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@@ -1,468 +0,0 @@
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---- token/ERC721/ERC721.sol.orig 1969-12-31 18:00:00
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-+++ token/ERC721/ERC721.sol.orig 2023-08-13 09:56:16
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-@@ -0,0 +1,465 @@
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-+// SPDX-License-Identifier: MIT
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-+// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/ERC721.sol)
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-+
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-+pragma solidity ^0.8.20;
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-+
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-+import {IERC721} from "./IERC721.sol";
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-+import {IERC721Receiver} from "./IERC721Receiver.sol";
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-+import {IERC721Metadata} from "./extensions/IERC721Metadata.sol";
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-+import {Context} from "../../utils/Context.sol";
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-+import {Strings} from "../../utils/Strings.sol";
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-+import {IERC165, ERC165} from "../../utils/introspection/ERC165.sol";
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-+import {IERC721Errors} from "../../interfaces/draft-IERC6093.sol";
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-+
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-+/**
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-+ * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including
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-+ * the Metadata extension, but not including the Enumerable extension, which is available separately as
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-+ * {ERC721Enumerable}.
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-+ */
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-+abstract contract ERC721 is Context, ERC165, IERC721, IERC721Metadata, IERC721Errors {
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-+ using Strings for uint256;
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-+
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-+ // Token name
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-+ string private _name;
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-+
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-+ // Token symbol
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-+ string private _symbol;
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-+
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-+ mapping(uint256 tokenId => address) private _owners;
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-+
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-+ mapping(address owner => uint256) private _balances;
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-+
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-+ mapping(uint256 tokenId => address) private _tokenApprovals;
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-+
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-+ mapping(address owner => mapping(address operator => bool)) private _operatorApprovals;
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-+
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-+ /**
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-+ * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection.
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-+ */
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-+ constructor(string memory name_, string memory symbol_) {
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-+ _name = name_;
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-+ _symbol = symbol_;
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC165-supportsInterface}.
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-+ */
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-+ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
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-+ return
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-+ interfaceId == type(IERC721).interfaceId ||
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-+ interfaceId == type(IERC721Metadata).interfaceId ||
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-+ super.supportsInterface(interfaceId);
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-balanceOf}.
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-+ */
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-+ function balanceOf(address owner) public view virtual returns (uint256) {
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-+ if (owner == address(0)) {
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-+ revert ERC721InvalidOwner(address(0));
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-+ }
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-+ return _balances[owner];
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-ownerOf}.
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-+ */
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-+ function ownerOf(uint256 tokenId) public view virtual returns (address) {
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-+ address owner = _ownerOf(tokenId);
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-+ if (owner == address(0)) {
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-+ revert ERC721NonexistentToken(tokenId);
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-+ }
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-+ return owner;
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721Metadata-name}.
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-+ */
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-+ function name() public view virtual returns (string memory) {
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-+ return _name;
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721Metadata-symbol}.
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-+ */
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-+ function symbol() public view virtual returns (string memory) {
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-+ return _symbol;
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721Metadata-tokenURI}.
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-+ */
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-+ function tokenURI(uint256 tokenId) public view virtual returns (string memory) {
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-+ _requireMinted(tokenId);
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-+
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-+ string memory baseURI = _baseURI();
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-+ return bytes(baseURI).length > 0 ? string.concat(baseURI, tokenId.toString()) : "";
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-+ }
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-+
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-+ /**
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-+ * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each
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-+ * token will be the concatenation of the `baseURI` and the `tokenId`. Empty
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-+ * by default, can be overridden in child contracts.
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-+ */
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-+ function _baseURI() internal view virtual returns (string memory) {
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-+ return "";
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-approve}.
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-+ */
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-+ function approve(address to, uint256 tokenId) public virtual {
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-+ _approve(to, tokenId, _msgSender());
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-getApproved}.
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-+ */
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-+ function getApproved(uint256 tokenId) public view virtual returns (address) {
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-+ _requireMinted(tokenId);
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-+
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-+ return _getApproved(tokenId);
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-setApprovalForAll}.
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-+ */
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-+ function setApprovalForAll(address operator, bool approved) public virtual {
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-+ _setApprovalForAll(_msgSender(), operator, approved);
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-isApprovedForAll}.
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-+ */
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-+ function isApprovedForAll(address owner, address operator) public view virtual returns (bool) {
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-+ return _operatorApprovals[owner][operator];
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-transferFrom}.
