Contract Source Code:
File 1 of 1 : WempToken
// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `recipient`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address recipient, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `sender` to `recipient` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
}
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
/*
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor () {
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
_;
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
emit OwnershipTransferred(_owner, address(0));
_owner = address(0);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
emit OwnershipTransferred(_owner, newOwner);
_owner = newOwner;
}
}
/**
* @dev Contract module which allows children to implement an emergency stop
* mechanism that can be triggered by an authorized account.
*
* This module is used through inheritance. It will make available the
* modifiers `whenNotPaused` and `whenPaused`, which can be applied to
* the functions of your contract. Note that they will not be pausable by
* simply including this module, only once the modifiers are put in place.
*/
abstract contract Pausable is Context {
/**
* @dev Emitted when the pause is triggered by `account`.
*/
event Paused(address account);
/**
* @dev Emitted when the pause is lifted by `account`.
*/
event Unpaused(address account);
bool private _paused;
/**
* @dev Initializes the contract in unpaused state.
*/
constructor () {
_paused = false;
}
/**
* @dev Returns true if the contract is paused, and false otherwise.
*/
function paused() public view virtual returns (bool) {
return _paused;
}
/**
* @dev Modifier to make a function callable only when the contract is not paused.
*
* Requirements:
*
* - The contract must not be paused.
*/
modifier whenNotPaused() {
require(!paused(), "Pausable: paused");
_;
}
/**
* @dev Modifier to make a function callable only when the contract is paused.
*
* Requirements:
*
* - The contract must be paused.
*/
modifier whenPaused() {
require(paused(), "Pausable: not paused");
_;
}
/**
* @dev Triggers stopped state.
*
* Requirements:
*
* - The contract must not be paused.
*/
function _pause() internal virtual whenNotPaused {
_paused = true;
emit Paused(_msgSender());
}
/**
* @dev Returns to normal state.
*
* Requirements:
*
* - The contract must be paused.
*/
function _unpause() internal virtual whenPaused {
_paused = false;
emit Unpaused(_msgSender());
}
}
/**
* @dev Wrappers over Solidity's arithmetic operations.
*
* NOTE: `SafeMath` is no longer needed starting with Solidity 0.8. The compiler
* now has built in overflow checking.
*/
library SafeMath {
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the substraction of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*
* _Available since v3.4._
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*
* _Available since v3.4._
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the addition of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `+` operator.
*
* Requirements:
*
* - Addition cannot overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
return a + b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
return a - b;
}
/**
* @dev Returns the multiplication of two unsigned integers, reverting on
* overflow.
*
* Counterpart to Solidity's `*` operator.
*
* Requirements:
*
* - Multiplication cannot overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
return a * b;
}
/**
* @dev Returns the integer division of two unsigned integers, reverting on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator.
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
return a / b;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting when dividing by zero.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
return a % b;
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {trySub}.
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b <= a, errorMessage);
return a - b;
}
}
/**
* @dev Returns the integer division of two unsigned integers, reverting with custom message on
* division by zero. The result is rounded towards zero.
*
* Counterpart to Solidity's `/` operator. Note: this function uses a
* `revert` opcode (which leaves remaining gas untouched) while Solidity
* uses an invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a / b;
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* reverting with custom message when dividing by zero.
*
* CAUTION: This function is deprecated because it requires allocating memory for the error
* message unnecessarily. For custom revert reasons use {tryMod}.
*
* Counterpart to Solidity's `%` operator. This function uses a `revert`
* opcode (which leaves remaining gas untouched) while Solidity uses an
* invalid opcode to revert (consuming all remaining gas).
*
* Requirements:
*
* - The divisor cannot be zero.
*/
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
unchecked {
require(b > 0, errorMessage);
return a % b;
}
}
}
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize, which returns 0 for contracts in
// construction, since the code is only stored at the end of the
// constructor execution.
