Contract Source Code:
File 1 of 1 : Wallphy
pragma solidity 0.7.6;
// SPDX-License-Identifier: Unlicensed
pragma experimental ABIEncoderV2;
interface IERC20 {
function decimals() external view returns (uint8);
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 Wrappers over Solidity's arithmetic operations with added overflow
* checks.
*
* Arithmetic operations in Solidity wrap on overflow. This can easily result
* in bugs, because programmers usually assume that an overflow raises an
* error, which is the standard behavior in high level programming languages.
* `SafeMath` restores this intuition by reverting the transaction when an
* operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeMath {
/**
* @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) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
/**
* @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 sub(a, b, "SafeMath: subtraction overflow");
}
/**
* @dev Returns the subtraction of two unsigned integers, reverting with custom message on
* overflow (when the result is negative).
*
* Counterpart to Solidity's `-` operator.
*
* Requirements:
*
* - Subtraction cannot overflow.
*/
function sub(
uint256 a,
uint256 b,
string memory errorMessage
) internal pure returns (uint256) {
require(b <= a, errorMessage);
uint256 c = a - b;
return c;
}
/**
* @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) {
// 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 0;
}
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) internal pure returns (uint256) {
return div(a, b, "SafeMath: division by zero");
}
/**
* @dev Returns the integer division of two unsigned integers. Reverts 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) {
require(b > 0, errorMessage);
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts 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 mod(a, b, "SafeMath: modulo by zero");
}
/**
* @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
* Reverts with custom message 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,
string memory errorMessage
) internal pure returns (uint256) {
require(b != 0, errorMessage);
return a % b;
}
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes memory) {
this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
return msg.data;
}
}
/**
* @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) {
// According to EIP-1052, 0x0 is the value returned for not-yet created accounts
// and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned
// for accounts without code, i.e. `keccak256('')`
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly {
codehash := extcodehash(account)
}
return (codehash != accountHash && codehash != 0x0);
}
/**
* @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"
);
return _functionCallWithValue(target, data, value, errorMessage);
}
function _functionCallWithValue(
address target,
bytes memory data,
uint256 weiValue,
string memory errorMessage
) private returns (bytes memory) {
require(isContract(target), "Address: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.call{value: weiValue}(
data
);
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);
}
}
}
}
/**
* @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.
*/
contract Ownable is Context {
address private _owner;
address private _previousOwner;
uint256 private _lockTime;
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
constructor() {
//internal
address msgSender = _msgSender();
_owner = msgSender;
emit OwnershipTransferred(address(0), msgSender);
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view 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;
}
function geUnlockTime() public view returns (uint256) {
return _lockTime;
}
//Locks the contract for owner for the amount of time provided
function lock(uint256 time) public virtual onlyOwner {
_previousOwner = _owner;
_owner = address(0);
_lockTime = block.timestamp + time;
emit OwnershipTransferred(_owner, address(0));
}
//Unlocks the contract for owner when _lockTime is exceeds
function unlock() public virtual {
require(
_previousOwner == msg.sender,
"You don't have permission to unlock"
);
require(block.timestamp > _lockTime, "Contract is locked until 7 days");
emit OwnershipTransferred(_owner, _previousOwner);
