Многоразовые NFT? Революционный протокол ERC-6672 NFT. Анализ

В начале этого года тайваньский стартап RE:DREAMER представил совершенно новый стандартный протокол - ERC-6672, созданный на основе ERC-721. Этот протокол революционизирует концепцию НФТ, позволяя выкупать их многократно, открывая множество возможностей для взаимодействия НФТ с реальным миром.

ERC-6672: Многоразовый НФТ

Пример применения

Анализ интерфейса

pragma solidity ^0.8.16;

/// @title ERC-6672 Multi-Redeemable NFT Standard
/// @dev See https://eips.ethereum.org/EIPS/eip-6672
/// Note: the ERC-165 identifier for this interface is 0x4dddf83f.
interface IERC6672 /* is IERC721 */ {
    /// @dev This event emits when an NFT is redeemed.
    event Redeem(
        address indexed _operator,
        uint256 indexed _tokenId,
        address redeemer,
        bytes32 _redemptionId,
        string _memo
    );

    /// @dev This event emits when a redemption is canceled.
    event Cancel(
      address indexed _operator,
      uint256 indexed _tokenId,
      bytes32 _redemptionId,
      string _memo
    );

    /// @notice Check whether an NFT is already used for redemption or not.
    /// @dev 
    /// @param _operator The address of the operator of the redemption platform.
    /// @param _redemptionId The identifier for a redemption.
    /// @param _tokenId The identifier for an NFT.
    /// @return Whether an NFT is already redeemed or not.
    function isRedeemed(address _operator, bytes32 _redemptionId, uint256 _tokenId) external view returns (bool);

    /// @notice List the redemptions created by the given operator for the given NFT.
    /// @dev
    /// @param _operator The address of the operator of the redemption platform.
    /// @param _tokenId The identifier for an NFT.
    /// @return List of redemptions of speficic `_operator` and `_tokenId`.
    function getRedemptionIds(address _operator, uint256 _tokenId) external view returns (bytes32[]);
    
    /// @notice Redeem an NFT
    /// @dev
    /// @param _redemptionId The identifier created by the operator for a redemption.
    /// @param _tokenId The NFT to redeem.
    /// @param _memo
    function redeem(bytes32 _redemptionId, uint256 _tokenId, string _memo) external;

    /// @notice Cancel a redemption
    /// @dev
    /// @param _redemptionId The redemption to cancel.
    /// @param _tokenId The NFT to cancel the redemption.
    /// @param _memo
    function cancel(bytes32 _redemptionId, uint256 _tokenId, string _memo) external;
}

Заключение