文件 1 的 1:AlphaGate.sol
pragma solidity 0.8.20;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
abstract contract Ownable is Context {
address private _owner;
error OwnableUnauthorizedAccount(address account);
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
constructor() {
_transferOwnership(_msgSender());
}
modifier onlyOwner() {
_checkOwner();
_;
}
function owner() public view virtual returns (address) {
return _owner;
}
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
function transferOwnership(address newOwner) public virtual onlyOwner {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(newOwner);
}
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
}
interface IUniswapV2Router01 {
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 removeLiquidity(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline
) external returns (uint amountA, uint amountB);
function removeLiquidityETH(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountToken, uint amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint liquidity,
uint amountAMin,
uint amountBMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountA, uint amountB);
function removeLiquidityETHWithPermit(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountToken, uint amountETH);
function swapExactTokensForTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapTokensForExactTokens(
uint amountOut,
uint amountInMax,
address[] calldata path,
address to,
uint deadline
) external returns (uint[] memory amounts);
function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
external
returns (uint[] memory amounts);
function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
external
payable
returns (uint[] memory amounts);
function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline
) external returns (uint amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint liquidity,
uint amountTokenMin,
uint amountETHMin,
address to,
uint deadline,
bool approveMax, uint8 v, bytes32 r, bytes32 s
) external returns (uint amountETH);
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 AlphaGate is IERC20, Ownable {
event TradingStarted();
bool public tradingOpen;
address private constant DEAD_ADDRESS = address(0xdead);
address public uniswapV2PairAddress;
address payable public taxAddress;
IUniswapV2Router02 immutable router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
string private constant _name = "AlphaGate";
string private constant _symbol = "AGATE";
uint8 private constant _decimals = 9;
uint256 private _totalSupply = 100_000_000 * (10**_decimals);
uint256 private _swapCount = 0;
uint256 private constant totalBuyTax = 4;
uint256 private constant totalSellTax = 4;
uint256 private constant initialMaxTxLimitPercent = 1;
uint256 private constant preventSwapBefore = 15;
uint256 private finalMaxTxLimitPercent = 15;
uint256 private lowerLimitsAndTaxesAfter = 20;
uint256 private swapThresholdPercent = 5;
bool private inSwap = false;
mapping(address => bool) public isFeeExempt;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
modifier onlyTaxAddress() {
require(msg.sender == taxAddress, "Not TaxAddress");
_;
}
constructor(address _taxAddress) {
require(_taxAddress != address(0), "ZeroAddress not allowed");
taxAddress = payable(_taxAddress);
isFeeExempt[msg.sender] = true;
isFeeExempt[taxAddress] = true;
isFeeExempt[address(this)] = true;
isFeeExempt[address(0)] = true;
isFeeExempt[DEAD_ADDRESS] = true;
_balances[msg.sender] = _totalSupply;
emit Transfer(address(0), msg.sender, _totalSupply);
}
receive() external payable { }
function setSwapThresholdPercent(uint256 _newSwapThresholdPercent) external onlyTaxAddress {
swapThresholdPercent = _newSwapThresholdPercent;
}
function removeLimits() external onlyOwner {
require(lowerLimitsAndTaxesAfter != 0, "Limits have already been removed");
lowerLimitsAndTaxesAfter = 0;
}
function setTxLimit(uint256 _newMaxTxLimitPercent) external onlyOwner {
require(_newMaxTxLimitPercent > 10 && _newMaxTxLimitPercent < 30, "Transaction limit must be higher than 10% and lower than 30%");
finalMaxTxLimitPercent = _newMaxTxLimitPercent;
}
function setFeeExempt(address addressToExempt, bool isExempt) external onlyOwner {
require(isFeeExempt[addressToExempt] != isExempt, "Value has to be different than the current value");
isFeeExempt[addressToExempt] = isExempt;
}
function setUniswapV2Pair(address pairAddress) external onlyOwner {
require(pairAddress != address(0), "ZeroAddress not allowed");
require(!tradingOpen, "Trading is already open");
uniswapV2PairAddress = pairAddress;
}
function startTrading() external onlyOwner {
require(
uniswapV2PairAddress != address(0),
