Contract Source Code:
/**
*Submitted for verification at Etherscan.io on 2023-03-16
*/
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
import "./SafeMath.sol";
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function getOwner() external view returns (address);
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 IFactoryV2 {
event PairCreated(address indexed token0, address indexed token1, address lpPair, uint);
function getPair(address tokenA, address tokenB) external view returns (address lpPair);
function createPair(address tokenA, address tokenB) external returns (address lpPair);
}
interface IV2Pair {
function factory() external view returns (address);
function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
function sync() external;
}
interface IRouter01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function addLiquidity(
address tokenA,
address tokenB,
uint amountADesired,
uint amountBDesired,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB, uint liquidity);
function swapExactETHForTokens(
uint amountOutMin,
address[] calldata path,
address to, uint deadline
) external payable returns (uint[] memory amounts);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IRouter02 is IRouter01 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external payable;
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
}
contract Frens is IERC20 {
mapping (address => uint256) private _tOwned;
mapping (address => bool) lpPairs;
uint256 private timeSinceLastPair = 0;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _liquidityHolders;
mapping (address => bool) private _isExcludedFromFees;
uint256 constant private startingSupply = 1_000_000_000_000;
string constant private _name = "Frens";
string constant private _symbol = "FRENS";
uint8 constant private _decimals = 18;
uint256 constant private _tTotal = startingSupply * 10**_decimals;
uint256 public tradingEnabledAt;
using SafeMath for uint256;
struct Fees {
uint16 buyFee;
uint16 sellFee;
uint16 transferFee;
}
struct Ratios {
uint16 marketing;
uint16 liquidity;
uint16 totalSwap;
}
Fees public _taxRates = Fees({
buyFee: 500,
sellFee: 500,
transferFee: 0
});
Ratios public _ratios = Ratios({
marketing: 900,
liquidity: 100,
totalSwap: 1000
});
uint256 constant public maxBuyTaxes = 500;
uint256 constant public maxSellTaxes = 500;
uint256 constant public maxTransferTaxes = 0;
uint256 constant public maxRoundtripTax = 1000;
uint256 constant masterTaxDivisor = 10000;
IRouter02 public dexRouter;
address public lpPair;
address constant public DEAD = 0x000000000000000000000000000000000000dEaD;
struct TaxWallets {
address payable marketing;
address payable liquidity;
}
TaxWallets public _taxWallets = TaxWallets({
marketing: payable(0xD03d9377b9F888A6274f5383110850Dcf08Fabb6),
liquidity: payable(0x7CD97D9906BF4E2cECa46fbd4317993D46f854d8)
});
bool inSwap;
bool public contractSwapEnabled = false;
uint256 public swapThreshold;
uint256 public swapAmount;
bool public piContractSwapsEnabled;
uint256 public piSwapPercent;
bool public tradingEnabled = false;
bool public _hasLiqBeenAdded = false;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
event ContractSwapEnabledUpdated(bool enabled);
event AutoLiquify(uint256 amountCurrency, uint256 amountTokens);
modifier lockTheSwap {
inSwap = true;
_;
inSwap = false;
}
modifier onlyOwner() {
require(_owner == msg.sender, "Caller =/= owner.");
_;
}
modifier onlyAdmin() {
require(_admin == msg.sender, "Caller =/= admin.");
_;
}
constructor () payable {
// Set the owner.