uint256 size;
// solhint-disable-next-line no-inline-assembly
assembly { size := extcodesize(account) }
return size > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
// solhint-disable-next-line avoid-low-level-calls, avoid-call-value
(bool success, ) = recipient.call{ value: amount }("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain`call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCall(target, data, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
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");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
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");
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{ value: value }(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
require(isContract(target), "Address: static call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.staticcall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
require(isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return _verifyCallResult(success, returndata, errorMessage);
}
function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
if (success) {
return returndata;
} else {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
// solhint-disable-next-line no-inline-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
interface IUniswapV2Factory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
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(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
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;
}
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin guidelines: functions revert instead
* of returning `false` on failure. This behavior is nonetheless conventional
* and does not conflict with the expectations of ERC20 applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract WempToken is Context, IERC20, IERC20Metadata, Ownable, Pausable {
using SafeMath for uint256;
using Address for address;
mapping (address => uint256) private _rOwned;
mapping (address => uint256) private _tOwned;
mapping (address => mapping (address => uint256)) private _allowances;
mapping (address => bool) private pausedAddress;
mapping (address => bool) private _isExcluded;
mapping (address => bool) private _isExcludedFromDexFee;
mapping (address => bool) private _isIncludedInFee; // Tax Flag
address[] private _excluded;
uint256 private constant MAX = ~uint256(0);
uint256 private constant initialSupply = 1000000 * 10**9 * 10**18; // initial supply
uint256 private _tTotal = initialSupply - (initialSupply * 40 / 100); // supply after deflation
uint256 private _rTotal = (MAX - (MAX % _tTotal));
uint256 private _tFeeTotal;
string private constant _name = "Women Empowerment Token";
string private constant _symbol = "WEMP";
uint8 private constant _decimals = 18;
uint256 public taxFee = 2;
uint256 private previousTaxFee = taxFee;
uint256 public liquidityFee = 1;
uint256 private previousLiquidityFee = liquidityFee;
uint256 public transactionBurn = 1;
uint256 private previousTransactionBurn = transactionBurn;
uint256 public charityFee = 1;
uint256 private previousCharityFee = charityFee;
uint256 public womenWelfareFee = 1;
uint256 private previousWomenWelfareFee = womenWelfareFee;
bool public enableFee = true;
bool private inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
uint256 private _amount_burnt;
uint256 public liquidityFeeBalance;
uint256 public constant liquidityFeeToSell = 10000 * 10**18;
IUniswapV2Router02 public immutable uniswapV2Router;
address private constant UNISWAPV2ROUTER = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
address public uniswapV2Pair;
address public charityWallet;
address public welfareWallet;
event FeeEnable(bool enableFee);
event SetMaxTxPercent(uint256 maxPercent);
event SetCharityAddress(address indexed charityAddress);
event SetCharityFeePercent(uint256 chartyFeePercent);
event SetBurnPercent(uint256 burnPercent);
event SetTaxFeePercent(uint256 taxFeePercent);
event SetLiquidityFeePercent(uint256 liquidityFeePercent);
event ExcludeFromFee(address indexed account, bool includeInFee);
event IncludeInFee(address indexed account, bool includeInFee);
event ExcludeFromDexFee(address indexed account, bool includeInDexFee);
event IncludeInDexFee(address indexed account, bool includeInDexFee);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
event ExternalTokenTransfered(address indexed externalAddress,address indexed toAddress, uint amount);
event EthFromContractTransferred(uint amount);
event LiquidityAddedFromSwap(uint amountToken,uint amountEth,uint liquidity);
modifier lockTheSwap {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
constructor (address _charityWallet, address _welfareWallet) {
require ( _charityWallet != address ( 0 ) , "WempToken: _charityWallet is a zero address") ;
require ( _welfareWallet != address ( 0 ) , "WempToken: _welfareWallet is a zero address") ;
_rOwned[_msgSender()] = _rTotal;
charityWallet = _charityWallet;
welfareWallet = _welfareWallet;
emit Transfer(address(0), _msgSender(), initialSupply);
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(UNISWAPV2ROUTER);
// Create a uniswap pair for this new token
uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
// set the rest of the contract variables
uniswapV2Router = _uniswapV2Router;
tokenDeflation();
}
/**
* @dev Returns the name of the token.
*/
function name() external view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() external view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5,05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() external view virtual override returns (uint8) {
return _decimals;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() external view virtual override returns (uint256) {
return _tTotal - _amount_burnt;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
if (_isExcluded[account]) return _tOwned[account];
return tokenFromReflection(_rOwned[account]);
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `recipient` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address recipient, uint256 amount) external virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) external view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) external virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* Requirements:
*
* - `sender` and `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
* - the caller must have allowance for ``sender``'s tokens of at least
* `amount`.
