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IERC721Permit

Extension to ERC721 that includes a permit function for signature based approvals

Functions#

PERMIT_TYPEHASH#

function PERMIT_TYPEHASH(
) external returns (bytes32)

The permit typehash used in the permit signature

Return Values:#

TypeDescription
bytes32typehash for the permit

DOMAIN_SEPARATOR#

function DOMAIN_SEPARATOR(
) external returns (bytes32)

The domain separator used in the permit signature

Return Values:#

NameTypeDescription
Thedomain seperator used in encoding of permit signature

permit#

function permit(
address spender,
uint256 tokenId,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external

Approve of a specific token ID for spending by spender via signature

Parameters:#

NameTypeDescription
spenderaddressThe account that is being approved
tokenIduint256The ID of the token that is being approved for spending
deadlineuint256The deadline timestamp by which the call must be mined for the approve to work
vuint8Must produce valid secp256k1 signature from the holder along with r and s
rbytes32Must produce valid secp256k1 signature from the holder along with v and s
sbytes32Must produce valid secp256k1 signature from the holder along with r and v