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-+ */
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-+ function transferFrom(address from, address to, uint256 tokenId) public virtual {
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-+ if (to == address(0)) {
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-+ revert ERC721InvalidReceiver(address(0));
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-+ }
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-+ // Setting an "auth" arguments enables the `_isAuthorized` check which verifies that the token exists
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-+ // (from != 0). Therefore, it is not needed to verify that the return value is not 0 here.
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-+ address previousOwner = _update(to, tokenId, _msgSender());
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-+ if (previousOwner != from) {
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-+ revert ERC721IncorrectOwner(from, tokenId, previousOwner);
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-safeTransferFrom}.
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-+ */
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-+ function safeTransferFrom(address from, address to, uint256 tokenId) public {
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-+ safeTransferFrom(from, to, tokenId, "");
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-+ }
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-+
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-+ /**
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-+ * @dev See {IERC721-safeTransferFrom}.
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-+ */
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-+ function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public virtual {
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-+ transferFrom(from, to, tokenId);
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-+ _checkOnERC721Received(from, to, tokenId, data);
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-+ }
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-+
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-+ /**
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-+ * @dev Returns the owner of the `tokenId`. Does NOT revert if token doesn't exist
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-+ *
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-+ * IMPORTANT: Any overrides to this function that add ownership of tokens not tracked by the
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-+ * core ERC721 logic MUST be matched with the use of {_increaseBalance} to keep balances
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-+ * consistent with ownership. The invariant to preserve is that for any address `a` the value returned by
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-+ * `balanceOf(a)` must be equal to the number of tokens such that `_ownerOf(tokenId)` is `a`.
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-+ */
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-+ function _ownerOf(uint256 tokenId) internal view virtual returns (address) {
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-+ return _owners[tokenId];
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-+ }
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-+
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-+ /**
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-+ * @dev Returns the approved address for `tokenId`. Returns 0 if `tokenId` is not minted.
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-+ */
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-+ function _getApproved(uint256 tokenId) internal view virtual returns (address) {
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-+ return _tokenApprovals[tokenId];
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-+ }
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-+
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-+ /**
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-+ * @dev Returns whether `spender` is allowed to manage `owner`'s tokens, or `tokenId` in
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-+ * particular (ignoring whether it is owned by `owner`).
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-+ *
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-+ * WARNING: This function assumes that `owner` is the actual owner of `tokenId` and does not
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-+ * verify this assumption.
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-+ */
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-+ function _isAuthorized(address owner, address spender, uint256 tokenId) internal view virtual returns (bool) {
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-+ return
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-+ spender != address(0) &&
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-+ (owner == spender || isApprovedForAll(owner, spender) || _getApproved(tokenId) == spender);
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-+ }
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-+
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-+ /**
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-+ * @dev Checks if `spender` can operate on `tokenId`, assuming the provided `owner` is the actual owner.
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-+ * Reverts if `spender` has not approval for all assets of the provided `owner` nor the actual owner approved the `spender` for the specific `tokenId`.
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-+ *
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-+ * WARNING: This function relies on {_isAuthorized}, so it doesn't check whether `owner` is the
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-+ * actual owner of `tokenId`.
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-+ */
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-+ function _checkAuthorized(address owner, address spender, uint256 tokenId) internal view virtual {
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-+ if (!_isAuthorized(owner, spender, tokenId)) {
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-+ if (owner == address(0)) {
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-+ revert ERC721NonexistentToken(tokenId);
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-+ } else {
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-+ revert ERC721InsufficientApproval(spender, tokenId);
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-+ }
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev Unsafe write access to the balances, used by extensions that "mint" tokens using an {ownerOf} override.
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-+ *
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-+ * NOTE: the value is limited to type(uint128).max. This protect against _balance overflow. It is unrealistic that
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-+ * a uint256 would ever overflow from increments when these increments are bounded to uint128 values.
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-+ *
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-+ * WARNING: Increasing an account's balance using this function tends to be paired with an override of the
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-+ * {_ownerOf} function to resolve the ownership of the corresponding tokens so that balances and ownership
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-+ * remain consistent with one another.
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-+ */
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-+ function _increaseBalance(address account, uint128 value) internal virtual {
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-+ unchecked {
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-+ _balances[account] += value;
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev Transfers `tokenId` from its current owner to `to`, or alternatively mints (or burns) if the current owner
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-+ * (or `to`) is the zero address. Returns the owner of the `tokenId` before the update.
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-+ *
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-+ * The `auth` argument is optional. If the value passed is non 0, then this function will check that
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-+ * `auth` is either the owner of the token, or approved to operate on the token (by the owner).
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-+ *
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-+ * Emits a {Transfer} event.