*/
function transferFrom(address sender, address recipient, uint256 amount) external virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
_approve(sender, _msgSender(), currentAllowance - amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) external virtual returns (bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender] + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) external virtual returns (bool) {
uint256 currentAllowance = _allowances[_msgSender()][spender];
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(_msgSender(), spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Pause `contract` - pause events.
*
* See {ERC20Pausable-_pause}.
*/
function pauseContract() external virtual onlyOwner {
_pause();
}
/**
* @dev Pause `contract` - pause events.
*
* See {ERC20Pausable-_pause}.
*/
function unPauseContract() external virtual onlyOwner {
_unpause();
}
/**
* @dev Pause `contract` - pause events.
*
* See {ERC20Pausable-_pause}.
*/
function pauseAddress(address account) external virtual onlyOwner {
excludeFromReward(account);
pausedAddress[account] = true;
}
/**
* @dev Pause `contract` - pause events.
*
* See {ERC20Pausable-_pause}.
*/
function unPauseAddress(address account) external virtual onlyOwner {
includeInReward(account);
pausedAddress[account] = false;
}
/**
* @dev Returns true if the address is paused, and false otherwise.
*/
function isAddressPaused(address account) external view virtual returns (bool) {
return pausedAddress[account];
}
function tokenDeflation() internal {
uint256 deflationAmount = initialSupply * 40 / 100;
emit Transfer(_msgSender(), address(0), deflationAmount);
}
function totalFees() external view returns (uint256) {
return _tFeeTotal;
}
function tokenFromReflection(uint256 rAmount) public view returns(uint256) {
require(rAmount <= _rTotal, "Amount must be less than total reflections");
uint256 currentRate = getRate();
return rAmount.div(currentRate);
}
function excludeFromReward(address account) public onlyOwner {
require(!_isExcluded[account], "Account is already excluded");
if(_rOwned[account] > 0) {
_tOwned[account] = tokenFromReflection(_rOwned[account]);
}
_isExcluded[account] = true;
_excluded.push(account);
}
function includeInReward(address account) public onlyOwner {
require(_isExcluded[account], "Account is not excluded");
for (uint256 i = 0; i < _excluded.length; i++) {
if (_excluded[i] == account) {
_excluded[i] = _excluded[_excluded.length - 1];
_tOwned[account] = 0;
_isExcluded[account] = false;
_excluded.pop();
break;
}
}
}
function isExcludedFromReward(address account) external view returns (bool) {
return _isExcluded[account];
}
function excludeFromDexFee(address account) external onlyOwner {
_isExcludedFromDexFee[account] = true;
emit ExcludeFromDexFee(account, true);
}
function includeInDexFee(address account) external onlyOwner {
_isExcludedFromDexFee[account] = false;
emit IncludeInDexFee(account, false);
}
function isExcludedFromDexFee(address account) external view returns(bool) {
return _isExcludedFromDexFee[account];
}
function excludeFromFee(address account) external onlyOwner {
_isIncludedInFee[account] = false;
emit ExcludeFromFee(account, false);
}
function includeInFee(address account) external onlyOwner {
_isIncludedInFee[account] = true;
emit IncludeInFee(account, true);
}
function isIncludedInFee(address account) external view returns(bool) {
return _isIncludedInFee[account];
}
function setTaxFeePercent(uint256 fee) external onlyOwner {
require((fee + liquidityFee + transactionBurn + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
taxFee = fee;
emit SetTaxFeePercent(taxFee);
}
function setLiquidityFeePercent(uint256 fee) external onlyOwner {
require((taxFee + fee + transactionBurn + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
liquidityFee = fee;
emit SetLiquidityFeePercent(liquidityFee);
}
function setBurnPercent(uint256 burn_percentage) external onlyOwner {
require((taxFee + liquidityFee + burn_percentage + charityFee + womenWelfareFee) < 100, "Total fees should be less than 100%");
transactionBurn = burn_percentage;
emit SetBurnPercent(burn_percentage);
}
function setCharityFeePercent(uint256 fee) external onlyOwner {