_owner = _previousOwner;
}
}
// pragma solidity >=0.5.0;
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;
}
// pragma solidity >=0.5.0;
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 Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
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 burn(address to)
external
returns (uint256 amount0, uint256 amount1);
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;
}
// pragma solidity >=0.6.2;
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);
}
// pragma solidity >=0.6.2;
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;
}
/// @title Wallphy Token Contract
contract Wallphy is Context, IERC20, Ownable {
using SafeMath for uint256;
using Address for address;
mapping(address => uint256) private _tOwned;
mapping(address => mapping(address => uint256)) private _allowances;
mapping(address => bool) private _isExcludedFromFee;
uint256 private _tTotal = 1000000000000000 * 10**18;
string private _name = "Wallphy";
string private _symbol = "Wallphy";
uint8 private _decimals = 18;
uint256 public _taxFee = 12;
uint256 public _liquidityFee = 3;
uint256 public _additionalTax = 10;
/// @notice Above this amount, the additionalTax will be charged on transfers
uint256 public _additionalTaxThreshold = _tTotal.mul(25).div(10000);
address public devFeeWallet = 0x67a76c888fA3576984142227D2ea31091739853F;
mapping(address => bool) private transferBlacklist;
/// @notice Token transfers associated with trades on a DEX (Uniswap) are taxed
bool public taxOnlyDex = true;
uint256 public _maxTxAmount = _tTotal.mul(1).div(100);
uint256 public taxYetToBeSentToDev;
uint256 private minimumDevTaxDistributionThreshold = 0;
uint256 public taxYetToBeLiquified;
uint256 private numTokensSellToAddToLiquidity = 0;
IUniswapV2Router02 public uniswapV2Router;
address public uniswapV2Pair;
bool private inSwapAndLiquify;
bool public swapAndLiquifyEnabled = true;
bool private inSwapAndSendDev;
bool public swapAndSendDevEnabled = true;
bool public isAirdropCompleted = false;
event MinTokensBeforeSwapUpdated(uint256 minTokensBeforeSwap);
event SwapAndLiquifyEnabledUpdated(bool enabled);
event SwapAndSendDevEnabledUpdated(bool enabled);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiqudity
);
modifier lockTheSwap() {
inSwapAndLiquify = true;
_;
inSwapAndLiquify = false;
}
modifier lockSendDev() {
inSwapAndSendDev = true;
_;
inSwapAndSendDev = false;
}
constructor() {
//manually set owner balance so owner can provide liquidity before conducting the airdrop. Value is calculated prior to deployment and is the amount of tokens after subtracting airdrop allocations
_tOwned[msg.sender] = 211032861142177000000000000000000;
_tOwned[address(this)]=_tTotal.sub(_tOwned[msg.sender]);
setRouterAddress(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D); //Uniswap V2 router
_isExcludedFromFee[owner()] = true;
_isExcludedFromFee[address(this)] = true;
}
/// @notice Returns the token's name
function name() public view returns (string memory) {
return _name;
}
/// @notice Returns the token's symbol
function symbol() public view returns (string memory) {
return _symbol;
}
/// @notice Returns the token's decimal precision
function decimals() public view override returns (uint8) {
return _decimals;
}
/// @notice Returns the token's total supply
function totalSupply() public view override returns (uint256) {
return _tTotal;
}
/// @notice Returns the token balance of an address
/// @param account address to query
function balanceOf(address account) public view override returns (uint256) {
return _tOwned[account];
}
/// @notice Transfers tokens while implementing customized tax logic
/// @param _to Recipient address
/// @param _value amount of tokens to transfer
function transfer(address _to, uint256 _value)
public
override
returns (bool)
{
require(_value > 0, "Value Too Low");
require(transferBlacklist[msg.sender] == false, "Sender Blacklisted");
require(transferBlacklist[_to] == false, "Recipient Blacklisted");
require(_tOwned[msg.sender] >= _value, "Balance Too Low");
if (
_isExcludedFromFee[msg.sender] == true ||
_isExcludedFromFee[_to] == true
) {
_tOwned[msg.sender] = _tOwned[msg.sender].sub(_value);
_tOwned[_to] = _tOwned[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
