IERC2612Permit

Git Source

Functions

permit

*Sets amount as the allowance of spender over owner's tokens, given owner's signed approval. IMPORTANT: The same issues IERC20-approve has related to transaction ordering also apply here. Emits an {Approval} event. Requirements:

  • owner cannot be the zero address.
  • spender cannot be the zero address.
  • deadline must be a timestamp in the future.
  • v, r and s must be a valid secp256k1 signature from owner over the EIP712-formatted function arguments.
  • the signature must use owner's current nonce (see {nonces}). For more information on the signature format, see the https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP section].*
function permit(address owner, address spender, uint256 amount, uint256 deadline, uint8 v, bytes32 r, bytes32 s)
    external;

nonces

Returns the current ERC2612 nonce for owner. This value must be included whenever a signature is generated for permit. Every successful call to {permit} increases owner's nonce by one. This prevents a signature from being used multiple times.

function nonces(address owner) external view returns (uint256);