forked from DecentralizedClimateFoundation/DCIPs
31 lines
1.5 KiB
Solidity
31 lines
1.5 KiB
Solidity
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// SPDX-License-Identifier: CC0-1.0
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pragma solidity 0.8.11;
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import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
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/// @title ERC-721 Consumer Role extension
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/// Note: the ERC-165 identifier for this interface is 0x953c8dfa
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interface IERC721Consumable is IERC721 {
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/// @notice Emitted when `owner` changes the `consumer` of an NFT
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/// The zero address for consumer indicates that there is no consumer address
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/// When a Transfer event emits, this also indicates that the consumer address
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/// for that NFT (if any) is set to none
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event ConsumerChanged(address indexed owner, address indexed consumer, uint256 indexed tokenId);
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/// @notice Get the consumer address of an NFT
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/// @dev The zero address indicates that there is no consumer
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/// Throws if `_tokenId` is not a valid NFT
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/// @param _tokenId The NFT to get the consumer address for
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/// @return The consumer address for this NFT, or the zero address if there is none
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function consumerOf(uint256 _tokenId) view external returns (address);
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/// @notice Change or reaffirm the consumer address for an NFT
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/// @dev The zero address indicates there is no consumer address
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/// Throws unless `msg.sender` is the current NFT owner, an authorised
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/// operator of the current owner or approved address
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/// Throws if `_tokenId` is not valid NFT
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/// @param _consumer The new consumer of the NFT
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function changeConsumer(address _consumer, uint256 _tokenId) external;
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}
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