} else if (
taxOnlyDex == true &&
(_msgSender() == uniswapV2Pair || _to == uniswapV2Pair)
) {
//Taxes direct transfers to/from LP pair
_transfer(_msgSender(), _to, _value);
} else {
//transfers between regular wallets are not taxed
_tOwned[msg.sender] = _tOwned[msg.sender].sub(_value);
_tOwned[_to] = _tOwned[_to].add(_value);
emit Transfer(msg.sender, _to, _value);
}
return true;
}
/// @notice Checks how many tokens an address can transfer on behalf of another address
/// @param owner address that owns the tokens
/// @param spender address that is allowed to transfer tokens on behalf of owner
function allowance(address owner, address spender)
public
view
override
returns (uint256)
{
return _allowances[owner][spender];
}
/// @notice Sets the amount of tokens an address can transfer on behalf of another address
/// @param _spender address that is allowed to transfer tokens on behalf of the function caller
/// @param _value amount of tokens that _spender is allowed to transfer
function approve(address _spender, uint256 _value)
public
override
returns (bool)
{
_approve(_msgSender(), _spender, _value);
return true;
}
/// @notice Allows caller to transfer tokens on behalf of an address
/// @param _from Address that sends the tokens
/// @param _to Address that receives the tokens
/// @param _value amount of tokens to transfer
function transferFrom(
address _from,
address _to,
uint256 _value
) public override returns (bool) {
require(_value > 0, "Value Too Low");
require(transferBlacklist[_from] == false, "Sender Blacklisted");
require(transferBlacklist[_to] == false, "Recipient Blacklisted");
require(_value <= _tOwned[_from], "Balance Too Low");
require(_value <= _allowances[_from][msg.sender], "Approval Too Low");
if (
_isExcludedFromFee[_from] == true || _isExcludedFromFee[_to] == true
) {
_tOwned[_from] = _tOwned[_from].sub(_value);
_tOwned[_to] = _tOwned[_to].add(_value);
_allowances[_from][msg.sender] = _allowances[_from][msg.sender].sub(
_value
);
emit Transfer(_from, _to, _value);
} else {
_transfer(_from, _to, _value);
_approve(
_from,
_msgSender(),
_allowances[_from][_msgSender()].sub(
_value,
"ERC20: transfer amount exceeds allowance"
)
);
}
return true;
}
/// @notice Conducts airdrop to an array of users
/// @param supportersAddresses Array of users
/// @param supportersAmounts Airdrop amount corresponding to each user
function conductAirdrop(address[] memory supportersAddresses, uint256[] memory supportersAmounts) public onlyOwner{
require(isAirdropCompleted==false, "Airdrop Already Finished");
isAirdropCompleted=true;
for (uint8 i = 0; i < supportersAddresses.length; i++) {
_tOwned[address(this)]=_tOwned[address(this)].sub(supportersAmounts[i]);
_tOwned[supportersAddresses[i]] = _tOwned[supportersAddresses[i]].add(supportersAmounts[i]);
emit Transfer(address(this), supportersAddresses[i], supportersAmounts[i]);
}
}
/// @notice This function is used in case you want to migrate liquidity to another DEX, which is why using Uniswap V2 is ideal, b/c most other Dexes are forks of V2
/// @param newRouter DEX router address
function setRouterAddress(address newRouter) public onlyOwner {
IUniswapV2Router02 _newPancakeRouter = IUniswapV2Router02(newRouter);
uniswapV2Pair = IUniswapV2Factory(_newPancakeRouter.factory())
.createPair(address(this), _newPancakeRouter.WETH());
uniswapV2Router = _newPancakeRouter;
}
/// @notice Exclude an address from being charged a tax on token transfer
/// @param account Address to exclude
function excludeFromFee(address account) public onlyOwner {
_isExcludedFromFee[account] = true;
}
/// @notice Include an address to be charged a tax on token transfer
/// @param account Address to include
function includeInFee(address account) public onlyOwner {
_isExcludedFromFee[account] = false;
}
/// @notice Blacklist/unblacklist an address from being able to send and receive tokens
/// @param account Account to modify setting for
/// @param yesOrNo Blacklist or unblacklist
function setBlacklist(address account, bool yesOrNo) public onlyOwner {
transferBlacklist[account] = yesOrNo;
}
/// @notice Set the tax rate for the Dev tax, which is sent to the Dev Wallet
function setTaxFeePercent(uint256 taxFee) external onlyOwner {
require (taxFee + _liquidityFee + _additionalTax <=25, "25 is Max Tax Threshold");
