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"content": "/**\nOld Ethercoin $OEC\nhttps://t.me/Oldethercoin_Erc20\nhttps://medium.com/@oldethercoin/oldethercoin-d2918ffb2a4c\n*/\n\n\n//SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.4;\n \nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n}\n \ninterface IERC20 {\n function totalSupply() external view returns (uint256);\n \n function balanceOf(address account) external view returns (uint256);\n \n function transfer(address recipient, uint256 amount) external returns (bool);\n \n function allowance(address owner, address spender) external view returns (uint256);\n \n function approve(address spender, uint256 amount) external returns (bool);\n \n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) external returns (bool);\n \n event Transfer(address indexed from, address indexed to, uint256 value);\n event Approval(\n address indexed owner,\n address indexed spender,\n uint256 value\n );\n}\n \ncontract Ownable is Context {\n address private _owner;\n address private _previousOwner;\n event OwnershipTransferred(\n address indexed previousOwner,\n address indexed newOwner\n );\n \n constructor() {\n address msgSender = _msgSender();\n _owner = msgSender;\n emit OwnershipTransferred(address(0), msgSender);\n }\n \n function owner() public view returns (address) {\n return _owner;\n }\n \n modifier onlyOwner() {\n require(_owner == _msgSender(), \"Ownable: caller is not the owner\");\n _;\n }\n \n function renounceOwnership() public virtual onlyOwner {\n emit OwnershipTransferred(_owner, address(0));\n _owner = address(0);\n }\n \n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n emit OwnershipTransferred(_owner, newOwner);\n _owner = newOwner;\n }\n \n}\n \nlibrary SafeMath {\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n require(c >= a, \"SafeMath: addition overflow\");\n return c;\n }\n \n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return sub(a, b, \"SafeMath: subtraction overflow\");\n }\n \n function sub(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n require(b <= a, errorMessage);\n uint256 c = a - b;\n return c;\n }\n \n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n uint256 c = a * b;\n require(c / a == b, \"SafeMath: multiplication overflow\");\n return c;\n }\n \n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return div(a, b, \"SafeMath: division by zero\");\n }\n \n function div(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n require(b > 0, errorMessage);\n uint256 c = a / b;\n return c;\n }\n}\n \ninterface IUniswapV2Factory {\n function createPair(address tokenA, address tokenB)\n external\n returns (address pair);\n}\n \ninterface IUniswapV2Router02 {\n function swapExactTokensForETHSupportingFeeOnTransferTokens(\n uint256 amountIn,\n uint256 amountOutMin,\n address[] calldata path,\n address to,\n uint256 deadline\n ) external;\n \n function factory() external pure returns (address);\n \n function WETH() external pure returns (address);\n \n function addLiquidityETH(\n address token,\n uint256 amountTokenDesired,\n uint256 amountTokenMin,\n uint256 amountETHMin,\n address to,\n uint256 deadline\n )\n external\n payable\n returns (\n uint256 amountToken,\n uint256 amountETH,\n uint256 liquidity\n );\n}\n \ncontract OldEthercoin is Context, IERC20, Ownable {\n \n using SafeMath for uint256;\n \n string private constant _name = \"Old Ethercoin\";\n string private constant _symbol =unicode\"OEC\";\n uint8 private constant _decimals = 9;\n \n mapping(address => uint256) private _rOwned;\n mapping(address => uint256) private _tOwned;\n