require((taxFee + liquidityFee + transactionBurn + fee + womenWelfareFee) < 100, "Total fees should be less than 100%");
charityFee = fee;
emit SetCharityFeePercent(charityFee);
}
function setWomenWelfareFeePercent(uint256 fee) external onlyOwner {
require((taxFee + liquidityFee + transactionBurn + charityFee + fee) < 100, "Total fees should be less than 100%");
womenWelfareFee = fee;
emit SetCharityFeePercent(womenWelfareFee);
}
function updateCharityWallet(address _charityWallet) external onlyOwner {
require(_charityWallet != address(0), "ERC20: Charity address cannot be a zero address");
charityWallet = _charityWallet;
emit SetCharityAddress(_charityWallet);
}
function setSwapAndLiquifyEnabled(bool _enabled) external onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
function setEnableFee(bool enableTax) external onlyOwner {
enableFee = enableTax;
emit FeeEnable(enableTax);
}
function takeReflectionFee(uint256 rFee, uint256 tFee) internal {
_rTotal = _rTotal.sub(rFee);
_tFeeTotal = _tFeeTotal.add(tFee);
}
function getTValues(uint256 amount) internal view returns (uint256, uint256, uint256, uint256, uint256, uint256) {
uint256 tAmount = amount;
uint256 tFee = calculateTaxFee(tAmount);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tCharityFee = calculateCharityFee(tAmount);
uint256 tWelfareFee = calculateWomenWelfareFee(tAmount);
uint256 tBurn = calculateTransactionBurn(tAmount);
{
uint256 amt = tAmount;
uint256 tTransferAmount = amt.sub(tFee).sub(tLiquidity).sub(tBurn).sub(tCharityFee).sub(tWelfareFee);
return (tTransferAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
}
}
function getRValues(uint256 amount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) internal view returns (uint256, uint256, uint256) {
uint256 currentRate = getRate();
uint256 tAmount = amount;
uint256 rAmount = tAmount.mul(currentRate);
uint256 rFee = tFee.mul(currentRate);
uint256 rliquidity = tLiquidity.mul(currentRate);
uint256 rCharityFee = tCharityFee.mul(currentRate);
uint256 rWelfareFee = tWelfareFee.mul(currentRate);
uint256 rBurn = tBurn.mul(currentRate);
{
uint256 amt = rAmount;
uint256 rTransferAmount = amt.sub(rFee).sub(rliquidity).sub(rBurn).sub(rCharityFee).sub(rWelfareFee);
return (rAmount, rTransferAmount, rFee);
}
}
function getRate() internal view returns(uint256) {
(uint256 rSupply, uint256 tSupply) = getCurrentSupply();
return rSupply.div(tSupply);
}
function getCurrentSupply() internal view returns(uint256, uint256) {
uint256 rSupply = _rTotal;
uint256 tSupply = _tTotal;
for (uint256 i = 0; i < _excluded.length; i++) {
if (_rOwned[_excluded[i]] > rSupply || _tOwned[_excluded[i]] > tSupply) return (_rTotal, _tTotal);
rSupply = rSupply.sub(_rOwned[_excluded[i]]);
tSupply = tSupply.sub(_tOwned[_excluded[i]]);
}
if (rSupply < _rTotal.div(_tTotal)) return (_rTotal, _tTotal);
return (rSupply, tSupply);
}
function takeCharityFee(address sender, uint256 tCharityFee) internal {
uint256 currentRate = getRate();
uint256 rCharityFee = tCharityFee.mul(currentRate);
_rOwned[charityWallet] = _rOwned[charityWallet].add(rCharityFee);
if(_isExcluded[charityWallet])
_tOwned[charityWallet] = _tOwned[charityWallet].add(tCharityFee);
if(tCharityFee > 0) emit Transfer(sender, charityWallet, tCharityFee);
}
function takeWomenWelfareFee(address sender, uint256 tWelfareFee) internal {
uint256 currentRate = getRate();
uint256 rWelfareFee = tWelfareFee.mul(currentRate);
_rOwned[welfareWallet] = _rOwned[welfareWallet].add(rWelfareFee);
if(_isExcluded[welfareWallet])
_tOwned[welfareWallet] = _tOwned[welfareWallet].add(tWelfareFee);
if(tWelfareFee > 0) emit Transfer(sender, welfareWallet, tWelfareFee);
}
function takeLiquidityFee(address sender, uint256 tLiquidity) internal {
uint256 currentRate = getRate();
uint256 rLiquidity = tLiquidity.mul(currentRate);
liquidityFeeBalance += tLiquidity;
_rOwned[address(this)] = _rOwned[address(this)].add(rLiquidity);
if(_isExcluded[address(this)])
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
if(tLiquidity > 0) emit Transfer(sender, address(this), tLiquidity);
}
function calculateTaxFee(uint256 _amount) internal view returns (uint256) {
return _amount.mul(taxFee).div(
10**2
);
}
function calculateLiquidityFee(uint256 _amount) internal view returns (uint256) {
