33 lines
1.4 KiB
Solidity
33 lines
1.4 KiB
Solidity
// SPDX-License-Identifier: GPL-2.0-or-later
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pragma solidity >=0.7.5;
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import '@openzeppelin/contracts/token/ERC721/IERC721.sol';
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/// @title ERC721 with permit
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/// @notice Extension to ERC721 that includes a permit function for signature based approvals
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interface IERC721Permit is IERC721 {
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/// @notice The permit typehash used in the permit signature
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/// @return The typehash for the permit
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function PERMIT_TYPEHASH() external pure returns (bytes32);
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/// @notice The domain separator used in the permit signature
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/// @return The domain seperator used in encoding of permit signature
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function DOMAIN_SEPARATOR() external view returns (bytes32);
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/// @notice Approve of a specific token ID for spending by spender via signature
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/// @param spender The account that is being approved
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/// @param tokenId The ID of the token that is being approved for spending
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/// @param deadline The deadline timestamp by which the call must be mined for the approve to work
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/// @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
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/// @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
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/// @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
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function permit(
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address spender,
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uint256 tokenId,
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uint256 deadline,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external payable;
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}
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