Contract Name:
Retrogression
Contract Source Code:
File 1 of 1 : Retrogression
pragma solidity 0.8.11;
//SPDX-License-Identifier: none
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
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);
}
abstract contract Context {
function _msgSender() internal view virtual returns (address payable) {
return payable(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;
}
}
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public 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() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[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) public virtual override returns (bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public 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) public 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
) public virtual override returns (bool) {
_transfer(sender, recipient, amount);
uint256 currentAllowance = _allowances[sender][_msgSender()];
require(currentAllowance >= amount, "ERC20: transfer amount exceeds allowance");
unchecked {
_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) public 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) public 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 Moves `amount` of tokens from `sender` to `recipient`.
*
* This 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 sender,
address recipient,
uint256 amount
) internal virtual {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(sender, recipient, amount);
uint256 senderBalance = _balances[sender];
require(senderBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[sender] = senderBalance - amount;
}
_balances[recipient] += amount;
emit Transfer(sender, recipient, amount);
_afterTokenTransfer(sender, recipient, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
_balances[account] += amount;
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, 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;
}
_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);
}
/**
* @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 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,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been 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 _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
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;
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");
(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");
(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");
(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");
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResult(success, returndata, errorMessage);
}
/**
* @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal 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
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
}
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
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() {
_setOwner(_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 {
_setOwner(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");
_setOwner(newOwner);
}
function _setOwner(address newOwner) private {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}
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;
}
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 IUniswapV2Pair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint 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 (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint 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 (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
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 (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
library SafeMathInt {
function mul(int256 a, int256 b) internal pure returns (int256) {
require(!(a == - 2**255 && b == -1) && !(b == - 2**255 && a == -1));
int256 c = a * b;
require((b == 0) || (c / b == a));
return c;
}
function div(int256 a, int256 b) internal pure returns (int256) {
require(!(a == - 2**255 && b == -1) && (b > 0));
return a / b;
}
function sub(int256 a, int256 b) internal pure returns (int256) {
require((b >= 0 && a - b <= a) || (b < 0 && a - b > a));
return a - b;
}
function add(int256 a, int256 b) internal pure returns (int256) {
int256 c = a + b;
