62 lines
2.9 KiB
Solidity
62 lines
2.9 KiB
Solidity
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// SPDX-License-Identifier: MIT
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pragma solidity 0.8.16;
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import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
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import "@openzeppelin/contracts/utils/structs/EnumerableSet.sol";
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import "./interfaces/IERC6672.sol";
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contract ERC6672 is ERC721, IERC6672 {
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using EnumerableSet for EnumerableSet.Bytes32Set;
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bytes4 public constant IERC6672_ID = type(IERC6672).interfaceId;
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mapping(address => mapping(uint256 => mapping(bytes32 => bool))) redemptionStatus;
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mapping(address => mapping(uint256 => mapping(bytes32 => string))) public memos;
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mapping(address => mapping(uint256 => EnumerableSet.Bytes32Set)) redemptions;
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constructor() ERC721("Multiple RedeemableNFT", "mrNFT") {}
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function isRedeemed(address _operator, bytes32 _redemptionId, uint256 _tokenId) external view returns (bool) {
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return _isRedeemed(_operator, _redemptionId, _tokenId);
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}
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function getRedemptionIds(address _operator, uint256 _tokenId) external view returns (bytes32[] memory) {
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require(redemptions[_operator][_tokenId].length() > 0, "ERC6672: token doesn't have any redemptions.");
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return redemptions[_operator][_tokenId].values();
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}
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function redeem(bytes32 _redemptionId, uint256 _tokenId, string memory _memo) external {
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address _operator = msg.sender;
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require(!_isRedeemed(_operator, _redemptionId, _tokenId), "ERC6672: token already redeemed.");
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_update(_operator, _redemptionId, _tokenId, _memo, true);
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redemptions[_operator][_tokenId].add(_redemptionId);
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}
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function cancel(bytes32 _redemptionId, uint256 _tokenId, string memory _memo) external {
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address _operator = msg.sender;
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require(_isRedeemed(_operator, _redemptionId, _tokenId), "ERC6672: token doesn't redeemed.");
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_update(_operator, _redemptionId, _tokenId, _memo, false);
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_removeRedemption(_operator, _redemptionId, _tokenId);
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}
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function _isRedeemed(address _operator, bytes32 _redemptionId, uint256 _tokenId) internal view returns (bool) {
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require(_exists(_tokenId), "ERC6672: token doesn't exists.");
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return redemptionStatus[_operator][_tokenId][_redemptionId];
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}
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function _update(address _operator, bytes32 _redemptionId, uint256 _tokenId, string memory _memo, bool isRedeemed_) internal {
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redemptionStatus[_operator][_tokenId][_redemptionId] = isRedeemed_;
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memos[_operator][_tokenId][_redemptionId] = _memo;
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}
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function _removeRedemption(address _operator, bytes32 _redemptionId, uint256 _tokenId) internal {
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redemptions[_operator][_tokenId].remove(_redemptionId);
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}
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function supportsInterface(bytes4 interfaceId) public view virtual override(ERC721, IERC165) returns (bool) {
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return
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interfaceId == type(IERC721).interfaceId ||
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interfaceId == type(IERC6672).interfaceId ||
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super.supportsInterface(interfaceId);
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}
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}
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