文件 1 的 1：BVD.sol
pragma solidity ^0.8.18;
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(msg.sender);
}
function _msgData() internal view virtual returns (bytes memory) {
this;
return msg.data;
}
}
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) {
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;
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;
}
}
contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
function owner() public view returns (address) {
return _owner;
}
modifier onlyOwner() {
require(_owner == _msgSender(), "Ownable: caller is not the 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), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
interface IUniswapV2Router02 {
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;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
)
external payable;
}
interface IUniswapV2Pair {
function sync() external;
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
}
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 BVD is Context, IERC20, Ownable {
using SafeMath for uint256;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
mapping (address => uint256) private balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isExcludedFromFee;
string private constant _name = "Bovada - Online Sportsbook, Casino & Poker";
string private constant _symbol = "BVD";
uint8 private constant _decimals = 9;
uint256 private _tTotal = 1000000000000 * 10**_decimals;
bool public tradingActive = false;
uint256 private liquidityFee;
uint256 private marketingFee;
BuyFees public buyFee;
SellFees public sellFee;
bool private swapping;
uint256 public _maxWalletAmount = 10000000000 * 10**_decimals;
uint256 public _maxTxAmount = 10000000000 * 10**_decimals;
uint256 public swapTokenAtAmount = 10000000000 * 10**_decimals;
uint256 public forceSwapCount;
address public liquidityReceiver;
address public marketingWallet;
struct BuyFees{uint256 liquidity;uint256 marketing;}
struct SellFees{uint256 liquidity;uint256 marketing;}
event SwapAndLiquify(uint256 tokensSwapped, uint256 ethReceived, uint256 tokensIntoLiquidity);
constructor (address marketingAddress, address liquidityAddress) {
marketingWallet = marketingAddress;
liquidityReceiver = liquidityAddress;
balances[_msgSender()] = _tTotal;
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory()).createPair(address(this), _uniswapV2Router.WETH());
buyFee.liquidity = 5;
buyFee.marketing = 5;
sellFee.liquidity = 5;
sellFee.marketing = 30;
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;
_isExcludedFromFee[msg.sender] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[address(0x00)] = true;
_isExcludedFromFee[address(0xdead)] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
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 totalSupply() public view override returns (uint256) {return _tTotal;}
function balanceOf(address account) public view override returns (uint256) {return balances[account];}
function transfer(address recipient, uint256 amount) public override returns (bool) {
_transfer(_msgSender(), 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(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()] - amount);
return true;
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
_isExcludedFromFee[address(account)] = excluded;
}
receive() external payable {}
function takeBuyFees(uint256 amount, address from) private returns (uint256) {
uint256 liquidityFeeToken = amount * buyFee.liquidity / 100;
uint256 marketingFeeTokens = amount * buyFee.marketing / 100;
balances[address(this)] += liquidityFeeToken + marketingFeeTokens;
emit Transfer (from, address(this), marketingFeeTokens + liquidityFeeToken);
return (amount -liquidityFeeToken -marketingFeeTokens);
}
function takeSellFees(uint256 amount, address from) private returns (uint256) {
uint256 liquidityFeeToken = amount * sellFee.liquidity / 100;
uint256 marketingFeeTokens = amount * sellFee.marketing / 100;
balances[address(this)] += liquidityFeeToken + marketingFeeTokens;
emit Transfer (from, address(this), marketingFeeTokens + liquidityFeeToken );
return (amount -liquidityFeeToken -marketingFeeTokens);
}
function startTrade() external onlyOwner {
tradingActive = true;
}
function adjustFees(uint256 _buyMarketingFee, uint256 _buyLiquidityFee, uint256 _sellMarketingFee, uint256 _sellLiquidityFee) public onlyOwner {
buyFee.liquidity = _buyLiquidityFee;
buyFee.marketing = _buyMarketingFee;
sellFee.liquidity = _sellLiquidityFee;
sellFee.marketing = _sellMarketingFee;
}
function updateMaxTransactions(uint256 _maxTx, uint256 _maxWallet) public onlyOwner {
require(_maxTx + _maxWallet > _tTotal / 10000, "Should be bigger than 0,1%");
_maxTxAmount = _maxTx;
_maxWalletAmount = _maxWallet;
}
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 from,
address to,
uint256 amount
) private {
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");
balances[from] -= amount;
uint256 transferAmount = amount;
bool takeFee;
if(!_isExcludedFromFee[from] && !_isExcludedFromFee[to]){
takeFee = true;
}
if (!tradingActive) {
require(
_isExcludedFromFee[from] || _isExcludedFromFee[to],
"Trading is not active."
);
}
if(takeFee){
if(to != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxnsAmount");
require(balanceOf(to) + amount <= _maxWalletAmount, "Transfer amount exceeds the maxWalletAmount.");
transferAmount = takeBuyFees(amount, to);
}
if(from != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxnsAmount");
transferAmount = takeSellFees(amount, from);
forceSwapCount += 1;
if (balanceOf(address(this)) >= swapTokenAtAmount && !swapping) {
swapping = true;
swapBack(swapTokenAtAmount);
swapping = false;
forceSwapCount = 0;
}
if (forceSwapCount > 5 && !swapping) {
swapping = true;
swapBack(balanceOf(address(this)));
swapping = false;
forceSwapCount = 0;
}
}
if(to != uniswapV2Pair && from != uniswapV2Pair){
require(amount <= _maxTxAmount, "Transfer Amount exceeds the maxTxnsAmount");
require(balanceOf(to) + amount <= _maxWalletAmount, "Transfer amount exceeds the maxWalletAmount.");
}
}
balances[to] += transferAmount;
emit Transfer(from, to, transferAmount);
}
function swapBack(uint256 amount) private {
uint256 contractBalance = amount;
uint256 liquidityTokens = contractBalance * (buyFee.liquidity + sellFee.liquidity) / (buyFee.marketing + buyFee.liquidity + sellFee.marketing + sellFee.liquidity);
uint256 marketingTokens = contractBalance * (buyFee.marketing + sellFee.marketing) / (buyFee.marketing + buyFee.liquidity + sellFee.marketing + sellFee.liquidity);
uint256 totalTokensToSwap = liquidityTokens + marketingTokens;
uint256 tokensForLiquidity = liquidityTokens.div(2);
uint256 amountToSwapForETH = contractBalance.sub(tokensForLiquidity);
uint256 initialETHBalance = address(this).balance;
swapTokensForEth(amountToSwapForETH);
uint256 ethBalance = address(this).balance.sub(initialETHBalance);
uint256 ethForLiquidity = ethBalance.mul(liquidityTokens).div(totalTokensToSwap);
addLiquidity(tokensForLiquidity, ethForLiquidity);
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 addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
_approve(address(this), address(uniswapV2Router), tokenAmount);
uniswapV2Router.addLiquidityETH {value: ethAmount} (
address(this),
tokenAmount,
0,
0,
liquidityReceiver,
block.timestamp
);
}
}