require((b >= 0 && c >= a) || (b < 0 && c < a));
return c;
}
function toUint256Safe(int256 a) internal pure returns (uint256) {
require(a >= 0);
return uint256(a);
}
}
library SafeMathUint {
function toInt256Safe(uint256 a) internal pure returns (int256) {
int256 b = int256(a);
require(b >= 0);
return b;
}
}
library SafeMath {
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b > a) return (false, 0);
return (true, a - b);
}
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a / b);
}
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
if (b == 0) return (false, 0);
return (true, a % b);
}
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
require(b <= a, "SafeMath: subtraction overflow");
return a - b;
}
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) return 0;
uint256 c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: division by zero");
return a / b;
}
function mod(uint256 a, uint256 b) internal pure returns (uint256) {
require(b > 0, "SafeMath: modulo by zero");
return a % b;
}
function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b <= a, errorMessage);
return a - b;
}
function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a / b;
}
function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
require(b > 0, errorMessage);
return a % b;
}
}
contract Retrogression is Context, ERC20, Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
using Address for address;
IUniswapV2Router02 public uniswapV2Router;
address public immutable uniswapV2Pair;
bool private trading;
bool private starting;
bool private alreadyStarted;
bool private stakingAllowed;
bool private lpAdded;
bool public sendTokens;
bool public swapping;
address public productionWallet;
address public marketingWallet;
address public filmCribWallet;
uint256 public swapTokensAtAmount;
uint256 private _buyProductionFee;
uint256 private _buyMarketingFee;
uint256 private _buyFilmCribFee;
uint256 private _sellProductionFee;
uint256 private _sellMarketingFee;
uint256 private _sellFilmCribFee;
uint256 private blacklistFee;
uint256 public _maxWallet;
uint256 public _maxBuy;
uint256 public _maxSell;
uint256 public totalBuyFees;
uint256 public totalSellFees;
mapping (address => bool) private _isExcludedFromFees;
mapping (address => bool) public automatedMarketMakerPairs;
mapping (address => bool) public _isBlacklisted;
mapping (address => bool) public _canAddLiquidity;
event UpdateUniswapV2Router(address indexed newAddress, address indexed oldAddress);
event ExcludeFromFees(address indexed account, bool isExcluded);
event blacklist(address indexed account, bool isBlacklisted);
event addLiquidityAddress(address indexed account, bool enabled);
event ExcludeMultipleAccountsFromFees(address[] accounts, bool isExcluded);
event tradingUpdated(bool _enabled);
event burningUpdated(bool _enabled);
event allowStaking(bool _enabled);
event sendTokensUpdated(bool _enabled);
event SetAutomatedMarketMakerPair(address indexed pair, bool indexed value);
event WalletUpdated(address indexed newMarketingWallet, address indexed oldMarketingWallet);
event UpdateSwapAmount(uint256 amount, uint256 swapTokensAtAmount);
event UpdateMaxWallet(uint256 newMaxWallet, uint256 _maxWallet);
event UpdateMaxBuySell(
uint256 newMaxBuy,
uint256 _maxBuy,
uint256 newMaxSell,
uint256 _maxSell
);
event UpdateBuyFees(
uint256 newBuyProductionFee,
uint256 _buyProductionFee,
uint256 newBuyMarketingFee,
uint256 _buyMarketingFee,
uint256 newBuyFilmCribFee,
uint256 _buyFilmCribFee
);
event UpdateSellFees(
uint256 newSellProductionFee,
uint256 _sellProductionFee,
uint256 newSellMarketingFee,
uint256 _sellMarketingFee,
uint256 newSellFilmCribFee,
uint256 _sellFilmCribFee
);
event SwapAndLiquify(
uint256 tokensSwapped,
uint256 ethReceived,
uint256 tokensIntoLiquidity
);
constructor() ERC20 ("Retrogression", "RTGN") {
_buyProductionFee = 11;
_buyMarketingFee = 2;
_buyFilmCribFee = 1;
_sellProductionFee = 11;
_sellMarketingFee = 2;
_sellFilmCribFee = 1;
blacklistFee = 99;
alreadyStarted = false;
stakingAllowed = false;
trading = false;
lpAdded = false;
sendTokens = true;
swapTokensAtAmount = 2500000 * (10**18);
_maxWallet = 5000000 * (10**18);
_maxBuy = 2500000 * (10**18);
_maxSell = 2500000 * (10**18);
totalBuyFees = _buyProductionFee.add(_buyMarketingFee).add(_buyFilmCribFee);
totalSellFees = _sellProductionFee.add(_sellMarketingFee).add(_sellFilmCribFee);
