Contract Source Code:
File 1 of 1 : ERC20
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.7;
interface IERC20 {
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
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);
}
interface IUniswapRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
interface IUniswapFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
abstract contract Ownable {
address internal _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = msg.sender;
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == msg.sender, "you are not owner");
_;
}
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "new is 0");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
contract ERC20 is IERC20, Ownable {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
address public expenseAddress;
string private _name;
string private _symbol;
uint8 private _decimals;
mapping(address => bool) public _isExcludeFromFee;
uint256 private _totalSupply;
IUniswapRouter public _uniswapRouter;
mapping(address => bool) public isMarketPair;
bool private inSwap;
uint256 private constant MAX = ~uint256(0);
uint256 public _buyFee = 0;
uint256 public _sellFee = 0;
address public _uniswapPair;
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
constructor (){
_name = "DubaiPay";
_symbol = "DPAY";
_decimals = 18;
uint256 Supply = 10000000;
IUniswapRouter swapRouter = IUniswapRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
_uniswapRouter = swapRouter;
_allowances[address(this)][address(swapRouter)] = MAX;
IUniswapFactory swapFactory = IUniswapFactory(swapRouter.factory());
address swapPair = swapFactory.createPair(address(this), swapRouter.WETH());
_uniswapPair = swapPair;
isMarketPair[swapPair] = true;
_totalSupply = Supply * 10 ** _decimals;
address receiveAddr = msg.sender;
_balances[receiveAddr] = _totalSupply;
emit Transfer(address(0), receiveAddr, _totalSupply);
expenseAddress = receiveAddr;
_isExcludeFromFee[address(this)] = true;
_isExcludeFromFee[address(swapRouter)] = true;
// _isExcludeFromFee[msg.sender] = true;
_isExcludeFromFee[receiveAddr] = true;
_isExcludeFromFee[expenseAddress] = true;
}
function setExpenseAddress(address newAddr) public onlyOwner{
expenseAddress = newAddr;
}
function symbol() external view override returns (string memory) {
return _symbol;
}
function name() external view override returns (string memory) {
return _name;
}
function decimals() external view override 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 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);
if (_allowances[sender][msg.sender] != MAX) {
_allowances[sender][msg.sender] = _allowances[sender][msg.sender] - amount;
}
return true;
}
function setBuyFee(uint256 newFundFee) public onlyOwner{
_buyFee = newFundFee;
require(_buyFee <= 15,"too high");
}
function setSellFee(uint256 newFundFee) public onlyOwner{
_sellFee = newFundFee;
require(_sellFee <= 15,"too high");
}
function _approve(address owner, address spender, uint256 amount) private {
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function _transfer(
address from,
address to,
uint256 amount
) private {
uint256 balance = balanceOf(from);
require(balance >= amount, "balanceNotEnough");
bool takeFee;
bool sellFlag;
if (isMarketPair[to] && !inSwap && !_isExcludeFromFee[from] && !_isExcludeFromFee[to]) {
uint256 contractTokenBalance = balanceOf(address(this));
if (contractTokenBalance > 0) {
uint256 numTokensSellToFund = amount;
numTokensSellToFund = numTokensSellToFund > contractTokenBalance ?
contractTokenBalance:numTokensSellToFund;
swapTokenForETH(numTokensSellToFund);
}
}
if (!_isExcludeFromFee[from] && !_isExcludeFromFee[to] && !inSwap) {
require(trading,"!trading");
takeFee = true;
}
if (isMarketPair[to]) { sellFlag = true; }
_transferToken(from, to, amount, takeFee, sellFlag);
}
bool public trading;
function enableTrading() public onlyOwner{
require(!trading);
trading = true;
}
function _transferToken(
address sender,
address recipient,
uint256 tAmount,
bool takeFee,
bool sellFlag
) private {
_balances[sender] = _balances[sender] - tAmount;
uint256 feeAmount;
if (takeFee) {
uint256 taxFee;
if (sellFlag) {
taxFee = _sellFee;
} else {
taxFee = _buyFee;
}
uint256 swapAmount = tAmount * taxFee / 100;
if (swapAmount > 0) {
feeAmount += swapAmount;
_balances[address(this)] = _balances[address(this)] + swapAmount;
emit Transfer(sender, address(this), swapAmount);
}
}
_balances[recipient] = _balances[recipient] + (tAmount - feeAmount);
emit Transfer(sender, recipient, tAmount - feeAmount);
}
event catchEvent(uint8);
function swapTokenForETH(uint256 tokenAmount) private lockTheSwap {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniswapRouter.WETH();
try _uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(expenseAddress),
block.timestamp
) {} catch { emit catchEvent(0); }
}
function setIsExcludeFromFees(address account, bool value) public onlyOwner{
_isExcludeFromFee[account] = value;
}
receive() external payable {}
}