Contract Source Code:
File 1 of 1 : BFC
/*
The ultimate cross-chain DeFi platform.
Website: https://www.bifichain.org
Telegram: https://t.me/bifi_erc
Twitter: https://twitter.com/bifi_erc
Dapp: https://app.bifichain.org
*/
// SPDX-License-Identifier: MIT
pragma solidity 0.8.21;
library SafeMathInteger {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
function mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
abstract contract Ownable {
address internal owner;
constructor(address _owner) {owner = _owner;}
modifier onlyOwner() {require(isOwner(msg.sender), "!OWNER"); _;}
function isOwner(address account) public view returns (bool) {return account == owner;}
function transferOwnership(address payable adr) public onlyOwner {owner = adr; emit OwnershipTransferred(adr);}
function renounceOwnership() public onlyOwner {owner = address(0); emit OwnershipTransferred(address(0));}
event OwnershipTransferred(address owner);
}
interface IUniswapRouter {
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 swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline) external;
}
interface IUniswapFactory {
function createPair(address tokenA, address tokenB) external returns (address pairAddress_);
function getPair(address tokenA, address tokenB) external view returns (address pairAddress_);
}
interface IERC20 {
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 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 BFC is IERC20, Ownable {
using SafeMathInteger for uint256;
string private constant _name = 'BiFi Chain';
string private constant _symbol = 'BFC';
uint8 private constant _decimals = 18;
uint256 private _totalSupply = 10 ** 9 * (10 ** _decimals);
IUniswapRouter _uniRouter;
address public _uniPair;
bool private _activatedTrade = false;
bool private _enabledSwap = true;
uint256 private _swapFeesAfter;
bool private _intaxswap;
uint256 _countSwaps = 1;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public _isExemptFromFees;
uint256 private _swapFeeMax = ( _totalSupply * 3) / 100;
uint256 private _swapFeeMin = ( _totalSupply * 1) / 100000;
modifier lockSwap {_intaxswap = true; _; _intaxswap = false;}
uint256 private liquidityFee = 0;
uint256 private marketingFee = 0;
uint256 private developmentFee = 100;
uint256 private burnFee = 0;
uint256 private totalFee = 2400;
uint256 private sellFee = 2400;
uint256 private transferFee = 2400;
uint256 private denominator = 10000;
address internal constant DEAD = 0x000000000000000000000000000000000000dEaD;
address internal development_receiver = 0xb251e35E94957fE07288A29eF70De28cF0edf0Da;
address internal marketing_receiver = 0xb251e35E94957fE07288A29eF70De28cF0edf0Da;
address internal liquidity_receiver = 0xb251e35E94957fE07288A29eF70De28cF0edf0Da;
uint256 public _maxTxAmount = ( _totalSupply * 130 ) / 10000;
uint256 public _maxTransferAmount = ( _totalSupply * 130 ) / 10000;
uint256 public _maxWalletAmount = ( _totalSupply * 130 ) / 10000;
constructor() Ownable(msg.sender) {
IUniswapRouter _router = IUniswapRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _pair = IUniswapFactory(_router.factory()).createPair(address(this), _router.WETH());
_uniRouter = _router; _uniPair = _pair;
_isExemptFromFees[liquidity_receiver] = true;
_isExemptFromFees[marketing_receiver] = true;
_isExemptFromFees[development_receiver] = true;
_isExemptFromFees[msg.sender] = true;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
receive() external payable {}
function name() public pure returns (string memory) {return _name;}
function symbol() public pure returns (string memory) {return _symbol;}
function decimals() public pure returns (uint8) {return _decimals;}
function getOwner() external view override returns (address) { return owner; }
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 totalSupply() public view override returns (uint256) {return _totalSupply.sub(balanceOf(DEAD)).sub(balanceOf(address(0)));}
function swapTaxBack(uint256 tokens) private lockSwap {
uint256 _denominator = (liquidityFee.add(1).add(marketingFee).add(developmentFee)).mul(2);
uint256 tokensToAddLiquidityWith = tokens.mul(liquidityFee).div(_denominator);
uint256 toSwap = tokens.sub(tokensToAddLiquidityWith);
uint256 initialBalance = address(this).balance;
swapTokensForEth(toSwap);
uint256 deltaBalance = address(this).balance.sub(initialBalance);
uint256 unitBalance= deltaBalance.div(_denominator.sub(liquidityFee));
uint256 ETHToAddLiquidityWith = unitBalance.mul(liquidityFee);
if(ETHToAddLiquidityWith > uint256(0)){addLiquidity(tokensToAddLiquidityWith, ETHToAddLiquidityWith); }
