 digest of an ERC-191 signed data with version `0x45` (`personal_sign` messages). The digest is calculated by prefixing a bytes32 `messageHash` with `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with keccak256, although any bytes32 value can be safely used because the final digest will be re-hashed. See {ECDSA-recover}. [.contract-item] [[MessageHashUtils-toEthSignedMessageHash-bytes-]] ==== `[.contract-item-name]#++toEthSignedMessageHash++#++(bytes message) → bytes32++` [.item-kind]#internal# Returns the keccak256 digest of an ERC-191 signed data with version `0x45` (`personal_sign` messages). The digest is calculated by prefixing an arbitrary `message` with `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method. See {ECDSA-recover}. [.contract-item] [[MessageHashUtils-toDataWithIntendedValidatorHash-address-bytes-]] ==== `[.contract-item-name]#++toDataWithIntendedValidatorHash++#++(address validator, bytes data) → bytes32++` [.item-kind]#internal# Returns the keccak256 digest of an ERC-191 signed data with version `0x00` (data with intended validator). The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended `validator` address. Then hashing the result. See {ECDSA-recover}. [.contract-item] [[MessageHashUtils-toTypedDataHash-bytes32-bytes32-]] ==== `[.contract-item-name]#++toTypedDataHash++#++(bytes32 domainSeparator, bytes32 structHash) → bytes32 digest++` [.item-kind]#internal# Returns the keccak256 digest of an EIP-712 typed data (ERC-191 version `0x01`). The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with `\x19\x01` and hashing the result. It corresponds to the hash signed by the https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712. See {ECDSA-recover}. :isValidSignatureNow: pass:normal[xref:#SignatureChecker-isValidSignatureNow-address-bytes32-bytes-[`++isValidSignatureNow++`]] :isValidERC1271SignatureNow: pass:normal[xref:#SignatureChecker-isValidERC1271SignatureNow-address-bytes32-bytes-[`++isValidERC1271SignatureNow++`]] [.contract] [[SignatureChecker]] === `++SignatureChecker++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/SignatureChecker.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/SignatureChecker.sol"; ``` Signature verification helper that can be used instead of `ECDSA.recover` to seamlessly support both ECDSA signatures from externally owned accounts (EOAs) as well as ERC-1271 signatures from smart contract wallets like Argent and Safe Wallet (previously Gnosis Safe). [.contract-index] .Functions -- * {xref-SignatureChecker-isValidSignatureNow-address-bytes32-bytes-}[`++isValidSignatureNow(signer, hash, signature)++`] * {xref-SignatureChecker-isValidERC1271SignatureNow-address-bytes32-bytes-}[`++isValidERC1271SignatureNow(signer, hash, signature)++`] -- [.contract-item] [[SignatureChecker-isValidSignatureNow-address-bytes32-bytes-]] ==== `[.contract-item-name]#++isValidSignatureNow++#++(address signer, bytes32 hash, bytes signature) → bool++` [.item-kind]#internal# Checks if a signature is valid for a given signer and data hash. If the signer is a smart contract, the signature is validated against that smart contract using ERC-1271, otherwise it's validated using `ECDSA.recover`. NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus change through time. It could return true at block N and false at block N+1 (or the opposite). [.contract-item] [[SignatureChecker-isValidERC1271SignatureNow-address-bytes32-bytes-]] ==== `[.contract-item-name]#++isValidERC1271SignatureNow++#++(address signer, bytes32 hash, bytes signature) → bool++` [.item-kind]#internal# Checks if a signature is valid for a given signer and data hash. The signature is validated against the signer smart contract using ERC-1271. NOTE: Unlike ECDSA signatures, contract signatures are revocable, and the outcome of this function can thus change through time. It could return true at block N and false at block N+1 (or the opposite). :commutativeKeccak256: pass:normal[xref:#Hashes-commutativeKeccak256-bytes32-bytes32-[`++commutativeKeccak256++`]] [.contract] [[Hashes]] === `++Hashes++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/Hashes.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/Hashes.sol"; ``` Library of standard hash functions. _Available since v5.1._ [.contract-index] .Functions -- * {xref-Hashes-commutativeKeccak256-bytes32-bytes32-}[`++commutativeKeccak256(a, b)++`] -- [.contract-item] [[Hashes-commutativeKeccak256-bytes32-bytes32-]] ==== `[.contract-item-name]#++commutativeKeccak256++#++(bytes32 a, bytes32 b) → bytes32++` [.item-kind]#internal# Commutative Keccak256 hash of a sorted pair of bytes32. Frequently used when working with merkle proofs. NOTE: Equivalent to the `standardNodeHash` in our https://github.com/OpenZeppelin/merkle-tree[JavaScript library]. :MerkleProofInvalidMultiproof: pass:normal[xref:#MerkleProof-MerkleProofInvalidMultiproof--[`++MerkleProofInvalidMultiproof++`]] :verify: pass:normal[xref:#MerkleProof-verify-bytes32---bytes32-bytes32-[`++verify++`]] :processProof: pass:normal[xref:#MerkleProof-processProof-bytes32---bytes32-[`++processProof++`]] :verify: pass:normal[xref:#MerkleProof-verify-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++verify++`]] :processProof: pass:normal[xref:#MerkleProof-processProof-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++processProof++`]] :verifyCalldata: pass:normal[xref:#MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-[`++verifyCalldata++`]] :processProofCalldata: pass:normal[xref:#MerkleProof-processProofCalldata-bytes32---bytes32-[`++processProofCalldata++`]] :verifyCalldata: pass:normal[xref:#MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++verifyCalldata++`]] :processProofCalldata: pass:normal[xref:#MerkleProof-processProofCalldata-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++processProofCalldata++`]] :multiProofVerify: pass:normal[xref:#MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---[`++multiProofVerify++`]] :processMultiProof: pass:normal[xref:#MerkleProof-processMultiProof-bytes32---bool---bytes32---[`++processMultiProof++`]] :multiProofVerify: pass:normal[xref:#MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--[`++multiProofVerify++`]] :processMultiProof: pass:normal[xref:#MerkleProof-processMultiProof-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--[`++processMultiProof++`]] :multiProofVerifyCalldata: pass:normal[xref:#MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---[`++multiProofVerifyCalldata++`]] :processMultiProofCalldata: pass:normal[xref:#MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---[`++processMultiProofCalldata++`]] :multiProofVerifyCalldata: pass:normal[xref:#MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--[`++multiProofVerifyCalldata++`]] :processMultiProofCalldata: pass:normal[xref:#MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--[`++processMultiProofCalldata++`]] [.contract] [[MerkleProof]] === `++MerkleProof++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/cryptography/MerkleProof.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; ``` These functions deal with verification of Merkle Tree proofs. The tree and the proofs can be generated using our https://github.com/OpenZeppelin/merkle-tree[JavaScript library]. You will find a quickstart guide in the readme. WARNING: You should avoid using leaf values that are 64 bytes long prior to hashing, or use a hash function other than keccak256 for hashing leaves. This is because the concatenation of a sorted pair of internal nodes in the Merkle tree could be reinterpreted as a leaf value. OpenZeppelin's JavaScript library generates Merkle trees that are safe against this attack out of the box. IMPORTANT: Consider memory side-effects when using custom hashing functions that access memory in an unsafe way. NOTE: This library supports proof verification for merkle trees built using custom _commutative_ hashing functions (i.e. `H(a, b) == H(b, a)`). Proving leaf inclusion in trees built using non-commutative hashing functions requires additional logic that is not supported by this library. [.contract-index] .Functions -- * {xref-MerkleProof-verify-bytes32---bytes32-bytes32-}[`++verify(proof, root, leaf)++`] * {xref-MerkleProof-processProof-bytes32---bytes32-}[`++processProof(proof, leaf)++`] * {xref-MerkleProof-verify-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++verify(proof, root, leaf, hasher)++`] * {xref-MerkleProof-processProof-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++processProof(proof, leaf, hasher)++`] * {xref-MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-}[`++verifyCalldata(proof, root, leaf)++`] * {xref-MerkleProof-processProofCalldata-bytes32---bytes32-}[`++processProofCalldata(proof, leaf)++`] * {xref-MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++verifyCalldata(proof, root, leaf, hasher)++`] * {xref-MerkleProof-processProofCalldata-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++processProofCalldata(proof, leaf, hasher)++`] * {xref-MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---}[`++multiProofVerify(proof, proofFlags, root, leaves)++`] * {xref-MerkleProof-processMultiProof-bytes32---bool---bytes32---}[`++processMultiProof(proof, proofFlags, leaves)++`] * {xref-MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--}[`++multiProofVerify(proof, proofFlags, root, leaves, hasher)++`] * {xref-MerkleProof-processMultiProof-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--}[`++processMultiProof(proof, proofFlags, leaves, hasher)++`] * {xref-MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---}[`++multiProofVerifyCalldata(proof, proofFlags, root, leaves)++`] * {xref-MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---}[`++processMultiProofCalldata(proof, proofFlags, leaves)++`] * {xref-MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--}[`++multiProofVerifyCalldata(proof, proofFlags, root, leaves, hasher)++`] * {xref-MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--}[`++processMultiProofCalldata(proof, proofFlags, leaves, hasher)++`] -- [.contract-index] .Errors -- * {xref-MerkleProof-MerkleProofInvalidMultiproof--}[`++MerkleProofInvalidMultiproof()++`] -- [.contract-item] [[MerkleProof-verify-bytes32---bytes32-bytes32-]] ==== `[.contract-item-name]#++verify++#++(bytes32[] proof, bytes32 root, bytes32 leaf) → bool++` [.item-kind]#internal# Returns true if a `leaf` can be proved to be a part of a Merkle tree defined by `root`. For this, a `proof` must be provided, containing sibling hashes on the branch from the leaf to the root of the tree. Each pair of leaves and each pair of pre-images are assumed to be sorted. This version handles proofs in memory with the default hashing function. [.contract-item] [[MerkleProof-processProof-bytes32---bytes32-]] ==== `[.contract-item-name]#++processProof++#++(bytes32[] proof, bytes32 leaf) → bytes32++` [.item-kind]#internal# Returns the rebuilt hash obtained by traversing a Merkle tree up from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt hash matches the root of the tree. When processing the proof, the pairs of leaves & pre-images are assumed to be sorted. This version handles proofs in memory with the default hashing function. [.contract-item] [[MerkleProof-verify-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++verify++#++(bytes32[] proof, bytes32 root, bytes32 leaf, function (bytes32,bytes32) view returns (bytes32) hasher) → bool++` [.item-kind]#internal# Returns true if a `leaf` can be proved to be a part of a Merkle tree defined by `root`. For this, a `proof` must be provided, containing sibling hashes on the branch from the leaf to the root of the tree. Each pair of leaves and each pair of pre-images are assumed to be sorted. This version handles proofs in memory with a custom hashing function. [.contract-item] [[MerkleProof-processProof-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++processProof++#++(bytes32[] proof, bytes32 leaf, function (bytes32,bytes32) view returns (bytes32) hasher) → bytes32++` [.item-kind]#internal# Returns the rebuilt hash obtained by traversing a Merkle tree up from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt hash matches the root of the tree. When processing the proof, the pairs of leaves & pre-images are assumed to be sorted. This version handles proofs in memory with a custom hashing function. [.contract-item] [[MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-]] ==== `[.contract-item-name]#++verifyCalldata++#++(bytes32[] proof, bytes32 root, bytes32 leaf) → bool++` [.item-kind]#internal# Returns true if a `leaf` can be proved to be a part of a Merkle tree defined by `root`. For this, a `proof` must be provided, containing sibling hashes on the branch from the leaf to the root of the tree. Each pair of leaves and each pair of pre-images are assumed to be sorted. This version handles proofs in calldata with the default hashing function. [.contract-item] [[MerkleProof-processProofCalldata-bytes32---bytes32-]] ==== `[.contract-item-name]#++processProofCalldata++#++(bytes32[] proof, bytes32 leaf) → bytes32++` [.item-kind]#internal# Returns the rebuilt hash obtained by traversing a Merkle tree up from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt hash matches the root of the tree. When processing the proof, the pairs of leaves & pre-images are assumed to be sorted. This version handles proofs in calldata with the default hashing function. [.contract-item] [[MerkleProof-verifyCalldata-bytes32---bytes32-bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++verifyCalldata++#++(bytes32[] proof, bytes32 root, bytes32 leaf, function (bytes32,bytes32) view returns (bytes32) hasher) → bool++` [.item-kind]#internal# Returns true if a `leaf` can be proved to be a part of a Merkle tree defined by `root`. For this, a `proof` must be provided, containing sibling hashes on the branch from the leaf to the root of the tree. Each pair of leaves and each pair of pre-images are assumed to be sorted. This version handles proofs in calldata with a custom hashing function. [.contract-item] [[MerkleProof-processProofCalldata-bytes32---bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++processProofCalldata++#++(bytes32[] proof, bytes32 leaf, function (bytes32,bytes32) view returns (bytes32) hasher) → bytes32++` [.item-kind]#internal# Returns the rebuilt hash obtained by traversing a Merkle tree up from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt hash matches the root of the tree. When processing the proof, the pairs of leaves & pre-images are assumed to be sorted. This version handles proofs in calldata with a custom hashing function. [.contract-item] [[MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---]] ==== `[.contract-item-name]#++multiProofVerify++#++(bytes32[] proof, bool[] proofFlags, bytes32 root, bytes32[] leaves) → bool++` [.item-kind]#internal# Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by `root`, according to `proof` and `proofFlags` as described in {processMultiProof}. This version handles multiproofs in memory with the default hashing function. CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details. NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`. The `leaves` must be validated independently. See {processMultiProof}. [.contract-item] [[MerkleProof-processMultiProof-bytes32---bool---bytes32---]] ==== `[.contract-item-name]#++processMultiProof++#++(bytes32[] proof, bool[] proofFlags, bytes32[] leaves) → bytes32 merkleRoot++` [.item-kind]#internal# Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false respectively. This version handles multiproofs in memory with the default hashing function. CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer). NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op, and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not validating the leaves elsewhere. [.contract-item] [[MerkleProof-multiProofVerify-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++multiProofVerify++#++(bytes32[] proof, bool[] proofFlags, bytes32 root, bytes32[] leaves, function (bytes32,bytes32) view returns (bytes32) hasher) → bool++` [.item-kind]#internal# Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by `root`, according to `proof` and `proofFlags` as described in {processMultiProof}. This version handles multiproofs in memory with a custom hashing function. CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details. NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`. The `leaves` must be validated independently. See {processMultiProof}. [.contract-item] [[MerkleProof-processMultiProof-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++processMultiProof++#++(bytes32[] proof, bool[] proofFlags, bytes32[] leaves, function (bytes32,bytes32) view returns (bytes32) hasher) → bytes32 merkleRoot++` [.item-kind]#internal# Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false respectively. This version handles multiproofs in memory with a custom hashing function. CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer). NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op, and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not validating the leaves elsewhere. [.contract-item] [[MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---]] ==== `[.contract-item-name]#++multiProofVerifyCalldata++#++(bytes32[] proof, bool[] proofFlags, bytes32 root, bytes32[] leaves) → bool++` [.item-kind]#internal# Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by `root`, according to `proof` and `proofFlags` as described in {processMultiProof}. This version handles multiproofs in calldata with the default hashing function. CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details. NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`. The `leaves` must be validated independently. See {processMultiProofCalldata}. [.contract-item] [[MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---]] ==== `[.contract-item-name]#++processMultiProofCalldata++#++(bytes32[] proof, bool[] proofFlags, bytes32[] leaves) → bytes32 merkleRoot++` [.item-kind]#internal# Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false respectively. This version handles multiproofs in calldata with the default hashing function. CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer). NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op, and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not validating the leaves elsewhere. [.contract-item] [[MerkleProof-multiProofVerifyCalldata-bytes32---bool---bytes32-bytes32---function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++multiProofVerifyCalldata++#++(bytes32[] proof, bool[] proofFlags, bytes32 root, bytes32[] leaves, function (bytes32,bytes32) view returns (bytes32) hasher) → bool++` [.item-kind]#internal# Returns true if the `leaves` can be simultaneously proven to be a part of a Merkle tree defined by `root`, according to `proof` and `proofFlags` as described in {processMultiProof}. This version handles multiproofs in calldata with a custom hashing function. CAUTION: Not all Merkle trees admit multiproofs. See {processMultiProof} for details. NOTE: Consider the case where `root == proof[0] && leaves.length == 0` as it will return `true`. The `leaves` must be validated independently. See {processMultiProofCalldata}. [.contract-item] [[MerkleProof-processMultiProofCalldata-bytes32---bool---bytes32---function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++processMultiProofCalldata++#++(bytes32[] proof, bool[] proofFlags, bytes32[] leaves, function (bytes32,bytes32) view returns (bytes32) hasher) → bytes32 merkleRoot++` [.item-kind]#internal# Returns the root of a tree reconstructed from `leaves` and sibling nodes in `proof`. The reconstruction proceeds by incrementally reconstructing all inner nodes by combining a leaf/inner node with either another leaf/inner node or a proof sibling node, depending on whether each `proofFlags` item is true or false respectively. This version handles multiproofs in calldata with a custom hashing function. CAUTION: Not all Merkle trees admit multiproofs. To use multiproofs, it is sufficient to ensure that: 1) the tree is complete (but not necessarily perfect), 2) the leaves to be proven are in the opposite order they are in the tree (i.e., as seen from right to left starting at the deepest layer and continuing at the next layer). NOTE: The _empty set_ (i.e. the case where `proof.length == 1 && leaves.length == 0`) is considered a no-op, and therefore a valid multiproof (i.e. it returns `proof[0]`). Consider disallowing this case if you're not validating the leaves elsewhere. [.contract-item] [[MerkleProof-MerkleProofInvalidMultiproof--]] ==== `[.contract-item-name]#++MerkleProofInvalidMultiproof++#++()++` [.item-kind]#error# The multiproof provided is not valid. == Security :ReentrancyGuardReentrantCall: pass:normal[xref:#ReentrancyGuard-ReentrancyGuardReentrantCall--[`++ReentrancyGuardReentrantCall++`]] :constructor: pass:normal[xref:#ReentrancyGuard-constructor--[`++constructor++`]] :nonReentrant: pass:normal[xref:#ReentrancyGuard-nonReentrant--[`++nonReentrant++`]] :_reentrancyGuardEntered: pass:normal[xref:#ReentrancyGuard-_reentrancyGuardEntered--[`++_reentrancyGuardEntered++`]] [.contract] [[ReentrancyGuard]] === `++ReentrancyGuard++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/ReentrancyGuard.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/ReentrancyGuard.sol"; ``` Contract module that helps prevent reentrant calls to a function. Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier available, which can be applied to functions to make sure there are no nested (reentrant) calls to them. Note that because there is a single `nonReentrant` guard, functions marked as `nonReentrant` may not call one another. This can be worked around by making those functions `private`, and then adding `external` `nonReentrant` entry points to them. TIP: If EIP-1153 (transient storage) is available on the chain you're deploying at, consider using {ReentrancyGuardTransient} instead. TIP: If you would like to learn more about reentrancy and alternative ways to protect against it, check out our blog post https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. [.contract-index] .Modifiers -- * {xref-ReentrancyGuard-nonReentrant--}[`++nonReentrant()++`] -- [.contract-index] .Functions -- * {xref-ReentrancyGuard-constructor--}[`++constructor()++`] * {xref-ReentrancyGuard-_reentrancyGuardEntered--}[`++_reentrancyGuardEntered()++`] -- [.contract-index] .Errors -- * {xref-ReentrancyGuard-ReentrancyGuardReentrantCall--}[`++ReentrancyGuardReentrantCall()++`] -- [.contract-item] [[ReentrancyGuard-nonReentrant--]] ==== `[.contract-item-name]#++nonReentrant++#++()++` [.item-kind]#modifier# Prevents a contract from calling itself, directly or indirectly. Calling a `nonReentrant` function from another `nonReentrant` function is not supported. It is possible to prevent this from happening by making the `nonReentrant` function external, and making it call a `private` function that does the actual work. [.contract-item] [[ReentrancyGuard-constructor--]] ==== `[.contract-item-name]#++constructor++#++()++` [.item-kind]#internal# [.contract-item] [[ReentrancyGuard-_reentrancyGuardEntered--]] ==== `[.contract-item-name]#++_reentrancyGuardEntered++#++() → bool++` [.item-kind]#internal# Returns true if the reentrancy guard is currently set to "entered", which indicates there is a `nonReentrant` function in the call stack. [.contract-item] [[ReentrancyGuard-ReentrancyGuardReentrantCall--]] ==== `[.contract-item-name]#++ReentrancyGuardReentrantCall++#++()++` [.item-kind]#error# Unauthorized reentrant call. :ReentrancyGuardReentrantCall: pass:normal[xref:#ReentrancyGuardTransient-ReentrancyGuardReentrantCall--[`++ReentrancyGuardReentrantCall++`]] :nonReentrant: pass:normal[xref:#ReentrancyGuardTransient-nonReentrant--[`++nonReentrant++`]] :_reentrancyGuardEntered: pass:normal[xref:#ReentrancyGuardTransient-_reentrancyGuardEntered--[`++_reentrancyGuardEntered++`]] [.contract] [[ReentrancyGuardTransient]] === `++ReentrancyGuardTransient++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/ReentrancyGuardTransient.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/ReentrancyGuardTransient.sol"; ``` Variant of {ReentrancyGuard} that uses transient storage. NOTE: This variant only works on networks where EIP-1153 is available. _Available since v5.1._ [.contract-index] .Modifiers -- * {xref-ReentrancyGuardTransient-nonReentrant--}[`++nonReentrant()++`] -- [.contract-index] .Functions -- * {xref-ReentrancyGuardTransient-_reentrancyGuardEntered--}[`++_reentrancyGuardEntered()++`] -- [.contract-index] .Errors -- * {xref-ReentrancyGuardTransient-ReentrancyGuardReentrantCall--}[`++ReentrancyGuardReentrantCall()++`] -- [.contract-item] [[ReentrancyGuardTransient-nonReentrant--]] ==== `[.contract-item-name]#++nonReentrant++#++()++` [.item-kind]#modifier# Prevents a contract from calling itself, directly or indirectly. Calling a `nonReentrant` function from another `nonReentrant` function is not supported. It is possible to prevent this from happening by making the `nonReentrant` function external, and making it call a `private` function that does the actual work. [.contract-item] [[ReentrancyGuardTransient-_reentrancyGuardEntered--]] ==== `[.contract-item-name]#++_reentrancyGuardEntered++#++() → bool++` [.item-kind]#internal# Returns true if the reentrancy guard is currently set to "entered", which indicates there is a `nonReentrant` function in the call stack. [.contract-item] [[ReentrancyGuardTransient-ReentrancyGuardReentrantCall--]] ==== `[.contract-item-name]#++ReentrancyGuardReentrantCall++#++()++` [.item-kind]#error# Unauthorized reentrant call. :Paused: pass:normal[xref:#Pausable-Paused-address-[`++Paused++`]] :Unpaused: pass:normal[xref:#Pausable-Unpaused-address-[`++Unpaused++`]] :EnforcedPause: pass:normal[xref:#Pausable-EnforcedPause--[`++EnforcedPause++`]] :ExpectedPause: pass:normal[xref:#Pausable-ExpectedPause--[`++ExpectedPause++`]] :constructor: pass:normal[xref:#Pausable-constructor--[`++constructor++`]] :whenNotPaused: pass:normal[xref:#Pausable-whenNotPaused--[`++whenNotPaused++`]] :whenPaused: pass:normal[xref:#Pausable-whenPaused--[`++whenPaused++`]] :paused: pass:normal[xref:#Pausable-paused--[`++paused++`]] :_requireNotPaused: pass:normal[xref:#Pausable-_requireNotPaused--[`++_requireNotPaused++`]] :_requirePaused: pass:normal[xref:#Pausable-_requirePaused--[`++_requirePaused++`]] :_pause: pass:normal[xref:#Pausable-_pause--[`++_pause++`]] :_unpause: pass:normal[xref:#Pausable-_unpause--[`++_unpause++`]] [.contract] [[Pausable]] === `++Pausable++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Pausable.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Pausable.sol"; ``` Contract module which allows children to implement an emergency stop mechanism that can be triggered by an authorized account. This module is used through inheritance. It will make available the modifiers `whenNotPaused` and `whenPaused`, which can be applied to the functions of your contract. Note that they will not be pausable by simply including this module, only once the modifiers are put in place. [.contract-index] .Modifiers -- * {xref-Pausable-whenNotPaused--}[`++whenNotPaused()++`] * {xref-Pausable-whenPaused--}[`++whenPaused()++`] -- [.contract-index] .Functions -- * {xref-Pausable-constructor--}[`++constructor()++`] * {xref-Pausable-paused--}[`++paused()++`] * {xref-Pausable-_requireNotPaused--}[`++_requireNotPaused()++`] * {xref-Pausable-_requirePaused--}[`++_requirePaused()++`] * {xref-Pausable-_pause--}[`++_pause()++`] * {xref-Pausable-_unpause--}[`++_unpause()++`] -- [.contract-index] .Events -- * {xref-Pausable-Paused-address-}[`++Paused(account)++`] * {xref-Pausable-Unpaused-address-}[`++Unpaused(account)++`] -- [.contract-index] .Errors -- * {xref-Pausable-EnforcedPause--}[`++EnforcedPause()++`] * {xref-Pausable-ExpectedPause--}[`++ExpectedPause()++`] -- [.contract-item] [[Pausable-whenNotPaused--]] ==== `[.contract-item-name]#++whenNotPaused++#++()++` [.item-kind]#modifier# Modifier to make a function callable only when the contract is not paused. Requirements: - The contract must not be paused. [.contract-item] [[Pausable-whenPaused--]] ==== `[.contract-item-name]#++whenPaused++#++()++` [.item-kind]#modifier# Modifier to make a function callable only when the contract is paused. Requirements: - The contract must be paused. [.contract-item] [[Pausable-constructor--]] ==== `[.contract-item-name]#++constructor++#++()++` [.item-kind]#internal# Initializes the contract in unpaused state. [.contract-item] [[Pausable-paused--]] ==== `[.contract-item-name]#++paused++#++() → bool++` [.item-kind]#public# Returns true if the contract is paused, and false otherwise. [.contract-item] [[Pausable-_requireNotPaused--]] ==== `[.contract-item-name]#++_requireNotPaused++#++()++` [.item-kind]#internal# Throws if the contract is paused. [.contract-item] [[Pausable-_requirePaused--]] ==== `[.contract-item-name]#++_requirePaused++#++()++` [.item-kind]#internal# Throws if the contract is not paused. [.contract-item] [[Pausable-_pause--]] ==== `[.contract-item-name]#++_pause++#++()++` [.item-kind]#internal# Triggers stopped state. Requirements: - The contract must not be paused. [.contract-item] [[Pausable-_unpause--]] ==== `[.contract-item-name]#++_unpause++#++()++` [.item-kind]#internal# Returns to normal state. Requirements: - The contract must be paused. [.contract-item] [[Pausable-Paused-address-]] ==== `[.contract-item-name]#++Paused++#++(address account)++` [.item-kind]#event# Emitted when the pause is triggered by `account`. [.contract-item] [[Pausable-Unpaused-address-]] ==== `[.contract-item-name]#++Unpaused++#++(address account)++` [.item-kind]#event# Emitted when the pause is lifted by `account`. [.contract-item] [[Pausable-EnforcedPause--]] ==== `[.contract-item-name]#++EnforcedPause++#++()++` [.item-kind]#error# The operation failed because the contract is paused. [.contract-item] [[Pausable-ExpectedPause--]] ==== `[.contract-item-name]#++ExpectedPause++#++()++` [.item-kind]#error# The operation failed because the contract is not paused. :InvalidAccountNonce: pass:normal[xref:#Nonces-InvalidAccountNonce-address-uint256-[`++InvalidAccountNonce++`]] :nonces: pass:normal[xref:#Nonces-nonces-address-[`++nonces++`]] :_useNonce: pass:normal[xref:#Nonces-_useNonce-address-[`++_useNonce++`]] :_useCheckedNonce: pass:normal[xref:#Nonces-_useCheckedNonce-address-uint256-[`++_useCheckedNonce++`]] [.contract] [[Nonces]] === `++Nonces++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Nonces.