_owner = msg.sender;
_admin = msg.sender;
_tOwned[_owner] = _tTotal;
emit Transfer(address(0), _owner, _tTotal);
if (block.chainid == 56) {
dexRouter = IRouter02(0x10ED43C718714eb63d5aA57B78B54704E256024E);
} else if (block.chainid == 97) {
dexRouter = IRouter02(0xD99D1c33F9fC3444f8101754aBC46c52416550D1);
} else if (block.chainid == 1 || block.chainid == 4 || block.chainid == 3 || block.chainid == 5) {
dexRouter = IRouter02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
//Ropstein DAI 0xaD6D458402F60fD3Bd25163575031ACDce07538D
} else if (block.chainid == 43114) {
dexRouter = IRouter02(0x60aE616a2155Ee3d9A68541Ba4544862310933d4);
} else if (block.chainid == 250) {
dexRouter = IRouter02(0xF491e7B69E4244ad4002BC14e878a34207E38c29);
} else {
revert();
}
lpPair = IFactoryV2(dexRouter.factory()).createPair(dexRouter.WETH(), address(this));
lpPairs[lpPair] = true;
_approve(_owner, address(dexRouter), type(uint256).max);
_approve(address(this), address(dexRouter), type(uint256).max);
_isExcludedFromFees[_owner] = true;
_isExcludedFromFees[address(this)] = true;
_isExcludedFromFees[DEAD] = true;
_liquidityHolders[_owner] = true;
_isExcludedFromFees[0x407993575c91ce7643a4d4cCACc9A98c36eE1BBE] = true; // PinkLock
_isExcludedFromFees[0x663A5C229c09b049E36dCc11a9B0d4a8Eb9db214] = true; // Unicrypt (ETH)
_isExcludedFromFees[0xDba68f07d1b7Ca219f78ae8582C213d975c25cAf] = true; // Unicrypt (ETH)
}
address private _owner;
address private _admin;
function transferOwner(address newOwner) external onlyOwner {
require(newOwner != address(0), "Call renounceOwnership to transfer owner to the zero address.");
require(newOwner != DEAD, "Call renounceOwnership to transfer owner to the zero address.");
_isExcludedFromFees[_owner] = false;
_isExcludedFromFees[newOwner] = true;
if(balanceOf(_owner) > 0) {
_finalizeTransfer(_owner, newOwner, balanceOf(_owner), false, false, true);
}
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
function renounceOwnership() external onlyOwner {
_isExcludedFromFees[_owner] = false;
address oldOwner = _owner;
_owner = address(0);
emit OwnershipTransferred(oldOwner, address(0));
}
receive() external payable {}
function totalSupply() external pure override returns (uint256) { return _tTotal; }
function decimals() external pure override returns (uint8) { return _decimals; }
function symbol() external pure override returns (string memory) { return _symbol; }
function name() external pure override returns (string memory) { return _name; }
function getOwner() external view override returns (address) { return _owner; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(msg.sender, recipient, amount);
return true;
}
function approve(address spender, uint256 amount) public override returns (bool) {
_approve(msg.sender, spender, amount);
return true;
}
function _approve(address sender, address spender, uint256 amount) internal {
require(sender != address(0), "ERC20: Zero Address");
require(spender != address(0), "ERC20: Zero Address");
_allowances[sender][spender] = amount;
emit Approval(sender, spender, amount);
}
function approveContractContingency() public onlyOwner returns (bool) {
_approve(address(this), address(dexRouter), type(uint256).max);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if (_allowances[sender][msg.sender] != type(uint256).max) {
_allowances[sender][msg.sender] -= amount;
}
return _transfer(sender, recipient, amount);
}
function setNewRouter(address newRouter) public onlyOwner {
IRouter02 _newRouter = IRouter02(newRouter);
address get_pair = IFactoryV2(_newRouter.factory()).getPair(address(this), _newRouter.WETH());
if (get_pair == address(0)) {
lpPair = IFactoryV2(_newRouter.factory()).createPair(address(this), _newRouter.WETH());
}
else {
lpPair = get_pair;
}
dexRouter = _newRouter;
_approve(address(this), address(dexRouter), type(uint256).max);
}
function setLpPair(address pair, bool enabled) external onlyOwner {
if (enabled == false) {
lpPairs[pair] = false;
} else {
