@mudgen

Did you know that keccak256 of string literals are evaluated at compile time and replaced with the result by the Solidity optimizer? So for example you could put something like the following in the middle of a function without worrying that it will cost gas to evaluate every time the function is called: `keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")`

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