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Nonces.sol"; ``` Provides tracking nonces for addresses. Nonces will only increment. [.contract-index] .Functions -- * {xref-Nonces-nonces-address-}[`++nonces(owner)++`] * {xref-Nonces-_useNonce-address-}[`++_useNonce(owner)++`] * {xref-Nonces-_useCheckedNonce-address-uint256-}[`++_useCheckedNonce(owner, nonce)++`] -- [.contract-index] .Errors -- * {xref-Nonces-InvalidAccountNonce-address-uint256-}[`++InvalidAccountNonce(account, currentNonce)++`] -- [.contract-item] [[Nonces-nonces-address-]] ==== `[.contract-item-name]#++nonces++#++(address owner) → uint256++` [.item-kind]#public# Returns the next unused nonce for an address. [.contract-item] [[Nonces-_useNonce-address-]] ==== `[.contract-item-name]#++_useNonce++#++(address owner) → uint256++` [.item-kind]#internal# Consumes a nonce. Returns the current value and increments nonce. [.contract-item] [[Nonces-_useCheckedNonce-address-uint256-]] ==== `[.contract-item-name]#++_useCheckedNonce++#++(address owner, uint256 nonce)++` [.item-kind]#internal# Same as {_useNonce} but checking that `nonce` is the next valid for `owner`. [.contract-item] [[Nonces-InvalidAccountNonce-address-uint256-]] ==== `[.contract-item-name]#++InvalidAccountNonce++#++(address account, uint256 currentNonce)++` [.item-kind]#error# The nonce used for an `account` is not the expected current nonce. :nonces: pass:normal[xref:#NoncesKeyed-nonces-address-uint192-[`++nonces++`]] :_useNonce: pass:normal[xref:#NoncesKeyed-_useNonce-address-uint192-[`++_useNonce++`]] :_useCheckedNonce: pass:normal[xref:#NoncesKeyed-_useCheckedNonce-address-uint256-[`++_useCheckedNonce++`]] :_useCheckedNonce: pass:normal[xref:#NoncesKeyed-_useCheckedNonce-address-uint192-uint64-[`++_useCheckedNonce++`]] [.contract] [[NoncesKeyed]] === `++NoncesKeyed++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/NoncesKeyed.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/NoncesKeyed.sol"; ``` Alternative to {Nonces}, that supports key-ed nonces. Follows the https://eips.ethereum.org/EIPS/eip-4337#semi-abstracted-nonce-support[ERC-4337's semi-abstracted nonce system]. NOTE: This contract inherits from {Nonces} and reuses its storage for the first nonce key (i.e. `0`). This makes upgrading from {Nonces} to {NoncesKeyed} safe when using their upgradeable versions (e.g. `NoncesKeyedUpgradeable`). Doing so will NOT reset the current state of nonces, avoiding replay attacks where a nonce is reused after the upgrade. [.contract-index] .Functions -- * {xref-NoncesKeyed-nonces-address-uint192-}[`++nonces(owner, key)++`] * {xref-NoncesKeyed-_useNonce-address-uint192-}[`++_useNonce(owner, key)++`] * {xref-NoncesKeyed-_useCheckedNonce-address-uint256-}[`++_useCheckedNonce(owner, keyNonce)++`] * {xref-NoncesKeyed-_useCheckedNonce-address-uint192-uint64-}[`++_useCheckedNonce(owner, key, nonce)++`] [.contract-subindex-inherited] .Nonces * {xref-Nonces-nonces-address-}[`++nonces(owner)++`] * {xref-Nonces-_useNonce-address-}[`++_useNonce(owner)++`] -- [.contract-index] .Errors -- [.contract-subindex-inherited] .Nonces * {xref-Nonces-InvalidAccountNonce-address-uint256-}[`++InvalidAccountNonce(account, currentNonce)++`] -- [.contract-item] [[NoncesKeyed-nonces-address-uint192-]] ==== `[.contract-item-name]#++nonces++#++(address owner, uint192 key) → uint256++` [.item-kind]#public# Returns the next unused nonce for an address and key. Result contains the key prefix. [.contract-item] [[NoncesKeyed-_useNonce-address-uint192-]] ==== `[.contract-item-name]#++_useNonce++#++(address owner, uint192 key) → uint256++` [.item-kind]#internal# Consumes the next unused nonce for an address and key. Returns the current value without the key prefix. Consumed nonce is increased, so calling this function twice with the same arguments will return different (sequential) results. [.contract-item] [[NoncesKeyed-_useCheckedNonce-address-uint256-]] ==== `[.contract-item-name]#++_useCheckedNonce++#++(address owner, uint256 keyNonce)++` [.item-kind]#internal# Same as {_useNonce} but checking that `nonce` is the next valid for `owner`. This version takes the key and the nonce in a single uint256 parameter: - use the first 24 bytes for the key - use the last 8 bytes for the nonce [.contract-item] [[NoncesKeyed-_useCheckedNonce-address-uint192-uint64-]] ==== `[.contract-item-name]#++_useCheckedNonce++#++(address owner, uint192 key, uint64 nonce)++` [.item-kind]#internal# Same as {_useNonce} but checking that `nonce` is the next valid for `owner`. This version takes the key and the nonce as two different parameters. == Introspection This set of interfaces and contracts deal with https://en.wikipedia.org/wiki/Type_introspection[type introspection] of contracts, that is, examining which functions can be called on them. This is usually referred to as a contract's _interface_. Ethereum contracts have no native concept of an interface, so applications must usually simply trust they are not making an incorrect call. For trusted setups this is a non-issue, but often unknown and untrusted third-party addresses need to be interacted with. There may even not be any direct calls to them! (e.g. ERC-20 tokens may be sent to a contract that lacks a way to transfer them out of it, locking them forever). In these cases, a contract _declaring_ its interface can be very helpful in preventing errors. :supportsInterface: pass:normal[xref:#IERC165-supportsInterface-bytes4-[`++supportsInterface++`]] [.contract] [[IERC165]] === `++IERC165++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/introspection/IERC165.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/introspection/IERC165.sol"; ``` Interface of the ERC-165 standard, as defined in the https://eips.ethereum.org/EIPS/eip-165[ERC]. Implementers can declare support of contract interfaces, which can then be queried by others ({ERC165Checker}). For an implementation, see {ERC165}. [.contract-index] .Functions -- * {xref-IERC165-supportsInterface-bytes4-}[`++supportsInterface(interfaceId)++`] -- [.contract-item] [[IERC165-supportsInterface-bytes4-]] ==== `[.contract-item-name]#++supportsInterface++#++(bytes4 interfaceId) → bool++` [.item-kind]#external# Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[ERC section] to learn more about how these ids are created. This function call must use less than 30 000 gas. :supportsInterface: pass:normal[xref:#ERC165-supportsInterface-bytes4-[`++supportsInterface++`]] [.contract] [[ERC165]] === `++ERC165++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/introspection/ERC165.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; ``` Implementation of the {IERC165} interface. Contracts that want to implement ERC-165 should inherit from this contract and override {supportsInterface} to check for the additional interface id that will be supported. For example: ```solidity function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); } ``` [.contract-index] .Functions -- * {xref-ERC165-supportsInterface-bytes4-}[`++supportsInterface(interfaceId)++`] [.contract-subindex-inherited] .IERC165 -- [.contract-item] [[ERC165-supportsInterface-bytes4-]] ==== `[.contract-item-name]#++supportsInterface++#++(bytes4 interfaceId) → bool++` [.item-kind]#public# See {IERC165-supportsInterface}. :supportsERC165: pass:normal[xref:#ERC165Checker-supportsERC165-address-[`++supportsERC165++`]] :supportsInterface: pass:normal[xref:#ERC165Checker-supportsInterface-address-bytes4-[`++supportsInterface++`]] :getSupportedInterfaces: pass:normal[xref:#ERC165Checker-getSupportedInterfaces-address-bytes4---[`++getSupportedInterfaces++`]] :supportsAllInterfaces: pass:normal[xref:#ERC165Checker-supportsAllInterfaces-address-bytes4---[`++supportsAllInterfaces++`]] :supportsERC165InterfaceUnchecked: pass:normal[xref:#ERC165Checker-supportsERC165InterfaceUnchecked-address-bytes4-[`++supportsERC165InterfaceUnchecked++`]] [.contract] [[ERC165Checker]] === `++ERC165Checker++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/introspection/ERC165Checker.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/introspection/ERC165Checker.sol"; ``` Library used to query support of an interface declared via {IERC165}. Note that these functions return the actual result of the query: they do not `revert` if an interface is not supported. It is up to the caller to decide what to do in these cases. [.contract-index] .Functions -- * {xref-ERC165Checker-supportsERC165-address-}[`++supportsERC165(account)++`] * {xref-ERC165Checker-supportsInterface-address-bytes4-}[`++supportsInterface(account, interfaceId)++`] * {xref-ERC165Checker-getSupportedInterfaces-address-bytes4---}[`++getSupportedInterfaces(account, interfaceIds)++`] * {xref-ERC165Checker-supportsAllInterfaces-address-bytes4---}[`++supportsAllInterfaces(account, interfaceIds)++`] * {xref-ERC165Checker-supportsERC165InterfaceUnchecked-address-bytes4-}[`++supportsERC165InterfaceUnchecked(account, interfaceId)++`] -- [.contract-item] [[ERC165Checker-supportsERC165-address-]] ==== `[.contract-item-name]#++supportsERC165++#++(address account) → bool++` [.item-kind]#internal# Returns true if `account` supports the {IERC165} interface. [.contract-item] [[ERC165Checker-supportsInterface-address-bytes4-]] ==== `[.contract-item-name]#++supportsInterface++#++(address account, bytes4 interfaceId) → bool++` [.item-kind]#internal# Returns true if `account` supports the interface defined by `interfaceId`. Support for {IERC165} itself is queried automatically. See {IERC165-supportsInterface}. [.contract-item] [[ERC165Checker-getSupportedInterfaces-address-bytes4---]] ==== `[.contract-item-name]#++getSupportedInterfaces++#++(address account, bytes4[] interfaceIds) → bool[]++` [.item-kind]#internal# Returns a boolean array where each value corresponds to the interfaces passed in and whether they're supported or not. This allows you to batch check interfaces for a contract where your expectation is that some interfaces may not be supported. See {IERC165-supportsInterface}. [.contract-item] [[ERC165Checker-supportsAllInterfaces-address-bytes4---]] ==== `[.contract-item-name]#++supportsAllInterfaces++#++(address account, bytes4[] interfaceIds) → bool++` [.item-kind]#internal# Returns true if `account` supports all the interfaces defined in `interfaceIds`. Support for {IERC165} itself is queried automatically. Batch-querying can lead to gas savings by skipping repeated checks for {IERC165} support. See {IERC165-supportsInterface}. [.contract-item] [[ERC165Checker-supportsERC165InterfaceUnchecked-address-bytes4-]] ==== `[.contract-item-name]#++supportsERC165InterfaceUnchecked++#++(address account, bytes4 interfaceId) → bool++` [.item-kind]#internal# Assumes that account contains a contract that supports ERC-165, otherwise the behavior of this method is undefined. This precondition can be checked with {supportsERC165}. Some precompiled contracts will falsely indicate support for a given interface, so caution should be exercised when using this function. Interface identification is specified in ERC-165. == Data Structures :BitMap: pass:normal[xref:#BitMaps-BitMap[`++BitMap++`]] :get: pass:normal[xref:#BitMaps-get-struct-BitMaps-BitMap-uint256-[`++get++`]] :setTo: pass:normal[xref:#BitMaps-setTo-struct-BitMaps-BitMap-uint256-bool-[`++setTo++`]] :set: pass:normal[xref:#BitMaps-set-struct-BitMaps-BitMap-uint256-[`++set++`]] :unset: pass:normal[xref:#BitMaps-unset-struct-BitMaps-BitMap-uint256-[`++unset++`]] [.contract] [[BitMaps]] === `++BitMaps++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/BitMaps.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/BitMaps.sol"; ``` Library for managing uint256 to bool mapping in a compact and efficient way, provided the keys are sequential. Largely inspired by Uniswap's https://github.com/Uniswap/merkle-distributor/blob/master/contracts/MerkleDistributor.sol[merkle-distributor]. BitMaps pack 256 booleans across each bit of a single 256-bit slot of `uint256` type. Hence booleans corresponding to 256 _sequential_ indices would only consume a single slot, unlike the regular `bool` which would consume an entire slot for a single value. This results in gas savings in two ways: - Setting a zero value to non-zero only once every 256 times - Accessing the same warm slot for every 256 _sequential_ indices [.contract-index] .Functions -- * {xref-BitMaps-get-struct-BitMaps-BitMap-uint256-}[`++get(bitmap, index)++`] * {xref-BitMaps-setTo-struct-BitMaps-BitMap-uint256-bool-}[`++setTo(bitmap, index, value)++`] * {xref-BitMaps-set-struct-BitMaps-BitMap-uint256-}[`++set(bitmap, index)++`] * {xref-BitMaps-unset-struct-BitMaps-BitMap-uint256-}[`++unset(bitmap, index)++`] -- [.contract-item] [[BitMaps-get-struct-BitMaps-BitMap-uint256-]] ==== `[.contract-item-name]#++get++#++(struct BitMaps.BitMap bitmap, uint256 index) → bool++` [.item-kind]#internal# Returns whether the bit at `index` is set. [.contract-item] [[BitMaps-setTo-struct-BitMaps-BitMap-uint256-bool-]] ==== `[.contract-item-name]#++setTo++#++(struct BitMaps.BitMap bitmap, uint256 index, bool value)++` [.item-kind]#internal# Sets the bit at `index` to the boolean `value`. [.contract-item] [[BitMaps-set-struct-BitMaps-BitMap-uint256-]] ==== `[.contract-item-name]#++set++#++(struct BitMaps.BitMap bitmap, uint256 index)++` [.item-kind]#internal# Sets the bit at `index`. [.contract-item] [[BitMaps-unset-struct-BitMaps-BitMap-uint256-]] ==== `[.contract-item-name]#++unset++#++(struct BitMaps.BitMap bitmap, uint256 index)++` [.item-kind]#internal# Unsets the bit at `index`. :EnumerableMapNonexistentKey: pass:normal[xref:#EnumerableMap-EnumerableMapNonexistentKey-bytes32-[`++EnumerableMapNonexistentKey++`]] :Bytes32ToBytes32Map: pass:normal[xref:#EnumerableMap-Bytes32ToBytes32Map[`++Bytes32ToBytes32Map++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-bytes32-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-Bytes32ToBytes32Map-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-Bytes32ToBytes32Map-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToBytes32Map-[`++keys++`]] :UintToUintMap: pass:normal[xref:#EnumerableMap-UintToUintMap[`++UintToUintMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-UintToUintMap-uint256-uint256-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-UintToUintMap-uint256-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-UintToUintMap-uint256-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-UintToUintMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-UintToUintMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-UintToUintMap-uint256-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-UintToUintMap-uint256-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-UintToUintMap-[`++keys++`]] :UintToAddressMap: pass:normal[xref:#EnumerableMap-UintToAddressMap[`++UintToAddressMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-UintToAddressMap-uint256-address-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-UintToAddressMap-uint256-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-UintToAddressMap-uint256-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-UintToAddressMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-UintToAddressMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-UintToAddressMap-uint256-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-UintToAddressMap-uint256-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-UintToAddressMap-[`++keys++`]] :UintToBytes32Map: pass:normal[xref:#EnumerableMap-UintToBytes32Map[`++UintToBytes32Map++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-UintToBytes32Map-uint256-bytes32-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-UintToBytes32Map-uint256-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-UintToBytes32Map-uint256-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-UintToBytes32Map-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-UintToBytes32Map-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-UintToBytes32Map-uint256-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-UintToBytes32Map-uint256-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-UintToBytes32Map-[`++keys++`]] :AddressToUintMap: pass:normal[xref:#EnumerableMap-AddressToUintMap[`++AddressToUintMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-AddressToUintMap-address-uint256-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-AddressToUintMap-address-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-AddressToUintMap-address-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-AddressToUintMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-AddressToUintMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-AddressToUintMap-address-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-AddressToUintMap-address-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-AddressToUintMap-[`++keys++`]] :AddressToAddressMap: pass:normal[xref:#EnumerableMap-AddressToAddressMap[`++AddressToAddressMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-AddressToAddressMap-address-address-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-AddressToAddressMap-address-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-AddressToAddressMap-address-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-AddressToAddressMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-AddressToAddressMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-AddressToAddressMap-address-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-AddressToAddressMap-address-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-AddressToAddressMap-[`++keys++`]] :AddressToBytes32Map: pass:normal[xref:#EnumerableMap-AddressToBytes32Map[`++AddressToBytes32Map++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-AddressToBytes32Map-address-bytes32-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-AddressToBytes32Map-address-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-AddressToBytes32Map-address-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-AddressToBytes32Map-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-AddressToBytes32Map-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-AddressToBytes32Map-address-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-AddressToBytes32Map-address-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-AddressToBytes32Map-[`++keys++`]] :Bytes32ToUintMap: pass:normal[xref:#EnumerableMap-Bytes32ToUintMap[`++Bytes32ToUintMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-Bytes32ToUintMap-bytes32-uint256-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToUintMap-bytes32-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToUintMap-bytes32-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-Bytes32ToUintMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-Bytes32ToUintMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToUintMap-bytes32-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-Bytes32ToUintMap-bytes32-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToUintMap-[`++keys++`]] :Bytes32ToAddressMap: pass:normal[xref:#EnumerableMap-Bytes32ToAddressMap[`++Bytes32ToAddressMap++`]] :set: pass:normal[xref:#EnumerableMap-set-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-address-[`++set++`]] :remove: pass:normal[xref:#EnumerableMap-remove-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-[`++remove++`]] :contains: pass:normal[xref:#EnumerableMap-contains-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-[`++contains++`]] :length: pass:normal[xref:#EnumerableMap-length-struct-EnumerableMap-Bytes32ToAddressMap-[`++length++`]] :at: pass:normal[xref:#EnumerableMap-at-struct-EnumerableMap-Bytes32ToAddressMap-uint256-[`++at++`]] :tryGet: pass:normal[xref:#EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-[`++tryGet++`]] :get: pass:normal[xref:#EnumerableMap-get-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-[`++get++`]] :keys: pass:normal[xref:#EnumerableMap-keys-struct-EnumerableMap-Bytes32ToAddressMap-[`++keys++`]] [.contract] [[EnumerableMap]] === `++EnumerableMap++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/EnumerableMap.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/EnumerableMap.sol"; ``` Library for managing an enumerable variant of Solidity's https://solidity.readthedocs.io/en/latest/types.html#mapping-types[`mapping`] type. Maps have the following properties: - Entries are added, removed, and checked for existence in constant time (O(1)). - Entries are enumerated in O(n). No guarantees are made on the ordering. ```solidity contract Example { // Add the library methods using EnumerableMap for EnumerableMap.UintToAddressMap; // Declare a set state variable EnumerableMap.UintToAddressMap private myMap; } ``` The following map types are supported: - `uint256 -> address` (`UintToAddressMap`) since v3.0.0 - `address -> uint256` (`AddressToUintMap`) since v4.6.0 - `bytes32 -> bytes32` (`Bytes32ToBytes32Map`) since v4.6.0 - `uint256 -> uint256` (`UintToUintMap`) since v4.7.0 - `bytes32 -> uint256` (`Bytes32ToUintMap`) since v4.7.0 - `uint256 -> bytes32` (`UintToBytes32Map`) since v5.1.0 - `address -> address` (`AddressToAddressMap`) since v5.1.0 - `address -> bytes32` (`AddressToBytes32Map`) since v5.1.0 - `bytes32 -> address` (`Bytes32ToAddressMap`) since v5.1.0 [WARNING] ==== Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable. See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. In order to clean an EnumerableMap, you can either remove all elements one by one or create a fresh instance using an array of EnumerableMap. ==== [.contract-index] .Functions -- * {xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-bytes32-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToBytes32Map-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToBytes32Map-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToBytes32Map-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-UintToUintMap-uint256-uint256-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-UintToUintMap-uint256-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-UintToUintMap-uint256-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-UintToUintMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-UintToUintMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToUintMap-uint256-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-UintToUintMap-uint256-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-UintToUintMap-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-UintToAddressMap-uint256-address-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-UintToAddressMap-uint256-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-UintToAddressMap-uint256-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-UintToAddressMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-UintToAddressMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToAddressMap-uint256-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-UintToAddressMap-uint256-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-UintToAddressMap-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-UintToBytes32Map-uint256-bytes32-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-UintToBytes32Map-uint256-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-UintToBytes32Map-uint256-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-UintToBytes32Map-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-UintToBytes32Map-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-UintToBytes32Map-uint256-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-UintToBytes32Map-uint256-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-UintToBytes32Map-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-AddressToUintMap-address-uint256-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-AddressToUintMap-address-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-AddressToUintMap-address-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-AddressToUintMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-AddressToUintMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToUintMap-address-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-AddressToUintMap-address-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-AddressToUintMap-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-AddressToAddressMap-address-address-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-AddressToAddressMap-address-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-AddressToAddressMap-address-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-AddressToAddressMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-AddressToAddressMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToAddressMap-address-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-AddressToAddressMap-address-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-AddressToAddressMap-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-AddressToBytes32Map-address-bytes32-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-AddressToBytes32Map-address-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-AddressToBytes32Map-address-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-AddressToBytes32Map-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-AddressToBytes32Map-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-AddressToBytes32Map-address-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-AddressToBytes32Map-address-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-AddressToBytes32Map-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToUintMap-bytes32-uint256-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToUintMap-bytes32-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToUintMap-bytes32-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToUintMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToUintMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToUintMap-bytes32-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToUintMap-bytes32-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToUintMap-}[`++keys(map)++`] * {xref-EnumerableMap-set-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-address-}[`++set(map, key, value)++`] * {xref-EnumerableMap-remove-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-}[`++remove(map, key)++`] * {xref-EnumerableMap-contains-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-}[`++contains(map, key)++`] * {xref-EnumerableMap-length-struct-EnumerableMap-Bytes32ToAddressMap-}[`++length(map)++`] * {xref-EnumerableMap-at-struct-EnumerableMap-Bytes32ToAddressMap-uint256-}[`++at(map, index)++`] * {xref-EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-}[`++tryGet(map, key)++`] * {xref-EnumerableMap-get-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-}[`++get(map, key)++`] * {xref-EnumerableMap-keys-struct-EnumerableMap-Bytes32ToAddressMap-}[`++keys(map)++`] -- [.contract-index] .Errors -- * {xref-EnumerableMap-EnumerableMapNonexistentKey-bytes32-}[`++EnumerableMapNonexistentKey(key)++`] -- [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-bytes32-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.Bytes32ToBytes32Map map, bytes32 key, bytes32 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.Bytes32ToBytes32Map map, bytes32 key) → bool++` [.item-kind]#internal# Removes a key-value pair from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.Bytes32ToBytes32Map map, bytes32 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-Bytes32ToBytes32Map-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.Bytes32ToBytes32Map map) → uint256++` [.item-kind]#internal# Returns the number of key-value pairs in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-Bytes32ToBytes32Map-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.Bytes32ToBytes32Map map, uint256 index) → bytes32 key, bytes32 value++` [.item-kind]#internal# Returns the key-value pair stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of entries inside the array, and it may change when more entries are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.Bytes32ToBytes32Map map, bytes32 key) → bool exists, bytes32 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-Bytes32ToBytes32Map-bytes32-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.Bytes32ToBytes32Map map, bytes32 key) → bytes32++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-Bytes32ToBytes32Map-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.Bytes32ToBytes32Map map) → bytes32[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-UintToUintMap-uint256-uint256-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.UintToUintMap map, uint256 key, uint256 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-UintToUintMap-uint256-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.UintToUintMap map, uint256 key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-UintToUintMap-uint256-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.UintToUintMap map, uint256 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-UintToUintMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.UintToUintMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-UintToUintMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.UintToUintMap map, uint256 index) → uint256 key, uint256 value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-UintToUintMap-uint256-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.UintToUintMap map, uint256 key) → bool exists, uint256 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-UintToUintMap-uint256-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.UintToUintMap map, uint256 key) → uint256++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-UintToUintMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.UintToUintMap map) → uint256[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-UintToAddressMap-uint256-address-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.UintToAddressMap map, uint256 key, address value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-UintToAddressMap-uint256-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.UintToAddressMap map, uint256 key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-UintToAddressMap-uint256-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.UintToAddressMap map, uint256 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-UintToAddressMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.UintToAddressMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-UintToAddressMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.UintToAddressMap map, uint256 index) → uint256 key, address value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-UintToAddressMap-uint256-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.UintToAddressMap map, uint256 key) → bool exists, address value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-UintToAddressMap-uint256-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.UintToAddressMap map, uint256 key) → address++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-UintToAddressMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.UintToAddressMap map) → uint256[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-UintToBytes32Map-uint256-bytes32-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.UintToBytes32Map map, uint256 key, bytes32 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-UintToBytes32Map-uint256-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.UintToBytes32Map map, uint256 key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-UintToBytes32Map-uint256-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.UintToBytes32Map map, uint256 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-UintToBytes32Map-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.UintToBytes32Map map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-UintToBytes32Map-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.UintToBytes32Map map, uint256 index) → uint256 key, bytes32 value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-UintToBytes32Map-uint256-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.UintToBytes32Map map, uint256 key) → bool exists, bytes32 