🗒️ERC-20 스마트 계약

ERC-20 스마트 계약을 사용자 지정 및 사용하여 토큰 생성

나만의 토큰 생성

모범 사례로 ERC-20 표준 템플릿을 사용하여 나만의 토큰을 생성하도록 선택할 수 있습니다. 다음 스마트 계약을 선택한 코드 편집기에서 사용하고, 암호화폐를 사용자 지정하고, 원하는 디지털 지갑(여기서는 MetaMask 지갑을 사용합니다)을 사용하여 연결을 승인한 다음 코드를 컴파일합니다.

ERC-20 스마트 계약

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.16;

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address to, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address from, address to, uint256 amount) external returns (bool);
}

contract SampleERC20Token is IERC20 {
    string public symbol;
    string public  name;
    uint8 public decimals;
    uint public _totalSupply;
    mapping(address => uint) balances;
    mapping(address => mapping(address => uint)) allowed;

    constructor() {
        symbol = "SYM";
        name = "Sample ERC20 Token";
        decimals = 2;
        _totalSupply = 100000;
        balances[msg.sender] = _totalSupply;
        emit Transfer(address(0), msg.sender, _totalSupply);
    }
    function totalSupply() external view returns (uint) {
        return _totalSupply  - balances[address(0)];
    }
    function balanceOf(address tokenOwner) external view returns (uint balance) {
        return balances[tokenOwner];
    }
    function transfer(address to, uint tokens) public returns (bool success) {
        balances[msg.sender] = balances[msg.sender] - tokens;
        balances[to] = balances[to] + tokens;
        emit Transfer(msg.sender, to, tokens);
        return true;
    }
    function approve(address spender, uint tokens) public returns (bool success) {
        allowed[msg.sender][spender] = tokens;
        emit Approval(msg.sender, spender, tokens);
        return true;
    }
    function transferFrom(address from, address to, uint tokens) public returns (bool success) {
        balances[from] = balances[from] - tokens;
        allowed[from][msg.sender] = allowed[from][msg.sender] - tokens;
        balances[to] = balances[to] + tokens;
        emit Transfer(from, to, tokens);
        return true;
    }
    function allowance(address tokenOwner, address spender) external view returns (uint remaining) {
        return allowed[tokenOwner][spender];
    }
}