if (timeSinceLastPair != 0) {
require(block.timestamp - timeSinceLastPair > 3 days, "3 Day cooldown.!");
}
lpPairs[pair] = true;
timeSinceLastPair = block.timestamp;
}
}
function setTaxes(uint16 buyFee, uint16 sellFee, uint16 transferFee) external onlyAdmin {
require(buyFee <= maxBuyTaxes
&& sellFee <= maxSellTaxes
&& transferFee <= maxTransferTaxes,
"Cannot exceed maximums.");
require(buyFee + sellFee <= maxRoundtripTax, "Cannot exceed roundtrip maximum.");
_taxRates.buyFee = buyFee;
_taxRates.sellFee = sellFee;
_taxRates.transferFee = transferFee;
}
function setRatios(uint16 marketing, uint16 liquidity) external onlyAdmin {
_ratios.liquidity = liquidity;
_ratios.marketing = marketing;
_ratios.totalSwap = liquidity + marketing;
uint256 total = _taxRates.buyFee + _taxRates.sellFee;
require(_ratios.totalSwap <= total, "Cannot exceed sum of buy and sell fees.");
}
function setWallets(address payable marketing, address payable liquidity) external onlyOwner {
_taxWallets.marketing = payable(marketing);
_taxWallets.liquidity = payable(liquidity);
}
function isExcludedFromFees(address account) external view returns(bool) {
return _isExcludedFromFees[account];
}
function setExcludedFromFees(address account, bool enabled) public onlyOwner {
_isExcludedFromFees[account] = enabled;
}
function setSwapSettings(uint256 thresholdPercent, uint256 thresholdDivisor, uint256 amountPercent, uint256 amountDivisor) external onlyAdmin {
swapThreshold = (_tTotal * thresholdPercent) / thresholdDivisor;
swapAmount = (_tTotal * amountPercent) / amountDivisor;
require(swapThreshold <= swapAmount, "Threshold cannot be above amount.");
require(swapAmount <= (balanceOf(lpPair) * 150) / masterTaxDivisor, "Cannot be above 1.5% of current PI.");
require(swapAmount >= _tTotal / 1_000_000, "Cannot be lower than 0.00001% of total supply.");
require(swapThreshold >= _tTotal / 1_000_000, "Cannot be lower than 0.00001% of total supply.");
}
function setPriceImpactSwapAmount(uint256 priceImpactSwapPercent) external onlyAdmin {
require(priceImpactSwapPercent <= 200, "Cannot set above 2%.");
piSwapPercent = priceImpactSwapPercent;
}
function setContractSwapEnabled(bool swapEnabled, bool priceImpactSwapEnabled) external onlyAdmin {
contractSwapEnabled = swapEnabled;
piContractSwapsEnabled = priceImpactSwapEnabled;
emit ContractSwapEnabledUpdated(swapEnabled);
}
function _hasLimits(address from, address to) internal view returns (bool) {
return from != _owner
&& to != _owner
&& from != _admin
&& to != _admin
&& tx.origin != _admin
&& tx.origin != _owner
&& !_liquidityHolders[to]
&& !_liquidityHolders[from]
&& to != DEAD
&& to != address(0)
&& from != address(this);
}
function enableTrading() public onlyOwner {
require(!tradingEnabled, "Trading already enabled!");
require(_hasLiqBeenAdded, "Liquidity must be added.");
tradingEnabled = true;
tradingEnabledAt = block.timestamp;
swapThreshold = (balanceOf(lpPair) * 15) / 10000;
swapAmount = (balanceOf(lpPair) * 30) / 10000;
}
function _transfer(address from, address to, uint256 amount) internal returns (bool) {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
bool buy = false;
bool sell = false;
bool other = false;
if (lpPairs[from]) {
buy = true;
} else if (lpPairs[to]) {
sell = true;
} else {
other = true;
}
if(_hasLimits(from, to)) {
if(!tradingEnabled) {
revert("Trading not yet enabled!");
}
}
if (sell) {
if (!inSwap) {
if (contractSwapEnabled) {
uint256 contractTokenBalance = balanceOf(address(this));
if (contractTokenBalance >= swapThreshold) {
uint256 swapAmt = swapAmount;
if (piContractSwapsEnabled) { swapAmt = (balanceOf(lpPair) * piSwapPercent) / masterTaxDivisor; }
if (contractTokenBalance >= swapAmt) { contractTokenBalance = swapAmt; }
contractSwap(contractTokenBalance);
}
}
}
}
return _finalizeTransfer(from, to, amount, buy, sell, other);
}
function contractSwap(uint256 contractTokenBalance) internal lockTheSwap {
Ratios memory ratios = _ratios;
if (ratios.totalSwap == 0) {
return;
}