return _amount.mul(liquidityFee).div(
10**2
);
}
function calculateTransactionBurn(uint256 _amount) internal view returns (uint256) {
return _amount.mul(transactionBurn).div(
10**2
);
}
function calculateCharityFee(uint256 _amount) internal view returns (uint256) {
return _amount.mul(charityFee).div(
10**2
);
}
function calculateWomenWelfareFee(uint256 _amount) internal view returns (uint256) {
return _amount.mul(womenWelfareFee).div(
10**2
);
}
function removeAllFee() internal {
if(taxFee == 0 && liquidityFee == 0 && transactionBurn == 0 && charityFee == 0 && womenWelfareFee == 0) return;
previousTaxFee = taxFee;
previousLiquidityFee = liquidityFee;
previousTransactionBurn = transactionBurn;
previousCharityFee = charityFee;
previousWomenWelfareFee = womenWelfareFee;
taxFee = 0;
liquidityFee = 0;
transactionBurn = 0;
charityFee = 0;
womenWelfareFee = 0;
}
function restoreAllFee() internal {
taxFee = previousTaxFee;
liquidityFee = previousLiquidityFee;
transactionBurn = previousTransactionBurn;
charityFee = previousCharityFee;
womenWelfareFee = previousWomenWelfareFee;
}
//to recieve ETH from uniswapV2Router when swaping
receive() external payable {}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
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");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Moves tokens `amount` from `sender` to `recipient`.
*
* This is internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `sender` cannot be the zero address.
* - `recipient` cannot be the zero address.
* - `sender` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal {
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");
_beforeTokenTransfer(from, to);
uint256 senderBalance = balanceOf(from);
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
//indicates if fee should be deducted from transfer
bool takeFee = false;
//if any account belongs to _isIncludedInFee account then take fee
//else remove fee
if(enableFee && (_isIncludedInFee[from] || _isIncludedInFee[to])){
if((from == uniswapV2Pair && _isExcludedFromDexFee[to]) || (to == uniswapV2Pair && _isExcludedFromDexFee[from])) takeFee = false;
else takeFee = true;
}
if(takeFee) _swapAndLiquify(from);
//transfer amount, it will take tax, burn and charity amount
_tokenTransfer(from,to,amount,takeFee);
}
//this method is responsible for taking all fee, if takeFee is true
function _tokenTransfer(address sender, address recipient, uint256 amount,bool takeFee) internal {
if(!takeFee)
removeAllFee();
if (_isExcluded[sender] && !_isExcluded[recipient]) {
_transferFromExcluded(sender, recipient, amount);
} else if (!_isExcluded[sender] && _isExcluded[recipient]) {
_transferToExcluded(sender, recipient, amount);
} else if (_isExcluded[sender] && _isExcluded[recipient]) {
_transferBothExcluded(sender, recipient, amount);
} else {
_transferStandard(sender, recipient, amount);
}
if(!takeFee)
restoreAllFee();
}
function _transferStandard(address sender, address recipient, uint256 tAmount) internal {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
takeReflectionFee(rFee, tFee);
takeLiquidityFee(sender, tLiquidity);
takeCharityFee(sender, tCharityFee);
takeWomenWelfareFee(sender, tWelfareFee);
if(tBurn > 0) {
_amount_burnt += tBurn;
emit Transfer(sender, address(0), tBurn);
}
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferBothExcluded(address sender, address recipient, uint256 tAmount) internal {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
takeReflectionFee(rFee, tFee);
takeLiquidityFee(sender, tLiquidity);
takeCharityFee(sender, tCharityFee);
takeWomenWelfareFee(sender, tWelfareFee);
if(tBurn > 0) {
_amount_burnt += tBurn;
emit Transfer(sender, address(0), tBurn);
}
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferToExcluded(address sender, address recipient, uint256 tAmount) internal {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_tOwned[recipient] = _tOwned[recipient].add(tTransferAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
takeReflectionFee(rFee, tFee);
takeLiquidityFee(sender, tLiquidity);
takeCharityFee(sender, tCharityFee);
takeWomenWelfareFee(sender, tWelfareFee);
if(tBurn > 0) {
_amount_burnt += tBurn;
emit Transfer(sender, address(0), tBurn);
}
emit Transfer(sender, recipient, tTransferAmount);