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-UintToBytes32Map-uint256-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.UintToBytes32Map map, uint256 key) → bytes32++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-UintToBytes32Map-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.UintToBytes32Map map) → uint256[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-AddressToUintMap-address-uint256-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.AddressToUintMap map, address key, uint256 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-AddressToUintMap-address-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.AddressToUintMap map, address key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-AddressToUintMap-address-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.AddressToUintMap map, address key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-AddressToUintMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.AddressToUintMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-AddressToUintMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.AddressToUintMap map, uint256 index) → address key, uint256 value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-AddressToUintMap-address-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.AddressToUintMap map, address key) → bool exists, uint256 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-AddressToUintMap-address-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.AddressToUintMap map, address key) → uint256++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-AddressToUintMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.AddressToUintMap map) → address[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-AddressToAddressMap-address-address-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.AddressToAddressMap map, address key, address value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-AddressToAddressMap-address-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.AddressToAddressMap map, address key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-AddressToAddressMap-address-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.AddressToAddressMap map, address key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-AddressToAddressMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.AddressToAddressMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-AddressToAddressMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.AddressToAddressMap map, uint256 index) → address key, address value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-AddressToAddressMap-address-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.AddressToAddressMap map, address key) → bool exists, address value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-AddressToAddressMap-address-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.AddressToAddressMap map, address key) → address++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-AddressToAddressMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.AddressToAddressMap map) → address[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-AddressToBytes32Map-address-bytes32-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.AddressToBytes32Map map, address key, bytes32 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-AddressToBytes32Map-address-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.AddressToBytes32Map map, address key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-AddressToBytes32Map-address-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.AddressToBytes32Map map, address key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-AddressToBytes32Map-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.AddressToBytes32Map map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-AddressToBytes32Map-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.AddressToBytes32Map map, uint256 index) → address key, bytes32 value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-AddressToBytes32Map-address-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.AddressToBytes32Map map, address key) → bool exists, bytes32 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-AddressToBytes32Map-address-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.AddressToBytes32Map map, address key) → bytes32++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-AddressToBytes32Map-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.AddressToBytes32Map map) → address[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-Bytes32ToUintMap-bytes32-uint256-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.Bytes32ToUintMap map, bytes32 key, uint256 value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-Bytes32ToUintMap-bytes32-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.Bytes32ToUintMap map, bytes32 key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-Bytes32ToUintMap-bytes32-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.Bytes32ToUintMap map, bytes32 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-Bytes32ToUintMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.Bytes32ToUintMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-Bytes32ToUintMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.Bytes32ToUintMap map, uint256 index) → bytes32 key, uint256 value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToUintMap-bytes32-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.Bytes32ToUintMap map, bytes32 key) → bool exists, uint256 value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-Bytes32ToUintMap-bytes32-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.Bytes32ToUintMap map, bytes32 key) → uint256++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-Bytes32ToUintMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.Bytes32ToUintMap map) → bytes32[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-set-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-address-]] ==== `[.contract-item-name]#++set++#++(struct EnumerableMap.Bytes32ToAddressMap map, bytes32 key, address value) → bool++` [.item-kind]#internal# Adds a key-value pair to a map, or updates the value for an existing key. O(1). Returns true if the key was added to the map, that is if it was not already present. [.contract-item] [[EnumerableMap-remove-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableMap.Bytes32ToAddressMap map, bytes32 key) → bool++` [.item-kind]#internal# Removes a value from a map. O(1). Returns true if the key was removed from the map, that is if it was present. [.contract-item] [[EnumerableMap-contains-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableMap.Bytes32ToAddressMap map, bytes32 key) → bool++` [.item-kind]#internal# Returns true if the key is in the map. O(1). [.contract-item] [[EnumerableMap-length-struct-EnumerableMap-Bytes32ToAddressMap-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableMap.Bytes32ToAddressMap map) → uint256++` [.item-kind]#internal# Returns the number of elements in the map. O(1). [.contract-item] [[EnumerableMap-at-struct-EnumerableMap-Bytes32ToAddressMap-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableMap.Bytes32ToAddressMap map, uint256 index) → bytes32 key, address value++` [.item-kind]#internal# Returns the element stored at position `index` in the map. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableMap-tryGet-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-]] ==== `[.contract-item-name]#++tryGet++#++(struct EnumerableMap.Bytes32ToAddressMap map, bytes32 key) → bool exists, address value++` [.item-kind]#internal# Tries to returns the value associated with `key`. O(1). Does not revert if `key` is not in the map. [.contract-item] [[EnumerableMap-get-struct-EnumerableMap-Bytes32ToAddressMap-bytes32-]] ==== `[.contract-item-name]#++get++#++(struct EnumerableMap.Bytes32ToAddressMap map, bytes32 key) → address++` [.item-kind]#internal# Returns the value associated with `key`. O(1). Requirements: - `key` must be in the map. [.contract-item] [[EnumerableMap-keys-struct-EnumerableMap-Bytes32ToAddressMap-]] ==== `[.contract-item-name]#++keys++#++(struct EnumerableMap.Bytes32ToAddressMap map) → bytes32[]++` [.item-kind]#internal# Return the an array containing all the keys WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the map grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableMap-EnumerableMapNonexistentKey-bytes32-]] ==== `[.contract-item-name]#++EnumerableMapNonexistentKey++#++(bytes32 key)++` [.item-kind]#error# Query for a nonexistent map key. :Set: pass:normal[xref:#EnumerableSet-Set[`++Set++`]] :Bytes32Set: pass:normal[xref:#EnumerableSet-Bytes32Set[`++Bytes32Set++`]] :add: pass:normal[xref:#EnumerableSet-add-struct-EnumerableSet-Bytes32Set-bytes32-[`++add++`]] :remove: pass:normal[xref:#EnumerableSet-remove-struct-EnumerableSet-Bytes32Set-bytes32-[`++remove++`]] :contains: pass:normal[xref:#EnumerableSet-contains-struct-EnumerableSet-Bytes32Set-bytes32-[`++contains++`]] :length: pass:normal[xref:#EnumerableSet-length-struct-EnumerableSet-Bytes32Set-[`++length++`]] :at: pass:normal[xref:#EnumerableSet-at-struct-EnumerableSet-Bytes32Set-uint256-[`++at++`]] :values: pass:normal[xref:#EnumerableSet-values-struct-EnumerableSet-Bytes32Set-[`++values++`]] :AddressSet: pass:normal[xref:#EnumerableSet-AddressSet[`++AddressSet++`]] :add: pass:normal[xref:#EnumerableSet-add-struct-EnumerableSet-AddressSet-address-[`++add++`]] :remove: pass:normal[xref:#EnumerableSet-remove-struct-EnumerableSet-AddressSet-address-[`++remove++`]] :contains: pass:normal[xref:#EnumerableSet-contains-struct-EnumerableSet-AddressSet-address-[`++contains++`]] :length: pass:normal[xref:#EnumerableSet-length-struct-EnumerableSet-AddressSet-[`++length++`]] :at: pass:normal[xref:#EnumerableSet-at-struct-EnumerableSet-AddressSet-uint256-[`++at++`]] :values: pass:normal[xref:#EnumerableSet-values-struct-EnumerableSet-AddressSet-[`++values++`]] :UintSet: pass:normal[xref:#EnumerableSet-UintSet[`++UintSet++`]] :add: pass:normal[xref:#EnumerableSet-add-struct-EnumerableSet-UintSet-uint256-[`++add++`]] :remove: pass:normal[xref:#EnumerableSet-remove-struct-EnumerableSet-UintSet-uint256-[`++remove++`]] :contains: pass:normal[xref:#EnumerableSet-contains-struct-EnumerableSet-UintSet-uint256-[`++contains++`]] :length: pass:normal[xref:#EnumerableSet-length-struct-EnumerableSet-UintSet-[`++length++`]] :at: pass:normal[xref:#EnumerableSet-at-struct-EnumerableSet-UintSet-uint256-[`++at++`]] :values: pass:normal[xref:#EnumerableSet-values-struct-EnumerableSet-UintSet-[`++values++`]] [.contract] [[EnumerableSet]] === `++EnumerableSet++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/EnumerableSet.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol"; ``` Library for managing https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive types. Sets have the following properties: - Elements are added, removed, and checked for existence in constant time (O(1)). - Elements are enumerated in O(n). No guarantees are made on the ordering. ```solidity contract Example { // Add the library methods using EnumerableSet for EnumerableSet.AddressSet; // Declare a set state variable EnumerableSet.AddressSet private mySet; } ``` As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) and `uint256` (`UintSet`) are supported. [WARNING] ==== Trying to delete such a structure from storage will likely result in data corruption, rendering the structure unusable. See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an array of EnumerableSet. ==== [.contract-index] .Functions -- * {xref-EnumerableSet-add-struct-EnumerableSet-Bytes32Set-bytes32-}[`++add(set, value)++`] * {xref-EnumerableSet-remove-struct-EnumerableSet-Bytes32Set-bytes32-}[`++remove(set, value)++`] * {xref-EnumerableSet-contains-struct-EnumerableSet-Bytes32Set-bytes32-}[`++contains(set, value)++`] * {xref-EnumerableSet-length-struct-EnumerableSet-Bytes32Set-}[`++length(set)++`] * {xref-EnumerableSet-at-struct-EnumerableSet-Bytes32Set-uint256-}[`++at(set, index)++`] * {xref-EnumerableSet-values-struct-EnumerableSet-Bytes32Set-}[`++values(set)++`] * {xref-EnumerableSet-add-struct-EnumerableSet-AddressSet-address-}[`++add(set, value)++`] * {xref-EnumerableSet-remove-struct-EnumerableSet-AddressSet-address-}[`++remove(set, value)++`] * {xref-EnumerableSet-contains-struct-EnumerableSet-AddressSet-address-}[`++contains(set, value)++`] * {xref-EnumerableSet-length-struct-EnumerableSet-AddressSet-}[`++length(set)++`] * {xref-EnumerableSet-at-struct-EnumerableSet-AddressSet-uint256-}[`++at(set, index)++`] * {xref-EnumerableSet-values-struct-EnumerableSet-AddressSet-}[`++values(set)++`] * {xref-EnumerableSet-add-struct-EnumerableSet-UintSet-uint256-}[`++add(set, value)++`] * {xref-EnumerableSet-remove-struct-EnumerableSet-UintSet-uint256-}[`++remove(set, value)++`] * {xref-EnumerableSet-contains-struct-EnumerableSet-UintSet-uint256-}[`++contains(set, value)++`] * {xref-EnumerableSet-length-struct-EnumerableSet-UintSet-}[`++length(set)++`] * {xref-EnumerableSet-at-struct-EnumerableSet-UintSet-uint256-}[`++at(set, index)++`] * {xref-EnumerableSet-values-struct-EnumerableSet-UintSet-}[`++values(set)++`] -- [.contract-item] [[EnumerableSet-add-struct-EnumerableSet-Bytes32Set-bytes32-]] ==== `[.contract-item-name]#++add++#++(struct EnumerableSet.Bytes32Set set, bytes32 value) → bool++` [.item-kind]#internal# Add a value to a set. O(1). Returns true if the value was added to the set, that is if it was not already present. [.contract-item] [[EnumerableSet-remove-struct-EnumerableSet-Bytes32Set-bytes32-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableSet.Bytes32Set set, bytes32 value) → bool++` [.item-kind]#internal# Removes a value from a set. O(1). Returns true if the value was removed from the set, that is if it was present. [.contract-item] [[EnumerableSet-contains-struct-EnumerableSet-Bytes32Set-bytes32-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableSet.Bytes32Set set, bytes32 value) → bool++` [.item-kind]#internal# Returns true if the value is in the set. O(1). [.contract-item] [[EnumerableSet-length-struct-EnumerableSet-Bytes32Set-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableSet.Bytes32Set set) → uint256++` [.item-kind]#internal# Returns the number of values in the set. O(1). [.contract-item] [[EnumerableSet-at-struct-EnumerableSet-Bytes32Set-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableSet.Bytes32Set set, uint256 index) → bytes32++` [.item-kind]#internal# Returns the value stored at position `index` in the set. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableSet-values-struct-EnumerableSet-Bytes32Set-]] ==== `[.contract-item-name]#++values++#++(struct EnumerableSet.Bytes32Set set) → bytes32[]++` [.item-kind]#internal# Return the entire set in an array WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableSet-add-struct-EnumerableSet-AddressSet-address-]] ==== `[.contract-item-name]#++add++#++(struct EnumerableSet.AddressSet set, address value) → bool++` [.item-kind]#internal# Add a value to a set. O(1). Returns true if the value was added to the set, that is if it was not already present. [.contract-item] [[EnumerableSet-remove-struct-EnumerableSet-AddressSet-address-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableSet.AddressSet set, address value) → bool++` [.item-kind]#internal# Removes a value from a set. O(1). Returns true if the value was removed from the set, that is if it was present. [.contract-item] [[EnumerableSet-contains-struct-EnumerableSet-AddressSet-address-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableSet.AddressSet set, address value) → bool++` [.item-kind]#internal# Returns true if the value is in the set. O(1). [.contract-item] [[EnumerableSet-length-struct-EnumerableSet-AddressSet-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableSet.AddressSet set) → uint256++` [.item-kind]#internal# Returns the number of values in the set. O(1). [.contract-item] [[EnumerableSet-at-struct-EnumerableSet-AddressSet-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableSet.AddressSet set, uint256 index) → address++` [.item-kind]#internal# Returns the value stored at position `index` in the set. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableSet-values-struct-EnumerableSet-AddressSet-]] ==== `[.contract-item-name]#++values++#++(struct EnumerableSet.AddressSet set) → address[]++` [.item-kind]#internal# Return the entire set in an array WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. [.contract-item] [[EnumerableSet-add-struct-EnumerableSet-UintSet-uint256-]] ==== `[.contract-item-name]#++add++#++(struct EnumerableSet.UintSet set, uint256 value) → bool++` [.item-kind]#internal# Add a value to a set. O(1). Returns true if the value was added to the set, that is if it was not already present. [.contract-item] [[EnumerableSet-remove-struct-EnumerableSet-UintSet-uint256-]] ==== `[.contract-item-name]#++remove++#++(struct EnumerableSet.UintSet set, uint256 value) → bool++` [.item-kind]#internal# Removes a value from a set. O(1). Returns true if the value was removed from the set, that is if it was present. [.contract-item] [[EnumerableSet-contains-struct-EnumerableSet-UintSet-uint256-]] ==== `[.contract-item-name]#++contains++#++(struct EnumerableSet.UintSet set, uint256 value) → bool++` [.item-kind]#internal# Returns true if the value is in the set. O(1). [.contract-item] [[EnumerableSet-length-struct-EnumerableSet-UintSet-]] ==== `[.contract-item-name]#++length++#++(struct EnumerableSet.UintSet set) → uint256++` [.item-kind]#internal# Returns the number of values in the set. O(1). [.contract-item] [[EnumerableSet-at-struct-EnumerableSet-UintSet-uint256-]] ==== `[.contract-item-name]#++at++#++(struct EnumerableSet.UintSet set, uint256 index) → uint256++` [.item-kind]#internal# Returns the value stored at position `index` in the set. O(1). Note that there are no guarantees on the ordering of values inside the array, and it may change when more values are added or removed. Requirements: - `index` must be strictly less than {length}. [.contract-item] [[EnumerableSet-values-struct-EnumerableSet-UintSet-]] ==== `[.contract-item-name]#++values++#++(struct EnumerableSet.UintSet set) → uint256[]++` [.item-kind]#internal# Return the entire set in an array WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that this function has an unbounded cost, and using it as part of a state-changing function may render the function uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. :Bytes32Deque: pass:normal[xref:#DoubleEndedQueue-Bytes32Deque[`++Bytes32Deque++`]] :pushBack: pass:normal[xref:#DoubleEndedQueue-pushBack-struct-DoubleEndedQueue-Bytes32Deque-bytes32-[`++pushBack++`]] :popBack: pass:normal[xref:#DoubleEndedQueue-popBack-struct-DoubleEndedQueue-Bytes32Deque-[`++popBack++`]] :pushFront: pass:normal[xref:#DoubleEndedQueue-pushFront-struct-DoubleEndedQueue-Bytes32Deque-bytes32-[`++pushFront++`]] :popFront: pass:normal[xref:#DoubleEndedQueue-popFront-struct-DoubleEndedQueue-Bytes32Deque-[`++popFront++`]] :front: pass:normal[xref:#DoubleEndedQueue-front-struct-DoubleEndedQueue-Bytes32Deque-[`++front++`]] :back: pass:normal[xref:#DoubleEndedQueue-back-struct-DoubleEndedQueue-Bytes32Deque-[`++back++`]] :at: pass:normal[xref:#DoubleEndedQueue-at-struct-DoubleEndedQueue-Bytes32Deque-uint256-[`++at++`]] :clear: pass:normal[xref:#DoubleEndedQueue-clear-struct-DoubleEndedQueue-Bytes32Deque-[`++clear++`]] :length: pass:normal[xref:#DoubleEndedQueue-length-struct-DoubleEndedQueue-Bytes32Deque-[`++length++`]] :empty: pass:normal[xref:#DoubleEndedQueue-empty-struct-DoubleEndedQueue-Bytes32Deque-[`++empty++`]] [.contract] [[DoubleEndedQueue]] === `++DoubleEndedQueue++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/DoubleEndedQueue.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/DoubleEndedQueue.sol"; ``` A sequence of items with the ability to efficiently push and pop items (i.e. insert and remove) on both ends of the sequence (called front and back). Among other access patterns, it can be used to implement efficient LIFO and FIFO queues. Storage use is optimized, and all operations are O(1) constant time. This includes {clear}, given that the existing queue contents are left in storage. The struct is called `Bytes32Deque`. Other types can be cast to and from `bytes32`. This data structure can only be used in storage, and not in memory. ```solidity DoubleEndedQueue.Bytes32Deque queue; ``` [.contract-index] .Functions -- * {xref-DoubleEndedQueue-pushBack-struct-DoubleEndedQueue-Bytes32Deque-bytes32-}[`++pushBack(deque, value)++`] * {xref-DoubleEndedQueue-popBack-struct-DoubleEndedQueue-Bytes32Deque-}[`++popBack(deque)++`] * {xref-DoubleEndedQueue-pushFront-struct-DoubleEndedQueue-Bytes32Deque-bytes32-}[`++pushFront(deque, value)++`] * {xref-DoubleEndedQueue-popFront-struct-DoubleEndedQueue-Bytes32Deque-}[`++popFront(deque)++`] * {xref-DoubleEndedQueue-front-struct-DoubleEndedQueue-Bytes32Deque-}[`++front(deque)++`] * {xref-DoubleEndedQueue-back-struct-DoubleEndedQueue-Bytes32Deque-}[`++back(deque)++`] * {xref-DoubleEndedQueue-at-struct-DoubleEndedQueue-Bytes32Deque-uint256-}[`++at(deque, index)++`] * {xref-DoubleEndedQueue-clear-struct-DoubleEndedQueue-Bytes32Deque-}[`++clear(deque)++`] * {xref-DoubleEndedQueue-length-struct-DoubleEndedQueue-Bytes32Deque-}[`++length(deque)++`] * {xref-DoubleEndedQueue-empty-struct-DoubleEndedQueue-Bytes32Deque-}[`++empty(deque)++`] -- [.contract-item] [[DoubleEndedQueue-pushBack-struct-DoubleEndedQueue-Bytes32Deque-bytes32-]] ==== `[.contract-item-name]#++pushBack++#++(struct DoubleEndedQueue.Bytes32Deque deque, bytes32 value)++` [.item-kind]#internal# Inserts an item at the end of the queue. Reverts with {Panic-RESOURCE_ERROR} if the queue is full. [.contract-item] [[DoubleEndedQueue-popBack-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++popBack++#++(struct DoubleEndedQueue.Bytes32Deque deque) → bytes32 value++` [.item-kind]#internal# Removes the item at the end of the queue and returns it. Reverts with {Panic-EMPTY_ARRAY_POP} if the queue is empty. [.contract-item] [[DoubleEndedQueue-pushFront-struct-DoubleEndedQueue-Bytes32Deque-bytes32-]] ==== `[.contract-item-name]#++pushFront++#++(struct DoubleEndedQueue.Bytes32Deque deque, bytes32 value)++` [.item-kind]#internal# Inserts an item at the beginning of the queue. Reverts with {Panic-RESOURCE_ERROR} if the queue is full. [.contract-item] [[DoubleEndedQueue-popFront-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++popFront++#++(struct DoubleEndedQueue.Bytes32Deque deque) → bytes32 value++` [.item-kind]#internal# Removes the item at the beginning of the queue and returns it. Reverts with {Panic-EMPTY_ARRAY_POP} if the queue is empty. [.contract-item] [[DoubleEndedQueue-front-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++front++#++(struct DoubleEndedQueue.Bytes32Deque deque) → bytes32 value++` [.item-kind]#internal# Returns the item at the beginning of the queue. Reverts with {Panic-ARRAY_OUT_OF_BOUNDS} if the queue is empty. [.contract-item] [[DoubleEndedQueue-back-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++back++#++(struct DoubleEndedQueue.Bytes32Deque deque) → bytes32 value++` [.item-kind]#internal# Returns the item at the end of the queue. Reverts with {Panic-ARRAY_OUT_OF_BOUNDS} if the queue is empty. [.contract-item] [[DoubleEndedQueue-at-struct-DoubleEndedQueue-Bytes32Deque-uint256-]] ==== `[.contract-item-name]#++at++#++(struct DoubleEndedQueue.Bytes32Deque deque, uint256 index) → bytes32 value++` [.item-kind]#internal# Return the item at a position in the queue given by `index`, with the first item at 0 and last item at `length(deque) - 1`. Reverts with {Panic-ARRAY_OUT_OF_BOUNDS} if the index is out of bounds. [.contract-item] [[DoubleEndedQueue-clear-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++clear++#++(struct DoubleEndedQueue.Bytes32Deque deque)++` [.item-kind]#internal# Resets the queue back to being empty. NOTE: The current items are left behind in storage. This does not affect the functioning of the queue, but misses out on potential gas refunds. [.contract-item] [[DoubleEndedQueue-length-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++length++#++(struct DoubleEndedQueue.Bytes32Deque deque) → uint256++` [.item-kind]#internal# Returns the number of items in the queue. [.contract-item] [[DoubleEndedQueue-empty-struct-DoubleEndedQueue-Bytes32Deque-]] ==== `[.contract-item-name]#++empty++#++(struct DoubleEndedQueue.Bytes32Deque deque) → bool++` [.item-kind]#internal# Returns true if the queue is empty. :InvalidBufferSize: pass:normal[xref:#CircularBuffer-InvalidBufferSize--[`++InvalidBufferSize++`]] :Bytes32CircularBuffer: pass:normal[xref:#CircularBuffer-Bytes32CircularBuffer[`++Bytes32CircularBuffer++`]] :setup: pass:normal[xref:#CircularBuffer-setup-struct-CircularBuffer-Bytes32CircularBuffer-uint256-[`++setup++`]] :clear: pass:normal[xref:#CircularBuffer-clear-struct-CircularBuffer-Bytes32CircularBuffer-[`++clear++`]] :push: pass:normal[xref:#CircularBuffer-push-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-[`++push++`]] :count: pass:normal[xref:#CircularBuffer-count-struct-CircularBuffer-Bytes32CircularBuffer-[`++count++`]] :length: pass:normal[xref:#CircularBuffer-length-struct-CircularBuffer-Bytes32CircularBuffer-[`++length++`]] :last: pass:normal[xref:#CircularBuffer-last-struct-CircularBuffer-Bytes32CircularBuffer-uint256-[`++last++`]] :includes: pass:normal[xref:#CircularBuffer-includes-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-[`++includes++`]] [.contract] [[CircularBuffer]] === `++CircularBuffer++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/CircularBuffer.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/CircularBuffer.sol"; ``` A fixed-size buffer for keeping `bytes32` items in storage. This data structure allows for pushing elements to it, and when its length exceeds the specified fixed size, new items take the place of the oldest element in the buffer, keeping at most `N` elements in the structure. Elements can't be removed but the data structure can be cleared. See {clear}. Complexity: - insertion ({push}): O(1) - lookup ({last}): O(1) - inclusion ({includes}): O(N) (worst case) - reset ({clear}): O(1) * The struct is called `Bytes32CircularBuffer`. Other types can be cast to and from `bytes32`. This data structure can only be used in storage, and not in memory. Example usage: ```solidity contract Example { // Add the library methods using CircularBuffer for CircularBuffer.Bytes32CircularBuffer; // Declare a buffer storage variable CircularBuffer.Bytes32CircularBuffer private myBuffer; } ``` _Available since v5.1._ [.contract-index] .Functions -- * {xref-CircularBuffer-setup-struct-CircularBuffer-Bytes32CircularBuffer-uint256-}[`++setup(self, size)++`] * {xref-CircularBuffer-clear-struct-CircularBuffer-Bytes32CircularBuffer-}[`++clear(self)++`] * {xref-CircularBuffer-push-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-}[`++push(self, value)++`] * {xref-CircularBuffer-count-struct-CircularBuffer-Bytes32CircularBuffer-}[`++count(self)++`] * {xref-CircularBuffer-length-struct-CircularBuffer-Bytes32CircularBuffer-}[`++length(self)++`] * {xref-CircularBuffer-last-struct-CircularBuffer-Bytes32CircularBuffer-uint256-}[`++last(self, i)++`] * {xref-CircularBuffer-includes-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-}[`++includes(self, value)++`] -- [.contract-index] .Errors -- * {xref-CircularBuffer-InvalidBufferSize--}[`++InvalidBufferSize()++`] -- [.contract-item] [[CircularBuffer-setup-struct-CircularBuffer-Bytes32CircularBuffer-uint256-]] ==== `[.contract-item-name]#++setup++#++(struct CircularBuffer.Bytes32CircularBuffer self, uint256 size)++` [.item-kind]#internal# Initialize a new CircularBuffer of given size. If the CircularBuffer was already setup and used, calling that function again will reset it to a blank state. NOTE: The size of the buffer will affect the execution of {includes} function, as it has a complexity of O(N). Consider a large buffer size may render the function unusable. [.contract-item] [[CircularBuffer-clear-struct-CircularBuffer-Bytes32CircularBuffer-]] ==== `[.contract-item-name]#++clear++#++(struct CircularBuffer.Bytes32CircularBuffer self)++` [.item-kind]#internal# Clear all data in the buffer without resetting memory, keeping the existing size. [.contract-item] [[CircularBuffer-push-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-]] ==== `[.contract-item-name]#++push++#++(struct CircularBuffer.Bytes32CircularBuffer self, bytes32 value)++` [.item-kind]#internal# Push a new value to the buffer. If the buffer is already full, the new value replaces the oldest value in the buffer. [.contract-item] [[CircularBuffer-count-struct-CircularBuffer-Bytes32CircularBuffer-]] ==== `[.contract-item-name]#++count++#++(struct CircularBuffer.Bytes32CircularBuffer self) → uint256++` [.item-kind]#internal# Number of values currently in the buffer. This value is 0 for an empty buffer, and cannot exceed the size of the buffer. [.contract-item] [[CircularBuffer-length-struct-CircularBuffer-Bytes32CircularBuffer-]] ==== `[.contract-item-name]#++length++#++(struct CircularBuffer.Bytes32CircularBuffer self) → uint256++` [.item-kind]#internal# Length of the buffer. This is the maximum number of elements kept in the buffer. [.contract-item] [[CircularBuffer-last-struct-CircularBuffer-Bytes32CircularBuffer-uint256-]] ==== `[.contract-item-name]#++last++#++(struct CircularBuffer.Bytes32CircularBuffer self, uint256 i) → bytes32++` [.item-kind]#internal# Getter for the i-th value in the buffer, from the end. Reverts with {Panic-ARRAY_OUT_OF_BOUNDS} if trying to access an element that was not pushed, or that was dropped to make room for newer elements. [.contract-item] [[CircularBuffer-includes-struct-CircularBuffer-Bytes32CircularBuffer-bytes32-]] ==== `[.contract-item-name]#++includes++#++(struct CircularBuffer.Bytes32CircularBuffer self, bytes32 value) → bool++` [.item-kind]#internal# Check if a given value is in the buffer. [.contract-item] [[CircularBuffer-InvalidBufferSize--]] ==== `[.contract-item-name]#++InvalidBufferSize++#++()++` [.item-kind]#error# Error emitted when trying to setup a buffer with a size of 0. :CheckpointUnorderedInsertion: pass:normal[xref:#Checkpoints-CheckpointUnorderedInsertion--[`++CheckpointUnorderedInsertion++`]] :Trace224: pass:normal[xref:#Checkpoints-Trace224[`++Trace224++`]] :Checkpoint224: pass:normal[xref:#Checkpoints-Checkpoint224[`++Checkpoint224++`]] :push: pass:normal[xref:#Checkpoints-push-struct-Checkpoints-Trace224-uint32-uint224-[`++push++`]] :lowerLookup: pass:normal[xref:#Checkpoints-lowerLookup-struct-Checkpoints-Trace224-uint32-[`++lowerLookup++`]] :upperLookup: pass:normal[xref:#Checkpoints-upperLookup-struct-Checkpoints-Trace224-uint32-[`++upperLookup++`]] :upperLookupRecent: pass:normal[xref:#Checkpoints-upperLookupRecent-struct-Checkpoints-Trace224-uint32-[`++upperLookupRecent++`]] :latest: pass:normal[xref:#Checkpoints-latest-struct-Checkpoints-Trace224-[`++latest++`]] :latestCheckpoint: pass:normal[xref:#Checkpoints-latestCheckpoint-struct-Checkpoints-Trace224-[`++latestCheckpoint++`]] :length: pass:normal[xref:#Checkpoints-length-struct-Checkpoints-Trace224-[`++length++`]] :at: pass:normal[xref:#Checkpoints-at-struct-Checkpoints-Trace224-uint32-[`++at++`]] :Trace208: pass:normal[xref:#Checkpoints-Trace208[`++Trace208++`]] :Checkpoint208: pass:normal[xref:#Checkpoints-Checkpoint208[`++Checkpoint208++`]] :push: pass:normal[xref:#Checkpoints-push-struct-Checkpoints-Trace208-uint48-uint208-[`++push++`]] :lowerLookup: pass:normal[xref:#Checkpoints-lowerLookup-struct-Checkpoints-Trace208-uint48-[`++lowerLookup++`]] :upperLookup: pass:normal[xref:#Checkpoints-upperLookup-struct-Checkpoints-Trace208-uint48-[`++upperLookup++`]] :upperLookupRecent: pass:normal[xref:#Checkpoints-upperLookupRecent-struct-Checkpoints-Trace208-uint48-[`++upperLookupRecent++`]] :latest: pass:normal[xref:#Checkpoints-latest-struct-Checkpoints-Trace208-[`++latest++`]] :latestCheckpoint: pass:normal[xref:#Checkpoints-latestCheckpoint-struct-Checkpoints-Trace208-[`++latestCheckpoint++`]] :length: pass:normal[xref:#Checkpoints-length-struct-Checkpoints-Trace208-[`++length++`]] :at: pass:normal[xref:#Checkpoints-at-struct-Checkpoints-Trace208-uint32-[`++at++`]] :Trace160: pass:normal[xref:#Checkpoints-Trace160[`++Trace160++`]] :Checkpoint160: pass:normal[xref:#Checkpoints-Checkpoint160[`++Checkpoint160++`]] :push: pass:normal[xref:#Checkpoints-push-struct-Checkpoints-Trace160-uint96-uint160-[`++push++`]] :lowerLookup: pass:normal[xref:#Checkpoints-lowerLookup-struct-Checkpoints-Trace160-uint96-[`++lowerLookup++`]] :upperLookup: pass:normal[xref:#Checkpoints-upperLookup-struct-Checkpoints-Trace160-uint96-[`++upperLookup++`]] :upperLookupRecent: pass:normal[xref:#Checkpoints-upperLookupRecent-struct-Checkpoints-Trace160-uint96-[`++upperLookupRecent++`]] :latest: pass:normal[xref:#Checkpoints-latest-struct-Checkpoints-Trace160-[`++latest++`]] :latestCheckpoint: pass:normal[xref:#Checkpoints-latestCheckpoint-struct-Checkpoints-Trace160-[`++latestCheckpoint++`]] :length: pass:normal[xref:#Checkpoints-length-struct-Checkpoints-Trace160-[`++length++`]] :at: pass:normal[xref:#Checkpoints-at-struct-Checkpoints-Trace160-uint32-[`++at++`]] [.contract] [[Checkpoints]] === `++Checkpoints++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/Checkpoints.