forked from DecentralizedClimateFoundation/DCIPs
62 lines
1.5 KiB
Solidity
62 lines
1.5 KiB
Solidity
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/*
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IERC721Holder
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SPDX-License-Identifier: CC0-1.0
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*/
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import "@openzeppelin/contracts/interfaces/IERC165.sol";
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pragma solidity ^0.8.0;
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/**
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* @notice the ERC721 holder standard provides a common interface to query
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* token ownership and balance information
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*/
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interface IERC721Holder is IERC165 {
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/**
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* @notice emitted when the token is transferred to the contract
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* @param owner functional token owner
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* @param tokenAddress held token address
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* @param tokenId held token ID
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*/
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event Hold(
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address indexed owner,
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address indexed tokenAddress,
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uint256 indexed tokenId
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);
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/**
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* @notice emitted when the token is released back to the user
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* @param owner functional token owner
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* @param tokenAddress held token address
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* @param tokenId held token ID
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*/
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event Release(
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address indexed owner,
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address indexed tokenAddress,
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uint256 indexed tokenId
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);
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/**
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* @notice get the functional owner of a held token
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* @param tokenAddress held token address
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* @param tokenId held token ID
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* @return functional token owner
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*/
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function heldOwnerOf(address tokenAddress, uint256 tokenId)
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external
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view
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returns (address);
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/**
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* @notice get the held balance of the token owner
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* @param tokenAddress held token address
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* @param owner functional token owner
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* @return held token balance
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*/
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function heldBalanceOf(address tokenAddress, address owner)
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external
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view
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returns (uint256);
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}
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