_taxFee = taxFee;
}
/// @notice Set the tax rate for the liquidity tax, which is used to provide liquidity for the token
function setLiquidityFeePercent(uint256 liquidityFee) external onlyOwner {
require (_taxFee + liquidityFee + _additionalTax <=25, "25 is Max Tax Threshold");
_liquidityFee = liquidityFee;
}
/// @notice Set the tax rate for the additional tax, which is charged when the token transfer amount is above a certain threshold
function setAdditionalTax(uint256 additionalTax) external onlyOwner {
require (_taxFee + _liquidityFee + additionalTax <=25, "25 is Max Tax Threshold");
_additionalTax = additionalTax;
}
/// @notice Set the token amount, above which the _additionalTax will be charged on transfers
function setAdditionalTaxThreshold(uint256 additionalTaxThreshold)
external
onlyOwner
{
_additionalTaxThreshold = additionalTaxThreshold;
}
/// @notice Set the max transaction amount, in basis points relative to the total supply, above which token transfers will be rejected
function setMaxTxPercent(uint256 maxTxPercent) external onlyOwner {
uint newMaxTxAmount = _tTotal.mul(maxTxPercent).div(10000);
require(newMaxTxAmount > _tTotal.mul(5).div(10000), "MaxTxAmount Tow Low");
_maxTxAmount = newMaxTxAmount;
}
/// @notice Enable or disable the process of providing liquidity with the tokens collected by the liquidity tax
function setSwapAndLiquifyEnabled(bool _enabled) public onlyOwner {
swapAndLiquifyEnabled = _enabled;
emit SwapAndLiquifyEnabledUpdated(_enabled);
}
/// @notice Enable or disable the process of converting the tokens collected by the Dev tax and sending it to the Dev wallet
function setSwapAndSendDevEnabled(bool _enabled) public onlyOwner {
swapAndSendDevEnabled = _enabled;
emit SwapAndSendDevEnabledUpdated(_enabled);
}
/// @notice To receive ETH from uniswapV2Router when swapping
receive() external payable {}
/// @notice Calculates tax values
/// @param tAmount Amount to transfer before taxes
/// @param from address to transfer from
/// @return tTransferAmount total token amount to transfer after subtracting the tax fees
/// @return tFee total amount that goes towards the Devs
/// @return tLiquidity total ammount that goes towards providing liquidity
function _getTValues(uint256 tAmount, address from)
private
view
returns (
uint256,
uint256,
uint256
)
{
uint256 tFee = calculateTaxFee(tAmount, from);
uint256 tLiquidity = calculateLiquidityFee(tAmount);
uint256 tTransferAmount = tAmount.sub(tFee).sub(tLiquidity);
return (tTransferAmount, tFee, tLiquidity);
}
/// @notice Calculates Dev tax amount
/// @param _amount Amount to transfer before taxes
/// @param _from address to transfer from
function calculateTaxFee(uint256 _amount, address _from)
private
view
returns (uint256)
{
if (_amount > _additionalTaxThreshold && _from != uniswapV2Pair) {
// additional tax on SELL orders if amount is > threshold
uint256 higherTax = _taxFee.add(_additionalTax);
return _amount.mul(higherTax).div(10**2);
} else {
return _amount.mul(_taxFee).div(10**2);
}
}
/// @notice Calculates liquidity tax amount
/// @param _amount Amount to transfer before taxes
function calculateLiquidityFee(uint256 _amount)
private
view
returns (uint256)
{
return _amount.mul(_liquidityFee).div(10**2);
}
/// @notice Checks if an address is excluded from being taxed on token transfers
/// @param account Account to check
function isExcludedFromFee(address account) public view returns (bool) {
return _isExcludedFromFee[account];
}
/// @notice Sets the amount of tokens an address can transfer on behalf of another address
/// @param owner address that owns the tokens
/// @param spender address that is allowed to transfer tokens on behalf of owner
/// @param amount amount of tokens that spender is allowed to transfer
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);
}
/// @notice Internal token transfer logic that takes care of calculating and collecting taxes
/// @param from address that is sending the tokens
/// @param to address that is receiving the tokens
/// @param amount amount of tokens that is being sent
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");
if (from != owner() && to != owner())
require(
amount <= _maxTxAmount,
"Transfer amount exceeds the maxTxAmount."