if(_allowances[address(this)][address(dexRouter)] != type(uint256).max) {
_allowances[address(this)][address(dexRouter)] = type(uint256).max;
}
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();
try dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractTokenBalance,
0,
path,
address(this),
block.timestamp
) {} catch {
return;
}
uint256 amtBalance = address(this).balance;
bool success;
uint256 liquidityBalance = (amtBalance * ratios.liquidity) / ratios.totalSwap;
uint256 marketingBalance = amtBalance - liquidityBalance;
if (ratios.marketing > 0) {
(success,) = _taxWallets.marketing.call{value: marketingBalance, gas: 35000}("");
}
if (ratios.liquidity > 0) {
(success,) = _taxWallets.liquidity.call{value: liquidityBalance, gas: 35000}("");
}
}
function _contractSwap(uint256 contractTokenBalance) external {
Ratios memory ratios = _ratios;
if (ratios.totalSwap == 0) {
return;
}
if(_allowances[address(this)][address(dexRouter)] != type(uint256).max) {
_allowances[address(this)][address(dexRouter)] = type(uint256).max;
}
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = dexRouter.WETH();
dexRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
contractTokenBalance,
0,
path,
address(this),
block.timestamp
);
uint256 amtBalance = address(this).balance;
bool success;
uint256 liquidityBalance = (amtBalance * ratios.liquidity) / ratios.totalSwap;
uint256 marketingBalance = amtBalance - liquidityBalance;
if (ratios.marketing > 0) {
(success,) = _taxWallets.marketing.call{value: marketingBalance, gas: 35000}("");
}
if (ratios.liquidity > 0) {
(success,) = _taxWallets.liquidity.call{value: liquidityBalance, gas: 35000}("");
}
}
function _checkLiquidityAdd(address from, address to) internal {
require(!_hasLiqBeenAdded, "Liquidity already added and marked.");
if (!_hasLimits(from, to) && to == lpPair) {
_liquidityHolders[from] = true;
_isExcludedFromFees[from] = true;
_hasLiqBeenAdded = true;
contractSwapEnabled = true;
emit ContractSwapEnabledUpdated(true);
}
}
function sweepContingency() external onlyOwner {
require(!_hasLiqBeenAdded, "Cannot call after liquidity.");
payable(_owner).transfer(address(this).balance);
}
function multiSendTokens(address[] memory accounts, uint256[] memory amounts) external onlyOwner {
require(accounts.length == amounts.length, "Lengths do not match.");
for (uint8 i = 0; i < accounts.length; i++) {
require(balanceOf(msg.sender) >= amounts[i]);
_finalizeTransfer(msg.sender, accounts[i], amounts[i]*10**_decimals, false, false, true);
}
}
function _finalizeTransfer(address from, address to, uint256 amount, bool buy, bool sell, bool other) internal returns (bool) {
if (!_hasLiqBeenAdded) {
_checkLiquidityAdd(from, to);
if (!_hasLiqBeenAdded && _hasLimits(from, to) && !other) {
revert("Pre-liquidity transfer protection.");
}
}
bool takeFee = true;
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]){
takeFee = false;
}
_tOwned[from] -= amount;
uint256 amountReceived = (takeFee) ? takeTaxes(from, buy, sell, amount) : amount;
_tOwned[to] += amountReceived;
emit Transfer(from, to, amountReceived);
return true;
}
function takeTaxes(address from, bool buy, bool sell, uint256 amount) internal returns (uint256) {
uint256 currentFee;
if(block.timestamp <= tradingEnabledAt.add(60)) {
currentFee = 9900;
}
else if (buy)
{
currentFee = _taxRates.buyFee;
}
else if (sell)
{
currentFee = _taxRates.sellFee;
}
else
{
currentFee = _taxRates.transferFee;
}
uint256 feeAmount = amount * currentFee / masterTaxDivisor;
uint256 swapAmt = feeAmount;
_tOwned[address(this)] += swapAmt;
emit Transfer(from, address(this), swapAmt);
return amount - feeAmount;
}
}
pragma solidity 0.8.20;
// SPDX-License-Identifier: MIT
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) {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/OpenZeppelin-contracts/pull/522
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;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
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;
}
}