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/Checkpoints.sol"; ``` This library defines the `Trace*` struct, for checkpointing values as they change at different points in time, and later looking up past values by block number. See {Votes} as an example. To create a history of checkpoints define a variable type `Checkpoints.Trace*` in your contract, and store a new checkpoint for the current transaction block using the {push} function. [.contract-index] .Functions -- * {xref-Checkpoints-push-struct-Checkpoints-Trace224-uint32-uint224-}[`++push(self, key, value)++`] * {xref-Checkpoints-lowerLookup-struct-Checkpoints-Trace224-uint32-}[`++lowerLookup(self, key)++`] * {xref-Checkpoints-upperLookup-struct-Checkpoints-Trace224-uint32-}[`++upperLookup(self, key)++`] * {xref-Checkpoints-upperLookupRecent-struct-Checkpoints-Trace224-uint32-}[`++upperLookupRecent(self, key)++`] * {xref-Checkpoints-latest-struct-Checkpoints-Trace224-}[`++latest(self)++`] * {xref-Checkpoints-latestCheckpoint-struct-Checkpoints-Trace224-}[`++latestCheckpoint(self)++`] * {xref-Checkpoints-length-struct-Checkpoints-Trace224-}[`++length(self)++`] * {xref-Checkpoints-at-struct-Checkpoints-Trace224-uint32-}[`++at(self, pos)++`] * {xref-Checkpoints-push-struct-Checkpoints-Trace208-uint48-uint208-}[`++push(self, key, value)++`] * {xref-Checkpoints-lowerLookup-struct-Checkpoints-Trace208-uint48-}[`++lowerLookup(self, key)++`] * {xref-Checkpoints-upperLookup-struct-Checkpoints-Trace208-uint48-}[`++upperLookup(self, key)++`] * {xref-Checkpoints-upperLookupRecent-struct-Checkpoints-Trace208-uint48-}[`++upperLookupRecent(self, key)++`] * {xref-Checkpoints-latest-struct-Checkpoints-Trace208-}[`++latest(self)++`] * {xref-Checkpoints-latestCheckpoint-struct-Checkpoints-Trace208-}[`++latestCheckpoint(self)++`] * {xref-Checkpoints-length-struct-Checkpoints-Trace208-}[`++length(self)++`] * {xref-Checkpoints-at-struct-Checkpoints-Trace208-uint32-}[`++at(self, pos)++`] * {xref-Checkpoints-push-struct-Checkpoints-Trace160-uint96-uint160-}[`++push(self, key, value)++`] * {xref-Checkpoints-lowerLookup-struct-Checkpoints-Trace160-uint96-}[`++lowerLookup(self, key)++`] * {xref-Checkpoints-upperLookup-struct-Checkpoints-Trace160-uint96-}[`++upperLookup(self, key)++`] * {xref-Checkpoints-upperLookupRecent-struct-Checkpoints-Trace160-uint96-}[`++upperLookupRecent(self, key)++`] * {xref-Checkpoints-latest-struct-Checkpoints-Trace160-}[`++latest(self)++`] * {xref-Checkpoints-latestCheckpoint-struct-Checkpoints-Trace160-}[`++latestCheckpoint(self)++`] * {xref-Checkpoints-length-struct-Checkpoints-Trace160-}[`++length(self)++`] * {xref-Checkpoints-at-struct-Checkpoints-Trace160-uint32-}[`++at(self, pos)++`] -- [.contract-index] .Errors -- * {xref-Checkpoints-CheckpointUnorderedInsertion--}[`++CheckpointUnorderedInsertion()++`] -- [.contract-item] [[Checkpoints-push-struct-Checkpoints-Trace224-uint32-uint224-]] ==== `[.contract-item-name]#++push++#++(struct Checkpoints.Trace224 self, uint32 key, uint224 value) → uint224 oldValue, uint224 newValue++` [.item-kind]#internal# Pushes a (`key`, `value`) pair into a Trace224 so that it is stored as the checkpoint. Returns previous value and new value. IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint32).max` key set will disable the library. [.contract-item] [[Checkpoints-lowerLookup-struct-Checkpoints-Trace224-uint32-]] ==== `[.contract-item-name]#++lowerLookup++#++(struct Checkpoints.Trace224 self, uint32 key) → uint224++` [.item-kind]#internal# Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookup-struct-Checkpoints-Trace224-uint32-]] ==== `[.contract-item-name]#++upperLookup++#++(struct Checkpoints.Trace224 self, uint32 key) → uint224++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookupRecent-struct-Checkpoints-Trace224-uint32-]] ==== `[.contract-item-name]#++upperLookupRecent++#++(struct Checkpoints.Trace224 self, uint32 key) → uint224++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high keys). [.contract-item] [[Checkpoints-latest-struct-Checkpoints-Trace224-]] ==== `[.contract-item-name]#++latest++#++(struct Checkpoints.Trace224 self) → uint224++` [.item-kind]#internal# Returns the value in the most recent checkpoint, or zero if there are no checkpoints. [.contract-item] [[Checkpoints-latestCheckpoint-struct-Checkpoints-Trace224-]] ==== `[.contract-item-name]#++latestCheckpoint++#++(struct Checkpoints.Trace224 self) → bool exists, uint32 _key, uint224 _value++` [.item-kind]#internal# Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value in the most recent checkpoint. [.contract-item] [[Checkpoints-length-struct-Checkpoints-Trace224-]] ==== `[.contract-item-name]#++length++#++(struct Checkpoints.Trace224 self) → uint256++` [.item-kind]#internal# Returns the number of checkpoint. [.contract-item] [[Checkpoints-at-struct-Checkpoints-Trace224-uint32-]] ==== `[.contract-item-name]#++at++#++(struct Checkpoints.Trace224 self, uint32 pos) → struct Checkpoints.Checkpoint224++` [.item-kind]#internal# Returns checkpoint at given position. [.contract-item] [[Checkpoints-push-struct-Checkpoints-Trace208-uint48-uint208-]] ==== `[.contract-item-name]#++push++#++(struct Checkpoints.Trace208 self, uint48 key, uint208 value) → uint208 oldValue, uint208 newValue++` [.item-kind]#internal# Pushes a (`key`, `value`) pair into a Trace208 so that it is stored as the checkpoint. Returns previous value and new value. IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint48).max` key set will disable the library. [.contract-item] [[Checkpoints-lowerLookup-struct-Checkpoints-Trace208-uint48-]] ==== `[.contract-item-name]#++lowerLookup++#++(struct Checkpoints.Trace208 self, uint48 key) → uint208++` [.item-kind]#internal# Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookup-struct-Checkpoints-Trace208-uint48-]] ==== `[.contract-item-name]#++upperLookup++#++(struct Checkpoints.Trace208 self, uint48 key) → uint208++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookupRecent-struct-Checkpoints-Trace208-uint48-]] ==== `[.contract-item-name]#++upperLookupRecent++#++(struct Checkpoints.Trace208 self, uint48 key) → uint208++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high keys). [.contract-item] [[Checkpoints-latest-struct-Checkpoints-Trace208-]] ==== `[.contract-item-name]#++latest++#++(struct Checkpoints.Trace208 self) → uint208++` [.item-kind]#internal# Returns the value in the most recent checkpoint, or zero if there are no checkpoints. [.contract-item] [[Checkpoints-latestCheckpoint-struct-Checkpoints-Trace208-]] ==== `[.contract-item-name]#++latestCheckpoint++#++(struct Checkpoints.Trace208 self) → bool exists, uint48 _key, uint208 _value++` [.item-kind]#internal# Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value in the most recent checkpoint. [.contract-item] [[Checkpoints-length-struct-Checkpoints-Trace208-]] ==== `[.contract-item-name]#++length++#++(struct Checkpoints.Trace208 self) → uint256++` [.item-kind]#internal# Returns the number of checkpoint. [.contract-item] [[Checkpoints-at-struct-Checkpoints-Trace208-uint32-]] ==== `[.contract-item-name]#++at++#++(struct Checkpoints.Trace208 self, uint32 pos) → struct Checkpoints.Checkpoint208++` [.item-kind]#internal# Returns checkpoint at given position. [.contract-item] [[Checkpoints-push-struct-Checkpoints-Trace160-uint96-uint160-]] ==== `[.contract-item-name]#++push++#++(struct Checkpoints.Trace160 self, uint96 key, uint160 value) → uint160 oldValue, uint160 newValue++` [.item-kind]#internal# Pushes a (`key`, `value`) pair into a Trace160 so that it is stored as the checkpoint. Returns previous value and new value. IMPORTANT: Never accept `key` as a user input, since an arbitrary `type(uint96).max` key set will disable the library. [.contract-item] [[Checkpoints-lowerLookup-struct-Checkpoints-Trace160-uint96-]] ==== `[.contract-item-name]#++lowerLookup++#++(struct Checkpoints.Trace160 self, uint96 key) → uint160++` [.item-kind]#internal# Returns the value in the first (oldest) checkpoint with key greater or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookup-struct-Checkpoints-Trace160-uint96-]] ==== `[.contract-item-name]#++upperLookup++#++(struct Checkpoints.Trace160 self, uint96 key) → uint160++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. [.contract-item] [[Checkpoints-upperLookupRecent-struct-Checkpoints-Trace160-uint96-]] ==== `[.contract-item-name]#++upperLookupRecent++#++(struct Checkpoints.Trace160 self, uint96 key) → uint160++` [.item-kind]#internal# Returns the value in the last (most recent) checkpoint with key lower or equal than the search key, or zero if there is none. NOTE: This is a variant of {upperLookup} that is optimised to find "recent" checkpoint (checkpoints with high keys). [.contract-item] [[Checkpoints-latest-struct-Checkpoints-Trace160-]] ==== `[.contract-item-name]#++latest++#++(struct Checkpoints.Trace160 self) → uint160++` [.item-kind]#internal# Returns the value in the most recent checkpoint, or zero if there are no checkpoints. [.contract-item] [[Checkpoints-latestCheckpoint-struct-Checkpoints-Trace160-]] ==== `[.contract-item-name]#++latestCheckpoint++#++(struct Checkpoints.Trace160 self) → bool exists, uint96 _key, uint160 _value++` [.item-kind]#internal# Returns whether there is a checkpoint in the structure (i.e. it is not empty), and if so the key and value in the most recent checkpoint. [.contract-item] [[Checkpoints-length-struct-Checkpoints-Trace160-]] ==== `[.contract-item-name]#++length++#++(struct Checkpoints.Trace160 self) → uint256++` [.item-kind]#internal# Returns the number of checkpoint. [.contract-item] [[Checkpoints-at-struct-Checkpoints-Trace160-uint32-]] ==== `[.contract-item-name]#++at++#++(struct Checkpoints.Trace160 self, uint32 pos) → struct Checkpoints.Checkpoint160++` [.item-kind]#internal# Returns checkpoint at given position. [.contract-item] [[Checkpoints-CheckpointUnorderedInsertion--]] ==== `[.contract-item-name]#++CheckpointUnorderedInsertion++#++()++` [.item-kind]#error# A value was attempted to be inserted on a past checkpoint. :Uint256Heap: pass:normal[xref:#Heap-Uint256Heap[`++Uint256Heap++`]] :peek: pass:normal[xref:#Heap-peek-struct-Heap-Uint256Heap-[`++peek++`]] :pop: pass:normal[xref:#Heap-pop-struct-Heap-Uint256Heap-[`++pop++`]] :pop: pass:normal[xref:#Heap-pop-struct-Heap-Uint256Heap-function--uint256-uint256--view-returns--bool--[`++pop++`]] :insert: pass:normal[xref:#Heap-insert-struct-Heap-Uint256Heap-uint256-[`++insert++`]] :insert: pass:normal[xref:#Heap-insert-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--[`++insert++`]] :replace: pass:normal[xref:#Heap-replace-struct-Heap-Uint256Heap-uint256-[`++replace++`]] :replace: pass:normal[xref:#Heap-replace-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--[`++replace++`]] :length: pass:normal[xref:#Heap-length-struct-Heap-Uint256Heap-[`++length++`]] :clear: pass:normal[xref:#Heap-clear-struct-Heap-Uint256Heap-[`++clear++`]] [.contract] [[Heap]] === `++Heap++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/Heap.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/Heap.sol"; ``` Library for managing https://en.wikipedia.org/wiki/Binary_heap[binary heap] that can be used as https://en.wikipedia.org/wiki/Priority_queue[priority queue]. Heaps are represented as a tree of values where the first element (index 0) is the root, and where the node at index i is the child of the node at index (i-1)/2 and the parent of nodes at index 2*i+1 and 2*i+2. Each node stores an element of the heap. The structure is ordered so that each node is bigger than its parent. An immediate consequence is that the highest priority value is the one at the root. This value can be looked up in constant time (O(1)) at `heap.tree[0]` The structure is designed to perform the following operations with the corresponding complexities: * peek (get the highest priority value): O(1) * insert (insert a value): O(log(n)) * pop (remove the highest priority value): O(log(n)) * replace (replace the highest priority value with a new value): O(log(n)) * length (get the number of elements): O(1) * clear (remove all elements): O(1) IMPORTANT: This library allows for the use of custom comparator functions. Given that manipulating memory can lead to unexpected behavior. Consider verifying that the comparator does not manipulate the Heap's state directly and that it follows the Solidity memory safety rules. _Available since v5.1._ [.contract-index] .Functions -- * {xref-Heap-peek-struct-Heap-Uint256Heap-}[`++peek(self)++`] * {xref-Heap-pop-struct-Heap-Uint256Heap-}[`++pop(self)++`] * {xref-Heap-pop-struct-Heap-Uint256Heap-function--uint256-uint256--view-returns--bool--}[`++pop(self, comp)++`] * {xref-Heap-insert-struct-Heap-Uint256Heap-uint256-}[`++insert(self, value)++`] * {xref-Heap-insert-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--}[`++insert(self, value, comp)++`] * {xref-Heap-replace-struct-Heap-Uint256Heap-uint256-}[`++replace(self, newValue)++`] * {xref-Heap-replace-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--}[`++replace(self, newValue, comp)++`] * {xref-Heap-length-struct-Heap-Uint256Heap-}[`++length(self)++`] * {xref-Heap-clear-struct-Heap-Uint256Heap-}[`++clear(self)++`] -- [.contract-item] [[Heap-peek-struct-Heap-Uint256Heap-]] ==== `[.contract-item-name]#++peek++#++(struct Heap.Uint256Heap self) → uint256++` [.item-kind]#internal# Lookup the root element of the heap. [.contract-item] [[Heap-pop-struct-Heap-Uint256Heap-]] ==== `[.contract-item-name]#++pop++#++(struct Heap.Uint256Heap self) → uint256++` [.item-kind]#internal# Remove (and return) the root element for the heap using the default comparator. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-pop-struct-Heap-Uint256Heap-function--uint256-uint256--view-returns--bool--]] ==== `[.contract-item-name]#++pop++#++(struct Heap.Uint256Heap self, function (uint256,uint256) view returns (bool) comp) → uint256++` [.item-kind]#internal# Remove (and return) the root element for the heap using the provided comparator. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-insert-struct-Heap-Uint256Heap-uint256-]] ==== `[.contract-item-name]#++insert++#++(struct Heap.Uint256Heap self, uint256 value)++` [.item-kind]#internal# Insert a new element in the heap using the default comparator. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-insert-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--]] ==== `[.contract-item-name]#++insert++#++(struct Heap.Uint256Heap self, uint256 value, function (uint256,uint256) view returns (bool) comp)++` [.item-kind]#internal# Insert a new element in the heap using the provided comparator. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-replace-struct-Heap-Uint256Heap-uint256-]] ==== `[.contract-item-name]#++replace++#++(struct Heap.Uint256Heap self, uint256 newValue) → uint256++` [.item-kind]#internal# Return the root element for the heap, and replace it with a new value, using the default comparator. This is equivalent to using {pop} and {insert}, but requires only one rebalancing operation. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-replace-struct-Heap-Uint256Heap-uint256-function--uint256-uint256--view-returns--bool--]] ==== `[.contract-item-name]#++replace++#++(struct Heap.Uint256Heap self, uint256 newValue, function (uint256,uint256) view returns (bool) comp) → uint256++` [.item-kind]#internal# Return the root element for the heap, and replace it with a new value, using the provided comparator. This is equivalent to using {pop} and {insert}, but requires only one rebalancing operation. NOTE: All inserting and removal from a heap should always be done using the same comparator. Mixing comparator during the lifecycle of a heap will result in undefined behavior. [.contract-item] [[Heap-length-struct-Heap-Uint256Heap-]] ==== `[.contract-item-name]#++length++#++(struct Heap.Uint256Heap self) → uint256++` [.item-kind]#internal# Returns the number of elements in the heap. [.contract-item] [[Heap-clear-struct-Heap-Uint256Heap-]] ==== `[.contract-item-name]#++clear++#++(struct Heap.Uint256Heap self)++` [.item-kind]#internal# Removes all elements in the heap. :Bytes32PushTree: pass:normal[xref:#MerkleTree-Bytes32PushTree[`++Bytes32PushTree++`]] :setup: pass:normal[xref:#MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-[`++setup++`]] :setup: pass:normal[xref:#MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++setup++`]] :push: pass:normal[xref:#MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-[`++push++`]] :push: pass:normal[xref:#MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-function--bytes32-bytes32--view-returns--bytes32--[`++push++`]] :depth: pass:normal[xref:#MerkleTree-depth-struct-MerkleTree-Bytes32PushTree-[`++depth++`]] [.contract] [[MerkleTree]] === `++MerkleTree++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/structs/MerkleTree.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/structs/MerkleTree.sol"; ``` Library for managing https://wikipedia.org/wiki/Merkle_Tree[Merkle Tree] data structures. Each tree is a complete binary tree with the ability to sequentially insert leaves, changing them from a zero to a non-zero value and updating its root. This structure allows inserting commitments (or other entries) that are not stored, but can be proven to be part of the tree at a later time if the root is kept. See {MerkleProof}. A tree is defined by the following parameters: * Depth: The number of levels in the tree, it also defines the maximum number of leaves as 2**depth. * Zero value: The value that represents an empty leaf. Used to avoid regular zero values to be part of the tree. * Hashing function: A cryptographic hash function used to produce internal nodes. Defaults to {Hashes-commutativeKeccak256}. NOTE: Building trees using non-commutative hashing functions (i.e. `H(a, b) != H(b, a)`) is supported. However, proving the inclusion of a leaf in such trees is not possible with the {MerkleProof} library since it only supports _commutative_ hashing functions. _Available since v5.1._ [.contract-index] .Functions -- * {xref-MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-}[`++setup(self, treeDepth, zero)++`] * {xref-MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++setup(self, treeDepth, zero, fnHash)++`] * {xref-MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-}[`++push(self, leaf)++`] * {xref-MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-function--bytes32-bytes32--view-returns--bytes32--}[`++push(self, leaf, fnHash)++`] * {xref-MerkleTree-depth-struct-MerkleTree-Bytes32PushTree-}[`++depth(self)++`] -- [.contract-item] [[MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-]] ==== `[.contract-item-name]#++setup++#++(struct MerkleTree.Bytes32PushTree self, uint8 treeDepth, bytes32 zero) → bytes32 initialRoot++` [.item-kind]#internal# Initialize a {Bytes32PushTree} using {Hashes-commutativeKeccak256} to hash internal nodes. The capacity of the tree (i.e. number of leaves) is set to `2**treeDepth`. Calling this function on MerkleTree that was already setup and used will reset it to a blank state. Once a tree is setup, any push to it must use the same hashing function. This means that values should be pushed to it using the default {xref-MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-}[push] function. IMPORTANT: The zero value should be carefully chosen since it will be stored in the tree representing empty leaves. It should be a value that is not expected to be part of the tree. [.contract-item] [[MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++setup++#++(struct MerkleTree.Bytes32PushTree self, uint8 treeDepth, bytes32 zero, function (bytes32,bytes32) view returns (bytes32) fnHash) → bytes32 initialRoot++` [.item-kind]#internal# Same as {xref-MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-}[setup], but allows to specify a custom hashing function. Once a tree is setup, any push to it must use the same hashing function. This means that values should be pushed to it using the custom push function, which should be the same one as used during the setup. IMPORTANT: Providing a custom hashing function is a security-sensitive operation since it may compromise the soundness of the tree. NOTE: Consider verifying that the hashing function does not manipulate the memory state directly and that it follows the Solidity memory safety rules. Otherwise, it may lead to unexpected behavior. [.contract-item] [[MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-]] ==== `[.contract-item-name]#++push++#++(struct MerkleTree.Bytes32PushTree self, bytes32 leaf) → uint256 index, bytes32 newRoot++` [.item-kind]#internal# Insert a new leaf in the tree, and compute the new root. Returns the position of the inserted leaf in the tree, and the resulting root. Hashing the leaf before calling this function is recommended as a protection against second pre-image attacks. This variant uses {Hashes-commutativeKeccak256} to hash internal nodes. It should only be used on merkle trees that were setup using the same (default) hashing function (i.e. by calling {xref-MerkleTree-setup-struct-MerkleTree-Bytes32PushTree-uint8-bytes32-}[the default setup] function). [.contract-item] [[MerkleTree-push-struct-MerkleTree-Bytes32PushTree-bytes32-function--bytes32-bytes32--view-returns--bytes32--]] ==== `[.contract-item-name]#++push++#++(struct MerkleTree.Bytes32PushTree self, bytes32 leaf, function (bytes32,bytes32) view returns (bytes32) fnHash) → uint256 index, bytes32 newRoot++` [.item-kind]#internal# Insert a new leaf in the tree, and compute the new root. Returns the position of the inserted leaf in the tree, and the resulting root. Hashing the leaf before calling this function is recommended as a protection against second pre-image attacks. This variant uses a custom hashing function to hash internal nodes. It should only be called with the same function as the one used during the initial setup of the merkle tree. [.contract-item] [[MerkleTree-depth-struct-MerkleTree-Bytes32PushTree-]] ==== `[.contract-item-name]#++depth++#++(struct MerkleTree.Bytes32PushTree self) → uint256++` [.item-kind]#internal# Tree's depth (set at initialization) == Libraries :Create2EmptyBytecode: pass:normal[xref:#Create2-Create2EmptyBytecode--[`++Create2EmptyBytecode++`]] :deploy: pass:normal[xref:#Create2-deploy-uint256-bytes32-bytes-[`++deploy++`]] :computeAddress: pass:normal[xref:#Create2-computeAddress-bytes32-bytes32-[`++computeAddress++`]] :computeAddress: pass:normal[xref:#Create2-computeAddress-bytes32-bytes32-address-[`++computeAddress++`]] [.contract] [[Create2]] === `++Create2++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Create2.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Create2.sol"; ``` Helper to make usage of the `CREATE2` EVM opcode easier and safer. `CREATE2` can be used to compute in advance the address where a smart contract will be deployed, which allows for interesting new mechanisms known as 'counterfactual interactions'. See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more information. [.contract-index] .Functions -- * {xref-Create2-deploy-uint256-bytes32-bytes-}[`++deploy(amount, salt, bytecode)++`] * {xref-Create2-computeAddress-bytes32-bytes32-}[`++computeAddress(salt, bytecodeHash)++`] * {xref-Create2-computeAddress-bytes32-bytes32-address-}[`++computeAddress(salt, bytecodeHash, deployer)++`] -- [.contract-index] .Errors -- * {xref-Create2-Create2EmptyBytecode--}[`++Create2EmptyBytecode()++`] -- [.contract-item] [[Create2-deploy-uint256-bytes32-bytes-]] ==== `[.contract-item-name]#++deploy++#++(uint256 amount, bytes32 salt, bytes bytecode) → address addr++` [.item-kind]#internal# Deploys a contract using `CREATE2`. The address where the contract will be deployed can be known in advance via {computeAddress}. The bytecode for a contract can be obtained from Solidity with `type(contractName).creationCode`. Requirements: - `bytecode` must not be empty. - `salt` must have not been used for `bytecode` already. - the factory must have a balance of at least `amount`. - if `amount` is non-zero, `bytecode` must have a `payable` constructor. [.contract-item] [[Create2-computeAddress-bytes32-bytes32-]] ==== `[.contract-item-name]#++computeAddress++#++(bytes32 salt, bytes32 bytecodeHash) → address++` [.item-kind]#internal# Returns the address where a contract will be stored if deployed via {deploy}. Any change in the `bytecodeHash` or `salt` will result in a new destination address. [.contract-item] [[Create2-computeAddress-bytes32-bytes32-address-]] ==== `[.contract-item-name]#++computeAddress++#++(bytes32 salt, bytes32 bytecodeHash, address deployer) → address addr++` [.item-kind]#internal# Returns the address where a contract will be stored if deployed via {deploy} from a contract located at `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}. [.contract-item] [[Create2-Create2EmptyBytecode--]] ==== `[.contract-item-name]#++Create2EmptyBytecode++#++()++` [.item-kind]#error# There's no code to deploy. :AddressEmptyCode: pass:normal[xref:#Address-AddressEmptyCode-address-[`++AddressEmptyCode++`]] :sendValue: pass:normal[xref:#Address-sendValue-address-payable-uint256-[`++sendValue++`]] :functionCall: pass:normal[xref:#Address-functionCall-address-bytes-[`++functionCall++`]] :functionCallWithValue: pass:normal[xref:#Address-functionCallWithValue-address-bytes-uint256-[`++functionCallWithValue++`]] :functionStaticCall: pass:normal[xref:#Address-functionStaticCall-address-bytes-[`++functionStaticCall++`]] :functionDelegateCall: pass:normal[xref:#Address-functionDelegateCall-address-bytes-[`++functionDelegateCall++`]] :verifyCallResultFromTarget: pass:normal[xref:#Address-verifyCallResultFromTarget-address-bool-bytes-[`++verifyCallResultFromTarget++`]] :verifyCallResult: pass:normal[xref:#Address-verifyCallResult-bool-bytes-[`++verifyCallResult++`]] [.contract] [[Address]] === `++Address++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Address.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Address.sol"; ``` Collection of functions related to the address type [.contract-index] .Functions -- * {xref-Address-sendValue-address-payable-uint256-}[`++sendValue(recipient, amount)++`] * {xref-Address-functionCall-address-bytes-}[`++functionCall(target, data)++`] * {xref-Address-functionCallWithValue-address-bytes-uint256-}[`++functionCallWithValue(target, data, value)++`] * {xref-Address-functionStaticCall-address-bytes-}[`++functionStaticCall(target, data)++`] * {xref-Address-functionDelegateCall-address-bytes-}[`++functionDelegateCall(target, data)++`] * {xref-Address-verifyCallResultFromTarget-address-bool-bytes-}[`++verifyCallResultFromTarget(target, success, returndata)++`] * {xref-Address-verifyCallResult-bool-bytes-}[`++verifyCallResult(success, returndata)++`] -- [.contract-index] .Errors -- * {xref-Address-AddressEmptyCode-address-}[`++AddressEmptyCode(target)++`] -- [.contract-item] [[Address-sendValue-address-payable-uint256-]] ==== `[.contract-item-name]#++sendValue++#++(address payable recipient, uint256 amount)++` [.item-kind]#internal# Replacement for Solidity's `transfer`: sends `amount` wei to `recipient`, forwarding all available gas and reverting on errors. https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost of certain opcodes, possibly making contracts go over the 2300 gas limit imposed by `transfer`, making them unable to receive funds via `transfer`. {sendValue} removes this limitation. https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. IMPORTANT: because control is transferred to `recipient`, care must be taken to not create reentrancy vulnerabilities. Consider using {ReentrancyGuard} or the https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. [.contract-item] [[Address-functionCall-address-bytes-]] ==== `[.contract-item-name]#++functionCall++#++(address target, bytes data) → bytes++` [.item-kind]#internal# Performs a Solidity function call using a low level `call`. A plain `call` is an unsafe replacement for a function call: use this function instead. If `target` reverts with a revert reason or custom error, it is bubbled up by this function (like regular Solidity function calls). However, if the call reverted with no returned reason, this function reverts with a {Errors.FailedCall} error. Returns the raw returned data. To convert to the expected return value, use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. Requirements: - `target` must be a contract. - calling `target` with `data` must not revert. [.contract-item] [[Address-functionCallWithValue-address-bytes-uint256-]] ==== `[.contract-item-name]#++functionCallWithValue++#++(address target, bytes data, uint256 value) → bytes++` [.item-kind]#internal# Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but also transferring `value` wei to `target`. Requirements: - the calling contract must have an ETH balance of at least `value`. - the called Solidity function must be `payable`. [.contract-item] [[Address-functionStaticCall-address-bytes-]] ==== `[.contract-item-name]#++functionStaticCall++#++(address target, bytes data) → bytes++` [.item-kind]#internal# Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but performing a static call. [.contract-item] [[Address-functionDelegateCall-address-bytes-]] ==== `[.contract-item-name]#++functionDelegateCall++#++(address target, bytes data) → bytes++` [.item-kind]#internal# Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but performing a delegate call. [.contract-item] [[Address-verifyCallResultFromTarget-address-bool-bytes-]] ==== `[.contract-item-name]#++verifyCallResultFromTarget++#++(address target, bool success, bytes returndata) → bytes++` [.item-kind]#internal# Tool to verify that a low level call to smart-contract was successful, and reverts if the target was not a contract or bubbling up the revert reason (falling back to {Errors.FailedCall}) in case of an unsuccessful call. [.contract-item] [[Address-verifyCallResult-bool-bytes-]] ==== `[.contract-item-name]#++verifyCallResult++#++(bool success, bytes returndata) → bytes++` [.item-kind]#internal# Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the revert reason or with a default {Errors.FailedCall} error. [.contract-item] [[Address-AddressEmptyCode-address-]] ==== `[.contract-item-name]#++AddressEmptyCode++#++(address target)++` [.item-kind]#error# There's no code at `target` (it is not a contract). :sort: pass:normal[xref:#Arrays-sort-uint256---function--uint256-uint256--pure-returns--bool--[`++sort++`]] :sort: pass:normal[xref:#Arrays-sort-uint256---[`++sort++`]] :sort: pass:normal[xref:#Arrays-sort-address---function--address-address--pure-returns--bool--[`++sort++`]] :sort: pass:normal[xref:#Arrays-sort-address---[`++sort++`]] :sort: pass:normal[xref:#Arrays-sort-bytes32---function--bytes32-bytes32--pure-returns--bool--[`++sort++`]] :sort: pass:normal[xref:#Arrays-sort-bytes32---[`++sort++`]] :findUpperBound: pass:normal[xref:#Arrays-findUpperBound-uint256---uint256-[`++findUpperBound++`]] :lowerBound: pass:normal[xref:#Arrays-lowerBound-uint256---uint256-[`++lowerBound++`]] :upperBound: pass:normal[xref:#Arrays-upperBound-uint256---uint256-[`++upperBound++`]] :lowerBoundMemory: pass:normal[xref:#Arrays-lowerBoundMemory-uint256---uint256-[`++lowerBoundMemory++`]] :upperBoundMemory: pass:normal[xref:#Arrays-upperBoundMemory-uint256---uint256-[`++upperBoundMemory++`]] :unsafeAccess: pass:normal[xref:#Arrays-unsafeAccess-address---uint256-[`++unsafeAccess++`]] :unsafeAccess: pass:normal[xref:#Arrays-unsafeAccess-bytes32---uint256-[`++unsafeAccess++`]] :unsafeAccess: pass:normal[xref:#Arrays-unsafeAccess-uint256---uint256-[`++unsafeAccess++`]] :unsafeMemoryAccess: pass:normal[xref:#Arrays-unsafeMemoryAccess-address---uint256-[`++unsafeMemoryAccess++`]] :unsafeMemoryAccess: pass:normal[xref:#Arrays-unsafeMemoryAccess-bytes32---uint256-[`++unsafeMemoryAccess++`]] :unsafeMemoryAccess: pass:normal[xref:#Arrays-unsafeMemoryAccess-uint256---uint256-[`++unsafeMemoryAccess++`]] :unsafeSetLength: pass:normal[xref:#Arrays-unsafeSetLength-address---uint256-[`++unsafeSetLength++`]] :unsafeSetLength: pass:normal[xref:#Arrays-unsafeSetLength-bytes32---uint256-[`++unsafeSetLength++`]] :unsafeSetLength: pass:normal[xref:#Arrays-unsafeSetLength-uint256---uint256-[`++unsafeSetLength++`]] [.contract] [[Arrays]] === `++Arrays++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Arrays.