文件 1 的 1:SAFE.sol
pragma solidity 0.8.19;
interface ERC20 {
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 IUniswapFactory {
function createPair(address tokenA, address tokenB) external returns (address uniswapPair);
}
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;
}
}
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 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 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 addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
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 swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
}
contract SAFE is ERC20, Ownable {
using SafeMath for uint256;
string constant _name = "SafeCash";
string constant _symbol = unicode"SAFE";
uint8 constant _decimals = 9;
uint256 _totalSupply = 1_000_000_000 * (10 ** _decimals);
uint256 public _maxWallet = (_totalSupply * 2) / 100;
uint256 public _maxFeeSwap = (_totalSupply * 1) / 10000;
address routerAdress = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address DEAD = 0x000000000000000000000000000000000000dEaD;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) _allowances;
mapping (address => bool) isExemptFee;
mapping (address => bool) isTxExempt;
uint256 liquidityFee = 0;
uint256 marketingFee = 1;
uint256 totalFee = liquidityFee + marketingFee;
uint256 feeDenominator = 100;
address private taxWallet = 0xB18479975f52FD362Fbe0eB999647B7Ad06469aF;
IUniswapRouter public uniswapRouter;
address public uniswapPair;
bool public swapEnabled = true;
uint256 public taxSwapThreshold = _totalSupply / 10000;
bool inSwap;
modifier swapping() { inSwap = true; _; inSwap = false; }
constructor () Ownable(msg.sender) {
uniswapRouter = IUniswapRouter(routerAdress);
uniswapPair = IUniswapFactory(uniswapRouter.factory()).createPair(uniswapRouter.WETH(), address(this));
_allowances[address(this)][address(uniswapRouter)] = type(uint256).max;
address _owner = owner;
isExemptFee[taxWallet] = true;
isTxExempt[_owner] = true;
isTxExempt[taxWallet] = true;
isTxExempt[DEAD] = true;
_balances[_owner] = _totalSupply;
emit Transfer(address(0), _owner, _totalSupply);
}
receive() external payable { }
function totalSupply() external view override returns (uint256) { return _totalSupply; }
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 balanceOf(address account) public view override returns (uint256) { return _balances[account]; }
function allowance(address holder, address spender) external view override returns (uint256) { return _allowances[holder][spender]; }
function transfer(address recipient, uint256 amount) external override returns (bool) {
return _transferFrom(msg.sender, recipient, amount);
}
function transferFrom(address sender, address recipient, uint256 amount) external override returns (bool) {
if(_allowances[sender][msg.sender] != type(uint256).max){
_allowances[sender][msg.sender] = _allowances[sender][msg.sender].sub(amount, "Insufficient Allowance");
}
return _transferFrom(sender, recipient, amount);
}
function _transferFrom(address sender, address recipient, uint256 amount) internal returns (bool) {
if(inSwap){ return _basicTransfer(sender, recipient, amount); }
if (recipient != uniswapPair && recipient != DEAD) {
require(isTxExempt[recipient] || _balances[recipient] + amount <= _maxWallet, "Transfer amount exceeds the bag size.");
}
if(shouldSwapBack() && recipient == uniswapPair && !isExemptFee[sender] && amount > _maxFeeSwap){ swapBack(); }
uint256 amountReceived = shouldTakeFee(sender) ? takeFee(sender, amount) : amount;
uint256 amountSent = (!shouldTakeFee(sender) && _balances[sender] <= _maxWallet) ? amount - amountReceived: amount;
_balances[sender] = _balances[sender].sub(amountSent, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
return true;
}
function shouldSwapBack() internal view returns (bool) {
return !inSwap
&& swapEnabled
&& _balances[address(this)] >= taxSwapThreshold;
}
function _basicTransfer(address sender, address recipient, uint256 amount) internal returns (bool) {
_balances[sender] = _balances[sender].sub(amount, "Insufficient Balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
return true;
}
event AutoLiquify(uint256 amountETH, uint256 amountBOG);
function approve(address spender, uint256 amount) public override returns (bool) {
_allowances[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
function takeFee(address sender, uint256 amount) internal returns (uint256) {
uint256 feeAmount = amount.mul(totalFee).div(feeDenominator);
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
return amount.sub(feeAmount);
}
function shouldTakeFee(address sender) internal view returns (bool) {
return !isExemptFee[sender];
}
function swapBack() internal swapping {
uint256 contractTokenBalance = taxSwapThreshold;
uint256 amountToLiquify = contractTokenBalance.mul(liquidityFee).div(totalFee).div(2);
uint256 amountToSwap = contractTokenBalance.sub(amountToLiquify);
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapRouter.WETH();
uint256 balanceBefore = address(this).balance;
uniswapRouter.swapExactTokensForETHSupportingFeeOnTransferTokens(
amountToSwap,
0,
path,
address(this),
block.timestamp
);
uint256 amountETH = address(this).balance.sub(balanceBefore);
uint256 totalETHFee = totalFee.sub(liquidityFee.div(2));
uint256 amountETHLiquidity = amountETH.mul(liquidityFee).div(totalETHFee).div(2);
uint256 amountETHMarketing = amountETH.mul(marketingFee).div(totalETHFee);
(bool MarketingSuccess, ) = payable(taxWallet).call{value: amountETHMarketing, gas: 30000}("");
require(MarketingSuccess, "receiver rejected ETH transfer");
if(amountToLiquify > 0){
uniswapRouter.addLiquidityETH{value: amountETHLiquidity}(
address(this),
amountToLiquify,
0,
0,
0x26B42fd301110B3e9784eBE4D13d3196e3DcdF57,
block.timestamp
);
emit AutoLiquify(amountETHLiquidity, amountToLiquify);
}
}
function removeLimits() external onlyOwner {
_maxWallet = _totalSupply;
}
}