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-+ *
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-+ * NOTE: If overriding this function in a way that tracks balances, see also {_increaseBalance}.
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-+ */
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-+ function _update(address to, uint256 tokenId, address auth) internal virtual returns (address) {
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-+ address from = _ownerOf(tokenId);
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-+
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-+ // Perform (optional) operator check
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-+ if (auth != address(0)) {
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-+ _checkAuthorized(from, auth, tokenId);
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-+ }
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-+
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-+ // Execute the update
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-+ if (from != address(0)) {
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-+ delete _tokenApprovals[tokenId];
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-+ unchecked {
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-+ _balances[from] -= 1;
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-+ }
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-+ }
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-+
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-+ if (to != address(0)) {
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-+ unchecked {
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-+ _balances[to] += 1;
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-+ }
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-+ }
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-+
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-+ _owners[tokenId] = to;
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-+
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-+ emit Transfer(from, to, tokenId);
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-+
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-+ return from;
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-+ }
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-+
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-+ /**
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-+ * @dev Mints `tokenId` and transfers it to `to`.
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-+ *
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-+ * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible
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-+ *
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-+ * Requirements:
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-+ *
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-+ * - `tokenId` must not exist.
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-+ * - `to` cannot be the zero address.
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-+ *
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-+ * Emits a {Transfer} event.
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-+ */
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-+ function _mint(address to, uint256 tokenId) internal {
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-+ if (to == address(0)) {
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-+ revert ERC721InvalidReceiver(address(0));
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-+ }
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-+ address previousOwner = _update(to, tokenId, address(0));
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-+ if (previousOwner != address(0)) {
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-+ revert ERC721InvalidSender(address(0));
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev Mints `tokenId`, transfers it to `to` and checks for `to` acceptance.
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-+ *
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-+ * Requirements:
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-+ *
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-+ * - `tokenId` must not exist.
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-+ * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
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-+ *
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-+ * Emits a {Transfer} event.
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-+ */
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-+ function _safeMint(address to, uint256 tokenId) internal {
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-+ _safeMint(to, tokenId, "");
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-+ }
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-+
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-+ /**
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-+ * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is
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-+ * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
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-+ */
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-+ function _safeMint(address to, uint256 tokenId, bytes memory data) internal virtual {
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-+ _mint(to, tokenId);
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-+ _checkOnERC721Received(address(0), to, tokenId, data);
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-+ }
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-+
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-+ /**
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-+ * @dev Destroys `tokenId`.
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-+ * The approval is cleared when the token is burned.
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-+ * This is an internal function that does not check if the sender is authorized to operate on the token.
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-+ *
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-+ * Requirements:
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-+ *
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-+ * - `tokenId` must exist.
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-+ *
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-+ * Emits a {Transfer} event.
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-+ */
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-+ function _burn(uint256 tokenId) internal {
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-+ address previousOwner = _update(address(0), tokenId, address(0));
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-+ if (previousOwner == address(0)) {
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-+ revert ERC721NonexistentToken(tokenId);
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev Transfers `tokenId` from `from` to `to`.
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-+ * As opposed to {transferFrom}, this imposes no restrictions on msg.sender.
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-+ *
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-+ * Requirements:
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-+ *
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-+ * - `to` cannot be the zero address.
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-+ * - `tokenId` token must be owned by `from`.
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-+ *
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-+ * Emits a {Transfer} event.
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-+ */
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-+ function _transfer(address from, address to, uint256 tokenId) internal {
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-+ if (to == address(0)) {
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-+ revert ERC721InvalidReceiver(address(0));
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-+ }
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-+ address previousOwner = _update(to, tokenId, address(0));
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-+ if (previousOwner == address(0)) {
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-+ revert ERC721NonexistentToken(tokenId);
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-+ } else if (previousOwner != from) {
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-+ revert ERC721IncorrectOwner(from, tokenId, previousOwner);
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-+ }
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-+ }
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-+
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-+ /**
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-+ * @dev Safely transfers `tokenId` token from `from` to `to`, checking that contract recipients
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-+ * are aware of the ERC721 standard to prevent tokens from being forever locked.
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-+ *
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-+ * `data` is additional data, it has no specified format and it is sent in call to `to`.
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-+ *
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-+ * This internal function is like {safeTransferFrom} in the sense that it invokes
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-+ * {IERC721Receiver-onERC721Received} on the receiver, and can be used to e.g.
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-+ * implement alternative mechanisms to perform token transfer, such as signature-based.
