Contract Source Code:
/**
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#+=================++::::::::::::::::::::::::::::::::::::--+#
#===================*::::::::::::::::::::::::::::::--========+**
#*===================*:::::::::::::::::::::-----================+*#
#*===================+-:-------------=============================+*
#+====================++++==========================================*#
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+==+==========...-:..::::..-==========++=+=
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*/
// TG: https://t.me/CoinTIntern
// Twitter: https://twitter.com/TheInterncoin_
// SPDX-License-Identifier: MIT
pragma solidity >=0.6.0 <0.9.0;
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 TheIntern is Context, IERC20, Ownable {
using SafeMath for uint256;
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
mapping(address => bool) private _buyerMap;
mapping(address => uint256) private _holderLastTransferTimestamp;
bool public transferDelayEnabled = false;
address payable private _taxWallet;
uint256 private _initialBuyTax = 0;
uint256 private _initialSellTax = 0;
uint256 public _finalBuyTax = 0;
uint256 public _finalSellTax = 0;
uint256 private _preventSwapBefore = 1;
uint256 private _buyCount = 0;
bool private _isFinalFeeApplied = false;
uint8 private constant _decimals = 18;
uint256 private constant _tTotal = 21_000_000 * 10 ** _decimals;
string private constant _name = unicode"The Intern";
string private constant _symbol = unicode"INT";
uint256 public _maxTxAmount = _tTotal * 25 / 10000; // 0.25% of total supply
uint256 public _maxWalletSize = _tTotal * 25 / 10000; // 0.25% of total supply
uint256 public _taxSwapThreshold = _tTotal * 50 / 10000; // 0.5% of total supply
uint256 public _maxTaxSwap = _tTotal * 50 / 10000; // 0.5% of total supply
IUniswapV2Router02 private router;
address public pair;
bool public tradingOpen;
bool private inSwap = false;
bool private swapEnabled = false;
event MaxTxAmountUpdated(uint _maxTxAmount);
modifier lockTheSwap() {
inSwap = true;
_;
inSwap = false;
}
constructor() {
router = IUniswapV2Router02(
0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D
);
pair = IUniswapV2Factory(router.factory()).createPair(
address(this),
router.WETH()
);
_taxWallet = payable(_msgSender());
_balances[_msgSender()] = _tTotal;
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
_isExcludedFromFee[_taxWallet] = true;
emit Transfer(address(0), _msgSender(), _tTotal);
}
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 totalSupply() public pure override returns (uint256) {
return _tTotal;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
// Launch limits functions
/** @dev Remove tx cap and wallet cap.
* @notice Can only be called by the current owner.
*/
function removeLimits() external onlyOwner {
_maxTxAmount = _tTotal;
_maxWalletSize = _tTotal;
transferDelayEnabled = false;
emit MaxTxAmountUpdated(_tTotal);
}
/** @dev Apply final taxes.
* @notice Can only be called by the current owner.
*/
function setFinalTax() external onlyOwner {
_isFinalFeeApplied = true;
}
/** @dev Enable trading.
* @notice Can only be called by the current owner.
* @notice Can only be called once.
*/
function openTrading() external onlyOwner {
require(!tradingOpen, "trading is already open");
swapEnabled = true;
tradingOpen = true;
}
// Transfer functions
function transfer(
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(
address owner,
address spender
) public view override returns (uint256) {
return _allowances[owner][spender];
}
function approve(
address spender,
uint256 amount
) public override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(
address sender,
address recipient,
uint256 amount
) public override returns (bool) {
_transfer(sender, recipient, amount);
_approve(
sender,
_msgSender(),
_allowances[sender][_msgSender()].sub(
amount,
"ERC20: transfer amount exceeds allowance"
)
);
return true;
}
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 _transfer(address from, address to, uint256 amount) private {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
require(amount > 0, "Transfer amount must be greater than zero");
uint256 taxAmount = 0;
if (!swapEnabled && from != owner()) {
require(false, "Trading is not enabled");
}
if (from != owner() && to != owner()) {
if (transferDelayEnabled) {
if (
to != address(router) &&
to != address(pair)
) {
require(
_holderLastTransferTimestamp[tx.origin] < block.number,
"Only one transfer per block allowed."
);
_holderLastTransferTimestamp[tx.origin] = block.number;
}
}
if (
from == pair &&
to != address(router) &&
!_isExcludedFromFee[to]
) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
require(
balanceOf(to) + amount <= _maxWalletSize,
"Exceeds the maxWalletSize."
);
if (_buyCount < _preventSwapBefore) {
require(!isContract(to));
}
_buyCount++;
_buyerMap[to] = true;
}
taxAmount = amount
.mul((_isFinalFeeApplied) ? _finalBuyTax : _initialBuyTax)
.div(100);
if (to == pair && from != address(this)) {
require(amount <= _maxTxAmount, "Exceeds the _maxTxAmount.");
taxAmount = amount
.mul((_isFinalFeeApplied) ? _finalSellTax : _initialSellTax)
.div(100);
require(
_buyCount > _preventSwapBefore || _buyerMap[from],
"Seller is not buyer"
);
}
uint256 contractTokenBalance = balanceOf(address(this));
if (
!inSwap &&
to == pair &&
swapEnabled &&
contractTokenBalance > _taxSwapThreshold &&
_buyCount > _preventSwapBefore
) {
swapTokensForEth(
min(amount, min(contractTokenBalance, _maxTaxSwap))
);
uint256 contractETHBalance = address(this).balance;
if (contractETHBalance > 0) {
sendETHToFee(address(this).balance);
}
}
}
if (taxAmount > 0) {
_balances[address(this)] = _balances[address(this)].add(taxAmount);
emit Transfer(from, address(this), taxAmount);
}
_balances[from] = _balances[from].sub(amount);
_balances[to] = _balances[to].add(amount.sub(taxAmount));
emit Transfer(from, to, amount.sub(taxAmount));
}
function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {
if (tokenAmount == 0) {
return;
}
if (!tradingOpen) {
return;
}
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 manualSwap() external {
require(_msgSender() == _taxWallet);
uint256 tokenBalance = balanceOf(address(this));
if (tokenBalance > 0) {
swapTokensForEth(tokenBalance);
}
uint256 ethBalance = address(this).balance;
if (ethBalance > 0) {
sendETHToFee(ethBalance);
}
}
// Threshold management functions
/** @dev Set a new threshold to trigger swapBack.
* @notice Can only be called by the current owner.
*/
function setTaxSwapThreshold(uint256 newTax) external onlyOwner {
_taxSwapThreshold = newTax;
}
/** @dev Set a new max amount to swap back.
* @notice Can only be called by the current owner.
*/
function setMaxTaxSwap(uint256 newTax) external onlyOwner {
_maxTaxSwap = newTax;
}
// Internal functions
function sendETHToFee(uint256 amount) private {
_taxWallet.transfer(amount);
}
receive() external payable {}
function min(uint256 a, uint256 b) private pure returns (uint256) {
return (a > b) ? b : a;
}
function isContract(address account) private view returns (bool) {
uint256 size;
assembly {
size := extcodesize(account)
}
return size > 0;
}
}