productionWallet = address(payable(0x1D80A03B5b7E13cc785547149bfa14ebF8D3Dd4C));
marketingWallet = address(payable(0x6B1d1e793cCF87aDd7D8Ac44e0f26c2088088bBa));
filmCribWallet = address(payable(0xA381A36f084c5C8082a48f7F4596dC0a6FE0AC18));
IUniswapV2Router02 _uniswapV2Router = IUniswapV2Router02(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
//0x9Ac64Cc6e4415144C455BD8E4837Fea55603e5c3 Testnet
//0x10ED43C718714eb63d5aA57B78B54704E256024E BSC Mainnet
//0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D Ropsten
//0xCDe540d7eAFE93aC5fE6233Bee57E1270D3E330F BakerySwap
// Create a uniswap pair for this new token
address _uniswapV2Pair = IUniswapV2Factory(_uniswapV2Router.factory())
.createPair(address(this), _uniswapV2Router.WETH());
uniswapV2Router = _uniswapV2Router;
uniswapV2Pair = _uniswapV2Pair;
_setAutomatedMarketMakerPair(_uniswapV2Pair, true);
// exclude from paying fees
excludeFromFees(owner(), true);
excludeFromFees(marketingWallet, true);
excludeFromFees(productionWallet, true);
excludeFromFees(address(this), true);
/*
_mint is an internal function in ERC20.sol that is only called here,
and CANNOT be called ever again
*/
_mint(owner(), 1000000000 * (10**18));
}
receive() external payable {
}
function updateSwapAmount(uint256 amount) public onlyOwner {
swapTokensAtAmount = amount * (10**18);
emit UpdateSwapAmount(amount, swapTokensAtAmount);
}
function updateUniswapV2Router(address newAddress) public onlyOwner {
require(newAddress != address(uniswapV2Router), "Retrogression: The router already has that address");
emit UpdateUniswapV2Router(newAddress, address(uniswapV2Router));
uniswapV2Router = IUniswapV2Router02(newAddress);
}
function excludeFromFees(address account, bool excluded) public onlyOwner {
require(_isExcludedFromFees[account] != excluded, "Retrogression: Account is already the value of 'excluded'");
_isExcludedFromFees[account] = excluded;
emit ExcludeFromFees(account, excluded);
}
function addToBlacklist(address account, bool isBlacklisted) public onlyOwner {
require(_isBlacklisted[account] != isBlacklisted, "Retrogression: Account is already the value of 'elon'");
_isBlacklisted[account] = isBlacklisted;
emit blacklist(account, isBlacklisted);
}
function setAutomatedMarketMakerPair(address pair, bool value) public onlyOwner {
require(pair != uniswapV2Pair, "Retrogression: The Uniswap pair cannot be removed from automatedMarketMakerPairs");
_setAutomatedMarketMakerPair(pair, value);
}
function _setAutomatedMarketMakerPair(address pair, bool value) private {
require(automatedMarketMakerPairs[pair] != value, "Retrogression: Automated market maker pair is already set to that value");
automatedMarketMakerPairs[pair] = value;
emit SetAutomatedMarketMakerPair(pair, value);
}
function updateMarketingWallet(address newMarketingWallet) public onlyOwner {
require(newMarketingWallet != address(0), "ERC20: transfer to the zero address");
require(newMarketingWallet != marketingWallet, "Retrogression: The marketing wallet is already this address");
excludeFromFees(newMarketingWallet, true);
emit WalletUpdated(newMarketingWallet, marketingWallet);
marketingWallet = newMarketingWallet;
}
function updateProductionWallet(address newProductionWallet) public onlyOwner {
require(newProductionWallet != address(0), "ERC20: transfer to the zero address");
require(newProductionWallet != productionWallet, "Retrogression: The marketing wallet is already this address");
excludeFromFees(newProductionWallet, true);
emit WalletUpdated(newProductionWallet, productionWallet);
productionWallet = newProductionWallet;
}
function updateFilmCribWallet(address newFilmCribWallet) public onlyOwner {
require(newFilmCribWallet != address(0), "ERC20: transfer to the zero address");
require(newFilmCribWallet != filmCribWallet, "Retrogression: The film crib wallet is already this address");
excludeFromFees(newFilmCribWallet, true);
emit WalletUpdated(newFilmCribWallet, filmCribWallet);
filmCribWallet = newFilmCribWallet;
}
function isExcludedFromFees(address account) public view returns(bool) {
return _isExcludedFromFees[account];
}
function allowStakingAddress(bool enabled) public onlyOwner {
stakingAllowed = enabled;
emit allowStaking(enabled);
}
function SendTokensToFilmCrib(bool enabled) public onlyOwner {
sendTokens = enabled;
emit sendTokensUpdated(enabled);
}