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Arrays.sol"; ``` Collection of functions related to array types. [.contract-index] .Functions -- * {xref-Arrays-sort-uint256---function--uint256-uint256--pure-returns--bool--}[`++sort(array, comp)++`] * {xref-Arrays-sort-uint256---}[`++sort(array)++`] * {xref-Arrays-sort-address---function--address-address--pure-returns--bool--}[`++sort(array, comp)++`] * {xref-Arrays-sort-address---}[`++sort(array)++`] * {xref-Arrays-sort-bytes32---function--bytes32-bytes32--pure-returns--bool--}[`++sort(array, comp)++`] * {xref-Arrays-sort-bytes32---}[`++sort(array)++`] * {xref-Arrays-findUpperBound-uint256---uint256-}[`++findUpperBound(array, element)++`] * {xref-Arrays-lowerBound-uint256---uint256-}[`++lowerBound(array, element)++`] * {xref-Arrays-upperBound-uint256---uint256-}[`++upperBound(array, element)++`] * {xref-Arrays-lowerBoundMemory-uint256---uint256-}[`++lowerBoundMemory(array, element)++`] * {xref-Arrays-upperBoundMemory-uint256---uint256-}[`++upperBoundMemory(array, element)++`] * {xref-Arrays-unsafeAccess-address---uint256-}[`++unsafeAccess(arr, pos)++`] * {xref-Arrays-unsafeAccess-bytes32---uint256-}[`++unsafeAccess(arr, pos)++`] * {xref-Arrays-unsafeAccess-uint256---uint256-}[`++unsafeAccess(arr, pos)++`] * {xref-Arrays-unsafeMemoryAccess-address---uint256-}[`++unsafeMemoryAccess(arr, pos)++`] * {xref-Arrays-unsafeMemoryAccess-bytes32---uint256-}[`++unsafeMemoryAccess(arr, pos)++`] * {xref-Arrays-unsafeMemoryAccess-uint256---uint256-}[`++unsafeMemoryAccess(arr, pos)++`] * {xref-Arrays-unsafeSetLength-address---uint256-}[`++unsafeSetLength(array, len)++`] * {xref-Arrays-unsafeSetLength-bytes32---uint256-}[`++unsafeSetLength(array, len)++`] * {xref-Arrays-unsafeSetLength-uint256---uint256-}[`++unsafeSetLength(array, len)++`] -- [.contract-item] [[Arrays-sort-uint256---function--uint256-uint256--pure-returns--bool--]] ==== `[.contract-item-name]#++sort++#++(uint256[] array, function (uint256,uint256) pure returns (bool) comp) → uint256[]++` [.item-kind]#internal# Sort an array of uint256 (in memory) following the provided comparator function. This function does the sorting "in place", meaning that it overrides the input. The object is returned for convenience, but that returned value can be discarded safely if the caller has a memory pointer to the array. NOTE: this function's cost is `O(n · log(n))` in average and `O(n²)` in the worst case, with n the length of the array. Using it in view functions that are executed through `eth_call` is safe, but one should be very careful when executing this as part of a transaction. If the array being sorted is too large, the sort operation may consume more gas than is available in a block, leading to potential DoS. IMPORTANT: Consider memory side-effects when using custom comparator functions that access memory in an unsafe way. [.contract-item] [[Arrays-sort-uint256---]] ==== `[.contract-item-name]#++sort++#++(uint256[] array) → uint256[]++` [.item-kind]#internal# Variant of {sort} that sorts an array of uint256 in increasing order. [.contract-item] [[Arrays-sort-address---function--address-address--pure-returns--bool--]] ==== `[.contract-item-name]#++sort++#++(address[] array, function (address,address) pure returns (bool) comp) → address[]++` [.item-kind]#internal# Sort an array of address (in memory) following the provided comparator function. This function does the sorting "in place", meaning that it overrides the input. The object is returned for convenience, but that returned value can be discarded safely if the caller has a memory pointer to the array. NOTE: this function's cost is `O(n · log(n))` in average and `O(n²)` in the worst case, with n the length of the array. Using it in view functions that are executed through `eth_call` is safe, but one should be very careful when executing this as part of a transaction. If the array being sorted is too large, the sort operation may consume more gas than is available in a block, leading to potential DoS. IMPORTANT: Consider memory side-effects when using custom comparator functions that access memory in an unsafe way. [.contract-item] [[Arrays-sort-address---]] ==== `[.contract-item-name]#++sort++#++(address[] array) → address[]++` [.item-kind]#internal# Variant of {sort} that sorts an array of address in increasing order. [.contract-item] [[Arrays-sort-bytes32---function--bytes32-bytes32--pure-returns--bool--]] ==== `[.contract-item-name]#++sort++#++(bytes32[] array, function (bytes32,bytes32) pure returns (bool) comp) → bytes32[]++` [.item-kind]#internal# Sort an array of bytes32 (in memory) following the provided comparator function. This function does the sorting "in place", meaning that it overrides the input. The object is returned for convenience, but that returned value can be discarded safely if the caller has a memory pointer to the array. NOTE: this function's cost is `O(n · log(n))` in average and `O(n²)` in the worst case, with n the length of the array. Using it in view functions that are executed through `eth_call` is safe, but one should be very careful when executing this as part of a transaction. If the array being sorted is too large, the sort operation may consume more gas than is available in a block, leading to potential DoS. IMPORTANT: Consider memory side-effects when using custom comparator functions that access memory in an unsafe way. [.contract-item] [[Arrays-sort-bytes32---]] ==== `[.contract-item-name]#++sort++#++(bytes32[] array) → bytes32[]++` [.item-kind]#internal# Variant of {sort} that sorts an array of bytes32 in increasing order. [.contract-item] [[Arrays-findUpperBound-uint256---uint256-]] ==== `[.contract-item-name]#++findUpperBound++#++(uint256[] array, uint256 element) → uint256++` [.item-kind]#internal# Searches a sorted `array` and returns the first index that contains a value greater or equal to `element`. If no such index exists (i.e. all values in the array are strictly less than `element`), the array length is returned. Time complexity O(log n). NOTE: The `array` is expected to be sorted in ascending order, and to contain no repeated elements. IMPORTANT: Deprecated. This implementation behaves as {lowerBound} but lacks support for repeated elements in the array. The {lowerBound} function should be used instead. [.contract-item] [[Arrays-lowerBound-uint256---uint256-]] ==== `[.contract-item-name]#++lowerBound++#++(uint256[] array, uint256 element) → uint256++` [.item-kind]#internal# Searches an `array` sorted in ascending order and returns the first index that contains a value greater or equal than `element`. If no such index exists (i.e. all values in the array are strictly less than `element`), the array length is returned. Time complexity O(log n). See C++'s https://en.cppreference.com/w/cpp/algorithm/lower_bound[lower_bound]. [.contract-item] [[Arrays-upperBound-uint256---uint256-]] ==== `[.contract-item-name]#++upperBound++#++(uint256[] array, uint256 element) → uint256++` [.item-kind]#internal# Searches an `array` sorted in ascending order and returns the first index that contains a value strictly greater than `element`. If no such index exists (i.e. all values in the array are strictly less than `element`), the array length is returned. Time complexity O(log n). See C++'s https://en.cppreference.com/w/cpp/algorithm/upper_bound[upper_bound]. [.contract-item] [[Arrays-lowerBoundMemory-uint256---uint256-]] ==== `[.contract-item-name]#++lowerBoundMemory++#++(uint256[] array, uint256 element) → uint256++` [.item-kind]#internal# Same as {lowerBound}, but with an array in memory. [.contract-item] [[Arrays-upperBoundMemory-uint256---uint256-]] ==== `[.contract-item-name]#++upperBoundMemory++#++(uint256[] array, uint256 element) → uint256++` [.item-kind]#internal# Same as {upperBound}, but with an array in memory. [.contract-item] [[Arrays-unsafeAccess-address---uint256-]] ==== `[.contract-item-name]#++unsafeAccess++#++(address[] arr, uint256 pos) → struct StorageSlot.AddressSlot++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeAccess-bytes32---uint256-]] ==== `[.contract-item-name]#++unsafeAccess++#++(bytes32[] arr, uint256 pos) → struct StorageSlot.Bytes32Slot++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeAccess-uint256---uint256-]] ==== `[.contract-item-name]#++unsafeAccess++#++(uint256[] arr, uint256 pos) → struct StorageSlot.Uint256Slot++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeMemoryAccess-address---uint256-]] ==== `[.contract-item-name]#++unsafeMemoryAccess++#++(address[] arr, uint256 pos) → address res++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeMemoryAccess-bytes32---uint256-]] ==== `[.contract-item-name]#++unsafeMemoryAccess++#++(bytes32[] arr, uint256 pos) → bytes32 res++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeMemoryAccess-uint256---uint256-]] ==== `[.contract-item-name]#++unsafeMemoryAccess++#++(uint256[] arr, uint256 pos) → uint256 res++` [.item-kind]#internal# Access an array in an "unsafe" way. Skips solidity "index-out-of-range" check. WARNING: Only use if you are certain `pos` is lower than the array length. [.contract-item] [[Arrays-unsafeSetLength-address---uint256-]] ==== `[.contract-item-name]#++unsafeSetLength++#++(address[] array, uint256 len)++` [.item-kind]#internal# Helper to set the length of an dynamic array. Directly writing to `.length` is forbidden. WARNING: this does not clear elements if length is reduced, of initialize elements if length is increased. [.contract-item] [[Arrays-unsafeSetLength-bytes32---uint256-]] ==== `[.contract-item-name]#++unsafeSetLength++#++(bytes32[] array, uint256 len)++` [.item-kind]#internal# Helper to set the length of an dynamic array. Directly writing to `.length` is forbidden. WARNING: this does not clear elements if length is reduced, of initialize elements if length is increased. [.contract-item] [[Arrays-unsafeSetLength-uint256---uint256-]] ==== `[.contract-item-name]#++unsafeSetLength++#++(uint256[] array, uint256 len)++` [.item-kind]#internal# Helper to set the length of an dynamic array. Directly writing to `.length` is forbidden. WARNING: this does not clear elements if length is reduced, of initialize elements if length is increased. :_TABLE: pass:normal[xref:#Base64-_TABLE-string[`++_TABLE++`]] :_TABLE_URL: pass:normal[xref:#Base64-_TABLE_URL-string[`++_TABLE_URL++`]] :encode: pass:normal[xref:#Base64-encode-bytes-[`++encode++`]] :encodeURL: pass:normal[xref:#Base64-encodeURL-bytes-[`++encodeURL++`]] [.contract] [[Base64]] === `++Base64++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Base64.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Base64.sol"; ``` Provides a set of functions to operate with Base64 strings. [.contract-index] .Functions -- * {xref-Base64-encode-bytes-}[`++encode(data)++`] * {xref-Base64-encodeURL-bytes-}[`++encodeURL(data)++`] -- [.contract-index] .Internal Variables -- * {xref-Base64-_TABLE-string}[`++string constant _TABLE++`] * {xref-Base64-_TABLE_URL-string}[`++string constant _TABLE_URL++`] -- [.contract-item] [[Base64-encode-bytes-]] ==== `[.contract-item-name]#++encode++#++(bytes data) → string++` [.item-kind]#internal# Converts a `bytes` to its Bytes64 `string` representation. [.contract-item] [[Base64-encodeURL-bytes-]] ==== `[.contract-item-name]#++encodeURL++#++(bytes data) → string++` [.item-kind]#internal# Converts a `bytes` to its Bytes64Url `string` representation. Output is not padded with `=` as specified in https://www.rfc-editor.org/rfc/rfc4648[rfc4648]. [.contract-item] [[Base64-_TABLE-string]] ==== `string [.contract-item-name]#++_TABLE++#` [.item-kind]#internal constant# Base64 Encoding/Decoding Table See sections 4 and 5 of https://datatracker.ietf.org/doc/html/rfc4648 [.contract-item] [[Base64-_TABLE_URL-string]] ==== `string [.contract-item-name]#++_TABLE_URL++#` [.item-kind]#internal constant# :StringsInsufficientHexLength: pass:normal[xref:#Strings-StringsInsufficientHexLength-uint256-uint256-[`++StringsInsufficientHexLength++`]] :StringsInvalidChar: pass:normal[xref:#Strings-StringsInvalidChar--[`++StringsInvalidChar++`]] :StringsInvalidAddressFormat: pass:normal[xref:#Strings-StringsInvalidAddressFormat--[`++StringsInvalidAddressFormat++`]] :toString: pass:normal[xref:#Strings-toString-uint256-[`++toString++`]] :toStringSigned: pass:normal[xref:#Strings-toStringSigned-int256-[`++toStringSigned++`]] :toHexString: pass:normal[xref:#Strings-toHexString-uint256-[`++toHexString++`]] :toHexString: pass:normal[xref:#Strings-toHexString-uint256-uint256-[`++toHexString++`]] :toHexString: pass:normal[xref:#Strings-toHexString-address-[`++toHexString++`]] :toChecksumHexString: pass:normal[xref:#Strings-toChecksumHexString-address-[`++toChecksumHexString++`]] :equal: pass:normal[xref:#Strings-equal-string-string-[`++equal++`]] :parseUint: pass:normal[xref:#Strings-parseUint-string-[`++parseUint++`]] :parseUint: pass:normal[xref:#Strings-parseUint-string-uint256-uint256-[`++parseUint++`]] :tryParseUint: pass:normal[xref:#Strings-tryParseUint-string-[`++tryParseUint++`]] :tryParseUint: pass:normal[xref:#Strings-tryParseUint-string-uint256-uint256-[`++tryParseUint++`]] :parseInt: pass:normal[xref:#Strings-parseInt-string-[`++parseInt++`]] :parseInt: pass:normal[xref:#Strings-parseInt-string-uint256-uint256-[`++parseInt++`]] :tryParseInt: pass:normal[xref:#Strings-tryParseInt-string-[`++tryParseInt++`]] :tryParseInt: pass:normal[xref:#Strings-tryParseInt-string-uint256-uint256-[`++tryParseInt++`]] :parseHexUint: pass:normal[xref:#Strings-parseHexUint-string-[`++parseHexUint++`]] :parseHexUint: pass:normal[xref:#Strings-parseHexUint-string-uint256-uint256-[`++parseHexUint++`]] :tryParseHexUint: pass:normal[xref:#Strings-tryParseHexUint-string-[`++tryParseHexUint++`]] :tryParseHexUint: pass:normal[xref:#Strings-tryParseHexUint-string-uint256-uint256-[`++tryParseHexUint++`]] :parseAddress: pass:normal[xref:#Strings-parseAddress-string-[`++parseAddress++`]] :parseAddress: pass:normal[xref:#Strings-parseAddress-string-uint256-uint256-[`++parseAddress++`]] :tryParseAddress: pass:normal[xref:#Strings-tryParseAddress-string-[`++tryParseAddress++`]] :tryParseAddress: pass:normal[xref:#Strings-tryParseAddress-string-uint256-uint256-[`++tryParseAddress++`]] [.contract] [[Strings]] === `++Strings++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Strings.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Strings.sol"; ``` String operations. [.contract-index] .Functions -- * {xref-Strings-toString-uint256-}[`++toString(value)++`] * {xref-Strings-toStringSigned-int256-}[`++toStringSigned(value)++`] * {xref-Strings-toHexString-uint256-}[`++toHexString(value)++`] * {xref-Strings-toHexString-uint256-uint256-}[`++toHexString(value, length)++`] * {xref-Strings-toHexString-address-}[`++toHexString(addr)++`] * {xref-Strings-toChecksumHexString-address-}[`++toChecksumHexString(addr)++`] * {xref-Strings-equal-string-string-}[`++equal(a, b)++`] * {xref-Strings-parseUint-string-}[`++parseUint(input)++`] * {xref-Strings-parseUint-string-uint256-uint256-}[`++parseUint(input, begin, end)++`] * {xref-Strings-tryParseUint-string-}[`++tryParseUint(input)++`] * {xref-Strings-tryParseUint-string-uint256-uint256-}[`++tryParseUint(input, begin, end)++`] * {xref-Strings-parseInt-string-}[`++parseInt(input)++`] * {xref-Strings-parseInt-string-uint256-uint256-}[`++parseInt(input, begin, end)++`] * {xref-Strings-tryParseInt-string-}[`++tryParseInt(input)++`] * {xref-Strings-tryParseInt-string-uint256-uint256-}[`++tryParseInt(input, begin, end)++`] * {xref-Strings-parseHexUint-string-}[`++parseHexUint(input)++`] * {xref-Strings-parseHexUint-string-uint256-uint256-}[`++parseHexUint(input, begin, end)++`] * {xref-Strings-tryParseHexUint-string-}[`++tryParseHexUint(input)++`] * {xref-Strings-tryParseHexUint-string-uint256-uint256-}[`++tryParseHexUint(input, begin, end)++`] * {xref-Strings-parseAddress-string-}[`++parseAddress(input)++`] * {xref-Strings-parseAddress-string-uint256-uint256-}[`++parseAddress(input, begin, end)++`] * {xref-Strings-tryParseAddress-string-}[`++tryParseAddress(input)++`] * {xref-Strings-tryParseAddress-string-uint256-uint256-}[`++tryParseAddress(input, begin, end)++`] -- [.contract-index] .Errors -- * {xref-Strings-StringsInsufficientHexLength-uint256-uint256-}[`++StringsInsufficientHexLength(value, length)++`] * {xref-Strings-StringsInvalidChar--}[`++StringsInvalidChar()++`] * {xref-Strings-StringsInvalidAddressFormat--}[`++StringsInvalidAddressFormat()++`] -- [.contract-item] [[Strings-toString-uint256-]] ==== `[.contract-item-name]#++toString++#++(uint256 value) → string++` [.item-kind]#internal# Converts a `uint256` to its ASCII `string` decimal representation. [.contract-item] [[Strings-toStringSigned-int256-]] ==== `[.contract-item-name]#++toStringSigned++#++(int256 value) → string++` [.item-kind]#internal# Converts a `int256` to its ASCII `string` decimal representation. [.contract-item] [[Strings-toHexString-uint256-]] ==== `[.contract-item-name]#++toHexString++#++(uint256 value) → string++` [.item-kind]#internal# Converts a `uint256` to its ASCII `string` hexadecimal representation. [.contract-item] [[Strings-toHexString-uint256-uint256-]] ==== `[.contract-item-name]#++toHexString++#++(uint256 value, uint256 length) → string++` [.item-kind]#internal# Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. [.contract-item] [[Strings-toHexString-address-]] ==== `[.contract-item-name]#++toHexString++#++(address addr) → string++` [.item-kind]#internal# Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. [.contract-item] [[Strings-toChecksumHexString-address-]] ==== `[.contract-item-name]#++toChecksumHexString++#++(address addr) → string++` [.item-kind]#internal# Converts an `address` with fixed length of 20 bytes to its checksummed ASCII `string` hexadecimal representation, according to EIP-55. [.contract-item] [[Strings-equal-string-string-]] ==== `[.contract-item-name]#++equal++#++(string a, string b) → bool++` [.item-kind]#internal# Returns true if the two strings are equal. [.contract-item] [[Strings-parseUint-string-]] ==== `[.contract-item-name]#++parseUint++#++(string input) → uint256++` [.item-kind]#internal# Parse a decimal string and returns the value as a `uint256`. Requirements: - The string must be formatted as `[0-9]*` - The result must fit into an `uint256` type [.contract-item] [[Strings-parseUint-string-uint256-uint256-]] ==== `[.contract-item-name]#++parseUint++#++(string input, uint256 begin, uint256 end) → uint256++` [.item-kind]#internal# Variant of {parseUint} that parses a substring of `input` located between position `begin` (included) and `end` (excluded). Requirements: - The substring must be formatted as `[0-9]*` - The result must fit into an `uint256` type [.contract-item] [[Strings-tryParseUint-string-]] ==== `[.contract-item-name]#++tryParseUint++#++(string input) → bool success, uint256 value++` [.item-kind]#internal# Variant of {parseUint-string} that returns false if the parsing fails because of an invalid character. NOTE: This function will revert if the result does not fit in a `uint256`. [.contract-item] [[Strings-tryParseUint-string-uint256-uint256-]] ==== `[.contract-item-name]#++tryParseUint++#++(string input, uint256 begin, uint256 end) → bool success, uint256 value++` [.item-kind]#internal# Variant of {parseUint-string-uint256-uint256} that returns false if the parsing fails because of an invalid character. NOTE: This function will revert if the result does not fit in a `uint256`. [.contract-item] [[Strings-parseInt-string-]] ==== `[.contract-item-name]#++parseInt++#++(string input) → int256++` [.item-kind]#internal# Parse a decimal string and returns the value as a `int256`. Requirements: - The string must be formatted as `[-+]?[0-9]*` - The result must fit in an `int256` type. [.contract-item] [[Strings-parseInt-string-uint256-uint256-]] ==== `[.contract-item-name]#++parseInt++#++(string input, uint256 begin, uint256 end) → int256++` [.item-kind]#internal# Variant of {parseInt-string} that parses a substring of `input` located between position `begin` (included) and `end` (excluded). Requirements: - The substring must be formatted as `[-+]?[0-9]*` - The result must fit in an `int256` type. [.contract-item] [[Strings-tryParseInt-string-]] ==== `[.contract-item-name]#++tryParseInt++#++(string input) → bool success, int256 value++` [.item-kind]#internal# Variant of {parseInt-string} that returns false if the parsing fails because of an invalid character or if the result does not fit in a `int256`. NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`. [.contract-item] [[Strings-tryParseInt-string-uint256-uint256-]] ==== `[.contract-item-name]#++tryParseInt++#++(string input, uint256 begin, uint256 end) → bool success, int256 value++` [.item-kind]#internal# Variant of {parseInt-string-uint256-uint256} that returns false if the parsing fails because of an invalid character or if the result does not fit in a `int256`. NOTE: This function will revert if the absolute value of the result does not fit in a `uint256`. [.contract-item] [[Strings-parseHexUint-string-]] ==== `[.contract-item-name]#++parseHexUint++#++(string input) → uint256++` [.item-kind]#internal# Parse a hexadecimal string (with or without "0x" prefix), and returns the value as a `uint256`. Requirements: - The string must be formatted as `(0x)?[0-9a-fA-F]*` - The result must fit in an `uint256` type. [.contract-item] [[Strings-parseHexUint-string-uint256-uint256-]] ==== `[.contract-item-name]#++parseHexUint++#++(string input, uint256 begin, uint256 end) → uint256++` [.item-kind]#internal# Variant of {parseHexUint} that parses a substring of `input` located between position `begin` (included) and `end` (excluded). Requirements: - The substring must be formatted as `(0x)?[0-9a-fA-F]*` - The result must fit in an `uint256` type. [.contract-item] [[Strings-tryParseHexUint-string-]] ==== `[.contract-item-name]#++tryParseHexUint++#++(string input) → bool success, uint256 value++` [.item-kind]#internal# Variant of {parseHexUint-string} that returns false if the parsing fails because of an invalid character. NOTE: This function will revert if the result does not fit in a `uint256`. [.contract-item] [[Strings-tryParseHexUint-string-uint256-uint256-]] ==== `[.contract-item-name]#++tryParseHexUint++#++(string input, uint256 begin, uint256 end) → bool success, uint256 value++` [.item-kind]#internal# Variant of {parseHexUint-string-uint256-uint256} that returns false if the parsing fails because of an invalid character. NOTE: This function will revert if the result does not fit in a `uint256`. [.contract-item] [[Strings-parseAddress-string-]] ==== `[.contract-item-name]#++parseAddress++#++(string input) → address++` [.item-kind]#internal# Parse a hexadecimal string (with or without "0x" prefix), and returns the value as an `address`. Requirements: - The string must be formatted as `(0x)?[0-9a-fA-F]{40}` [.contract-item] [[Strings-parseAddress-string-uint256-uint256-]] ==== `[.contract-item-name]#++parseAddress++#++(string input, uint256 begin, uint256 end) → address++` [.item-kind]#internal# Variant of {parseAddress} that parses a substring of `input` located between position `begin` (included) and `end` (excluded). Requirements: - The substring must be formatted as `(0x)?[0-9a-fA-F]{40}` [.contract-item] [[Strings-tryParseAddress-string-]] ==== `[.contract-item-name]#++tryParseAddress++#++(string input) → bool success, address value++` [.item-kind]#internal# Variant of {parseAddress-string} that returns false if the parsing fails because the input is not a properly formatted address. See {parseAddress} requirements. [.contract-item] [[Strings-tryParseAddress-string-uint256-uint256-]] ==== `[.contract-item-name]#++tryParseAddress++#++(string input, uint256 begin, uint256 end) → bool success, address value++` [.item-kind]#internal# Variant of {parseAddress-string-uint256-uint256} that returns false if the parsing fails because input is not a properly formatted address. See {parseAddress} requirements. [.contract-item] [[Strings-StringsInsufficientHexLength-uint256-uint256-]] ==== `[.contract-item-name]#++StringsInsufficientHexLength++#++(uint256 value, uint256 length)++` [.item-kind]#error# The `value` string doesn't fit in the specified `length`. [.contract-item] [[Strings-StringsInvalidChar--]] ==== `[.contract-item-name]#++StringsInvalidChar++#++()++` [.item-kind]#error# The string being parsed contains characters that are not in scope of the given base. [.contract-item] [[Strings-StringsInvalidAddressFormat--]] ==== `[.contract-item-name]#++StringsInvalidAddressFormat++#++()++` [.item-kind]#error# The string being parsed is not a properly formatted address. :StringTooLong: pass:normal[xref:#ShortStrings-StringTooLong-string-[`++StringTooLong++`]] :InvalidShortString: pass:normal[xref:#ShortStrings-InvalidShortString--[`++InvalidShortString++`]] :toShortString: pass:normal[xref:#ShortStrings-toShortString-string-[`++toShortString++`]] :toString: pass:normal[xref:#ShortStrings-toString-ShortString-[`++toString++`]] :byteLength: pass:normal[xref:#ShortStrings-byteLength-ShortString-[`++byteLength++`]] :toShortStringWithFallback: pass:normal[xref:#ShortStrings-toShortStringWithFallback-string-string-[`++toShortStringWithFallback++`]] :toStringWithFallback: pass:normal[xref:#ShortStrings-toStringWithFallback-ShortString-string-[`++toStringWithFallback++`]] :byteLengthWithFallback: pass:normal[xref:#ShortStrings-byteLengthWithFallback-ShortString-string-[`++byteLengthWithFallback++`]] [.contract] [[ShortStrings]] === `++ShortStrings++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/ShortStrings.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/ShortStrings.sol"; ``` This library provides functions to convert short memory strings into a `ShortString` type that can be used as an immutable variable. Strings of arbitrary length can be optimized using this library if they are short enough (up to 31 bytes) by packing them with their length (1 byte) in a single EVM word (32 bytes). Additionally, a fallback mechanism can be used for every other case. Usage example: ```solidity contract Named { using ShortStrings for *; ShortString private immutable _name; string private _nameFallback; constructor(string memory contractName) { _name = contractName.toShortStringWithFallback(_nameFallback); } function name() external view returns (string memory) { return _name.toStringWithFallback(_nameFallback); } } ``` [.contract-index] .Functions -- * {xref-ShortStrings-toShortString-string-}[`++toShortString(str)++`] * {xref-ShortStrings-toString-ShortString-}[`++toString(sstr)++`] * {xref-ShortStrings-byteLength-ShortString-}[`++byteLength(sstr)++`] * {xref-ShortStrings-toShortStringWithFallback-string-string-}[`++toShortStringWithFallback(value, store)++`] * {xref-ShortStrings-toStringWithFallback-ShortString-string-}[`++toStringWithFallback(value, store)++`] * {xref-ShortStrings-byteLengthWithFallback-ShortString-string-}[`++byteLengthWithFallback(value, store)++`] -- [.contract-index] .Errors -- * {xref-ShortStrings-StringTooLong-string-}[`++StringTooLong(str)++`] * {xref-ShortStrings-InvalidShortString--}[`++InvalidShortString()++`] -- [.contract-item] [[ShortStrings-toShortString-string-]] ==== `[.contract-item-name]#++toShortString++#++(string str) → ShortString++` [.item-kind]#internal# Encode a string of at most 31 chars into a `ShortString`. This will trigger a `StringTooLong` error is the input string is too long. [.contract-item] [[ShortStrings-toString-ShortString-]] ==== `[.contract-item-name]#++toString++#++(ShortString sstr) → string++` [.item-kind]#internal# Decode a `ShortString` back to a "normal" string. [.contract-item] [[ShortStrings-byteLength-ShortString-]] ==== `[.contract-item-name]#++byteLength++#++(ShortString sstr) → uint256++` [.item-kind]#internal# Return the length of a `ShortString`. [.contract-item] [[ShortStrings-toShortStringWithFallback-string-string-]] ==== `[.contract-item-name]#++toShortStringWithFallback++#++(string value, string store) → ShortString++` [.item-kind]#internal# Encode a string into a `ShortString`, or write it to storage if it is too long. [.contract-item] [[ShortStrings-toStringWithFallback-ShortString-string-]] ==== `[.contract-item-name]#++toStringWithFallback++#++(ShortString value, string store) → string++` [.item-kind]#internal# Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}. [.contract-item] [[ShortStrings-byteLengthWithFallback-ShortString-string-]] ==== `[.contract-item-name]#++byteLengthWithFallback++#++(ShortString value, string store) → uint256++` [.item-kind]#internal# Return the length of a string that was encoded to `ShortString` or written to storage using {setWithFallback}. WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of actual characters as the UTF-8 encoding of a single character can span over multiple bytes. [.contract-item] [[ShortStrings-StringTooLong-string-]] ==== `[.contract-item-name]#++StringTooLong++#++(string str)++` [.item-kind]#error# [.contract-item] [[ShortStrings-InvalidShortString--]] ==== `[.contract-item-name]#++InvalidShortString++#++()++` [.item-kind]#error# :erc7201Slot: pass:normal[xref:#SlotDerivation-erc7201Slot-string-[`++erc7201Slot++`]] :offset: pass:normal[xref:#SlotDerivation-offset-bytes32-uint256-[`++offset++`]] :deriveArray: pass:normal[xref:#SlotDerivation-deriveArray-bytes32-[`++deriveArray++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-address-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-bool-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-bytes32-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-uint256-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-int256-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-string-[`++deriveMapping++`]] :deriveMapping: pass:normal[xref:#SlotDerivation-deriveMapping-bytes32-bytes-[`++deriveMapping++`]] [.contract] [[SlotDerivation]] === `++SlotDerivation++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/SlotDerivation.