mapping(address => mapping(address => uint256)) private _allowances;\n mapping(address => bool) private _isExcludedFromFee;\n uint256 private constant MAX = ~uint256(0);\n uint256 private constant _tTotal = 100000000000 * 10**9;\n uint256 private _rTotal = (MAX - (MAX % _tTotal));\n uint256 private _tFeeTotal;\n uint256 public launchBlock;\n \n //Buy Fee\n uint256 private _redisFeeOnBuy = 0;\n uint256 private _taxFeeOnBuy =10;\n \n //Sell Fee\n uint256 private _redisFeeOnSell = 0;\n uint256 private _taxFeeOnSell = 20;\n \n //Original Fee\n uint256 private _redisFee = _redisFeeOnSell;\n uint256 private _taxFee = _taxFeeOnSell;\n \n uint256 private _previousredisFee = _redisFee;\n uint256 private _previoustaxFee = _taxFee;\n \n mapping(address => bool) public bots;\n mapping(address => uint256) private cooldown;\n \n address payable private _developmentAddress = payable(0xe8b377891f82fbd8B0c82E2a875a1a753bd5cad7);\n address payable private _marketingAddress = payable(0xe8b377891f82fbd8B0c82E2a875a1a753bd5cad7);\n \n IUniswapV2Router02 public uniswapV2Router;\n address public uniswapV2Pair;\n \n bool private tradingOpen;\n bool private inSwap = false;\n bool private swapEnabled = true;\n \n uint256 public _maxTxAmount = 2000000000 * 10**9; \n uint256 public _maxWalletSize = 2000000000 * 10**9; \n uint256 public _swapTokensAtAmount = 10000000 * 10**9; \n \n event MaxTxAmountUpdated(uint256 _maxTxAmount);\n modifier lockTheSwap {\n inSwap = true;\n _;\n inSwap = false;\n }\n \n constructor() {\n \n _rOwned[_msgSender()] = _rTotal;\n \n IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);\n uniswapV2Router = _uniswapV2Router;\n uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())\n .createPair(address(this), _uniswapV2Router.WETH());\n \n _isExcludedFromFee[owner()] = true;\n _isExcludedFromFee[address(this)] = true;\n _isExcludedFromFee[_developmentAddress] = true;\n _isExcludedFromFee[_marketingAddress] = true;\n\n emit Transfer(address(0), _msgSender(), _tTotal);\n }\n \n function name() public pure returns (string memory) {\n return _name;\n }\n \n function symbol() public pure returns (string memory) {\n return _symbol;\n }\n \n function decimals() public pure returns (uint8) {\n return _decimals;\n }\n \n function totalSupply() public pure override returns (uint256) {\n return _tTotal;\n }\n \n function balanceOf(address account) public view override returns (uint256) {\n return tokenFromReflection(_rOwned[account]);\n }\n \n function transfer(address recipient, uint256 amount)\n public\n override\n returns (bool)\n {\n _transfer(_msgSender(), recipient, amount);\n return true;\n }\n \n function allowance(address owner, address spender)\n public\n view\n override\n returns (uint256)\n {\n return _allowances[owner][spender];\n }\n \n function approve(address spender, uint256 amount)\n public\n override\n returns (bool)\n {\n _approve(_msgSender(), spender, amount);\n return true;\n }\n \n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) public override returns (bool) {\n _transfer(sender, recipient, amount);\n _approve(\n sender,\n _msgSender(),\n _allowances[sender][_msgSender()].sub(\n amount,\n \"ERC20: transfer amount exceeds allowance\"\n )\n );\n return true;\n }\n \n function tokenFromReflection(uint256 rAmount)\n private\n view\n returns (uint256)\n {\n require(\n rAmount <= _rTotal,\n \"Amount must be less than total reflections\"\n );\n uint256 currentRate = _getRate();\n return rAmount.div(currentRate);\n }\n \n function removeAllFee() private {\n if (_redisFee == 0 && _taxFee == 0) return;\n \n _previousredisFee = _redisFee;\n _previoustaxFee = _taxFee;\n \n _redisFee = 0;\n _taxFee = 0;\n }\n \n function restoreAllFee() private {\n _redisFee = _previousredisFee;\n _taxFee = _previoustaxFee;\n }\n \n function _approve(\n address owner,\n address spender,\n uint256 amount\n ) private {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n \n function _transfer(\n address from,\n address to,\n uint256 amount\n ) private {\n require(from != address(0), \"ERC20: transfer from the zero address\");\n require(to != address(0), \"ERC20: transfer to the zero address\");\n require(amount > 0, \"Transfer amount must be greater than zero\");\n \n if (from != owner() && to != owner()) {\n \n //Trade start check\n if (!tradingOpen) {\n require(from == owner(), \"TOKEN: This account cannot send tokens until trading is enabled\");\n }\n \n require(amount <= _maxTxAmount, \"TOKEN: Max Transaction Limit\");\n require(!bots[from] && !bots[to], \"TOKEN: Your account is blacklisted!\");\n \n if(to != uniswapV2Pair) {\n require(balanceOf(to) + amount < _maxWalletSize, \"TOKEN: Balance exceeds wallet size!\");\n }\n \n uint256 contractTokenBalance = balanceOf(address(this));\n bool canSwap = contractTokenBalance >= _swapTokensAtAmount;\n \n if(contractTokenBalance >= _maxTxAmount)\n {\n contractTokenBalance = _maxTxAmount;\n }\n \n if (canSwap && !inSwap && from != uniswapV2Pair && swapEnabled && !_isExcludedFromFee[from] && !_isExcludedFromFee[to]) {\n swapTokensForEth(contractTokenBalance);\n uint256 contractETHBalance = address(this).balance;\n if (contractETHBalance > 0) {\n sendETHToFee(address(this).balance);\n }\n }\n }\n \n bool takeFee = true;\n \n //Transfer Tokens\n if ((_isExcludedFromFee[from] || _isExcludedFromFee[to]) || (from != uniswapV2Pair && to != uniswapV2Pair)) {\n takeFee = false;\n } else {\n \n //Set Fee for Buys\n if(from == uniswapV2Pair && to != address(uniswapV2Router)) {\n _redisFee = _redisFeeOnBuy;\n _taxFee = _taxFeeOnBuy;\n }\n \n //Set Fee for Sells\n if (to == uniswapV2Pair && from != address(uniswapV2Router)) {\n _redisFee = _redisFeeOnSell;\n _taxFee = _taxFeeOnSell;\n }\n \n }\n \n _tokenTransfer(from, to, amount, takeFee);\n }\n \n function swapTokensForEth(uint256 tokenAmount) private lockTheSwap {\n address[] memory path = new address[](2);\n path[0] = address(this);\n path[1] = uniswapV2Router.WETH();\n _approve(address(this), address(uniswapV2Router), tokenAmount);\n uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(\n tokenAmount,\n 0,\n path,\n address(this),\n block.timestamp\n );\n }\n \n function sendETHToFee(uint256 amount) private {\n _developmentAddress.transfer(amount.mul(50).div(100));\n _marketingAddress.transfer(amount.mul(50).div(100));\n }\n \n function setTrading(bool _tradingOpen) public onlyOwner {\n tradingOpen = _tradingOpen;\n }\n \n function manualswap() external {\n require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);\n uint256 contractBalance = balanceOf(address(this));\n swapTokensForEth(contractBalance);\n }\n \n function manualsend() external {\n require(_msgSender() == _developmentAddress || _msgSender() == _marketingAddress);\n uint256 contractETHBalance = address(this).balance;\n sendETHToFee(contractETHBalance);\n }\n \n function blockBots(address[] memory bots_) public onlyOwner {\n for (uint256 i = 0; i < bots_.length; i++) {\n bots[bots_[i]] = true;\n }\n }\n \n function unblockBot(address notbot) public onlyOwner {\n bots[notbot] = false;\n }\n \n function _tokenTransfer(\n address sender,\n address recipient,\n uint256 amount,\n bool takeFee\n ) private {\n if (!takeFee) removeAllFee();\n _transferStandard(sender, recipient, amount);\n if (!takeFee) restoreAllFee();\n }\n \n function _transferStandard(\n address sender,\n address recipient,\n uint256 tAmount\n ) private {\n (\n uint256 rAmount,\n uint256 rTransferAmount,\n uint256 rFee,\n uint256 tTransferAmount,\n uint256 tFee,\n uint256 tTeam\n ) = _getValues(tAmount);\n _rOwned[sender] = _rOwned[sender].sub(rAmount);\n _rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);\n _takeTeam(tTeam);\n _reflectFee(rFee, tFee);\n emit Transfer(sender, recipient, tTransferAmount);\n }\n \n function _takeTeam(uint256 tTeam) private {\n uint256 currentRate = _getRate();\n uint256 rTeam = tTeam.mul(currentRate);\n _rOwned[address(this)] = _rOwned[address(this)].add(rTeam);\n }\n \n function _reflectFee(uint256 rFee, uint256 tFee) private {\n _rTotal = _rTotal.sub(rFee);\n _tFeeTotal = _tFeeTotal.add(tFee);\n }\n \n receive() external payable {}\n \n function _getValues(uint256 tAmount)\n private\n view\n returns (\n uint256,\n uint256,\n uint256,\n uint256,\n uint256,\n uint256\n )\n {\n (uint256 tTransferAmount, uint256 tFee, uint256 tTeam) =\n _getTValues(tAmount, _redisFee, _taxFee);\n uint256 currentRate = _getRate();\n (uint256 rAmount, uint256 rTransferAmount, uint256 rFee) =\n _getRValues(tAmount, tFee, tTeam, currentRate);\n \n return (rAmount, rTransferAmount, rFee, tTransferAmount, tFee, tTeam);\n }\n \n function _getTValues(\n uint256 tAmount,\n uint256 redisFee,\n uint256 taxFee\n )\n private\n pure\n returns (\n uint256,\n uint256,\n uint256\n )\n {\n uint256 tFee = tAmount.mul(redisFee).div(100);\n uint256 tTeam = tAmount.mul(taxFee).div(100);\n uint256 tTransferAmount = tAmount.sub(tFee).sub(tTeam);\n \n return (tTransferAmount, tFee, tTeam);\n }\n \n function _getRValues(\n uint256 tAmount,\n uint256 tFee,\n uint256 tTeam,\n uint256 currentRate\n )\n private\n pure\n returns (\n uint256,\n uint256,\n uint256\n )\n {\n uint256 rAmount = tAmount.mul(currentRate);\n uint256 rFee = tFee.mul(currentRate);\n uint256 rTeam = tTeam.mul(currentRate);\n uint256 rTransferAmount = rAmount.sub(rFee).sub(rTeam);\n \n return (rAmount, rTransferAmount, rFee);\n }\n \n function _getRate() private view returns (uint256) {\n (uint256 rSupply, uint256 tSupply) = _getCurrentSupply();\n \n return rSupply.div(tSupply);\n }\n \n function _getCurrentSupply() private view returns (uint256, uint256) {\n uint256 rSupply = _rTotal;\n uint256 tSupply = _tTotal;\n if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);\n \n return (rSupply, tSupply);\n }\n \n function setFee(uint256 redisFeeOnBuy, uint256 redisFeeOnSell, uint256 taxFeeOnBuy, uint256 taxFeeOnSell) public onlyOwner {\n _redisFeeOnBuy = redisFeeOnBuy;\n _redisFeeOnSell = redisFeeOnSell;\n \n _taxFeeOnBuy = taxFeeOnBuy;\n _taxFeeOnSell = taxFeeOnSell;\n }\n \n //Set minimum tokens required to swap.\n function setMinSwapTokensThreshold(uint256 swapTokensAtAmount) public onlyOwner {\n _swapTokensAtAmount = swapTokensAtAmount;\n }\n \n //Set minimum tokens required to swap.\n function toggleSwap(bool _swapEnabled) public onlyOwner {\n swapEnabled = _swapEnabled;\n }\n \n \n //Set maximum transaction\n function setMaxTxnAmount(uint256 maxTxAmount) public onlyOwner {\n _maxTxAmount = maxTxAmount;\n }\n \n function setMaxWalletSize(uint256 maxWalletSize) public onlyOwner {\n _maxWalletSize = maxWalletSize;\n }\n \n function excludeMultipleAccountsFromFees(address[] calldata accounts, bool excluded) public onlyOwner {\n for(uint256 i = 0; i < accounts.length; i++) {\n _isExcludedFromFee[accounts[i]] = excluded;\n }\n }\n}"
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