}
function _transferFromExcluded(address sender, address recipient, uint256 tAmount) internal {
(uint256 tTransferAmount, uint256 tFee, uint256 tLiquidity, uint256 tBurn, uint256 tCharityFee, uint256 tWelfareFee) = getTValues(tAmount);
(uint256 rAmount, uint256 rTransferAmount, uint256 rFee) = getRValues(tAmount, tFee, tLiquidity, tBurn, tCharityFee, tWelfareFee);
_tOwned[sender] = _tOwned[sender].sub(tAmount);
_rOwned[sender] = _rOwned[sender].sub(rAmount);
_rOwned[recipient] = _rOwned[recipient].add(rTransferAmount);
takeReflectionFee(rFee, tFee);
takeLiquidityFee(sender, tLiquidity);
takeCharityFee(sender, tCharityFee);
takeWomenWelfareFee(sender, tWelfareFee);
if(tBurn > 0) {
_amount_burnt += tBurn;
emit Transfer(sender, address(0), tBurn);
}
emit Transfer(sender, recipient, tTransferAmount);
}
function _swapAndLiquify(address from) internal {
if(from != uniswapV2Pair && liquidityFeeBalance >= liquidityFeeToSell) {
bool initialFeeState = enableFee;
// remove fee if initialFeeState was true
if(initialFeeState) enableFee = false;
// is the token balance of this contract address over the min number of
// tokens that we need to initiate a swap + liquidity lock?
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
if(!inSwapAndLiquify && swapAndLiquifyEnabled && liquidityFeeBalance >= liquidityFeeToSell) {
uint256 fee = liquidityFeeBalance;
liquidityFeeBalance = 0;
//add liquidity
swapAndLiquify(fee, owner());
}
// enable fee if initialFeeState was true
if(initialFeeState) enableFee = true;
}
}
function swapAndLiquify(uint256 contractTokenBalance, address account) internal lockTheSwap {
// split the contract balance into halves
uint256 half = contractTokenBalance.div(2);
uint256 otherHalf = contractTokenBalance.sub(half);
// capture the contract's current ETH balance.
// this is so that we can capture exactly the amount of ETH that the
// swap creates, and not make the liquidity event include any ETH that
// has been manually sent to the contract
uint256 initialBalance = address(this).balance;
// swap tokens for ETH
swapTokensForEth(half, address(this)); // <- this breaks the ETH -> HATE swap when swap+liquify is triggered
// how much ETH did we just swap into?
uint256 newBalance = address(this).balance.sub(initialBalance);
// add liquidity to uniswap
addLiquidity(otherHalf, newBalance, account);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
function swapTokensForEth(uint256 tokenAmount, address swapAddress) internal {
// generate the uniswap pair path of token -> weth
address[] memory path = new address[](2);
path[0] = address(this);
path[1] = uniswapV2Router.WETH();
_approve(address(this), address(uniswapV2Router), tokenAmount);
// make the swap
uniswapV2Router.swapExactTokensForETHSupportingFeeOnTransferTokens(
tokenAmount,
0, // accept any amount of ETH
path,
swapAddress,
block.timestamp
);
}
function addLiquidity(uint256 tokenAmount, uint256 ethAmount, address account) internal {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
(uint amountToken, uint amountETH, uint liquidity) = uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
account,
block.timestamp
);
emit LiquidityAddedFromSwap(amountToken,amountETH,liquidity);
}
function withdrawToken(address _tokenContract, uint256 _amount) external onlyOwner {
require(_tokenContract != address(0), "Address cant be zero address");
IERC20 tokenContract = IERC20(_tokenContract);
tokenContract.transfer(msg.sender, _amount);
emit ExternalTokenTransfered(_tokenContract, msg.sender, _amount);
}
function getBalance() public view returns (uint256) {
return address(this).balance;
}
function withdrawEthFromContract(uint256 amount) public onlyOwner {
require(amount <= getBalance());
address payable _owner = payable(owner());
_owner.transfer(amount);
emit EthFromContractTransferred(amount);
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be to transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(address from, address to) internal virtual {
require(!paused(), "ERC20Pausable: token transfer while contract paused");
require(!pausedAddress[from], "ERC20Pausable: token transfer while from-address paused");
require(!pausedAddress[to], "ERC20Pausable: token transfer while to-address paused");
}
}