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/SlotDerivation.sol"; ``` Library for computing storage (and transient storage) locations from namespaces and deriving slots corresponding to standard patterns. The derivation method for array and mapping matches the storage layout used by the solidity language / compiler. See https://docs.soliditylang.org/en/v0.8.20/internals/layout_in_storage.html#mappings-and-dynamic-arrays[Solidity docs for mappings and dynamic arrays.]. Example usage: ```solidity contract Example { // Add the library methods using StorageSlot for bytes32; using SlotDerivation for bytes32; // Declare a namespace string private constant _NAMESPACE = "" // eg. OpenZeppelin.Slot function setValueInNamespace(uint256 key, address newValue) internal { _NAMESPACE.erc7201Slot().deriveMapping(key).getAddressSlot().value = newValue; } function getValueInNamespace(uint256 key) internal view returns (address) { return _NAMESPACE.erc7201Slot().deriveMapping(key).getAddressSlot().value; } } ``` TIP: Consider using this library along with {StorageSlot}. NOTE: This library provides a way to manipulate storage locations in a non-standard way. Tooling for checking upgrade safety will ignore the slots accessed through this library. _Available since v5.1._ [.contract-index] .Functions -- * {xref-SlotDerivation-erc7201Slot-string-}[`++erc7201Slot(namespace)++`] * {xref-SlotDerivation-offset-bytes32-uint256-}[`++offset(slot, pos)++`] * {xref-SlotDerivation-deriveArray-bytes32-}[`++deriveArray(slot)++`] * {xref-SlotDerivation-deriveMapping-bytes32-address-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-bool-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-bytes32-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-uint256-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-int256-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-string-}[`++deriveMapping(slot, key)++`] * {xref-SlotDerivation-deriveMapping-bytes32-bytes-}[`++deriveMapping(slot, key)++`] -- [.contract-item] [[SlotDerivation-erc7201Slot-string-]] ==== `[.contract-item-name]#++erc7201Slot++#++(string namespace) → bytes32 slot++` [.item-kind]#internal# Derive an ERC-7201 slot from a string (namespace). [.contract-item] [[SlotDerivation-offset-bytes32-uint256-]] ==== `[.contract-item-name]#++offset++#++(bytes32 slot, uint256 pos) → bytes32 result++` [.item-kind]#internal# Add an offset to a slot to get the n-th element of a structure or an array. [.contract-item] [[SlotDerivation-deriveArray-bytes32-]] ==== `[.contract-item-name]#++deriveArray++#++(bytes32 slot) → bytes32 result++` [.item-kind]#internal# Derive the location of the first element in an array from the slot where the length is stored. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-address-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, address key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-bool-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, bool key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-bytes32-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, bytes32 key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-uint256-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, uint256 key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-int256-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, int256 key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-string-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, string key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. [.contract-item] [[SlotDerivation-deriveMapping-bytes32-bytes-]] ==== `[.contract-item-name]#++deriveMapping++#++(bytes32 slot, bytes key) → bytes32 result++` [.item-kind]#internal# Derive the location of a mapping element from the key. :AddressSlot: pass:normal[xref:#StorageSlot-AddressSlot[`++AddressSlot++`]] :BooleanSlot: pass:normal[xref:#StorageSlot-BooleanSlot[`++BooleanSlot++`]] :Bytes32Slot: pass:normal[xref:#StorageSlot-Bytes32Slot[`++Bytes32Slot++`]] :Uint256Slot: pass:normal[xref:#StorageSlot-Uint256Slot[`++Uint256Slot++`]] :Int256Slot: pass:normal[xref:#StorageSlot-Int256Slot[`++Int256Slot++`]] :StringSlot: pass:normal[xref:#StorageSlot-StringSlot[`++StringSlot++`]] :BytesSlot: pass:normal[xref:#StorageSlot-BytesSlot[`++BytesSlot++`]] :getAddressSlot: pass:normal[xref:#StorageSlot-getAddressSlot-bytes32-[`++getAddressSlot++`]] :getBooleanSlot: pass:normal[xref:#StorageSlot-getBooleanSlot-bytes32-[`++getBooleanSlot++`]] :getBytes32Slot: pass:normal[xref:#StorageSlot-getBytes32Slot-bytes32-[`++getBytes32Slot++`]] :getUint256Slot: pass:normal[xref:#StorageSlot-getUint256Slot-bytes32-[`++getUint256Slot++`]] :getInt256Slot: pass:normal[xref:#StorageSlot-getInt256Slot-bytes32-[`++getInt256Slot++`]] :getStringSlot: pass:normal[xref:#StorageSlot-getStringSlot-bytes32-[`++getStringSlot++`]] :getStringSlot: pass:normal[xref:#StorageSlot-getStringSlot-string-[`++getStringSlot++`]] :getBytesSlot: pass:normal[xref:#StorageSlot-getBytesSlot-bytes32-[`++getBytesSlot++`]] :getBytesSlot: pass:normal[xref:#StorageSlot-getBytesSlot-bytes-[`++getBytesSlot++`]] [.contract] [[StorageSlot]] === `++StorageSlot++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/StorageSlot.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/StorageSlot.sol"; ``` Library for reading and writing primitive types to specific storage slots. Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts. This library helps with reading and writing to such slots without the need for inline assembly. The functions in this library return Slot structs that contain a `value` member that can be used to read or write. Example usage to set ERC-1967 implementation slot: ```solidity contract ERC1967 { // Define the slot. Alternatively, use the SlotDerivation library to derive the slot. bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc; function _getImplementation() internal view returns (address) { return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value; } function _setImplementation(address newImplementation) internal { require(newImplementation.code.length > 0); StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation; } } ``` TIP: Consider using this library along with {SlotDerivation}. [.contract-index] .Functions -- * {xref-StorageSlot-getAddressSlot-bytes32-}[`++getAddressSlot(slot)++`] * {xref-StorageSlot-getBooleanSlot-bytes32-}[`++getBooleanSlot(slot)++`] * {xref-StorageSlot-getBytes32Slot-bytes32-}[`++getBytes32Slot(slot)++`] * {xref-StorageSlot-getUint256Slot-bytes32-}[`++getUint256Slot(slot)++`] * {xref-StorageSlot-getInt256Slot-bytes32-}[`++getInt256Slot(slot)++`] * {xref-StorageSlot-getStringSlot-bytes32-}[`++getStringSlot(slot)++`] * {xref-StorageSlot-getStringSlot-string-}[`++getStringSlot(store)++`] * {xref-StorageSlot-getBytesSlot-bytes32-}[`++getBytesSlot(slot)++`] * {xref-StorageSlot-getBytesSlot-bytes-}[`++getBytesSlot(store)++`] -- [.contract-item] [[StorageSlot-getAddressSlot-bytes32-]] ==== `[.contract-item-name]#++getAddressSlot++#++(bytes32 slot) → struct StorageSlot.AddressSlot r++` [.item-kind]#internal# Returns an `AddressSlot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getBooleanSlot-bytes32-]] ==== `[.contract-item-name]#++getBooleanSlot++#++(bytes32 slot) → struct StorageSlot.BooleanSlot r++` [.item-kind]#internal# Returns a `BooleanSlot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getBytes32Slot-bytes32-]] ==== `[.contract-item-name]#++getBytes32Slot++#++(bytes32 slot) → struct StorageSlot.Bytes32Slot r++` [.item-kind]#internal# Returns a `Bytes32Slot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getUint256Slot-bytes32-]] ==== `[.contract-item-name]#++getUint256Slot++#++(bytes32 slot) → struct StorageSlot.Uint256Slot r++` [.item-kind]#internal# Returns a `Uint256Slot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getInt256Slot-bytes32-]] ==== `[.contract-item-name]#++getInt256Slot++#++(bytes32 slot) → struct StorageSlot.Int256Slot r++` [.item-kind]#internal# Returns a `Int256Slot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getStringSlot-bytes32-]] ==== `[.contract-item-name]#++getStringSlot++#++(bytes32 slot) → struct StorageSlot.StringSlot r++` [.item-kind]#internal# Returns a `StringSlot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getStringSlot-string-]] ==== `[.contract-item-name]#++getStringSlot++#++(string store) → struct StorageSlot.StringSlot r++` [.item-kind]#internal# Returns an `StringSlot` representation of the string storage pointer `store`. [.contract-item] [[StorageSlot-getBytesSlot-bytes32-]] ==== `[.contract-item-name]#++getBytesSlot++#++(bytes32 slot) → struct StorageSlot.BytesSlot r++` [.item-kind]#internal# Returns a `BytesSlot` with member `value` located at `slot`. [.contract-item] [[StorageSlot-getBytesSlot-bytes-]] ==== `[.contract-item-name]#++getBytesSlot++#++(bytes store) → struct StorageSlot.BytesSlot r++` [.item-kind]#internal# Returns an `BytesSlot` representation of the bytes storage pointer `store`. :AddressSlot: pass:normal[xref:#TransientSlot-AddressSlot[`++AddressSlot++`]] :asAddress: pass:normal[xref:#TransientSlot-asAddress-bytes32-[`++asAddress++`]] :BooleanSlot: pass:normal[xref:#TransientSlot-BooleanSlot[`++BooleanSlot++`]] :asBoolean: pass:normal[xref:#TransientSlot-asBoolean-bytes32-[`++asBoolean++`]] :Bytes32Slot: pass:normal[xref:#TransientSlot-Bytes32Slot[`++Bytes32Slot++`]] :asBytes32: pass:normal[xref:#TransientSlot-asBytes32-bytes32-[`++asBytes32++`]] :Uint256Slot: pass:normal[xref:#TransientSlot-Uint256Slot[`++Uint256Slot++`]] :asUint256: pass:normal[xref:#TransientSlot-asUint256-bytes32-[`++asUint256++`]] :Int256Slot: pass:normal[xref:#TransientSlot-Int256Slot[`++Int256Slot++`]] :asInt256: pass:normal[xref:#TransientSlot-asInt256-bytes32-[`++asInt256++`]] :tload: pass:normal[xref:#TransientSlot-tload-TransientSlot-AddressSlot-[`++tload++`]] :tstore: pass:normal[xref:#TransientSlot-tstore-TransientSlot-AddressSlot-address-[`++tstore++`]] :tload: pass:normal[xref:#TransientSlot-tload-TransientSlot-BooleanSlot-[`++tload++`]] :tstore: pass:normal[xref:#TransientSlot-tstore-TransientSlot-BooleanSlot-bool-[`++tstore++`]] :tload: pass:normal[xref:#TransientSlot-tload-TransientSlot-Bytes32Slot-[`++tload++`]] :tstore: pass:normal[xref:#TransientSlot-tstore-TransientSlot-Bytes32Slot-bytes32-[`++tstore++`]] :tload: pass:normal[xref:#TransientSlot-tload-TransientSlot-Uint256Slot-[`++tload++`]] :tstore: pass:normal[xref:#TransientSlot-tstore-TransientSlot-Uint256Slot-uint256-[`++tstore++`]] :tload: pass:normal[xref:#TransientSlot-tload-TransientSlot-Int256Slot-[`++tload++`]] :tstore: pass:normal[xref:#TransientSlot-tstore-TransientSlot-Int256Slot-int256-[`++tstore++`]] [.contract] [[TransientSlot]] === `++TransientSlot++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/TransientSlot.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/TransientSlot.sol"; ``` Library for reading and writing value-types to specific transient storage slots. Transient slots are often used to store temporary values that are removed after the current transaction. This library helps with reading and writing to such slots without the need for inline assembly. * Example reading and writing values using transient storage: ```solidity contract Lock { using TransientSlot for *; // Define the slot. Alternatively, use the SlotDerivation library to derive the slot. bytes32 internal constant _LOCK_SLOT = 0xf4678858b2b588224636b8522b729e7722d32fc491da849ed75b3fdf3c84f542; modifier locked() { require(!_LOCK_SLOT.asBoolean().tload()); _LOCK_SLOT.asBoolean().tstore(true); _; _LOCK_SLOT.asBoolean().tstore(false); } } ``` TIP: Consider using this library along with {SlotDerivation}. [.contract-index] .Functions -- * {xref-TransientSlot-asAddress-bytes32-}[`++asAddress(slot)++`] * {xref-TransientSlot-asBoolean-bytes32-}[`++asBoolean(slot)++`] * {xref-TransientSlot-asBytes32-bytes32-}[`++asBytes32(slot)++`] * {xref-TransientSlot-asUint256-bytes32-}[`++asUint256(slot)++`] * {xref-TransientSlot-asInt256-bytes32-}[`++asInt256(slot)++`] * {xref-TransientSlot-tload-TransientSlot-AddressSlot-}[`++tload(slot)++`] * {xref-TransientSlot-tstore-TransientSlot-AddressSlot-address-}[`++tstore(slot, value)++`] * {xref-TransientSlot-tload-TransientSlot-BooleanSlot-}[`++tload(slot)++`] * {xref-TransientSlot-tstore-TransientSlot-BooleanSlot-bool-}[`++tstore(slot, value)++`] * {xref-TransientSlot-tload-TransientSlot-Bytes32Slot-}[`++tload(slot)++`] * {xref-TransientSlot-tstore-TransientSlot-Bytes32Slot-bytes32-}[`++tstore(slot, value)++`] * {xref-TransientSlot-tload-TransientSlot-Uint256Slot-}[`++tload(slot)++`] * {xref-TransientSlot-tstore-TransientSlot-Uint256Slot-uint256-}[`++tstore(slot, value)++`] * {xref-TransientSlot-tload-TransientSlot-Int256Slot-}[`++tload(slot)++`] * {xref-TransientSlot-tstore-TransientSlot-Int256Slot-int256-}[`++tstore(slot, value)++`] -- [.contract-item] [[TransientSlot-asAddress-bytes32-]] ==== `[.contract-item-name]#++asAddress++#++(bytes32 slot) → TransientSlot.AddressSlot++` [.item-kind]#internal# Cast an arbitrary slot to a AddressSlot. [.contract-item] [[TransientSlot-asBoolean-bytes32-]] ==== `[.contract-item-name]#++asBoolean++#++(bytes32 slot) → TransientSlot.BooleanSlot++` [.item-kind]#internal# Cast an arbitrary slot to a BooleanSlot. [.contract-item] [[TransientSlot-asBytes32-bytes32-]] ==== `[.contract-item-name]#++asBytes32++#++(bytes32 slot) → TransientSlot.Bytes32Slot++` [.item-kind]#internal# Cast an arbitrary slot to a Bytes32Slot. [.contract-item] [[TransientSlot-asUint256-bytes32-]] ==== `[.contract-item-name]#++asUint256++#++(bytes32 slot) → TransientSlot.Uint256Slot++` [.item-kind]#internal# Cast an arbitrary slot to a Uint256Slot. [.contract-item] [[TransientSlot-asInt256-bytes32-]] ==== `[.contract-item-name]#++asInt256++#++(bytes32 slot) → TransientSlot.Int256Slot++` [.item-kind]#internal# Cast an arbitrary slot to a Int256Slot. [.contract-item] [[TransientSlot-tload-TransientSlot-AddressSlot-]] ==== `[.contract-item-name]#++tload++#++(TransientSlot.AddressSlot slot) → address value++` [.item-kind]#internal# Load the value held at location `slot` in transient storage. [.contract-item] [[TransientSlot-tstore-TransientSlot-AddressSlot-address-]] ==== `[.contract-item-name]#++tstore++#++(TransientSlot.AddressSlot slot, address value)++` [.item-kind]#internal# Store `value` at location `slot` in transient storage. [.contract-item] [[TransientSlot-tload-TransientSlot-BooleanSlot-]] ==== `[.contract-item-name]#++tload++#++(TransientSlot.BooleanSlot slot) → bool value++` [.item-kind]#internal# Load the value held at location `slot` in transient storage. [.contract-item] [[TransientSlot-tstore-TransientSlot-BooleanSlot-bool-]] ==== `[.contract-item-name]#++tstore++#++(TransientSlot.BooleanSlot slot, bool value)++` [.item-kind]#internal# Store `value` at location `slot` in transient storage. [.contract-item] [[TransientSlot-tload-TransientSlot-Bytes32Slot-]] ==== `[.contract-item-name]#++tload++#++(TransientSlot.Bytes32Slot slot) → bytes32 value++` [.item-kind]#internal# Load the value held at location `slot` in transient storage. [.contract-item] [[TransientSlot-tstore-TransientSlot-Bytes32Slot-bytes32-]] ==== `[.contract-item-name]#++tstore++#++(TransientSlot.Bytes32Slot slot, bytes32 value)++` [.item-kind]#internal# Store `value` at location `slot` in transient storage. [.contract-item] [[TransientSlot-tload-TransientSlot-Uint256Slot-]] ==== `[.contract-item-name]#++tload++#++(TransientSlot.Uint256Slot slot) → uint256 value++` [.item-kind]#internal# Load the value held at location `slot` in transient storage. [.contract-item] [[TransientSlot-tstore-TransientSlot-Uint256Slot-uint256-]] ==== `[.contract-item-name]#++tstore++#++(TransientSlot.Uint256Slot slot, uint256 value)++` [.item-kind]#internal# Store `value` at location `slot` in transient storage. [.contract-item] [[TransientSlot-tload-TransientSlot-Int256Slot-]] ==== `[.contract-item-name]#++tload++#++(TransientSlot.Int256Slot slot) → int256 value++` [.item-kind]#internal# Load the value held at location `slot` in transient storage. [.contract-item] [[TransientSlot-tstore-TransientSlot-Int256Slot-int256-]] ==== `[.contract-item-name]#++tstore++#++(TransientSlot.Int256Slot slot, int256 value)++` [.item-kind]#internal# Store `value` at location `slot` in transient storage. :multicall: pass:normal[xref:#Multicall-multicall-bytes---[`++multicall++`]] [.contract] [[Multicall]] === `++Multicall++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Multicall.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Multicall.sol"; ``` Provides a function to batch together multiple calls in a single external call. Consider any assumption about calldata validation performed by the sender may be violated if it's not especially careful about sending transactions invoking {multicall}. For example, a relay address that filters function selectors won't filter calls nested within a {multicall} operation. NOTE: Since 5.0.1 and 4.9.4, this contract identifies non-canonical contexts (i.e. `msg.sender` is not {_msgSender}). If a non-canonical context is identified, the following self `delegatecall` appends the last bytes of `msg.data` to the subcall. This makes it safe to use with {ERC2771Context}. Contexts that don't affect the resolution of {_msgSender} are not propagated to subcalls. [.contract-index] .Functions -- * {xref-Multicall-multicall-bytes---}[`++multicall(data)++`] -- [.contract-item] [[Multicall-multicall-bytes---]] ==== `[.contract-item-name]#++multicall++#++(bytes[] data) → bytes[] results++` [.item-kind]#external# Receives and executes a batch of function calls on this contract. :_msgSender: pass:normal[xref:#Context-_msgSender--[`++_msgSender++`]] :_msgData: pass:normal[xref:#Context-_msgData--[`++_msgData++`]] :_contextSuffixLength: pass:normal[xref:#Context-_contextSuffixLength--[`++_contextSuffixLength++`]] [.contract] [[Context]] === `++Context++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Context.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Context.sol"; ``` Provides information about the current execution context, including the sender of the transaction and its data. While these are generally available via msg.sender and msg.data, they should not be accessed in such a direct manner, since when dealing with meta-transactions the account sending and paying for execution may not be the actual sender (as far as an application is concerned). This contract is only required for intermediate, library-like contracts. [.contract-index] .Functions -- * {xref-Context-_msgSender--}[`++_msgSender()++`] * {xref-Context-_msgData--}[`++_msgData()++`] * {xref-Context-_contextSuffixLength--}[`++_contextSuffixLength()++`] -- [.contract-item] [[Context-_msgSender--]] ==== `[.contract-item-name]#++_msgSender++#++() → address++` [.item-kind]#internal# [.contract-item] [[Context-_msgData--]] ==== `[.contract-item-name]#++_msgData++#++() → bytes++` [.item-kind]#internal# [.contract-item] [[Context-_contextSuffixLength--]] ==== `[.contract-item-name]#++_contextSuffixLength++#++() → uint256++` [.item-kind]#internal# :OutOfRangeAccess: pass:normal[xref:#Packing-OutOfRangeAccess--[`++OutOfRangeAccess++`]] :pack_1_1: pass:normal[xref:#Packing-pack_1_1-bytes1-bytes1-[`++pack_1_1++`]] :pack_2_2: pass:normal[xref:#Packing-pack_2_2-bytes2-bytes2-[`++pack_2_2++`]] :pack_2_4: pass:normal[xref:#Packing-pack_2_4-bytes2-bytes4-[`++pack_2_4++`]] :pack_2_6: pass:normal[xref:#Packing-pack_2_6-bytes2-bytes6-[`++pack_2_6++`]] :pack_2_8: pass:normal[xref:#Packing-pack_2_8-bytes2-bytes8-[`++pack_2_8++`]] :pack_2_10: pass:normal[xref:#Packing-pack_2_10-bytes2-bytes10-[`++pack_2_10++`]] :pack_2_20: pass:normal[xref:#Packing-pack_2_20-bytes2-bytes20-[`++pack_2_20++`]] :pack_2_22: pass:normal[xref:#Packing-pack_2_22-bytes2-bytes22-[`++pack_2_22++`]] :pack_4_2: pass:normal[xref:#Packing-pack_4_2-bytes4-bytes2-[`++pack_4_2++`]] :pack_4_4: pass:normal[xref:#Packing-pack_4_4-bytes4-bytes4-[`++pack_4_4++`]] :pack_4_6: pass:normal[xref:#Packing-pack_4_6-bytes4-bytes6-[`++pack_4_6++`]] :pack_4_8: pass:normal[xref:#Packing-pack_4_8-bytes4-bytes8-[`++pack_4_8++`]] :pack_4_12: pass:normal[xref:#Packing-pack_4_12-bytes4-bytes12-[`++pack_4_12++`]] :pack_4_16: pass:normal[xref:#Packing-pack_4_16-bytes4-bytes16-[`++pack_4_16++`]] :pack_4_20: pass:normal[xref:#Packing-pack_4_20-bytes4-bytes20-[`++pack_4_20++`]] :pack_4_24: pass:normal[xref:#Packing-pack_4_24-bytes4-bytes24-[`++pack_4_24++`]] :pack_4_28: pass:normal[xref:#Packing-pack_4_28-bytes4-bytes28-[`++pack_4_28++`]] :pack_6_2: pass:normal[xref:#Packing-pack_6_2-bytes6-bytes2-[`++pack_6_2++`]] :pack_6_4: pass:normal[xref:#Packing-pack_6_4-bytes6-bytes4-[`++pack_6_4++`]] :pack_6_6: pass:normal[xref:#Packing-pack_6_6-bytes6-bytes6-[`++pack_6_6++`]] :pack_6_10: pass:normal[xref:#Packing-pack_6_10-bytes6-bytes10-[`++pack_6_10++`]] :pack_6_16: pass:normal[xref:#Packing-pack_6_16-bytes6-bytes16-[`++pack_6_16++`]] :pack_6_22: pass:normal[xref:#Packing-pack_6_22-bytes6-bytes22-[`++pack_6_22++`]] :pack_8_2: pass:normal[xref:#Packing-pack_8_2-bytes8-bytes2-[`++pack_8_2++`]] :pack_8_4: pass:normal[xref:#Packing-pack_8_4-bytes8-bytes4-[`++pack_8_4++`]] :pack_8_8: pass:normal[xref:#Packing-pack_8_8-bytes8-bytes8-[`++pack_8_8++`]] :pack_8_12: pass:normal[xref:#Packing-pack_8_12-bytes8-bytes12-[`++pack_8_12++`]] :pack_8_16: pass:normal[xref:#Packing-pack_8_16-bytes8-bytes16-[`++pack_8_16++`]] :pack_8_20: pass:normal[xref:#Packing-pack_8_20-bytes8-bytes20-[`++pack_8_20++`]] :pack_8_24: pass:normal[xref:#Packing-pack_8_24-bytes8-bytes24-[`++pack_8_24++`]] :pack_10_2: pass:normal[xref:#Packing-pack_10_2-bytes10-bytes2-[`++pack_10_2++`]] :pack_10_6: pass:normal[xref:#Packing-pack_10_6-bytes10-bytes6-[`++pack_10_6++`]] :pack_10_10: pass:normal[xref:#Packing-pack_10_10-bytes10-bytes10-[`++pack_10_10++`]] :pack_10_12: pass:normal[xref:#Packing-pack_10_12-bytes10-bytes12-[`++pack_10_12++`]] :pack_10_22: pass:normal[xref:#Packing-pack_10_22-bytes10-bytes22-[`++pack_10_22++`]] :pack_12_4: pass:normal[xref:#Packing-pack_12_4-bytes12-bytes4-[`++pack_12_4++`]] :pack_12_8: pass:normal[xref:#Packing-pack_12_8-bytes12-bytes8-[`++pack_12_8++`]] :pack_12_10: pass:normal[xref:#Packing-pack_12_10-bytes12-bytes10-[`++pack_12_10++`]] :pack_12_12: pass:normal[xref:#Packing-pack_12_12-bytes12-bytes12-[`++pack_12_12++`]] :pack_12_16: pass:normal[xref:#Packing-pack_12_16-bytes12-bytes16-[`++pack_12_16++`]] :pack_12_20: pass:normal[xref:#Packing-pack_12_20-bytes12-bytes20-[`++pack_12_20++`]] :pack_16_4: pass:normal[xref:#Packing-pack_16_4-bytes16-bytes4-[`++pack_16_4++`]] :pack_16_6: pass:normal[xref:#Packing-pack_16_6-bytes16-bytes6-[`++pack_16_6++`]] :pack_16_8: pass:normal[xref:#Packing-pack_16_8-bytes16-bytes8-[`++pack_16_8++`]] :pack_16_12: pass:normal[xref:#Packing-pack_16_12-bytes16-bytes12-[`++pack_16_12++`]] :pack_16_16: pass:normal[xref:#Packing-pack_16_16-bytes16-bytes16-[`++pack_16_16++`]] :pack_20_2: pass:normal[xref:#Packing-pack_20_2-bytes20-bytes2-[`++pack_20_2++`]] :pack_20_4: pass:normal[xref:#Packing-pack_20_4-bytes20-bytes4-[`++pack_20_4++`]] :pack_20_8: pass:normal[xref:#Packing-pack_20_8-bytes20-bytes8-[`++pack_20_8++`]] :pack_20_12: pass:normal[xref:#Packing-pack_20_12-bytes20-bytes12-[`++pack_20_12++`]] :pack_22_2: pass:normal[xref:#Packing-pack_22_2-bytes22-bytes2-[`++pack_22_2++`]] :pack_22_6: pass:normal[xref:#Packing-pack_22_6-bytes22-bytes6-[`++pack_22_6++`]] :pack_22_10: pass:normal[xref:#Packing-pack_22_10-bytes22-bytes10-[`++pack_22_10++`]] :pack_24_4: pass:normal[xref:#Packing-pack_24_4-bytes24-bytes4-[`++pack_24_4++`]] :pack_24_8: pass:normal[xref:#Packing-pack_24_8-bytes24-bytes8-[`++pack_24_8++`]] :pack_28_4: pass:normal[xref:#Packing-pack_28_4-bytes28-bytes4-[`++pack_28_4++`]] :extract_2_1: pass:normal[xref:#Packing-extract_2_1-bytes2-uint8-[`++extract_2_1++`]] :replace_2_1: pass:normal[xref:#Packing-replace_2_1-bytes2-bytes1-uint8-[`++replace_2_1++`]] :extract_4_1: pass:normal[xref:#Packing-extract_4_1-bytes4-uint8-[`++extract_4_1++`]] :replace_4_1: pass:normal[xref:#Packing-replace_4_1-bytes4-bytes1-uint8-[`++replace_4_1++`]] :extract_4_2: pass:normal[xref:#Packing-extract_4_2-bytes4-uint8-[`++extract_4_2++`]] :replace_4_2: pass:normal[xref:#Packing-replace_4_2-bytes4-bytes2-uint8-[`++replace_4_2++`]] :extract_6_1: pass:normal[xref:#Packing-extract_6_1-bytes6-uint8-[`++extract_6_1++`]] :replace_6_1: pass:normal[xref:#Packing-replace_6_1-bytes6-bytes1-uint8-[`++replace_6_1++`]] :extract_6_2: pass:normal[xref:#Packing-extract_6_2-bytes6-uint8-[`++extract_6_2++`]] :replace_6_2: pass:normal[xref:#Packing-replace_6_2-bytes6-bytes2-uint8-[`++replace_6_2++`]] :extract_6_4: pass:normal[xref:#Packing-extract_6_4-bytes6-uint8-[`++extract_6_4++`]] :replace_6_4: pass:normal[xref:#Packing-replace_6_4-bytes6-bytes4-uint8-[`++replace_6_4++`]] :extract_8_1: pass:normal[xref:#Packing-extract_8_1-bytes8-uint8-[`++extract_8_1++`]] :replace_8_1: pass:normal[xref:#Packing-replace_8_1-bytes8-bytes1-uint8-[`++replace_8_1++`]] :extract_8_2: pass:normal[xref:#Packing-extract_8_2-bytes8-uint8-[`++extract_8_2++`]] :replace_8_2: pass:normal[xref:#Packing-replace_8_2-bytes8-bytes2-uint8-[`++replace_8_2++`]] :extract_8_4: pass:normal[xref:#Packing-extract_8_4-bytes8-uint8-[`++extract_8_4++`]] :replace_8_4: pass:normal[xref:#Packing-replace_8_4-bytes8-bytes4-uint8-[`++replace_8_4++`]] :extract_8_6: pass:normal[xref:#Packing-extract_8_6-bytes8-uint8-[`++extract_8_6++`]] :replace_8_6: pass:normal[xref:#Packing-replace_8_6-bytes8-bytes6-uint8-[`++replace_8_6++`]] :extract_10_1: pass:normal[xref:#Packing-extract_10_1-bytes10-uint8-[`++extract_10_1++`]] :replace_10_1: pass:normal[xref:#Packing-replace_10_1-bytes10-bytes1-uint8-[`++replace_10_1++`]] :extract_10_2: pass:normal[xref:#Packing-extract_10_2-bytes10-uint8-[`++extract_10_2++`]] :replace_10_2: pass:normal[xref:#Packing-replace_10_2-bytes10-bytes2-uint8-[`++replace_10_2++`]] :extract_10_4: pass:normal[xref:#Packing-extract_10_4-bytes10-uint8-[`++extract_10_4++`]] :replace_10_4: pass:normal[xref:#Packing-replace_10_4-bytes10-bytes4-uint8-[`++replace_10_4++`]] :extract_10_6: pass:normal[xref:#Packing-extract_10_6-bytes10-uint8-[`++extract_10_6++`]] :replace_10_6: pass:normal[xref:#Packing-replace_10_6-bytes10-bytes6-uint8-[`++replace_10_6++`]] :extract_10_8: pass:normal[xref:#Packing-extract_10_8-bytes10-uint8-[`++extract_10_8++`]] :replace_10_8: pass:normal[xref:#Packing-replace_10_8-bytes10-bytes8-uint8-[`++replace_10_8++`]] :extract_12_1: pass:normal[xref:#Packing-extract_12_1-bytes12-uint8-[`++extract_12_1++`]] :replace_12_1: pass:normal[xref:#Packing-replace_12_1-bytes12-bytes1-uint8-[`++replace_12_1++`]] :extract_12_2: pass:normal[xref:#Packing-extract_12_2-bytes12-uint8-[`++extract_12_2++`]] :replace_12_2: pass:normal[xref:#Packing-replace_12_2-bytes12-bytes2-uint8-[`++replace_12_2++`]] :extract_12_4: pass:normal[xref:#Packing-extract_12_4-bytes12-uint8-[`++extract_12_4++`]] :replace_12_4: pass:normal[xref:#Packing-replace_12_4-bytes12-bytes4-uint8-[`++replace_12_4++`]] :extract_12_6: pass:normal[xref:#Packing-extract_12_6-bytes12-uint8-[`++extract_12_6++`]] :replace_12_6: pass:normal[xref:#Packing-replace_12_6-bytes12-bytes6-uint8-[`++replace_12_6++`]] :extract_12_8: pass:normal[xref:#Packing-extract_12_8-bytes12-uint8-[`++extract_12_8++`]] :replace_12_8: pass:normal[xref:#Packing-replace_12_8-bytes12-bytes8-uint8-[`++replace_12_8++`]] :extract_12_10: pass:normal[xref:#Packing-extract_12_10-bytes12-uint8-[`++extract_12_10++`]] :replace_12_10: pass:normal[xref:#Packing-replace_12_10-bytes12-bytes10-uint8-[`++replace_12_10++`]] :extract_16_1: pass:normal[xref:#Packing-extract_16_1-bytes16-uint8-[`++extract_16_1++`]] :replace_16_1: pass:normal[xref:#Packing-replace_16_1-bytes16-bytes1-uint8-[`++replace_16_1++`]] :extract_16_2: pass:normal[xref:#Packing-extract_16_2-bytes16-uint8-[`++extract_16_2++`]] :replace_16_2: pass:normal[xref:#Packing-replace_16_2-bytes16-bytes2-uint8-[`++replace_16_2++`]] :extract_16_4: pass:normal[xref:#Packing-extract_16_4-bytes16-uint8-[`++extract_16_4++`]] :replace_16_4: pass:normal[xref:#Packing-replace_16_4-bytes16-bytes4-uint8-[`++replace_16_4++`]] :extract_16_6: pass:normal[xref:#Packing-extract_16_6-bytes16-uint8-[`++extract_16_6++`]] :replace_16_6: pass:normal[xref:#Packing-replace_16_6-bytes16-bytes6-uint8-[`++replace_16_6++`]] :extract_16_8: pass:normal[xref:#Packing-extract_16_8-bytes16-uint8-[`++extract_16_8++`]] :replace_16_8: pass:normal[xref:#Packing-replace_16_8-bytes16-bytes8-uint8-[`++replace_16_8++`]] :extract_16_10: pass:normal[xref:#Packing-extract_16_10-bytes16-uint8-[`++extract_16_10++`]] :replace_16_10: pass:normal[xref:#Packing-replace_16_10-bytes16-bytes10-uint8-[`++replace_16_10++`]] :extract_16_12: pass:normal[xref:#Packing-extract_16_12-bytes16-uint8-[`++extract_16_12++`]] :replace_16_12: pass:normal[xref:#Packing-replace_16_12-bytes16-bytes12-uint8-[`++replace_16_12++`]] :extract_20_1: pass:normal[xref:#Packing-extract_20_1-bytes20-uint8-[`++extract_20_1++`]] :replace_20_1: pass:normal[xref:#Packing-replace_20_1-bytes20-bytes1-uint8-[`++replace_20_1++`]] :extract_20_2: pass:normal[xref:#Packing-extract_20_2-bytes20-uint8-[`++extract_20_2++`]] :replace_20_2: pass:normal[xref:#Packing-replace_20_2-bytes20-bytes2-uint8-[`++replace_20_2++`]] :extract_20_4: pass:normal[xref:#Packing-extract_20_4-bytes20-uint8-[`++extract_20_4++`]] :replace_20_4: pass:normal[xref:#Packing-replace_20_4-bytes20-bytes4-uint8-[`++replace_20_4++`]] :extract_20_6: pass:normal[xref:#Packing-extract_20_6-bytes20-uint8-[`++extract_20_6++`]] :replace_20_6: pass:normal[xref:#Packing-replace_20_6-bytes20-bytes6-uint8-[`++replace_20_6++`]] :extract_20_8: pass:normal[xref:#Packing-extract_20_8-bytes20-uint8-[`++extract_20_8++`]] :replace_20_8: pass:normal[xref:#Packing-replace_20_8-bytes20-bytes8-uint8-[`++replace_20_8++`]] :extract_20_10: pass:normal[xref:#Packing-extract_20_10-bytes20-uint8-[`++extract_20_10++`]] :replace_20_10: pass:normal[xref:#Packing-replace_20_10-bytes20-bytes10-uint8-[`++replace_20_10++`]] :extract_20_12: pass:normal[xref:#Packing-extract_20_12-bytes20-uint8-[`++extract_20_12++`]] :replace_20_12: pass:normal[xref:#Packing-replace_20_12-bytes20-bytes12-uint8-[`++replace_20_12++`]] :extract_20_16: pass:normal[xref:#Packing-extract_20_16-bytes20-uint8-[`++extract_20_16++`]] :replace_20_16: pass:normal[xref:#Packing-replace_20_16-bytes20-bytes16-uint8-[`++replace_20_16++`]] :extract_22_1: pass:normal[xref:#Packing-extract_22_1-bytes22-uint8-[`++extract_22_1++`]] :replace_22_1: pass:normal[xref:#Packing-replace_22_1-bytes22-bytes1-uint8-[`++replace_22_1++`]] :extract_22_2: pass:normal[xref:#Packing-extract_22_2-bytes22-uint8-[`++extract_22_2++`]] :replace_22_2: pass:normal[xref:#Packing-replace_22_2-bytes22-bytes2-uint8-[`++replace_22_2++`]] :extract_22_4: pass:normal[xref:#Packing-extract_22_4-bytes22-uint8-[`++extract_22_4++`]] :replace_22_4: pass:normal[xref:#Packing-replace_22_4-bytes22-bytes4-uint8-[`++replace_22_4++`]] :extract_22_6: pass:normal[xref:#Packing-extract_22_6-bytes22-uint8-[`++extract_22_6++`]] :replace_22_6: pass:normal[xref:#Packing-replace_22_6-bytes22-bytes6-uint8-[`++replace_22_6++`]] :extract_22_8: pass:normal[xref:#Packing-extract_22_8-bytes22-uint8-[`++extract_22_8++`]] :replace_22_8: pass:normal[xref:#Packing-replace_22_8-bytes22-bytes8-uint8-[`++replace_22_8++`]] :extract_22_10: pass:normal[xref:#Packing-extract_22_10-bytes22-uint8-[`++extract_22_10++`]] :replace_22_10: pass:normal[xref:#Packing-replace_22_10-bytes22-bytes10-uint8-[`++replace_22_10++`]] :extract_22_12: pass:normal[xref:#Packing-extract_22_12-bytes22-uint8-[`++extract_22_12++`]] :replace_22_12: pass:normal[xref:#Packing-replace_22_12-bytes22-bytes12-uint8-[`++replace_22_12++`]] :extract_22_16: pass:normal[xref:#Packing-extract_22_16-bytes22-uint8-[`++extract_22_16++`]] :replace_22_16: pass:normal[xref:#Packing-replace_22_16-bytes22-bytes16-uint8-[`++replace_22_16++`]] :extract_22_20: pass:normal[xref:#Packing-extract_22_20-bytes22-uint8-[`++extract_22_20++`]] :replace_22_20: pass:normal[xref:#Packing-replace_22_20-bytes22-bytes20-uint8-[`++replace_22_20++`]] :extract_24_1: pass:normal[xref:#Packing-extract_24_1-bytes24-uint8-[`++extract_24_1++`]] :replace_24_1: pass:normal[xref:#Packing-replace_24_1-bytes24-bytes1-uint8-[`++replace_24_1++`]] :extract_24_2: pass:normal[xref:#Packing-extract_24_2-bytes24-uint8-[`++extract_24_2++`]] :replace_24_2: pass:normal[xref:#Packing-replace_24_2-bytes24-bytes2-uint8-[`++replace_24_2++`]] :extract_24_4: pass:normal[xref:#Packing-extract_24_4-bytes24-uint8-[`++extract_24_4++`]] :replace_24_4: pass:normal[xref:#Packing-replace_24_4-bytes24-bytes4-uint8-[`++replace_24_4++`]] :extract_24_6: pass:normal[xref:#Packing-extract_24_6-bytes24-uint8-[`++extract_24_6++`]] :replace_24_6: pass:normal[xref:#Packing-replace_24_6-bytes24-bytes6-uint8-[`++replace_24_6++`]] :extract_24_8: pass:normal[xref:#Packing-extract_24_8-bytes24-uint8-[`++extract_24_8++`]] :replace_24_8: pass:normal[xref:#Packing-replace_24_8-bytes24-bytes8-uint8-[`++replace_24_8++`]] :extract_24_10: pass:normal[xref:#Packing-extract_24_10-bytes24-uint8-[`++extract_24_10++`]] :replace_24_10: pass:normal[xref:#Packing-replace_24_10-bytes24-bytes10-uint8-[`++replace_24_10++`]] :extract_24_12: pass:normal[xref:#Packing-extract_24_12-bytes24-uint8-[`++extract_24_12++`]] :replace_24_12: pass:normal[xref:#Packing-replace_24_12-bytes24-bytes12-uint8-[`++replace_24_12++`]] :extract_24_16: pass:normal[xref:#Packing-extract_24_16-bytes24-uint8-[`++extract_24_16++`]] :replace_24_16: pass:normal[xref:#Packing-replace_24_16-bytes24-bytes16-uint8-[`++replace_24_16++`]] :extract_24_20: pass:normal[xref:#Packing-extract_24_20-bytes24-uint8-[`++extract_24_20++`]] :replace_24_20: pass:normal[xref:#Packing-replace_24_20-bytes24-bytes20-uint8-[`++replace_24_20++`]] :extract_24_22: pass:normal[xref:#Packing-extract_24_22-bytes24-uint8-[`++extract_24_22++`]] :replace_24_22: pass:normal[xref:#Packing-replace_24_22-bytes24-bytes22-uint8-[`++replace_24_22++`]] :extract_28_1: pass:normal[xref:#Packing-extract_28_1-bytes28-uint8-[`++extract_28_1++`]] :replace_28_1: pass:normal[xref:#Packing-replace_28_1-bytes28-bytes1-uint8-[`++replace_28_1++`]] :extract_28_2: pass:normal[xref:#Packing-extract_28_2-bytes28-uint8-[`++extract_28_2++`]] :replace_28_2: pass:normal[xref:#Packing-replace_28_2-bytes28-bytes2-uint8-[`++replace_28_2++`]] :extract_28_4: pass:normal[xref:#Packing-extract_28_4-bytes28-uint8-[`++extract_28_4++`]] :replace_28_4: pass:normal[xref:#Packing-replace_28_4-bytes28-bytes4-uint8-[`++replace_28_4++`]] :extract_28_6: pass:normal[xref:#Packing-extract_28_6-bytes28-uint8-[`++extract_28_6++`]] :replace_28_6: pass:normal[xref:#Packing-replace_28_6-bytes28-bytes6-uint8-[`++replace_28_6++`]] :extract_28_8: pass:normal[xref:#Packing-extract_28_8-bytes28-uint8-[`++extract_28_8++`]] :replace_28_8: pass:normal[xref:#Packing-replace_28_8-bytes28-bytes8-uint8-[`++replace_28_8++`]] :extract_28_10: pass:normal[xref:#Packing-extract_28_10-bytes28-uint8-[`++extract_28_10++`]] :replace_28_10: pass:normal[xref:#Packing-replace_28_10-bytes28-bytes10-uint8-[`++replace_28_10++`]] :extract_28_12: pass:normal[xref:#Packing-extract_28_12-bytes28-uint8-[`++extract_28_12++`]] :replace_28_12: pass:normal[xref:#Packing-replace_28_12-bytes28-bytes12-uint8-[`++replace_28_12++`]] :extract_28_16: pass:normal[xref:#Packing-extract_28_16-bytes28-uint8-[`++extract_28_16++`]] :replace_28_16: pass:normal[xref:#Packing-replace_28_16-bytes28-bytes16-uint8-[`++replace_28_16++`]] :extract_28_20: pass:normal[xref:#Packing-extract_28_20-bytes28-uint8-[`++extract_28_20++`]] :replace_28_20: pass:normal[xref:#Packing-replace_28_20-bytes28-bytes20-uint8-[`++replace_28_20++`]] :extract_28_22: pass:normal[xref:#Packing-extract_28_22-bytes28-uint8-[`++extract_28_22++`]] :replace_28_22: pass:normal[xref:#Packing-replace_28_22-bytes28-bytes22-uint8-[`++replace_28_22++`]] :extract_28_24: pass:normal[xref:#Packing-extract_28_24-bytes28-uint8-[`++extract_28_24++`]] :replace_28_24: pass:normal[xref:#Packing-replace_28_24-bytes28-bytes24-uint8-[`++replace_28_24++`]] :extract_32_1: pass:normal[xref:#Packing-extract_32_1-bytes32-uint8-[`++extract_32_1++`]] :replace_32_1: pass:normal[xref:#Packing-replace_32_1-bytes32-bytes1-uint8-[`++replace_32_1++`]] :extract_32_2: pass:normal[xref:#Packing-extract_32_2-bytes32-uint8-[`++extract_32_2++`]] :replace_32_2: pass:normal[xref:#Packing-replace_32_2-bytes32-bytes2-uint8-[`++replace_32_2++`]] :extract_32_4: pass:normal[xref:#Packing-extract_32_4-bytes32-uint8-[`++extract_32_4++`]] :replace_32_4: pass:normal[xref:#Packing-replace_32_4-bytes32-bytes4-uint8-[`++replace_32_4++`]] :extract_32_6: pass:normal[xref:#Packing-extract_32_6-bytes32-uint8-[`++extract_32_6++`]] :replace_32_6: pass:normal[xref:#Packing-replace_32_6-bytes32-bytes6-uint8-[`++replace_32_6++`]] :extract_32_8: pass:normal[xref:#Packing-extract_32_8-bytes32-uint8-[`++extract_32_8++`]] :replace_32_8: pass:normal[xref:#Packing-replace_32_8-bytes32-bytes8-uint8-[`++replace_32_8++`]] :extract_32_10: pass:normal[xref:#Packing-extract_32_10-bytes32-uint8-[`++extract_32_10++`]] :replace_32_10: pass:normal[xref:#Packing-replace_32_10-bytes32-bytes10-uint8-[`++replace_32_10++`]] :extract_32_12: pass:normal[xref:#Packing-extract_32_12-bytes32-uint8-[`++extract_32_12++`]] :replace_32_12: pass:normal[xref:#Packing-replace_32_12-bytes32-bytes12-uint8-[`++replace_32_12++`]] :extract_32_16: pass:normal[xref:#Packing-extract_32_16-bytes32-uint8-[`++extract_32_16++`]] :replace_32_16: pass:normal[xref:#Packing-replace_32_16-bytes32-bytes16-uint8-[`++replace_32_16++`]] :extract_32_20: pass:normal[xref:#Packing-extract_32_20-bytes32-uint8-[`++extract_32_20++`]] :replace_32_20: pass:normal[xref:#Packing-replace_32_20-bytes32-bytes20-uint8-[`++replace_32_20++`]] :extract_32_22: pass:normal[xref:#Packing-extract_32_22-bytes32-uint8-[`++extract_32_22++`]] :replace_32_22: pass:normal[xref:#Packing-replace_32_22-bytes32-bytes22-uint8-[`++replace_32_22++`]] :extract_32_24: pass:normal[xref:#Packing-extract_32_24-bytes32-uint8-[`++extract_32_24++`]] :replace_32_24: pass:normal[xref:#Packing-replace_32_24-bytes32-bytes24-uint8-[`++replace_32_24++`]] :extract_32_28: pass:normal[xref:#Packing-extract_32_28-bytes32-uint8-[`++extract_32_28++`]] :replace_32_28: pass:normal[xref:#Packing-replace_32_28-bytes32-bytes28-uint8-[`++replace_32_28++`]] [.contract] [[Packing]] === `++Packing++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Packing.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Packing.sol"; ``` Helper library packing and unpacking multiple values into bytesXX. Example usage: ```solidity library MyPacker { type MyType is bytes32; function _pack(address account, bytes4 selector, uint64 period) external pure returns (MyType) { bytes12 subpack = Packing.pack_4_8(selector, bytes8(period)); bytes32 pack = Packing.pack_20_12(bytes20(account), subpack); return MyType.wrap(pack); } function _unpack(MyType self) external pure returns (address, bytes4, uint64) { bytes32 pack = MyType.unwrap(self); return ( address(Packing.extract_32_20(pack, 0)), Packing.extract_32_4(pack, 20), uint64(Packing.extract_32_8(pack, 24)) ); } } ``` _Available since v5.1._ [.contract-index] .Functions -- * {xref-Packing-pack_1_1-bytes1-bytes1-}[`++pack_1_1(left, right)++`] * {xref-Packing-pack_2_2-bytes2-bytes2-}[`++pack_2_2(left, right)++`] * {xref-Packing-pack_2_4-bytes2-bytes4-}[`++pack_2_4(left, right)++`] * {xref-Packing-pack_2_6-bytes2-bytes6-}[`++pack_2_6(left, right)++`] * {xref-Packing-pack_2_8-bytes2-bytes8-}[`++pack_2_8(left, right)++`] * {xref-Packing-pack_2_10-bytes2-bytes10-}[`++pack_2_10(left, right)++`] * {xref-Packing-pack_2_20-bytes2-bytes20-}[`++pack_2_20(left, right)++`] * {xref-Packing-pack_2_22-bytes2-bytes22-}[`++pack_2_22(left, right)++`] * {xref-Packing-pack_4_2-bytes4-bytes2-}[`++pack_4_2(left, right)++`] * {xref-Packing-pack_4_4-bytes4-bytes4-}[`++pack_4_4(left, right)++`] * {xref-Packing-pack_4_6-bytes4-bytes6-}[`++pack_4_6(left, right)++`] * {xref-Packing-pack_4_8-bytes4-bytes8-}[`++pack_4_8(left, right)++`] * {xref-Packing-pack_4_12-bytes4-bytes12-}[`++pack_4_12(left, right)++`] * {xref-Packing-pack_4_16-bytes4-bytes16-}[`++pack_4_16(left, right)++`] * {xref-Packing-pack_4_20-bytes4-bytes20-}[`++pack_4_20(left, right)++`] * {xref-Packing-pack_4_24-bytes4-bytes24-}[`++pack_4_24(left, right)++`] * {xref-Packing-pack_4_28-bytes4-bytes28-}[`++pack_4_28(left, right)++`] * {xref-Packing-pack_6_2-bytes6-bytes2-}[`++pack_6_2(left, right)++`] * {xref-Packing-pack_6_4-bytes6-bytes4-}[`++pack_6_4(left, right)++`] * {xref-Packing-pack_6_6-bytes6-bytes6-}[`++pack_6_6(left, right)++`] * {xref-Packing-pack_6_10-bytes6-bytes10-}[`++pack_6_10(left, right)++`] * {xref-Packing-pack_6_16-bytes6-bytes16-}[`++pack_6_16(left, right)++`] * {xref-Packing-pack_6_22-bytes6-bytes22-}[`++pack_6_22(left, right)++`] * {xref-Packing-pack_8_2-bytes8-bytes2-}[`++pack_8_2(left, right)++`] * {xref-Packing-pack_8_4-bytes8-bytes4-}[`++pack_8_4(left, right)++`] * {xref-Packing-pack_8_8-bytes8-bytes8-}[`++pack_8_8(left, right)++`] * {xref-Packing-pack_8_12-bytes8-bytes12-}[`++pack_8_12(left, right)++`] * {xref-Packing-pack_8_16-bytes8-bytes16-}[`++pack_8_16(left, right)++`] * {xref-Packing-pack_8_20-bytes8-bytes20-}[`++pack_8_20(left, right)++`] * {xref-Packing-pack_8_24-bytes8-bytes24-}[`++pack_8_24(left, right)++`] * {xref-Packing-pack_10_2-bytes10-bytes2-}[`++pack_10_2(left, right)++`] * {xref-Packing-pack_10_6-bytes10-bytes6-}[`++pack_10_6(left, right)++`] * {xref-Packing-pack_10_10-bytes10-bytes10-}[`++pack_10_10(left, right)++`] * {xref-Packing-pack_10_12-bytes10-bytes12-}[`++pack_10_12(left, right)++`] * {xref-Packing-pack_10_22-bytes10-bytes22-}[`++pack_10_22(left, right)++`] * {xref-Packing-pack_12_4-bytes12-bytes4-}[`++pack_12_4(left, right)++`] * {xref-Packing-pack_12_8-bytes12-bytes8-}[`++pack_12_8(left, right)++`] * {xref-Packing-pack_12_10-bytes12-bytes10-}[`++pack_12_10(left, right)++`] * {xref-Packing-pack_12_12-bytes12-bytes12-}[`++pack_12_12(left, right)++`] * {xref-Packing-pack_12_16-bytes12-bytes16-}[`++pack_12_16(left, right)++`] * {xref-Packing-pack_12_20-bytes12-bytes20-}[`++pack_12_20(left, right)++`] * {xref-Packing-pack_16_4-bytes16-bytes4-}[`++pack_16_4(left, right)++`] * {xref-Packing-pack_16_6-bytes16-bytes6-}[`++pack_16_6(left, right)++`] * {xref-Packing-pack_16_8-bytes16-bytes8-}[`++pack_16_8(left, right)++`] * {xref-Packing-pack_16_12-bytes16-bytes12-}[`++pack_16_12(left, right)++`] * {xref-Packing-pack_16_16-bytes16-bytes16-}[`++pack_16_16(left, right)++`] * {xref-Packing-pack_20_2-bytes20-bytes2-}[`++pack_20_2(left, right)++`] * {xref-Packing-pack_20_4-bytes20-bytes4-}[`++pack_20_4(left, right)++`] * {xref-Packing-pack_20_8-bytes20-bytes8-}[`++pack_20_8(left, right)++`] * {xref-Packing-pack_20_12-bytes20-bytes12-}[`++pack_20_12(left, right)++`] * {xref-Packing-pack_22_2-bytes22-bytes2-}[`++pack_22_2(left, right)++`] * {xref-Packing-pack_22_6-bytes22-bytes6-}[`++pack_22_6(left, right)++`] * {xref-Packing-pack_22_10-bytes22-bytes10-}[`++pack_22_10(left, right)++`] * {xref-Packing-pack_24_4-bytes24-bytes4-}[`++pack_24_4(left, right)++`] * {xref-Packing-pack_24_8-bytes24-bytes8-}[`++pack_24_8(left, right)++`] * {xref-Packing-pack_28_4-bytes28-bytes4-}[`++pack_28_4(left, right)++`] * {xref-Packing-extract_2_1-bytes2-uint8-}[`++extract_2_1(self, offset)++`] * {xref-Packing-replace_2_1-bytes2-bytes1-uint8-}[`++replace_2_1(self, value, offset)++`] * {xref-Packing-extract_4_1-bytes4-uint8-}[`++extract_4_1(self, offset)++`] * {xref-Packing-replace_4_1-bytes4-bytes1-uint8-}[`++replace_4_1(self, value, offset)++`] * {xref-Packing-extract_4_2-bytes4-uint8-}[`++extract_4_2(self, offset)++`] * {xref-Packing-replace_4_2-bytes4-bytes2-uint8-}[`++replace_4_2(self, value, offset)++`] * {xref-Packing-extract_6_1-bytes6-uint8-}[`++extract_6_1(self, offset)++`] * {xref-Packing-replace_6_1-bytes6-bytes1-uint8-}[`++replace_6_1(self, value, offset)++`] * {xref-Packing-extract_6_2-bytes6-uint8-}[`++extract_6_2(self, offset)++`] * {xref-Packing-replace_6_2-bytes6-bytes2-uint8-}[`++replace_6_2(self, value, offset)++`] * {xref-Packing-extract_6_4-bytes6-uint8-}[`++extract_6_4(self, offset)++`] * {xref-Packing-replace_6_4-bytes6-bytes4-uint8-}[`++replace_6_4(self, value, offset)++`] * {xref-Packing-extract_8_1-bytes8-uint8-}[`++extract_8_1(self, offset)++`] * {xref-Packing-replace_8_1-bytes8-bytes1-uint8-}[`++replace_8_1(self, value, offset)++`] * {xref-Packing-extract_8_2-bytes8-uint8-}[`++extract_8_2(self, offset)++`] * {xref-Packing-replace_8_2-bytes8-bytes2-uint8-}[`++replace_8_2(self, value, offset)++`] * {xref-Packing-extract_8_4-bytes8-uint8-}[`++extract_8_4(self, offset)++`] * {xref-Packing-replace_8_4-bytes8-bytes4-uint8-}[`++replace_8_4(self, value, offset)++`] * {xref-Packing-extract_8_6-bytes8-uint8-}[`++extract_8_6(self, offset)++`] * {xref-Packing-replace_8_6-bytes8-bytes6-uint8-}[`++replace_8_6(self, value, offset)++`] * {xref-Packing-extract_10_1-bytes10-uint8-}[`++extract_10_1(self, offset)++`] * {xref-Packing-replace_10_1-bytes10-bytes1-uint8-}[`++replace_10_1(self, value, offset)++`] * {xref-Packing-extract_10_2-bytes10-uint8-}[`++extract_10_2(self, offset)++`] * {xref-Packing-replace_10_2-bytes10-bytes2-uint8-}[`++replace_10_2(self, value, offset)++`] * {xref-Packing-extract_10_4-bytes10-uint8-}[`++extract_10_4(self, offset)++`] * {xref-Packing-replace_10_4-bytes10-bytes4-uint8-}[`++replace_10_4(self, value, offset)++`] * {xref-Packing-extract_10_6-bytes10-uint8-}[`++extract_10_6(self, offset)++`] * {xref-Packing-replace_10_6-bytes10-bytes6-uint8-}[`++replace_10_6(self, value, offset)++`] * {xref-Packing-extract_10_8-bytes10-uint8-}[`++extract_10_8(self, offset)++`] * {xref-Packing-replace_10_8-bytes10-bytes8-uint8-}[`++replace_10_8(self, value, offset)++`] * {xref-Packing-extract_12_1-bytes12-uint8-}[`++extract_12_1(self, offset)++`] * {xref-Packing-replace_12_1-bytes12-bytes1-uint8-}[`++replace_12_1(self, value, offset)++`] * {xref-Packing-extract_12_2-bytes12-uint8-}[`++extract_12_2(self, offset)++`] * {xref-Packing-replace_12_2-bytes12-bytes2-uint8-}[`++replace_12_2(self, value, offset)++`] * {xref-Packing-extract_12_4-bytes12-uint8-}[`++extract_12_4(self, offset)++`] * {xref-Packing-replace_12_4-bytes12-bytes4-uint8-}[`++replace_12_4(self, value, offset)++`] * {xref-Packing-extract_12_6-bytes12-uint8-}[`++extract_12_6(self, offset)++`] * {xref-Packing-replace_12_6-bytes12-bytes6-uint8-}[`++replace_12_6(self, value, offset)++`] * {xref-Packing-extract_12_8-bytes12-uint8-}[`++extract_12_8(self, offset)++`] * {xref-Packing-replace_12_8-bytes12-bytes8-uint8-}[`++replace_12_8(self, value, offset)++`] * {xref-Packing-extract_12_10-bytes12-uint8-}[`++extract_12_10(self, offset)++`] * {xref-Packing-replace_12_10-bytes12-bytes10-uint8-}[`++replace_12_10(self, value, offset)++`] * {xref-Packing-extract_16_1-bytes16-uint8-}[`++extract_16_1(self, offset)++`] * {xref-Packing-replace_16_1-bytes16-bytes1-uint8-}[`++replace_16_1(self, value, offset)++`] * {xref-Packing-extract_16_2-bytes16-uint8-}[`++extract_16_2(self, offset)++`] * {xref-Packing-replace_16_2-bytes16-bytes2-uint8-}[`++replace_16_2(self, value, offset)++`] * {xref-Packing-extract_16_4-bytes16-uint8-}[`++extract_16_4(self, offset)++`] * {xref-Packing-replace_16_4-bytes16-bytes4-uint8-}[`++replace_16_4(self, value, offset)++`] * {xref-Packing-extract_16_6-bytes16-uint8-}[`++extract_16_6(self, offset)++`] * {xref-Packing-replace_16_6-bytes16-bytes6-uint8-}[`++replace_16_6(self, value, offset)++`] * {xref-Packing-extract_16_8-bytes16-uint8-}[`++extract_16_8(self, offset)++`] * {xref-Packing-replace_16_8-bytes16-bytes8-uint8-}[`++replace_16_8(self, value, offset)++`] * {xref-Packing-extract_16_10-bytes16-uint8-}[`++extract_16_10(self, offset)++`] * {xref-Packing-replace_16_10-bytes16-bytes10-uint8-}[`++replace_16_10(self, value, offset)++`] * {xref-Packing-extract_16_12-bytes16-uint8-}[`++extract_16_12(self, offset)++`] * {xref-Packing-replace_16_12-bytes16-bytes12-uint8-}[`++replace_16_12(self, value, offset)++`] * {xref-Packing-extract_20_1-bytes20-uint8-}[`++extract_20_1(self, offset)++`] * {xref-Packing-replace_20_1-bytes20-bytes1-uint8-}[`++replace_20_1(self, value, offset)++`] * {xref-Packing-extract_20_2-bytes20-uint8-}[`++extract_20_2(self, offset)++`] * {xref-Packing-replace_20_2-bytes20-bytes2-uint8-}[`++replace_20_2(self, value, offset)++`] * {xref-Packing-extract_20_4-bytes20-uint8-}[`++extract_20_4(self, offset)++`] * {xref-Packing-replace_20_4-bytes20-bytes4-uint8-}[`++replace_20_4(self, value, offset)++`] * {xref-Packing-extract_20_6-bytes20-uint8-}[`++extract_20_6(self, offset)++`] * {xref-Packing-replace_20_6-bytes20-bytes6-uint8-}[`++replace_20_6(self, value, offset)++`] * {xref-Packing-extract_20_8-bytes20-uint8-}[`++extract_20_8(self, offset)++`] * {xref-Packing-replace_20_8-bytes20-bytes8-uint8-}[`++replace_20_8(self, value, offset)++`] * {xref-Packing-extract_20_10-bytes20-uint8-}[`++extract_20_10(self, offset)++`] * {xref-Packing-replace_20_10-bytes20-bytes10-uint8-}[`++replace_20_10(self, value, offset)++`] * {xref-Packing-extract_20_12-bytes20-uint8-}[`++extract_20_12(self, offset)++`] * {xref-Packing-replace_20_12-bytes20-bytes12-uint8-}[`++replace_20_12(self, value, offset)++`] * {xref-Packing-extract_20_16-bytes20-uint8-}[`++extract_20_16(self, offset)++`] * {xref-Packing-replace_20_16-bytes20-bytes16-uint8-}[`++replace_20_16(self, value, offset)++`] * {xref-Packing-extract_22_1-bytes22-uint8-}[`++extract_22_1(self, offset)++`] * {xref-Packing-replace_22_1-bytes22-bytes1-uint8-}[`++replace_22_1(self, value, offset)++`] * {xref-Packing-extract_22_2-bytes22-uint8-}[`++extract_22_2(self, offset)++`] * {xref-Packing-replace_22_2-bytes22-bytes2-uint8-}[`++replace_22_2(self, value, offset)++`] * {xref-Packing-extract_22_4-bytes22-uint8-}[`++extract_22_4(self, offset)++`] * {xref-Packing-replace_22_4-bytes22-bytes4-uint8-}[`++replace_22_4(self, value, offset)++`] * {xref-Packing-extract_22_6-bytes22-uint8-}[`++extract_22_6(self, offset)++`] * {xref-Packing-replace_22_6-bytes22-bytes6-uint8-}[`++replace_22_6(self, value, offset)++`] * {xref-Packing-extract_22_8-bytes22-uint8-}[`++extract_22_8(self, offset)++`] * {xref-Packing-replace_22_8-bytes22-bytes8-uint8-}[`++replace_22_8(self, value, offset)++`] * {xref-Packing-extract_22_10-bytes22-uint8-}[`++extract_22_10(self, offset)++`] * {xref-Packing-replace_22_10-bytes22-bytes10-uint8-}[`++replace_22_10(self, value, offset)++`] * {xref-Packing-extract_22_12-bytes22-uint8-}[`++extract_22_12(self, offset)++`] * {xref-Packing-replace_22_12-bytes22-bytes12-uint8-}[`++replace_22_12(self, value, offset)++`] * {xref-Packing-extract_22_16-bytes22-uint8-}[`++extract_22_16(self, offset)++`] * {xref-Packing-replace_22_16-bytes22-bytes16-uint8-}[`++replace_22_16(self, value, offset)++`] * {xref-Packing-extract_22_20-bytes22-uint8-}[`++extract_22_20(self, offset)++`] * {xref-Packing-replace_22_20-bytes22-bytes20-uint8-}[`++replace_22_20(self, value, offset)++`] * {xref-Packing-extract_24_1-bytes24-uint8-}[`++extract_24_1(self, offset)++`] * {xref-Packing-replace_24_1-bytes24-bytes1-uint8-}[`++replace_24_1(self, value, offset)++`] * {xref-Packing-extract_24_2-bytes24-uint8-}[`++extract_24_2(self, offset)++`] * {xref-Packing-replace_24_2-bytes24-bytes2-uint8-}[`++replace_24_2(self, value, offset)++`] * {xref-Packing-extract_24_4-bytes24-uint8-}[`++extract_24_4(self, offset)++`] * {xref-Packing-replace_24_4-bytes24-bytes4-uint8-}[`++replace_24_4(self, value, offset)++`] * {xref-Packing-extract_24_6-bytes24-uint8-}[`++extract_24_6(self, offset)++`] * {xref-Packing-replace_24_6-bytes24-bytes6-uint8-}[`++replace_24_6(self, value, offset)++`] * {xref-Packing-extract_24_8-bytes24-uint8-}[`++extract_24_8(self, offset)++`] * {xref-Packing-replace_24_8-bytes24-bytes8-uint8-}[`++replace_24_8(self, value, offset)++`] * {xref-Packing-extract_24_10-bytes24-uint8-}[`++extract_24_10(self, offset)++`] * {xref-Packing-replace_24_10-bytes24-bytes10-uint8-}[`++replace_24_10(self, value, offset)++`] * {xref-Packing-extract_24_12-bytes24-uint8-}[`++extract_24_12(self, offset)++`] * {xref-Packing-replace_24_12-bytes24-bytes12-uint8-}[`++replace_24_12(self, value, offset)++`] * {xref-Packing-extract_24_16-bytes24-uint8-}[`++extract_24_16(self, offset)++`] * {xref-Packing-replace_24_16-bytes24-bytes16-uint8-}[`++replace_24_16(self, value, offset)++`] * {xref-Packing-extract_24_20-bytes24-uint8-}[`++extract_24_20(self, offset)++`] * {xref-Packing-replace_24_20-bytes24-bytes20-uint8-}[`++replace_24_20(self, value, offset)++`] * {xref-Packing-extract_24_22-bytes24-uint8-}[`++extract_24_22(self, offset)++`] * {xref-Packing-replace_24_22-bytes24-bytes22-uint8-}[`++replace_24_22(self, value, offset)++`] * {xref-Packing-extract_28_1-bytes28-uint8-}[`++extract_28_1(self, offset)++`] * {xref-Packing-replace_28_1-bytes28-bytes1-uint8-}[`++replace_28_1(self, value, offset)++`] * {xref-Packing-extract_28_2-bytes28-uint8-}[`++extract_28_2(self, offset)++`] * {xref-Packing-replace_28_2-bytes28-bytes2-uint8-}[`++replace_28_2(self, value, offset)++`] * {xref-Packing-extract_28_4-bytes28-uint8-}[`++extract_28_4(self, offset)++`] * {xref-Packing-replace_28_4-bytes28-bytes4-uint8-}[`++replace_28_4(self, value, offset)++`] * {xref-Packing-extract_28_6-bytes28-uint8-}[`++extract_28_6(self, offset)++`] * {xref-Packing-replace_28_6-bytes28-bytes6-uint8-}[`++replace_28_6(self, value, offset)++`] * {xref-Packing-extract_28_8-bytes28-uint8-}[`++extract_28_8(self, offset)++`] * {xref-Packing-replace_28_8-bytes28-bytes8-uint8-}[`++replace_28_8(self, value, offset)++`] * {xref-Packing-extract_28_10-bytes28-uint8-}[`++extract_28_10(self, offset)++`] * {xref-Packing-replace_28_10-bytes28-bytes10-uint8-}[`++replace_28_10(self, value, offset)++`] * {xref-Packing-extract_28_12-bytes28-uint8-}[`++extract_28_12(self, offset)++`] * {xref-Packing-replace_28_12-bytes28-bytes12-uint8-}[`++replace_28_12(self, value, offset)++`] * {xref-Packing-extract_28_16-bytes28-uint8-}[`++extract_28_16(self, offset)++`] * {xref-Packing-replace_28_16-bytes28-bytes16-uint8-}[`++replace_28_16(self, value, offset)++`] * {xref-Packing-extract_28_20-bytes28-uint8-}[`++extract_28_20(self, offset)++`] * {xref-Packing-replace_28_20-bytes28-bytes20-uint8-}[`++replace_28_20(self, value, offset)++`] * {xref-Packing-extract_28_22-bytes28-uint8-}[`++extract_28_22(self, offset)++`] * {xref-Packing-replace_28_22-bytes28-bytes22-uint8-}[`++replace_28_22(self, value, offset)++`] * {xref-Packing-extract_28_24-bytes28-uint8-}[`++extract_28_24(self, offset)++`] * {xref-Packing-replace_28_24-bytes28-bytes24-uint8-}[`++replace_28_24(self, value, offset)++`] * {xref-Packing-extract_32_1-bytes32-uint8-}[`++extract_32_1(self, offset)++`] * {xref-Packing-replace_32_1-bytes32-bytes1-uint8-}[`++replace_32_1(self, value, offset)++`] * {xref-Packing-extract_32_2-bytes32-uint8-}[`++extract_32_2(self, offset)++`] * {xref-Packing-replace_32_2-bytes32-bytes2-uint8-}[`++replace_32_2(self, value, offset)++`] * {xref-Packing-extract_32_4-bytes32-uint8-}[`++extract_32_4(self, offset)++`] * {xref-Packing-replace_32_4-bytes32-bytes4-uint8-}[`++replace_32_4(self, value, offset)++`] * {xref-Packing-extract_32_6-bytes32-uint8-}[`++extract_32_6(self, offset)++`] * {xref-Packing-replace_32_6-bytes32-bytes6-uint8-}[`++replace_32_6(self, value, offset)++`] * {xref-Packing-extract_32_8-bytes32-uint8-}[`++extract_32_8(self, offset)++`] * {xref-Packing-replace_32_8-bytes32-bytes8-uint8-}[`++replace_32_8(self, value, offset)++`] * {xref-Packing-extract_32_10-bytes32-uint8-}[`++extract_32_10(self, offset)++`] * {xref-Packing-replace_32_10-bytes32-bytes10-uint8-}[`++replace_32_10(self, value, offset)++`] * {xref-Packing-extract_32_12-bytes32-uint8-}[`++extract_32_12(self, offset)++`] * {xref-Packing-replace_32_12-bytes32-bytes12-uint8-}[`++replace_32_12(self, value, offset)++`] * {xref-Packing-extract_32_16-bytes32-uint8-}[`++extract_32_16(self, offset)++`] * {xref-Packing-replace_32_16-bytes32-bytes16-uint8-}[`++replace_32_16(self, value, offset)++`] * {xref-Packing-extract_32_20-bytes32-uint8-}[`++extract_32_20(self, offset)++`] * {xref-Packing-replace_32_20-bytes32-bytes20-uint8-}[`++replace_32_20(self, value, offset)++`] * {xref-Packing-extract_32_22-bytes32-uint8-}[`++extract_32_22(self, offset)++`] * {xref-Packing-replace_32_22-bytes32-bytes22-uint8-}[`++replace_32_22(self, value, offset)++`] * {xref-Packing-extract_32_24-bytes32-uint8-}[`++extract_32_24(self, offset)++`] * {xref-Packing-replace_32_24-bytes32-bytes24-uint8-}[`++replace_32_24(self, value, offset)++`] * {xref-Packing-extract_32_28-bytes32-uint8-}[`++extract_32_28(self, offset)++`] * {xref-Packing-replace_32_28-bytes32-bytes28-uint8-}[`++replace_32_28(self, value, offset)++`] -- [.contract-index] .Errors -- * {xref-Packing-OutOfRangeAccess--}[`++OutOfRangeAccess()++`] -- [.contract-item] [[Packing-pack_1_1-bytes1-bytes1-]] ==== `[.contract-item-name]#++pack_1_1++#++(bytes1 left, bytes1 right) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_2-bytes2-bytes2-]] ==== `[.contract-item-name]#++pack_2_2++#++(bytes2 left, bytes2 right) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_4-bytes2-bytes4-]] ==== `[.contract-item-name]#++pack_2_4++#++(bytes2 left, bytes4 right) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_6-bytes2-bytes6-]] ==== `[.contract-item-name]#++pack_2_6++#++(bytes2 left, bytes6 right) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_8-bytes2-bytes8-]] ==== `[.contract-item-name]#++pack_2_8++#++(bytes2 left, bytes8 right) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_10-bytes2-bytes10-]] ==== `[.contract-item-name]#++pack_2_10++#++(bytes2 left, bytes10 right) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_20-bytes2-bytes20-]] ==== `[.contract-item-name]#++pack_2_20++#++(bytes2 left, bytes20 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_2_22-bytes2-bytes22-]] ==== `[.contract-item-name]#++pack_2_22++#++(bytes2 left, bytes22 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_2-bytes4-bytes2-]] ==== `[.contract-item-name]#++pack_4_2++#++(bytes4 left, bytes2 right) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_4-bytes4-bytes4-]] ==== `[.contract-item-name]#++pack_4_4++#++(bytes4 left, bytes4 right) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_6-bytes4-bytes6-]] ==== `[.contract-item-name]#++pack_4_6++#++(bytes4 left, bytes6 right) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_8-bytes4-bytes8-]] ==== `[.contract-item-name]#++pack_4_8++#++(bytes4 left, bytes8 right) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_12-bytes4-bytes12-]] ==== `[.contract-item-name]#++pack_4_12++#++(bytes4 left, bytes12 right) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_16-bytes4-bytes16-]] ==== `[.contract-item-name]#++pack_4_16++#++(bytes4 left, bytes16 right) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_20-bytes4-bytes20-]] ==== `[.contract-item-name]#++pack_4_20++#++(bytes4 left, bytes20 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_24-bytes4-bytes24-]] ==== `[.contract-item-name]#++pack_4_24++#++(bytes4 left, bytes24 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_4_28-bytes4-bytes28-]] ==== `[.contract-item-name]#++pack_4_28++#++(bytes4 left, bytes28 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_2-bytes6-bytes2-]] ==== `[.contract-item-name]#++pack_6_2++#++(bytes6 left, bytes2 right) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_4-bytes6-bytes4-]] ==== `[.contract-item-name]#++pack_6_4++#++(bytes6 left, bytes4 right) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_6-bytes6-bytes6-]] ==== `[.contract-item-name]#++pack_6_6++#++(bytes6 left, bytes6 right) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_10-bytes6-bytes10-]] ==== `[.contract-item-name]#++pack_6_10++#++(bytes6 left, bytes10 right) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_16-bytes6-bytes16-]] ==== `[.contract-item-name]#++pack_6_16++#++(bytes6 left, bytes16 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_6_22-bytes6-bytes22-]] ==== `[.contract-item-name]#++pack_6_22++#++(bytes6 left, bytes22 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_2-bytes8-bytes2-]] ==== `[.contract-item-name]#++pack_8_2++#++(bytes8 left, bytes2 right) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_4-bytes8-bytes4-]] ==== `[.contract-item-name]#++pack_8_4++#++(bytes8 left, bytes4 right) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_8-bytes8-bytes8-]] ==== `[.contract-item-name]#++pack_8_8++#++(bytes8 left, bytes8 right) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_12-bytes8-bytes12-]] ==== `[.contract-item-name]#++pack_8_12++#++(bytes8 left, bytes12 right) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_16-bytes8-bytes16-]] ==== `[.contract-item-name]#++pack_8_16++#++(bytes8 left, bytes16 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_20-bytes8-bytes20-]] ==== `[.contract-item-name]#++pack_8_20++#++(bytes8 left, bytes20 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_8_24-bytes8-bytes24-]] ==== `[.contract-item-name]#++pack_8_24++#++(bytes8 left, bytes24 