);
(
uint256 tTransferAmount,
uint256 tFee,
uint256 tLiquidity
) = _getTValues(amount, from);
//add the liquidity fee into the balance of this contract address, b/c will need to use to swap later
_tOwned[address(this)] = _tOwned[address(this)].add(tLiquidity);
taxYetToBeLiquified = taxYetToBeLiquified.add(tLiquidity);
if (taxYetToBeLiquified >= numTokensSellToAddToLiquidity) {
// only liquify if above a certain threshold
// also, don't get caught in a circular liquidity event.
// also, don't swap & liquify if sender is uniswap pair.
if (
!inSwapAndLiquify &&
from != uniswapV2Pair &&
swapAndLiquifyEnabled
) {
//add liquidity
swapAndLiquify(taxYetToBeLiquified);
taxYetToBeLiquified = 0;
}
}
//add the dev fee into the balance of this contract address, b/c will need to use to swap later
_tOwned[address(this)] = _tOwned[address(this)].add(tFee);
taxYetToBeSentToDev = taxYetToBeSentToDev.add(tFee);
if (
taxYetToBeSentToDev >= minimumDevTaxDistributionThreshold
) {
if (
!inSwapAndSendDev &&
from != uniswapV2Pair &&
swapAndSendDevEnabled
) {
//convert to ETH and send to Dev
swapAndSendToDev(taxYetToBeSentToDev);
taxYetToBeSentToDev = 0;
}
}
_tOwned[from] = _tOwned[from].sub(amount);
_tOwned[to] = _tOwned[to].add(tTransferAmount);
emit Transfer(from, to, tTransferAmount);
}
/// @notice Converts tokens into ETH and sends to Dev wallet
/// @param tokenAmount amount of tokens to convert to ETH
function swapAndSendToDev(uint256 tokenAmount) private lockSendDev {
uint256 initialBalance = address(this).balance;
swapTokensForEth(tokenAmount);
uint256 newBalance = address(this).balance.sub(initialBalance);
bool sent = payable(devFeeWallet).send(newBalance);
require(sent, "ETH transfer failed");
}
/// @notice Uses tokens to provide liquidty by first selling half to obtain ETH
/// @param _numTokensSellToAddToLiquidity amount of tokens to use to provide liquidity
function swapAndLiquify(uint256 _numTokensSellToAddToLiquidity)
private
lockTheSwap
{
// split the contract balance into halves
uint256 half = _numTokensSellToAddToLiquidity.div(2);
uint256 otherHalf = _numTokensSellToAddToLiquidity.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); // <- 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);
emit SwapAndLiquify(half, newBalance, otherHalf);
}
/// @notice Converts tokens to ETH via the DEX router
/// @param tokenAmount amount of tokens to convert into ETH
function swapTokensForEth(uint256 tokenAmount) private {
// 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,
address(this),
block.timestamp
);
}
/// @notice Add liquidity for the token via the DEX router
/// @param tokenAmount amount of tokens to use to provide liquidity
/// @param ethAmount amount of tokens to use to provide liquidity
function addLiquidity(uint256 tokenAmount, uint256 ethAmount) private {
// approve token transfer to cover all possible scenarios
_approve(address(this), address(uniswapV2Router), tokenAmount);
// add the liquidity
uniswapV2Router.addLiquidityETH{value: ethAmount}(
address(this),
tokenAmount,
0, // slippage is unavoidable
0, // slippage is unavoidable
owner(),
block.timestamp
);
}
/// @notice Sets the address that the Dev tax is sent to
function setDevWallet(address _devWallet) external onlyOwner {
devFeeWallet = _devWallet;
}
/// @notice Sets whether token transfers associated with trades on a DEX (Uniswap) are taxed
function setTaxOnlyDex(bool _taxOnlyDex) external onlyOwner {
taxOnlyDex = _taxOnlyDex;
}
}