hyperlane-monorepo/solidity/contracts/libs/MinimalProxy.sol

// SPDX-License-Identifier: MIT OR Apache-2.0
pragma solidity >=0.6.11;

// Library for building bytecode of minimal proxies (see https://eips.ethereum.org/EIPS/eip-1167)
library MinimalProxy {
    bytes20 private constant PREFIX =
        hex"3d602d80600a3d3981f3363d3d373d3d3d363d73";
    bytes15 private constant SUFFIX = hex"5af43d82803e903d91602b57fd5bf3";

    function create(address implementation) internal returns (address proxy) {
        bytes memory _bytecode = bytecode(implementation);
        assembly {
            proxy := create(0, add(_bytecode, 32), mload(_bytecode))
        }
    }

    function bytecode(
        address implementation
    ) internal pure returns (bytes memory) {
        return abi.encodePacked(PREFIX, bytes20(implementation), SUFFIX);
    }
}