3N9tKixzqTYWnEXQxrDQ5pBTGvQd6sFsvmV · data · DUyaSEbRwAcot7og5tbdLCPfQ19RWMgYkunG7F4i1dSC_3jP6JfYe3qCG8UmG5mfMf7bfrk6BF7av4hH68WNikFrE_result_chatgpt
{
"DUyaSEbRwAcot7og5tbdLCPfQ19RWMgYkunG7F4i1dSC_3jP6JfYe3qCG8UmG5mfMf7bfrk6BF7av4hH68WNikFrE_result_chatgpt": "Certainly! Here is an example EVM (Ethereum Virtual Machine) contract creation code snippet for creating a standard ERC-20 token on the Ethereum blockchain:
```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, 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 sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract MyToken is IERC20 {
string public constant name = "My Token";
string public constant symbol = "MT";
uint8 public constant decimals = 18;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
constructor(uint256 initialSupply) {
_totalSupply = initialSupply * (10 ** decimals);
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(_balances[sender] >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] -= amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
```
This basic contract defines the functionalities and events required for an ERC-20 token. Remember that before deploying a contract on mainnet or any Ethereum network, you should ensure thorough testing and auditing to secure your smart contract."
}
Changelog:
{
"2024.04.10 22:35": "Certainly! Here is an example EVM (Ethereum Virtual Machine) contract creation code snippet for creating a standard ERC-20 token on the Ethereum blockchain:
```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, 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 sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract MyToken is IERC20 {
string public constant name = "My Token";
string public constant symbol = "MT";
uint8 public constant decimals = 18;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
constructor(uint256 initialSupply) {
_totalSupply = initialSupply * (10 ** decimals);
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender] - amount);
return true;
}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
require(_balances[sender] >= amount, "ERC20: transfer amount exceeds balance");
_balances[sender] -= amount;
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function _approve(address owner, address spender, uint256 amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
```
This basic contract defines the functionalities and events required for an ERC-20 token. Remember that before deploying a contract on mainnet or any Ethereum network, you should ensure thorough testing and auditing to secure your smart contract."
}
