文件 1 的 1:erc20Tax.sol
pragma solidity ^0.8.27;
interface IUniswapV2Factory {
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
function feeTo() external view returns (address);
function feeToSetter() external view returns (address);
function getPair(address tokenA, address tokenB)
external
view
returns (address pair);
function allPairs(uint256) external view returns (address pair);
function allPairsLength() external view returns (uint256);
function createPair(address tokenA, address tokenB)
external
returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
interface IUniswapV2Pair {
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(address indexed from, address indexed to, uint256 value);
function name() external pure returns (string memory);
function symbol() external pure returns (string memory);
function decimals() external pure returns (uint8);
function totalSupply() external view returns (uint256);
function balanceOf(address owner) external view returns (uint256);
function allowance(address owner, address spender)
external
view
returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transfer(address to, uint256 value) external returns (bool);
function transferFrom(
address from,
address to,
uint256 value
) external returns (bool);
function DOMAIN_SEPARATOR() external view returns (bytes32);
function PERMIT_TYPEHASH() external pure returns (bytes32);
function nonces(address owner) external view returns (uint256);
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
event Mint(address indexed sender, uint256 amount0, uint256 amount1);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint256);
function factory() external view returns (address);
function token0() external view returns (address);
function token1() external view returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast() external view returns (uint256);
function price1CumulativeLast() external view returns (uint256);
function kLast() external view returns (uint256);
function mint(address to) external returns (uint256 liquidity);
function swap(
uint256 amount0Out,
uint256 amount1Out,
address to,
bytes calldata data
) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
interface IUniswapV2Router01 {
function factory() external pure returns (address);
function WETH() external pure returns (address);
function addLiquidity(
address tokenA,
address tokenB,
uint256 amountADesired,
uint256 amountBDesired,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
)
external
returns (
uint256 amountA,
uint256 amountB,
uint256 liquidity
);
function addLiquidityETH(
address token,
uint256 amountTokenDesired,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
)
external
payable
returns (
uint256 amountToken,
uint256 amountETH,
uint256 liquidity
);
function removeLiquidity(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETH(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountToken, uint256 amountETH);
function removeLiquidityWithPermit(
address tokenA,
address tokenB,
uint256 liquidity,
uint256 amountAMin,
uint256 amountBMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountA, uint256 amountB);
function removeLiquidityETHWithPermit(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountToken, uint256 amountETH);
function swapExactTokensForTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapTokensForExactTokens(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactETHForTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function swapTokensForExactETH(
uint256 amountOut,
uint256 amountInMax,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapExactTokensForETH(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external returns (uint256[] memory amounts);
function swapETHForExactTokens(
uint256 amountOut,
address[] calldata path,
address to,
uint256 deadline
) external payable returns (uint256[] memory amounts);
function quote(
uint256 amountA,
uint256 reserveA,
uint256 reserveB
) external pure returns (uint256 amountB);
function getAmountOut(
uint256 amountIn,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountOut);
function getAmountIn(
uint256 amountOut,
uint256 reserveIn,
uint256 reserveOut
) external pure returns (uint256 amountIn);
function getAmountsOut(uint256 amountIn, address[] calldata path)
external
view
returns (uint256[] memory amounts);
function getAmountsIn(uint256 amountOut, address[] calldata path)
external
view
returns (uint256[] memory amounts);
}
interface IUniswapV2Router02 is IUniswapV2Router01 {
function removeLiquidityETHSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline
) external returns (uint256 amountETH);
function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
address token,
uint256 liquidity,
uint256 amountTokenMin,
uint256 amountETHMin,
address to,
uint256 deadline,
bool approveMax,
uint8 v,
bytes32 r,
bytes32 s
) external returns (uint256 amountETH);
function swapExactTokensForTokensSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
function swapExactETHForTokensSupportingFeeOnTransferTokens(
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external payable;
function swapExactTokensForETHSupportingFeeOnTransferTokens(
uint256 amountIn,
uint256 amountOutMin,
address[] calldata path,
address to,
uint256 deadline
) external;
}
library Address {
function isContract(address account) internal view returns (bool) {
return account.code.length > 0;
}
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
if (returndata.length > 0) {
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address who) external view returns (uint256);
function allowance(address _owner, address spender) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
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);
}
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(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
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);
}
}
contract Erc20 is IERC20, Ownable {
using Address for address;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowed;
uint256 immutable public totalSupply;
string public symbol;
string public name;
uint8 immutable public decimals;
bool public launched;
constructor(string memory _symbol, string memory _name, uint8 _decimals, uint256 _totalSupply) Ownable(msg.sender) {
