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- // SPDX-License-Identifier: MIT
- // OpenZeppelin Contracts (last updated v4.5.0-rc.0) (governance/extensions/GovernorVotes.sol)
- pragma solidity ^0.8.0;
- import "../GovernorUpgradeable.sol";
- import "../utils/IVotesUpgradeable.sol";
- import "../../proxy/utils/Initializable.sol";
- /**
- * @dev Extension of {Governor} for voting weight extraction from an {ERC20Votes} token, or since v4.5 an {ERC721Votes} token.
- *
- * _Available since v4.3._
- */
- abstract contract GovernorVotesUpgradeable is Initializable, GovernorUpgradeable {
- IVotesUpgradeable public token;
- function __GovernorVotes_init(IVotesUpgradeable tokenAddress) internal onlyInitializing {
- __GovernorVotes_init_unchained(tokenAddress);
- }
- function __GovernorVotes_init_unchained(IVotesUpgradeable tokenAddress) internal onlyInitializing {
- token = tokenAddress;
- }
- /**
- * Read the voting weight from the token's built in snapshot mechanism (see {IGovernor-getVotes}).
- */
- function getVotes(address account, uint256 blockNumber) public view virtual override returns (uint256) {
- return token.getPastVotes(account, blockNumber);
- }
- /**
- * This empty reserved space is put in place to allow future versions to add new
- * variables without shifting down storage in the inheritance chain.
- * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
- */
- uint256[50] private __gap;
- }
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