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EIP7702Utils #5587

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EIP7702Utils #5587

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5c238e7
EIP7702Utils
Amxx Mar 17, 2025
dbd74f9
Update EIP7702Utils.sol
Amxx Mar 26, 2025
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22 changes: 22 additions & 0 deletions contracts/account/utils/EIP7702Utils.sol
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// SPDX-License-Identifier: MIT

pragma solidity ^0.8.20;

/**
* @dev Library with common EIP-7702 utility functions.
*
* See https://eips.ethereum.org/EIPS/eip-7702[ERC-7702].
*/
library EIP7702Utils {
bytes3 internal constant EIP7702_PREFIX = 0xef0100;

/**
* @dev Returns the address of the delegate if `account` as an EIP-7702 delegation setup, or address(0) otherwise.
*/
function fetchDelegate(address account) internal view returns (address) {
bytes23 delegation = bytes23(account.code);
return bytes3(delegation) == EIP7702_PREFIX
? address(bytes20(delegation << 24))
: address(0);
}
}
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