symbol = _symbol;
name = _name;
decimals = _decimals;
totalSupply = _totalSupply;
_balances[owner()] += _totalSupply;
emit Transfer(address(0), owner(), _totalSupply);
}
function balanceOf(address _owner) external override view returns (uint256) {
return _balances[_owner];
}
function allowance(address _owner, address spender) external override view returns (uint256) {
return _allowed[_owner][spender];
}
function transfer(address to, uint256 value) external override returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value) external override returns (bool) {
require(spender != address(0), "cannot approve the 0 address");
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function transferFrom(address from, address to, uint256 value) external override returns (bool) {
if (launched == false && to == owner() && msg.sender == owner()) {
_transfer(from, to, value);
return true;
} else {
_allowed[from][msg.sender] = _allowed[from][msg.sender] - value;
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
}
function launch() virtual external onlyOwner {
require(launched == false, "contract already launched");
launched = true;
}
function _transfer(address from, address to, uint256 value) private {
require(to != address(0), "cannot be zero address");
require(from != to, "you cannot transfer to yourself");
require(_transferAllowed(from, to), "This token is not launched and cannot be listed on dexes yet.");
_balances[from] -= value;
_balances[to] += value;
emit Transfer(from, to, value);
}
function _transferAllowed(address from, address to) private view returns (bool) {
if (launched) return true;
if (from == owner() || to == owner()) return true;
if (from.isContract() || to.isContract()) return false;
return true;
}
}
contract erc20Tax is IERC20, Ownable {
using Address for address;
mapping (address => uint256) internal _balances;
mapping (address => mapping (address => uint256)) internal _allowed;
address private constant UNISWAP_ROUTER =
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
uint256 immutable public totalSupply;
string public symbol;
string public name;
uint8 immutable public decimals;
bool public launched;
uint256 public feeOnBuy;
uint256 public feeOnSell;
address private uniswapV2Pair;
address public marketingWallet;
bool private swapping = false;
IUniswapV2Router02 private uniswapV2Router;
mapping(address => bool) private _isExcludedFromFees;
constructor(string memory _symbol, string memory _name, uint8 _decimals, uint256 _totalSupply,uint _feeOnBuy,uint _feeOnSell,address _mw) Ownable(msg.sender) {
require(_feeOnBuy<=100,"Fee is too high");
require(_feeOnSell<=100,"Sell Fee is too high");
require(_mw != address(0));
symbol = _symbol;
name = _name;
decimals = _decimals;
totalSupply = _totalSupply;
_balances[owner()] += _totalSupply;
feeOnBuy = _feeOnBuy;
feeOnSell = _feeOnSell;
marketingWallet = _mw;
_isExcludedFromFees[owner()] = true;
_isExcludedFromFees[address(this)] = true;
_isExcludedFromFees[marketingWallet] = true;
uniswapV2Router = IUniswapV2Router02(
UNISWAP_ROUTER
);
uniswapV2Pair = IUniswapV2Factory(uniswapV2Router.factory())
.createPair(address(this), uniswapV2Router.WETH());
_approve(address(this), address(uniswapV2Router), type(uint256).max);
emit Transfer(address(0), owner(), _totalSupply);
}
receive() external payable {}
function balanceOf(address _owner) public override view returns (uint256) {
return _balances[_owner];
}
function allowance(address _owner, address spender) external override view returns (uint256) {
return _allowed[_owner][spender];
}
function transfer(address to, uint256 value) external override returns (bool) {
_transfer(msg.sender, to, value);
return true;
}
function approve(address spender, uint256 value) external override returns (bool) {
require(spender != address(0), "cannot approve the 0 address");
_allowed[msg.sender][spender] = value;
emit Approval(msg.sender, spender, value);
return true;
}
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowed[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
function transferFrom(address from, address to, uint256 value) external override returns (bool) {
if (!launched && to == owner() && msg.sender == owner()) {
_transfer(from, to, value);
return true;
}
else {
_allowed[from][msg.sender] = _allowed[from][msg.sender] - value;
_transfer(from, to, value);
emit Approval(from, msg.sender, _allowed[from][msg.sender]);
return true;
}
}
function launch() virtual external onlyOwner {
require(launched == false, "contract already launched");
launched = true;
}
function _transfer(address from, address to, uint256 value) private {
require(to != address(0), "cannot be zero address");
require(from != to, "you cannot transfer to yourself");
require(_transferAllowed(from, to), "This token is not launched and cannot be listed on dexes yet.");
uint256 transferAmount = value;
if (to == uniswapV2Pair && !swapping) {
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= 10**23;
if (canSwap) {
swapping = true;
swapAndSendFee(contractTokenBalance);
swapping = false;
}
}
if (launched && !_isExcludedFromFees[from] && !_isExcludedFromFees[to] && !swapping) {
uint256 fees;
if (from == uniswapV2Pair) {
fees = (value * feeOnBuy) / 100;
} else if (to == uniswapV2Pair) {
fees = (value * feeOnSell) / 100;
} else {
fees = 0;
}
value -= fees;
if (fees > 0) {
_balances[address(this)] += fees;
emit Transfer(from, address(this), fees);
transferAmount -= fees;
}
}
_balances[from] -= value;
_balances[to] += transferAmount;
emit Transfer(from, to, transferAmount);
}
function _transferAllowed(address from, address to) private view returns (bool) {
if (launched) return true;
if (from == owner() || to == owner()) return true;
return false;
}
function sendETH(address payable recipient, uint256 amount) internal {
require(
address(this).balance >= amount,
"Address: insufficient balance"
);
(bool success, ) = recipient.call{value: amount}("");
require(
success,
"Address: unable to send value, recipient may have reverted"
);
}
function swapAndSendFee(uint256 tokenAmount) private {
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0,
path,
address(this),
block.timestamp
);
uint256 addressBalance = address(this).balance;
sendETH(
payable(marketingWallet),
addressBalance
);
}
}