ERC721PermitHash

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State Variables

PERMIT_TYPEHASH

Value is equal to keccak256("Permit(address spender,uint256 tokenId,uint256 nonce,uint256 deadline)");

bytes32 constant PERMIT_TYPEHASH = 0x49ecf333e5b8c95c40fdafc95c1ad136e8914a8fb55e9dc8bb01eaa83a2df9ad;

PERMIT_FOR_ALL_TYPEHASH

Value is equal to keccak256("PermitForAll(address operator,bool approved,uint256 nonce,uint256 deadline)");

bytes32 constant PERMIT_FOR_ALL_TYPEHASH = 0x6673cb397ee2a50b6b8401653d3638b4ac8b3db9c28aa6870ffceb7574ec2f76;

Functions

hashPermit

Hashes the data that will be signed for IERC721Permit_v4.permit()

function hashPermit(address spender, uint256 tokenId, uint256 nonce, uint256 deadline)
    internal
    pure
    returns (bytes32 digest);

Parameters

Name	Type	Description
spender	address	The address which may spend the tokenId
tokenId	uint256	The tokenId of the owner, which may be spent by spender
nonce	uint256	A unique non-ordered value for each signature to prevent replay attacks
deadline	uint256	The time at which the signature expires

Returns

Name	Type	Description
digest	bytes32	The hash of the data to be signed; the equivalent to keccak256(abi.encode(PERMIT_TYPEHASH, spender, tokenId, nonce, deadline));

hashPermitForAll

Hashes the data that will be signed for IERC721Permit_v4.permit()

function hashPermitForAll(address operator, bool approved, uint256 nonce, uint256 deadline)
    internal
    pure
    returns (bytes32 digest);

Parameters

Name	Type	Description
operator	address	The address which may spend any of the owner's tokenIds
approved	bool	true if the operator is to have full permission over the owner's tokenIds; false otherwise
nonce	uint256	A unique non-ordered value for each signature to prevent replay attacks
deadline	uint256	The time at which the signature expires

Returns

Name	Type	Description
digest	bytes32	The hash of the data to be signed; the equivalent to keccak256(abi.encode(PERMIT_FOR_ALL_TYPEHASH, operator, approved, nonce, deadline));