ERC721Permit
ERC721 with permit
Nonfungible tokens that support an approve via signature, i.e. permit
Variables
bytes32 PERMIT_TYPEHASH constant
The permit typehash used in the permit signature
Developer note: Value is equal to keccak256("Permit(address spender,uint256 tokenId,uint256 nonce,uint256 deadline)");
Functions
DOMAIN_SEPARATOR
function DOMAIN_SEPARATOR() public view returns (bytes32) view public
The domain separator used in the permit signature
Returns:
[0]
bytes32
The domain separator used in encoding of permit signature
permit
function permit(address spender, uint256 tokenId, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external payable payable external
Approve of a specific token ID for spending by spender via signature
spender
address
The account that is being approved
tokenId
uint256
The ID of the token that is being approved for spending
deadline
uint256
The deadline timestamp by which the call must be mined for the approve to work
v
uint8
Must produce valid secp256k1 signature from the holder along with `r` and `s`
r
bytes32
Must produce valid secp256k1 signature from the holder along with `v` and `s`
s
bytes32
Must produce valid secp256k1 signature from the holder along with `r` and `v`