This tutorial is meant for those with a basic knowledge of Ethereum and smart contracts, who have some knowledge of Solidity.
The purpose of building this blog is to write down the detailed operation history and my memo for learning the dApps and solidity programming.
If you are also interested and want to get hands dirty, just follow these steps below and have fun!~

전제 조건

Remix 계약 테스트용

Ethereum 및 Solidity의 기본 지식

create2 opcode는 계약이 배포될 계약 주소를 예측할 수 있는 기능을 제공합니다. 이는 사용자 온보딩 및 확장성을 개선할 수 있는 많은 가능성을 열어줍니다.

계약 개요

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.14;
//Use Create2 to know contract address before it is deployed.
contract DeployWithCreate2 {
    address public owner;
    constructor(address _owner) {
        owner = _owner;
    }
}
contract Create2Factory {
    event Deploy(address addr);
    // to deploy another contract using owner address and salt specified
    function deploy(uint _salt) external {
        DeployWithCreate2 _contract = new DeployWithCreate2{
            salt: bytes32(_salt)    // the number of salt determines the address of the contract that will be deployed
        }(msg.sender);
        emit Deploy(address(_contract));
    }

    // get the computed address before the contract DeployWithCreate2 deployed using Bytecode of contract DeployWithCreate2 and salt specified by the sender
    function getAddress(bytes memory bytecode, uint _salt) public view returns (address) {
        bytes32 hash = keccak256(
            abi.encodePacked(
                bytes1(0xff), address(this), _salt, keccak256(bytecode)
            )
        );
        return address (uint160(uint(hash)));
    }
    // get the ByteCode of the contract DeployWithCreate2
    function getBytecode(address _owner) public pure returns (bytes memory) {
        bytes memory bytecode = type(DeployWithCreate2).creationCode;
        return abi.encodePacked(bytecode, abi.encode(_owner));
    }
}

We use Create2Factory to deploy the contract DeployWithCreate2. First we get the byteCode of the contract DeployWithCreate2 using the function getBytecode, and then we use byteCode and owner-specified salt to compute the address of contract DeployWithCreate2. Finally we use function deploy to deploy the contract DeployWithCreate2 to see the actuall contract address.

계약 테스트 단계

getBytecode

getAddress

동일한 솔트 값으로 배포

로그 확인

logs    [
    {
        "from": "0xDA0bab807633f07f013f94DD0E6A4F96F8742B53",
        "topic": "0x55ea6c6b31543d8e2ec6a72f71a79c0f4b72ed0d4757172b043d8f4f4cd84848",
        "event": "Deploy",
        "args": {
            "0": "0x0B4f6a49C6a97B5dBB62F8A594cDefe5EabB4658",
            "addr": "0x0B4f6a49C6a97B5dBB62F8A594cDefe5EabB4658"
        }
    }

Git 저장소

소스 코드(Create2.sol 또는 Example-44)를 위한 Git 저장소를 방문하신 것을 환영합니다. 아래에 메시지를 남기거나 제 프로필에 있는 이메일을 통해 저에게 연락 주시기 바랍니다.

고맙습니다!

hyc0812 / 견고성 필수 요소

솔리디티 프로그래밍 베이비 예제...

솔리디티-베이비 스텝스...

Solidity를 얻는 가장 좋은 방법은 예제에 접근하는 것입니다.
다음은 아기의 예입니다. 하나씩 입력하는 것이 좋습니다.
참조:
EnglishAuction 사용 및 테스트에 대한 설명입니다.
examples

예시-1

updateBalance 및 getBalance

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;

contract MyLedger {
    mapping(address => uint) public balances;
    function updateBalance(uint newBal) public {
        balances[msg.sender] = newBal;
    }
    function getBalance() public view returns(uint) {
        return balances[msg.sender];
    }
}

예시-2

Square에서 상속됨

// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.7.0 <0.9.0;

import "@openzeppelin/contracts/utils/Strings.sol";

contract Shape {
    uint height;
    uint width;

    constructor(uint _height, uint _width) {
        height = _height;
        width = _width;
    }
}

contract Square is Shape {
    constructor(uint h, uint w) Shape(h, w) {}

    function getHeight() 

…


View on GitHub

참조

https://docs.openzeppelin.com/cli/2.8/deploying-with-create2

https://blog.openzeppelin.com/getting-the-most-out-of-create2/