uint256 marketingAmt = unitBalance.mul(2).mul(marketingFee);
if(marketingAmt > 0){payable(marketing_receiver).transfer(marketingAmt);}
uint256 contractBalance = address(this).balance;
if(contractBalance > uint256(0)){payable(development_receiver).transfer(contractBalance);}
}
function shouldTaxAffect(address sender, address recipient) internal view returns (bool) {
return !_isExemptFromFees[sender] && !_isExemptFromFees[recipient];
}
function addLiquidity(uint256 tokenAmount, uint256 ETHAmount) private {
_approve(address(this), address(_uniRouter), tokenAmount);
_uniRouter.addLiquidityETH{value: ETHAmount}(
address(this),
tokenAmount,
0,
0,
liquidity_receiver,
block.timestamp);
}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a > b) ? b : a;
}
function canSwapBackFee(address sender, address recipient, uint256 amount) internal view returns (bool) {
bool aboveMin = amount >= _swapFeeMin;
bool aboveThreshold = balanceOf(address(this)) >= _swapFeeMin;
return !_intaxswap && _enabledSwap && _activatedTrade && aboveMin && !_isExemptFromFees[sender] && recipient == _uniPair && _swapFeesAfter >= _countSwaps && aboveThreshold;
}
function getTaxParams(address sender, address recipient) internal view returns (uint256) {
if(recipient == _uniPair){return sellFee;}
if(sender == _uniPair){return totalFee;}
return transferFee;
}
function getLastAmounts(address sender, address recipient, uint256 amount) internal returns (uint256) {
if(getTaxParams(sender, recipient) > 0){
uint256 feeAmount = amount.div(denominator).mul(getTaxParams(sender, recipient));
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
if(burnFee > uint256(0) && getTaxParams(sender, recipient) > burnFee){_transfer(address(this), address(DEAD), amount.div(denominator).mul(burnFee));}
return amount.sub(feeAmount);} return amount;
}
function setSize(uint256 _buy, uint256 _sell, uint256 _wallet) external onlyOwner {
uint256 newTx = _totalSupply.mul(_buy).div(10000); uint256 newTransfer = _totalSupply.mul(_sell).div(10000); uint256 newWallet = _totalSupply.mul(_wallet).div(10000);
_maxTxAmount = newTx; _maxTransferAmount = newTransfer; _maxWalletAmount = newWallet;
uint256 limit = totalSupply().mul(5).div(1000);
require(newTx >= limit && newTransfer >= limit && newWallet >= limit, "Max TXs and Max Wallet cannot be less than .5%");
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, msg.sender, _allowances[sender][msg.sender].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
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;
emit Approval(owner, spender, amount);
}
function _transfer(address sender, address recipient, uint256 amount) private {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
if(!_isExemptFromFees[sender] && !_isExemptFromFees[recipient]){require(_activatedTrade, "_activatedTrade");}
if(!_isExemptFromFees[sender] && !_isExemptFromFees[recipient] && recipient != address(_uniPair) && recipient != address(DEAD)){
require((_balances[recipient].add(amount)) <= _maxWalletAmount, "Exceeds maximum wallet amount.");}
if(sender != _uniPair){require(amount <= _maxTransferAmount || _isExemptFromFees[sender] || _isExemptFromFees[recipient], "TX Limit Exceeded");}
require(amount <= _maxTxAmount || _isExemptFromFees[sender] || _isExemptFromFees[recipient], "TX Limit Exceeded");
if(recipient == _uniPair && !_isExemptFromFees[sender]){_swapFeesAfter += uint256(1);}
if(canSwapBackFee(sender, recipient, amount)){swapTaxBack(min(balanceOf(address(this)), _swapFeeMax)); _swapFeesAfter = uint256(0);}
if (!_activatedTrade || !_isExemptFromFees[sender]) { _balances[sender] = _balances[sender].sub(amount); }
uint256 amountReceived = shouldTaxAffect(sender, recipient) ? getLastAmounts(sender, recipient, amount) : amount;
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
}
function setTxConfig(uint256 _liquidity, uint256 _marketing, uint256 _burn, uint256 _development, uint256 _total, uint256 _sell, uint256 _trans) external onlyOwner {
liquidityFee = _liquidity; marketingFee = _marketing; burnFee = _burn; developmentFee = _development; totalFee = _total; sellFee = _sell; transferFee = _trans;
require(totalFee <= denominator && sellFee <= denominator && transferFee <= denominator, "totalFee and sellFee cannot be more than 100%");
}
function setTradeActive() external onlyOwner {_activatedTrade = true;}
function swapTokensForEth(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = _uniRouter.WETH();
_approve(address(this), address(_uniRouter), tokenAmount);
_uniRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp);
}
}