사용목적 : 현재 Remix의 compile과 배포 부분을 local Testnet에서 진행하기 위함

Node.js, Truffle 설치 후

Terminal

truffle init
ls
cd contracts
ls
cd ..
pwd
ls
truffle create contract A
cd contracts
ls
cd ..
pwd
cd contracts
cat A.sol
vim A.sol

vscode로 이동 - A.sol

pragma solidity >=0.4.17 <0.9.0;

contract A {
  function add(uint _a, uint _b) public pure returns(uint) {
    return _a+_b;
  }
}

Terminal

cd contracts
truffle compile

truffle-config.js file

• 60번 줄 development 주석 해제

     host: "127.0.0.1",     // Localhost (default: none)
     port: 8545,            // Standard Ethereum port (default: none)
     network_id: "*",       // Any network (default: none)
    },

• compiler version 0.8.21 확인

compilers: {
    solc: {
      version: "0.8.21",

1. solidity compiler 0.8.19로 수정
2. truffle config.js development-port : 7545 -> 8545
3. truffle config.js 맨밑에 version 0.8.19로

terminal

• truffle migrate

A.sol file

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract A {
  function add(uint _a, uint _b) public pure returns(uint) {
    return _a+_b;
  }
}

1_A.js file

const A_con = artifacts.require("A");

module.exports = function(deployer) {
    deployer.deploy(A_con);
}

contract A와 require의 "A"
const A_con과 deploy의 (A_con)
일치하는지 확인

이후

1. `ganache 앱` → port 7545 설정
2. vscode > truffle-config.js > port 8545 설정
3. terminal > `ganache-cli` 실행 > 8545 확인
4. 새로운 터미널에서 contracts > truffle migrate

Terminal

npm install -g ganache-cli
ganache-cli --version
truffle migrate

Contract-Second.sol file 추가 & code

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract second_contract {
    uint public A;

  function add(uint _a, uint _b) public pure returns(uint) {
    return _a+_b;
  }

  function mul(uint _a, uint _b) public pure returns(uint) {
    return _a*_b;
  }

  function setA(uint _a) public {
    A = _a;
  }

  function getA() public view returns(uint) {
    return A;
  }
}

Contract-Third_con.sol 추가 & code

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract number3 {
    uint[] public numbers;

  function pushNumber(uint _n) public {
    numbers.push(_n);
  }

  function getNumber(uint _n) public view returns(uint) {
    return numbers[_n-1];
  }

  function getNumbers() public view returns(uint[] memory) {
    return numbers;
  }
}

migrations - 2_B.js file 추가 & code

const BBB = artifacts.require("second_contract");

module.exports = function (deployer) {
  deployer.deploy(BBB);
};

migrations - 3_C.js file 추가 & code

const CC = artifacts.require("number3");

module.exports = function (deployer) {
  deployer.deploy(CC);
};

Terminal

truffle compile 입력 후 json 뜨는지 확인

cd contracts
truffle migrate 입력 후 ganache에 transaction 여러개 뜨는지 확인

Second.sol file code 추가

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

contract second_contract {
    uint public A;

  function add(uint _a, uint _b) public pure returns(uint) {
    return _a+_b;
  }

  function mul(uint _a, uint _b) public pure returns(uint) {
    return _a*_b;
  }

  function setA(uint _a) public {
    A = _a;
  }

  function getA() public view returns(uint) {
    return A;
  }
}

contract last_contract {
    string public name;
    
    function setName(string calldata _name) public {
        name = _name;
    }
}

Terminal

truffle compile 후 last_contract.json 뜨는지 확인

migrations에 추가한 contract 포함하지 않으면 compile 안 됨

Ganache

톱니바퀴 설정모양 클릭 - Add project 클릭 - truffle-config.js file 업로드 - Save & Restart 클릭 - Contract에 4개 뜨는지 확인

migrations - 2_B.js code 추가

const BBB = artifacts.require("second_contract");
const BBB2 = artifacts.require("last_contract");

module.exports = function (deployer) {
  deployer.deploy(BBB);
  deployer.deploy(BBB2);
};

이후 terminal에서 truffle migrate 후 ganache contracts-last contract 뜨는지 확인

local에서 함수 실행

• truffle console 입력 - truffle(development) 뜨는지 확인
• A_con -> A_con is not defined
• let a_con = await A_con.deployed() -> error
• let a_con = await A.deployed()
• a_con.add(3,5) -> 8뜨는지 확인
• a_con.add(10,10) -> 20
• let b1 = await second_contract.deployed() -> undefined
• b1.add(10,20) -> 30
• b1.setA(15) -> tx 초록색 빠바박!!!!
• b1.setA(59) -> Ganache second contract uint 41 뜨는지 확인

30인풋했는데 24 뜨면?

24 = 10+14
앞에 있는 10은 10진수, 뒤에 있는 14는 16진수
-> 10 (10진수) + 14(16진수) = 24