CREATE2 and CREATE

create.t.sol

pragma solidity ^0.8.13;

import "forge-std/Test.sol";

import {TokenTemplate} from "../src/TokenTemplate.sol";

contract Create2Test is Test {
    function setUp() public {}

    function testDeploy() public {
        uint256 _salt = 1;
        bytes32 hash = keccak256(
            abi.encodePacked(
                bytes1(0xff),
                address(this),
                _salt,
                keccak256(type(TokenTemplate).creationCode)
            )
        );

        address preAddr = address(uint160(uint(hash)));
        address actuallyAddr = deploy(type(TokenTemplate).creationCode, _salt);

        assert(preAddr == actuallyAddr);
    }

    function deploy(
        bytes memory bytecode,
        uint _salt
    ) public payable returns (address) {
        address addr;

        assembly {
            addr := create2(
                callvalue(), // wei sent with current call
                // Actual code starts after skipping the first 32 bytes
                add(bytecode, 0x20),
                mload(bytecode), // Load the size of code contained in the first 32 bytes
                _salt // Salt from function arguments
            )

            if iszero(extcodesize(addr)) {
                revert(0, 0)
            }
        }

        return addr;
    }
}