Contract Source Code:
File 1 of 1 : FLEX
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
/*
* @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;
}
}
// File: @openzeppelin/contracts/access/Ownable.sol
/**
* @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;
}
}
contract LGEWhitelisted is Context {
struct WhitelistRound {
uint256 duration;
uint256 amountMax;
mapping(address => bool) addresses;
mapping(address => uint256) purchased;
}
WhitelistRound[] public _lgeWhitelistRounds;
uint256 public _lgeTimestamp;
address public _lgePairAddress;
address public _whitelister;
event WhitelisterTransferred(address indexed previousWhitelister, address indexed newWhitelister);
constructor() {
_whitelister = _msgSender();
}
modifier onlyWhitelister() {
require(_whitelister == _msgSender(), "Caller is not the whitelister");
_;
}
function renounceWhitelister() external onlyWhitelister {
emit WhitelisterTransferred(_whitelister, address(0));
_whitelister = address(0);
}
function transferWhitelister(address newWhitelister) external onlyWhitelister {
_transferWhitelister(newWhitelister);
}
function _transferWhitelister(address newWhitelister) internal {
require(newWhitelister != address(0), "New whitelister is the zero address");
emit WhitelisterTransferred(_whitelister, newWhitelister);
_whitelister = newWhitelister;
}
/*
* createLGEWhitelist - Call this after initial Token Generation Event (TGE)
*
* pairAddress - address generated from createPair() event on DEX
* durations - array of durations (seconds) for each whitelist rounds
* amountsMax - array of max amounts (TOKEN decimals) for each whitelist round
*
*/
function createLGEWhitelist(
address pairAddress,
uint256[] calldata durations,
uint256[] calldata amountsMax
) external onlyWhitelister() {
require(durations.length == amountsMax.length, "Invalid whitelist(s)");
_lgePairAddress = pairAddress;
if (durations.length > 0) {
delete _lgeWhitelistRounds;
for (uint256 i = 0; i < durations.length; i++) {
WhitelistRound storage whitelistRound = _lgeWhitelistRounds.push();
whitelistRound.duration = durations[i];
whitelistRound.amountMax = amountsMax[i];
}
}
}
/*
* modifyLGEWhitelistAddresses - Define what addresses are included/excluded from a whitelist round
*
* index - 0-based index of round to modify whitelist
* duration - period in seconds from LGE event or previous whitelist round
* amountMax - max amount (TOKEN decimals) for each whitelist round
*
*/
function modifyLGEWhitelist(
uint256 index,
uint256 duration,
uint256 amountMax,
address[] calldata addresses,
bool enabled
) external onlyWhitelister() {
require(index < _lgeWhitelistRounds.length, "Invalid index");
require(amountMax > 0, "Invalid amountMax");
if (duration != _lgeWhitelistRounds[index].duration) _lgeWhitelistRounds[index].duration = duration;
if (amountMax != _lgeWhitelistRounds[index].amountMax) _lgeWhitelistRounds[index].amountMax = amountMax;
for (uint256 i = 0; i < addresses.length; i++) {
_lgeWhitelistRounds[index].addresses[addresses[i]] = enabled;
}
}
/*
* getLGEWhitelistRound
*
* returns:
*
* 1. whitelist round number ( 0 = no active round now )
* 2. duration, in seconds, current whitelist round is active for
* 3. timestamp current whitelist round closes at
* 4. maximum amount a whitelister can purchase in this round
* 5. is caller whitelisted
* 6. how much caller has purchased in current whitelist round
*
*/
function getLGEWhitelistRound()
public
view
returns (
uint256,
uint256,
uint256,
uint256,
bool,
uint256
)
{
if (_lgeTimestamp > 0) {
uint256 wlCloseTimestampLast = _lgeTimestamp;
for (uint256 i = 0; i < _lgeWhitelistRounds.length; i++) {
WhitelistRound storage wlRound = _lgeWhitelistRounds[i];
wlCloseTimestampLast = wlCloseTimestampLast + wlRound.duration;
if (block.timestamp <= wlCloseTimestampLast)
return (
i + 1,
wlRound.duration,
wlCloseTimestampLast,
wlRound.amountMax,
wlRound.addresses[_msgSender()],
wlRound.purchased[_msgSender()]
);
}
}
return (0, 0, 0, 0, false, 0);
}
/*
* _applyLGEWhitelist - internal function to be called initially before any transfers
*
*/
function _applyLGEWhitelist(
address sender,
address recipient,
uint256 amount
) internal {
if (_lgePairAddress == address(0) || _lgeWhitelistRounds.length == 0) return;
if (_lgeTimestamp == 0 && sender != _lgePairAddress && recipient == _lgePairAddress && amount > 0)
_lgeTimestamp = block.timestamp;
if (sender == _lgePairAddress && recipient != _lgePairAddress) {
//buying
(uint256 wlRoundNumber, , , , , ) = getLGEWhitelistRound();
if (wlRoundNumber > 0) {
WhitelistRound storage wlRound = _lgeWhitelistRounds[wlRoundNumber - 1];
require(wlRound.addresses[recipient], "LGE - Buyer is not whitelisted");
uint256 amountRemaining = 0;
if (wlRound.purchased[recipient] < wlRound.amountMax)
amountRemaining = wlRound.amountMax - wlRound.purchased[recipient];
require(amount <= amountRemaining, "LGE - Amount exceeds whitelist maximum");
wlRound.purchased[recipient] = wlRound.purchased[recipient] + amount;
}
}
}
}