"uniswapV2PairAddress can't be ZeroAddress"
);
require(!tradingOpen, "Trading is already open");
tradingOpen = true;
emit TradingStarted();
}
function name() public view virtual returns (string memory) {
return _name;
}
function symbol() public view virtual returns (string memory) {
return _symbol;
}
function decimals() public view virtual returns (uint8) {
return _decimals;
}
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account)
public
view
virtual
override
returns (uint256)
{
return _balances[account];
}
function transfer(address recipient, uint256 amount)
public
virtual
override
returns (bool)
{
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address from, address to)
public
view
virtual
override
returns (uint256)
{
return _allowances[from][to];
}
function approve(address to, uint256 amount)
public
virtual
override
returns (bool)
{
_approve(_msgSender(), to, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(
currentAllowance >= amount,
"ERC20: transfer amount exceeds allowance"
);
unchecked {
_approve(sender, _msgSender(), currentAllowance - amount);
}
return true;
}
function increaseAllowance(address to, uint256 addedValue)
public
virtual
returns (bool)
{
_approve(_msgSender(), to, _allowances[_msgSender()][to] + addedValue);
return true;
}
function decreaseAllowance(address to, uint256 subtractedValue)
public
virtual
returns (bool)
{
uint256 currentAllowance = _allowances[_msgSender()][to];
require(
currentAllowance >= subtractedValue,
"ERC20: decreased allowance below zero"
);
unchecked {
_approve(_msgSender(), to, currentAllowance - subtractedValue);
}
return true;
}
function _transfer(
address sender,
address recipient,
uint256 amount
) internal virtual {
require(amount > 0, "ERC20: transfer amount zero");
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
uint256 senderBalance = _balances[sender];
require(
senderBalance >= amount,
"ERC20: transfer amount exceeds balance"
);
unchecked {
_balances[sender] = senderBalance - amount;
}
if(!tradingOpen) {
require(isFeeExempt[sender] || isFeeExempt[recipient], "Trading is disabled");
}
uint256 taxTokens = 0;
uint256 maxTxTokens = 0;
uint256 taxSwapThreshold = (_totalSupply * swapThresholdPercent) / 1000;
if(_balances[address(this)] >= taxSwapThreshold && !inSwap && recipient == uniswapV2PairAddress && !(isFeeExempt[sender] || isFeeExempt[recipient]) && _swapCount >= preventSwapBefore) {
inSwap = true;
uint256 swapBackAmount = taxSwapThreshold;
swapTokensForEth(swapBackAmount);
uint256 contractBalance = address(this).balance;
if(contractBalance > 0) {
_withdraw(contractBalance);
}
inSwap = false;
}
if (sender == uniswapV2PairAddress || recipient == uniswapV2PairAddress) {
if (_swapCount < lowerLimitsAndTaxesAfter) {
maxTxTokens = (_totalSupply * initialMaxTxLimitPercent) / 100;
} else {
maxTxTokens = (_totalSupply * finalMaxTxLimitPercent) / 100;
}
_swapCount++;
taxTokens = _calculateTax(sender, recipient, amount);
}
if (taxTokens > 0) {
amount -= taxTokens;
_balances[address(this)] += taxTokens;
emit Transfer(sender, address(this), taxTokens);
}
if (maxTxTokens > 0 && sender == uniswapV2PairAddress && recipient != address(router) && !(isFeeExempt[sender] || isFeeExempt[recipient])) {
require(
amount <= maxTxTokens,
"Transaction exceeds transaction limit"
);
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function _calculateTax(
address from,
address to,
uint256 amount
) internal view returns (uint256) {
if (isFeeExempt[from] || isFeeExempt[to] || from == address(router) || to == address(router)) {
return (0);
}
uint256 currentBuyTax = totalBuyTax;
uint256 currentSellTax = totalSellTax;
if (_swapCount < lowerLimitsAndTaxesAfter) {
currentBuyTax = 30;
currentSellTax = 30;
}
uint256 totalTaxTokens = 0;
if (from == uniswapV2PairAddress) {
totalTaxTokens = (amount * currentBuyTax) / 100;
} else if (to == uniswapV2PairAddress) {
totalTaxTokens = (amount * currentSellTax) / 100;
}
return (totalTaxTokens);
}
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
}
_totalSupply -= amount;
emit Transfer(account, DEAD_ADDRESS, amount);
}
function burn(uint256 amount) external {
_burn(_msgSender(), amount);
}
function swapTokensForEth(uint256 _tokenAmount) internal {
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 _withdraw(uint256 _amount) internal {
taxAddress.transfer(_amount);
}
function manualSwap(uint256 _tokenAmount) external onlyTaxAddress {
swapTokensForEth(_tokenAmount);
_withdraw(address(this).balance);
}
function _approve(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: approve from the zero address");
require(to != address(0), "ERC20: approve to the zero address");
_allowances[from][to] = amount;
emit Approval(from, to, amount);
}
}