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_10_2-bytes10-bytes2-]] ==== `[.contract-item-name]#++pack_10_2++#++(bytes10 left, bytes2 right) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_10_6-bytes10-bytes6-]] ==== `[.contract-item-name]#++pack_10_6++#++(bytes10 left, bytes6 right) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_10_10-bytes10-bytes10-]] ==== `[.contract-item-name]#++pack_10_10++#++(bytes10 left, bytes10 right) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_10_12-bytes10-bytes12-]] ==== `[.contract-item-name]#++pack_10_12++#++(bytes10 left, bytes12 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_10_22-bytes10-bytes22-]] ==== `[.contract-item-name]#++pack_10_22++#++(bytes10 left, bytes22 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_4-bytes12-bytes4-]] ==== `[.contract-item-name]#++pack_12_4++#++(bytes12 left, bytes4 right) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_8-bytes12-bytes8-]] ==== `[.contract-item-name]#++pack_12_8++#++(bytes12 left, bytes8 right) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_10-bytes12-bytes10-]] ==== `[.contract-item-name]#++pack_12_10++#++(bytes12 left, bytes10 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_12-bytes12-bytes12-]] ==== `[.contract-item-name]#++pack_12_12++#++(bytes12 left, bytes12 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_16-bytes12-bytes16-]] ==== `[.contract-item-name]#++pack_12_16++#++(bytes12 left, bytes16 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_12_20-bytes12-bytes20-]] ==== `[.contract-item-name]#++pack_12_20++#++(bytes12 left, bytes20 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_16_4-bytes16-bytes4-]] ==== `[.contract-item-name]#++pack_16_4++#++(bytes16 left, bytes4 right) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_16_6-bytes16-bytes6-]] ==== `[.contract-item-name]#++pack_16_6++#++(bytes16 left, bytes6 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_16_8-bytes16-bytes8-]] ==== `[.contract-item-name]#++pack_16_8++#++(bytes16 left, bytes8 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_16_12-bytes16-bytes12-]] ==== `[.contract-item-name]#++pack_16_12++#++(bytes16 left, bytes12 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_16_16-bytes16-bytes16-]] ==== `[.contract-item-name]#++pack_16_16++#++(bytes16 left, bytes16 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_20_2-bytes20-bytes2-]] ==== `[.contract-item-name]#++pack_20_2++#++(bytes20 left, bytes2 right) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_20_4-bytes20-bytes4-]] ==== `[.contract-item-name]#++pack_20_4++#++(bytes20 left, bytes4 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_20_8-bytes20-bytes8-]] ==== `[.contract-item-name]#++pack_20_8++#++(bytes20 left, bytes8 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_20_12-bytes20-bytes12-]] ==== `[.contract-item-name]#++pack_20_12++#++(bytes20 left, bytes12 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_22_2-bytes22-bytes2-]] ==== `[.contract-item-name]#++pack_22_2++#++(bytes22 left, bytes2 right) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_22_6-bytes22-bytes6-]] ==== `[.contract-item-name]#++pack_22_6++#++(bytes22 left, bytes6 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_22_10-bytes22-bytes10-]] ==== `[.contract-item-name]#++pack_22_10++#++(bytes22 left, bytes10 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_24_4-bytes24-bytes4-]] ==== `[.contract-item-name]#++pack_24_4++#++(bytes24 left, bytes4 right) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_24_8-bytes24-bytes8-]] ==== `[.contract-item-name]#++pack_24_8++#++(bytes24 left, bytes8 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-pack_28_4-bytes28-bytes4-]] ==== `[.contract-item-name]#++pack_28_4++#++(bytes28 left, bytes4 right) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_2_1-bytes2-uint8-]] ==== `[.contract-item-name]#++extract_2_1++#++(bytes2 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_2_1-bytes2-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_2_1++#++(bytes2 self, bytes1 value, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_4_1-bytes4-uint8-]] ==== `[.contract-item-name]#++extract_4_1++#++(bytes4 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_4_1-bytes4-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_4_1++#++(bytes4 self, bytes1 value, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_4_2-bytes4-uint8-]] ==== `[.contract-item-name]#++extract_4_2++#++(bytes4 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_4_2-bytes4-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_4_2++#++(bytes4 self, bytes2 value, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_6_1-bytes6-uint8-]] ==== `[.contract-item-name]#++extract_6_1++#++(bytes6 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_6_1-bytes6-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_6_1++#++(bytes6 self, bytes1 value, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_6_2-bytes6-uint8-]] ==== `[.contract-item-name]#++extract_6_2++#++(bytes6 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_6_2-bytes6-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_6_2++#++(bytes6 self, bytes2 value, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_6_4-bytes6-uint8-]] ==== `[.contract-item-name]#++extract_6_4++#++(bytes6 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_6_4-bytes6-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_6_4++#++(bytes6 self, bytes4 value, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_8_1-bytes8-uint8-]] ==== `[.contract-item-name]#++extract_8_1++#++(bytes8 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_8_1-bytes8-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_8_1++#++(bytes8 self, bytes1 value, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_8_2-bytes8-uint8-]] ==== `[.contract-item-name]#++extract_8_2++#++(bytes8 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_8_2-bytes8-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_8_2++#++(bytes8 self, bytes2 value, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_8_4-bytes8-uint8-]] ==== `[.contract-item-name]#++extract_8_4++#++(bytes8 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_8_4-bytes8-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_8_4++#++(bytes8 self, bytes4 value, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_8_6-bytes8-uint8-]] ==== `[.contract-item-name]#++extract_8_6++#++(bytes8 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_8_6-bytes8-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_8_6++#++(bytes8 self, bytes6 value, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_10_1-bytes10-uint8-]] ==== `[.contract-item-name]#++extract_10_1++#++(bytes10 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_10_1-bytes10-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_10_1++#++(bytes10 self, bytes1 value, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_10_2-bytes10-uint8-]] ==== `[.contract-item-name]#++extract_10_2++#++(bytes10 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_10_2-bytes10-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_10_2++#++(bytes10 self, bytes2 value, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_10_4-bytes10-uint8-]] ==== `[.contract-item-name]#++extract_10_4++#++(bytes10 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_10_4-bytes10-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_10_4++#++(bytes10 self, bytes4 value, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_10_6-bytes10-uint8-]] ==== `[.contract-item-name]#++extract_10_6++#++(bytes10 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_10_6-bytes10-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_10_6++#++(bytes10 self, bytes6 value, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_10_8-bytes10-uint8-]] ==== `[.contract-item-name]#++extract_10_8++#++(bytes10 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_10_8-bytes10-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_10_8++#++(bytes10 self, bytes8 value, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_1-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_1++#++(bytes12 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_1-bytes12-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_12_1++#++(bytes12 self, bytes1 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_2-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_2++#++(bytes12 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_2-bytes12-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_12_2++#++(bytes12 self, bytes2 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_4-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_4++#++(bytes12 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_4-bytes12-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_12_4++#++(bytes12 self, bytes4 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_6-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_6++#++(bytes12 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_6-bytes12-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_12_6++#++(bytes12 self, bytes6 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_8-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_8++#++(bytes12 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_8-bytes12-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_12_8++#++(bytes12 self, bytes8 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_12_10-bytes12-uint8-]] ==== `[.contract-item-name]#++extract_12_10++#++(bytes12 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_12_10-bytes12-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_12_10++#++(bytes12 self, bytes10 value, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_1-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_1++#++(bytes16 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_1-bytes16-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_16_1++#++(bytes16 self, bytes1 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_2-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_2++#++(bytes16 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_2-bytes16-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_16_2++#++(bytes16 self, bytes2 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_4-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_4++#++(bytes16 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_4-bytes16-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_16_4++#++(bytes16 self, bytes4 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_6-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_6++#++(bytes16 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_6-bytes16-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_16_6++#++(bytes16 self, bytes6 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_8-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_8++#++(bytes16 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_8-bytes16-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_16_8++#++(bytes16 self, bytes8 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_10-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_10++#++(bytes16 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_10-bytes16-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_16_10++#++(bytes16 self, bytes10 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_16_12-bytes16-uint8-]] ==== `[.contract-item-name]#++extract_16_12++#++(bytes16 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_16_12-bytes16-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_16_12++#++(bytes16 self, bytes12 value, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_1-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_1++#++(bytes20 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_1-bytes20-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_20_1++#++(bytes20 self, bytes1 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_2-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_2++#++(bytes20 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_2-bytes20-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_20_2++#++(bytes20 self, bytes2 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_4-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_4++#++(bytes20 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_4-bytes20-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_20_4++#++(bytes20 self, bytes4 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_6-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_6++#++(bytes20 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_6-bytes20-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_20_6++#++(bytes20 self, bytes6 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_8-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_8++#++(bytes20 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_8-bytes20-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_20_8++#++(bytes20 self, bytes8 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_10-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_10++#++(bytes20 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_10-bytes20-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_20_10++#++(bytes20 self, bytes10 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_12-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_12++#++(bytes20 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_12-bytes20-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_20_12++#++(bytes20 self, bytes12 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_20_16-bytes20-uint8-]] ==== `[.contract-item-name]#++extract_20_16++#++(bytes20 self, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_20_16-bytes20-bytes16-uint8-]] ==== `[.contract-item-name]#++replace_20_16++#++(bytes20 self, bytes16 value, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_1-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_1++#++(bytes22 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_1-bytes22-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_22_1++#++(bytes22 self, bytes1 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_2-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_2++#++(bytes22 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_2-bytes22-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_22_2++#++(bytes22 self, bytes2 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_4-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_4++#++(bytes22 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_4-bytes22-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_22_4++#++(bytes22 self, bytes4 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_6-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_6++#++(bytes22 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_6-bytes22-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_22_6++#++(bytes22 self, bytes6 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_8-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_8++#++(bytes22 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_8-bytes22-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_22_8++#++(bytes22 self, bytes8 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_10-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_10++#++(bytes22 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_10-bytes22-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_22_10++#++(bytes22 self, bytes10 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_12-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_12++#++(bytes22 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_12-bytes22-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_22_12++#++(bytes22 self, bytes12 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_16-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_16++#++(bytes22 self, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_16-bytes22-bytes16-uint8-]] ==== `[.contract-item-name]#++replace_22_16++#++(bytes22 self, bytes16 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_22_20-bytes22-uint8-]] ==== `[.contract-item-name]#++extract_22_20++#++(bytes22 self, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_22_20-bytes22-bytes20-uint8-]] ==== `[.contract-item-name]#++replace_22_20++#++(bytes22 self, bytes20 value, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_1-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_1++#++(bytes24 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_1-bytes24-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_24_1++#++(bytes24 self, bytes1 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_2-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_2++#++(bytes24 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_2-bytes24-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_24_2++#++(bytes24 self, bytes2 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_4-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_4++#++(bytes24 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_4-bytes24-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_24_4++#++(bytes24 self, bytes4 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_6-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_6++#++(bytes24 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_6-bytes24-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_24_6++#++(bytes24 self, bytes6 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_8-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_8++#++(bytes24 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_8-bytes24-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_24_8++#++(bytes24 self, bytes8 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_10-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_10++#++(bytes24 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_10-bytes24-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_24_10++#++(bytes24 self, bytes10 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_12-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_12++#++(bytes24 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_12-bytes24-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_24_12++#++(bytes24 self, bytes12 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_16-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_16++#++(bytes24 self, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_16-bytes24-bytes16-uint8-]] ==== `[.contract-item-name]#++replace_24_16++#++(bytes24 self, bytes16 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_20-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_20++#++(bytes24 self, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_20-bytes24-bytes20-uint8-]] ==== `[.contract-item-name]#++replace_24_20++#++(bytes24 self, bytes20 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_24_22-bytes24-uint8-]] ==== `[.contract-item-name]#++extract_24_22++#++(bytes24 self, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_24_22-bytes24-bytes22-uint8-]] ==== `[.contract-item-name]#++replace_24_22++#++(bytes24 self, bytes22 value, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_1-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_1++#++(bytes28 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_1-bytes28-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_28_1++#++(bytes28 self, bytes1 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_2-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_2++#++(bytes28 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_2-bytes28-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_28_2++#++(bytes28 self, bytes2 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_4-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_4++#++(bytes28 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_4-bytes28-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_28_4++#++(bytes28 self, bytes4 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_6-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_6++#++(bytes28 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_6-bytes28-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_28_6++#++(bytes28 self, bytes6 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_8-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_8++#++(bytes28 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_8-bytes28-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_28_8++#++(bytes28 self, bytes8 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_10-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_10++#++(bytes28 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_10-bytes28-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_28_10++#++(bytes28 self, bytes10 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_12-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_12++#++(bytes28 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_12-bytes28-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_28_12++#++(bytes28 self, bytes12 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_16-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_16++#++(bytes28 self, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_16-bytes28-bytes16-uint8-]] ==== `[.contract-item-name]#++replace_28_16++#++(bytes28 self, bytes16 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_20-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_20++#++(bytes28 self, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_20-bytes28-bytes20-uint8-]] ==== `[.contract-item-name]#++replace_28_20++#++(bytes28 self, bytes20 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_22-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_22++#++(bytes28 self, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_22-bytes28-bytes22-uint8-]] ==== `[.contract-item-name]#++replace_28_22++#++(bytes28 self, bytes22 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_28_24-bytes28-uint8-]] ==== `[.contract-item-name]#++extract_28_24++#++(bytes28 self, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_28_24-bytes28-bytes24-uint8-]] ==== `[.contract-item-name]#++replace_28_24++#++(bytes28 self, bytes24 value, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_1-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_1++#++(bytes32 self, uint8 offset) → bytes1 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_1-bytes32-bytes1-uint8-]] ==== `[.contract-item-name]#++replace_32_1++#++(bytes32 self, bytes1 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_2-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_2++#++(bytes32 self, uint8 offset) → bytes2 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_2-bytes32-bytes2-uint8-]] ==== `[.contract-item-name]#++replace_32_2++#++(bytes32 self, bytes2 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_4-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_4++#++(bytes32 self, uint8 offset) → bytes4 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_4-bytes32-bytes4-uint8-]] ==== `[.contract-item-name]#++replace_32_4++#++(bytes32 self, bytes4 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_6-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_6++#++(bytes32 self, uint8 offset) → bytes6 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_6-bytes32-bytes6-uint8-]] ==== `[.contract-item-name]#++replace_32_6++#++(bytes32 self, bytes6 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_8-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_8++#++(bytes32 self, uint8 offset) → bytes8 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_8-bytes32-bytes8-uint8-]] ==== `[.contract-item-name]#++replace_32_8++#++(bytes32 self, bytes8 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_10-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_10++#++(bytes32 self, uint8 offset) → bytes10 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_10-bytes32-bytes10-uint8-]] ==== `[.contract-item-name]#++replace_32_10++#++(bytes32 self, bytes10 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_12-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_12++#++(bytes32 self, uint8 offset) → bytes12 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_12-bytes32-bytes12-uint8-]] ==== `[.contract-item-name]#++replace_32_12++#++(bytes32 self, bytes12 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_16-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_16++#++(bytes32 self, uint8 offset) → bytes16 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_16-bytes32-bytes16-uint8-]] ==== `[.contract-item-name]#++replace_32_16++#++(bytes32 self, bytes16 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_20-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_20++#++(bytes32 self, uint8 offset) → bytes20 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_20-bytes32-bytes20-uint8-]] ==== `[.contract-item-name]#++replace_32_20++#++(bytes32 self, bytes20 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_22-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_22++#++(bytes32 self, uint8 offset) → bytes22 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_22-bytes32-bytes22-uint8-]] ==== `[.contract-item-name]#++replace_32_22++#++(bytes32 self, bytes22 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_24-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_24++#++(bytes32 self, uint8 offset) → bytes24 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_24-bytes32-bytes24-uint8-]] ==== `[.contract-item-name]#++replace_32_24++#++(bytes32 self, bytes24 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-extract_32_28-bytes32-uint8-]] ==== `[.contract-item-name]#++extract_32_28++#++(bytes32 self, uint8 offset) → bytes28 result++` [.item-kind]#internal# [.contract-item] [[Packing-replace_32_28-bytes32-bytes28-uint8-]] ==== `[.contract-item-name]#++replace_32_28++#++(bytes32 self, bytes28 value, uint8 offset) → bytes32 result++` [.item-kind]#internal# [.contract-item] [[Packing-OutOfRangeAccess--]] ==== `[.contract-item-name]#++OutOfRangeAccess++#++()++` [.item-kind]#error# :GENERIC: pass:normal[xref:#Panic-GENERIC-uint256[`++GENERIC++`]] :ASSERT: pass:normal[xref:#Panic-ASSERT-uint256[`++ASSERT++`]] :UNDER_OVERFLOW: pass:normal[xref:#Panic-UNDER_OVERFLOW-uint256[`++UNDER_OVERFLOW++`]] :DIVISION_BY_ZERO: pass:normal[xref:#Panic-DIVISION_BY_ZERO-uint256[`++DIVISION_BY_ZERO++`]] :ENUM_CONVERSION_ERROR: pass:normal[xref:#Panic-ENUM_CONVERSION_ERROR-uint256[`++ENUM_CONVERSION_ERROR++`]] :STORAGE_ENCODING_ERROR: pass:normal[xref:#Panic-STORAGE_ENCODING_ERROR-uint256[`++STORAGE_ENCODING_ERROR++`]] :EMPTY_ARRAY_POP: pass:normal[xref:#Panic-EMPTY_ARRAY_POP-uint256[`++EMPTY_ARRAY_POP++`]] :ARRAY_OUT_OF_BOUNDS: pass:normal[xref:#Panic-ARRAY_OUT_OF_BOUNDS-uint256[`++ARRAY_OUT_OF_BOUNDS++`]] :RESOURCE_ERROR: pass:normal[xref:#Panic-RESOURCE_ERROR-uint256[`++RESOURCE_ERROR++`]] :INVALID_INTERNAL_FUNCTION: pass:normal[xref:#Panic-INVALID_INTERNAL_FUNCTION-uint256[`++INVALID_INTERNAL_FUNCTION++`]] :panic: pass:normal[xref:#Panic-panic-uint256-[`++panic++`]] [.contract] [[Panic]] === `++Panic++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Panic.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Panic.sol"; ``` Helper library for emitting standardized panic codes. ```solidity contract Example { using Panic for uint256; // Use any of the declared internal constants function foo() { Panic.GENERIC.panic(); } // Alternatively function foo() { Panic.panic(Panic.GENERIC); } } ``` Follows the list from https://github.com/ethereum/solidity/blob/v0.8.24/libsolutil/ErrorCodes.h[libsolutil]. _Available since v5.1._ [.contract-index] .Functions -- * {xref-Panic-panic-uint256-}[`++panic(code)++`] -- [.contract-index] .Internal Variables -- * {xref-Panic-GENERIC-uint256}[`++uint256 constant GENERIC++`] * {xref-Panic-ASSERT-uint256}[`++uint256 constant ASSERT++`] * {xref-Panic-UNDER_OVERFLOW-uint256}[`++uint256 constant UNDER_OVERFLOW++`] * {xref-Panic-DIVISION_BY_ZERO-uint256}[`++uint256 constant DIVISION_BY_ZERO++`] * {xref-Panic-ENUM_CONVERSION_ERROR-uint256}[`++uint256 constant ENUM_CONVERSION_ERROR++`] * {xref-Panic-STORAGE_ENCODING_ERROR-uint256}[`++uint256 constant STORAGE_ENCODING_ERROR++`] * {xref-Panic-EMPTY_ARRAY_POP-uint256}[`++uint256 constant EMPTY_ARRAY_POP++`] * {xref-Panic-ARRAY_OUT_OF_BOUNDS-uint256}[`++uint256 constant ARRAY_OUT_OF_BOUNDS++`] * {xref-Panic-RESOURCE_ERROR-uint256}[`++uint256 constant RESOURCE_ERROR++`] * {xref-Panic-INVALID_INTERNAL_FUNCTION-uint256}[`++uint256 constant INVALID_INTERNAL_FUNCTION++`] -- [.contract-item] [[Panic-panic-uint256-]] ==== `[.contract-item-name]#++panic++#++(uint256 code)++` [.item-kind]#internal# Reverts with a panic code. Recommended to use with the internal constants with predefined codes. [.contract-item] [[Panic-GENERIC-uint256]] ==== `uint256 [.contract-item-name]#++GENERIC++#` [.item-kind]#internal constant# generic / unspecified error [.contract-item] [[Panic-ASSERT-uint256]] ==== `uint256 [.contract-item-name]#++ASSERT++#` [.item-kind]#internal constant# used by the assert() builtin [.contract-item] [[Panic-UNDER_OVERFLOW-uint256]] ==== `uint256 [.contract-item-name]#++UNDER_OVERFLOW++#` [.item-kind]#internal constant# arithmetic underflow or overflow [.contract-item] [[Panic-DIVISION_BY_ZERO-uint256]] ==== `uint256 [.contract-item-name]#++DIVISION_BY_ZERO++#` [.item-kind]#internal constant# division or modulo by zero [.contract-item] [[Panic-ENUM_CONVERSION_ERROR-uint256]] ==== `uint256 [.contract-item-name]#++ENUM_CONVERSION_ERROR++#` [.item-kind]#internal constant# enum conversion error [.contract-item] [[Panic-STORAGE_ENCODING_ERROR-uint256]] ==== `uint256 [.contract-item-name]#++STORAGE_ENCODING_ERROR++#` [.item-kind]#internal constant# invalid encoding in storage [.contract-item] [[Panic-EMPTY_ARRAY_POP-uint256]] ==== `uint256 [.contract-item-name]#++EMPTY_ARRAY_POP++#` [.item-kind]#internal constant# empty array pop [.contract-item] [[Panic-ARRAY_OUT_OF_BOUNDS-uint256]] ==== `uint256 [.contract-item-name]#++ARRAY_OUT_OF_BOUNDS++#` [.item-kind]#internal constant# array out of bounds access [.contract-item] [[Panic-RESOURCE_ERROR-uint256]] ==== `uint256 [.contract-item-name]#++RESOURCE_ERROR++#` [.item-kind]#internal constant# resource error (too large allocation or too large array) [.contract-item] [[Panic-INVALID_INTERNAL_FUNCTION-uint256]] ==== `uint256 [.contract-item-name]#++INVALID_INTERNAL_FUNCTION++#` [.item-kind]#internal constant# calling invalid internal function :lt: pass:normal[xref:#Comparators-lt-uint256-uint256-[`++lt++`]] :gt: pass:normal[xref:#Comparators-gt-uint256-uint256-[`++gt++`]] [.contract] [[Comparators]] === `++Comparators++` link:https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v5.2.0/contracts/utils/Comparators.sol[{github-icon},role=heading-link] [.hljs-theme-light.nopadding] ```solidity import "@openzeppelin/contracts/utils/Comparators.sol"; ``` Provides a set of functions to compare values. _Available since v5.1._ [.contract-index] .Functions -- * {xref-Comparators-lt-uint256-uint256-}[`++lt(a, b)++`] * {xref-Comparators-gt-uint256-uint256-}[`++gt(a, b)++`] -- [.contract-item] [[Comparators-lt-uint256-uint256-]] ==== `[.contract-item-name]#++lt++#++(uint256 a, uint256 b) → bool++` [.item-kind]#internal# [.contract-item] [[Comparators-gt-uint256-uint256-]] ==== `[.contract-item-name]#++gt++#++(uint256 a, uint256 b) → bool++` [.item-kind]#internal#