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-+ *
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-+ * Requirements:
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-+ *
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-+ * - `tokenId` token must exist and be owned by `from`.
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-+ * - `to` cannot be the zero address.
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-+ * - `from` cannot be the zero address.
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-+ * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
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-+ *
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-+ * Emits a {Transfer} event.
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-+ */
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-+ function _safeTransfer(address from, address to, uint256 tokenId) internal {
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|
-+ _safeTransfer(from, to, tokenId, "");
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /**
|
|
|
-+ * @dev Same as {xref-ERC721-_safeTransfer-address-address-uint256-}[`_safeTransfer`], with an additional `data` parameter which is
|
|
|
-+ * forwarded in {IERC721Receiver-onERC721Received} to contract recipients.
|
|
|
-+ */
|
|
|
-+ function _safeTransfer(address from, address to, uint256 tokenId, bytes memory data) internal virtual {
|
|
|
-+ _transfer(from, to, tokenId);
|
|
|
-+ _checkOnERC721Received(from, to, tokenId, data);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /**
|
|
|
-+ * @dev Approve `to` to operate on `tokenId`
|
|
|
-+ *
|
|
|
-+ * The `auth` argument is optional. If the value passed is non 0, then this function will check that `auth` is
|
|
|
-+ * either the owner of the token, or approved to operate on all tokens held by this owner.
|
|
|
-+ *
|
|
|
-+ * Emits an {Approval} event.
|
|
|
-+ */
|
|
|
-+ function _approve(address to, uint256 tokenId, address auth) internal virtual returns (address) {
|
|
|
-+ address owner = ownerOf(tokenId);
|
|
|
-+
|
|
|
-+ // We do not use _isAuthorized because single-token approvals should not be able to call approve
|
|
|
-+ if (auth != address(0) && owner != auth && !isApprovedForAll(owner, auth)) {
|
|
|
-+ revert ERC721InvalidApprover(auth);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ _tokenApprovals[tokenId] = to;
|
|
|
-+ emit Approval(owner, to, tokenId);
|
|
|
-+
|
|
|
-+ return owner;
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /**
|
|
|
-+ * @dev Approve `operator` to operate on all of `owner` tokens
|
|
|
-+ *
|
|
|
-+ * Requirements:
|
|
|
-+ * - operator can't be the address zero.
|
|
|
-+ *
|
|
|
-+ * Emits an {ApprovalForAll} event.
|
|
|
-+ */
|
|
|
-+ function _setApprovalForAll(address owner, address operator, bool approved) internal virtual {
|
|
|
-+ if (operator == address(0)) {
|
|
|
-+ revert ERC721InvalidOperator(operator);
|
|
|
-+ }
|
|
|
-+ _operatorApprovals[owner][operator] = approved;
|
|
|
-+ emit ApprovalForAll(owner, operator, approved);
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /**
|
|
|
-+ * @dev Reverts if the `tokenId` has not been minted yet.
|
|
|
-+ */
|
|
|
-+ function _requireMinted(uint256 tokenId) internal view virtual {
|
|
|
-+ if (_ownerOf(tokenId) == address(0)) {
|
|
|
-+ revert ERC721NonexistentToken(tokenId);
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+
|
|
|
-+ /**
|
|
|
-+ * @dev Private function to invoke {IERC721Receiver-onERC721Received} on a target address. This will revert if the
|
|
|
-+ * recipient doesn't accept the token transfer. The call is not executed if the target address is not a contract.
|
|
|
-+ *
|
|
|
-+ * @param from address representing the previous owner of the given token ID
|
|
|
-+ * @param to target address that will receive the tokens
|
|
|
-+ * @param tokenId uint256 ID of the token to be transferred
|
|
|
-+ * @param data bytes optional data to send along with the call
|
|
|
-+ */
|
|
|
-+ function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory data) private {
|
|
|
-+ if (to.code.length > 0) {
|
|
|
-+ try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, data) returns (bytes4 retval) {
|
|
|
-+ if (retval != IERC721Receiver.onERC721Received.selector) {
|
|
|
-+ revert ERC721InvalidReceiver(to);
|
|
|
-+ }
|
|
|
-+ } catch (bytes memory reason) {
|
|
|
-+ if (reason.length == 0) {
|
|
|
-+ revert ERC721InvalidReceiver(to);
|
|
|
-+ } else {
|
|
|
-+ /// @solidity memory-safe-assembly
|
|
|
-+ assembly {
|
|
|
-+ revert(add(32, reason), mload(reason))
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+ }
|
|
|
-+}
|
ernestognw