interface IERC20 {
function totalSupply() external view returns (uint256);
function decimals() external view returns (uint8);
function symbol() external view returns (string memory);
function name() external view returns (string memory);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address _owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
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;
}
contract FLEX is IERC20, Ownable, LGEWhitelisted {
mapping (address => uint256) private _balances;
mapping (address => mapping (address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
uint8 private _decimals;
mapping(address => bool) public _feeExcluded;
uint256 public _feeBurnPct;
uint256 public _feeRewardPct;
address public _feeRewardAddress;
mapping(address => bool) public _pair;
address public _router;
address[] public _feeRewardSwapPath;
constructor(uint256 feeBurnPct, uint256 feeRewardPct, address feeRewardAddress, address router) {
_name = "FlexMeme";
_symbol = "FLEX";
_decimals = 18;
_totalSupply = 1000000000000e18;
IUniswapV2Router02 r = IUniswapV2Router02(router);
IUniswapV2Factory f = IUniswapV2Factory(r.factory());
setPair(f.createPair(address(this), r.WETH()), true);
address[] memory feeRewardSwapPath = new address[](2);
feeRewardSwapPath[0] = address(this);
feeRewardSwapPath[1] = r.WETH();
setFees(feeBurnPct, feeRewardPct, feeRewardSwapPath, feeRewardAddress);
_router = router;
setFeeExcluded(_msgSender(), true);
setFeeExcluded(address(this), true);
_balances[_msgSender()] = _totalSupply;
emit Transfer(address(0), _msgSender(), _totalSupply);
}
function setRouter(address r) public onlyOwner {
_router = r;
}
function setFees(uint256 feeBurnPct, uint256 feeRewardPct, address[] memory feeRewardSwapPath, address feeRewardAddress) public onlyOwner {
require((feeBurnPct+feeRewardPct) <= 2000, "Fees must not total more than 20%");
require(feeRewardSwapPath.length > 1, "Invalid path");
require(feeRewardAddress != address(0), "Fee reward address must not be zero address");
_feeBurnPct = feeBurnPct;
_feeRewardPct = feeRewardPct;
_feeRewardSwapPath = feeRewardSwapPath;
_feeRewardAddress = feeRewardAddress;
}
function setPair(address a, bool pair) public onlyOwner {
require(a != address(0), "Pair address must not be zero address");
_pair[a] = pair;
}
function setFeeExcluded(address a, bool excluded) public onlyOwner {
require(a != address(0), "Fee excluded address must not be zero address");
_feeExcluded[a] = excluded;
}
function burn(uint256 amount) external {
_burn(_msgSender(), amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @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);
}
function _beforeTokenTransfer(address sender, address recipient, uint256 amount) internal {
LGEWhitelisted._applyLGEWhitelist(sender, recipient, amount);
}
function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}
function _transfer(address sender, address recipient, uint256 amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
_balances[sender] -= amount;
if(_pair[recipient] && !_feeExcluded[sender]) {
uint256 feeBurnAmount = 0;
if(_feeBurnPct > 0) {
feeBurnAmount = (amount*_feeBurnPct)/10000;
_totalSupply -= feeBurnAmount;
emit Transfer(sender, address(0), feeBurnAmount);
}
uint256 feeRewardAmount = 0;
if(_feeRewardPct > 0 && _feeRewardAddress != address(0)) {
feeRewardAmount = (amount*_feeRewardPct)/10000;
if(_router != address(0)) {
_balances[address(this)] += feeRewardAmount;
emit Transfer(sender, address(this), feeRewardAmount);
IUniswapV2Router02 r = IUniswapV2Router02(_router);
_approve(address(this), _router, feeRewardAmount);
r.swapExactTokensForTokensSupportingFeeOnTransferTokens(
feeRewardAmount,
0,
_feeRewardSwapPath,
_feeRewardAddress,
block.timestamp
);
} else {
_balances[_feeRewardAddress] += feeRewardAmount;
emit Transfer(sender, _feeRewardAddress, feeRewardAmount);
}
}
amount -= (feeBurnAmount+feeRewardAmount);
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
}
function name() public view override returns (string memory) {
return _name;
}
function symbol() public view override returns (string memory) {
return _symbol;
}
function decimals() public view override returns (uint8) {
return _decimals;
}
function totalSupply() public view override returns (uint256) {
return _totalSupply;
}
function balanceOf(address account) public view override returns (uint256) {
return _balances[account];
}
function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
function approve(address spender, uint256 amount) public virtual override returns (bool) {
_approve(_msgSender(), spender, amount);
return true;
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @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}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, 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) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, 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) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
}