function _transfer(
address from,
address to,
uint256 amount
) internal override {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
if (to == uniswapV2Pair && !trading) {
if (!stakingAllowed) {
require(_isExcludedFromFees[from] || _isExcludedFromFees[to], "You do not have permission to add liquidity");
}
}
if (from != owner() && to != owner() && to != address(0) && to != address(0xdead) && to != uniswapV2Pair && !_isExcludedFromFees[to] && !_isExcludedFromFees[from])
{
require(trading == true, "Trading is not yet enabled");
require(amount <= _maxBuy, "Transfer amount exceeds the maxTxAmount.");
uint256 contractBalanceRecipient = balanceOf(to);
require(contractBalanceRecipient + amount <= _maxWallet, "Exceeds maximum wallet token amount.");
}
if(amount == 0) {
super._transfer(from, to, 0);
return;
}
if(!swapping && automatedMarketMakerPairs[to] && from != address(uniswapV2Router) && from != owner() && to != owner() && !_isExcludedFromFees[to] && !_isExcludedFromFees[from])
{
require(trading == true, "Trading is not yet enabled");
require(amount <= _maxSell, "Sell transfer amount exceeds the maxSellTransactionAmount.");
}
uint256 contractTokenBalance = balanceOf(address(this));
bool canSwap = contractTokenBalance >= swapTokensAtAmount;
if(canSwap && !swapping && automatedMarketMakerPairs[to] && !_isExcludedFromFees[to] && !_isExcludedFromFees[from]) {
contractTokenBalance = swapTokensAtAmount;
uint256 swapTokens;
uint256 swapTokensAmount;
swapping = true;
if (totalSellFees > 0 && !sendTokens) {
swapTokens = contractTokenBalance;
swapTokensForEth(swapTokens);
swapTokensAmount = totalSellFees;
uint256 filmCribAmount = address(this).balance.mul(_sellFilmCribFee).div(swapTokensAmount);
(bool success, ) = filmCribWallet.call{value: filmCribAmount}("");
require(success, "Failed to send film crib amount");
}
else if (totalSellFees > 0 && sendTokens) {
swapTokens = contractTokenBalance;
uint256 filmCribAmount = swapTokens.mul(_sellFilmCribFee).div(100);
swapTokens = swapTokens.sub(filmCribAmount);
swapTokensAmount = totalSellFees.sub(_sellFilmCribFee);
swapTokensForEth(swapTokens);
super._transfer(address(this), filmCribWallet, filmCribAmount);
}
if (_sellProductionFee > 0) {
uint256 productionAmount = address(this).balance.mul(_sellProductionFee).div(swapTokensAmount);
(bool success, ) = productionWallet.call{value: productionAmount}("");
require(success, "Failed to send production amount");
}
if (_sellMarketingFee > 0) {
uint256 marketingAmount = address(this).balance;
(bool success, ) = marketingWallet.call{value: marketingAmount}("");
require(success, "Failed to send marketing amount");
}
swapping = false;
}
bool takeFee = !swapping;
// if any account belongs to _isExcludedFromFee account then remove the fee
if(_isExcludedFromFees[from] || _isExcludedFromFees[to]) {
takeFee = false;
super._transfer(from, to, amount);
}
else if(!automatedMarketMakerPairs[to] && !automatedMarketMakerPairs[from] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
takeFee = false;
super._transfer(from, to, amount);
}
if(takeFee) {
uint256 BuyFees = amount.mul(totalBuyFees).div(100);
uint256 SellFees = amount.mul(totalSellFees).div(100);
uint256 BlacklistFee = amount.mul(blacklistFee).div(100);
if(_isBlacklisted[to] && automatedMarketMakerPairs[from]) {
amount = amount.sub(BlacklistFee);
super._transfer(from, address(this), BlacklistFee);
super._transfer(from, to, amount);
}
// if sell
else if(automatedMarketMakerPairs[to] && totalSellFees > 0) {
amount = amount.sub(SellFees);
super._transfer(from, address(this), SellFees);
super._transfer(from, to, amount);
}
// if buy transfer
else if(automatedMarketMakerPairs[from] && totalBuyFees > 0) {
amount = amount.sub(BuyFees);
super._transfer(from, address(this), BuyFees);
super._transfer(from, to, amount);
if(starting && !_isBlacklisted[to] && !_isExcludedFromFees[from] && !_isExcludedFromFees[to]) {
_isBlacklisted[to] = true;
}
}
else {
super._transfer(from, to, amount);
}
}
}
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
);
}
function addLP() external onlyOwner() {
require(!lpAdded, "This project is already launched");
updateBuyFees(0,0,0);
updateSellFees(0,0,0);
trading = false;
updateMaxWallet(1000000000);
updateMaxBuySell((1000000000), (1000000000));
lpAdded = true;
}
function letsGoLive() external onlyOwner() {
updateBuyFees(11,2,1);
updateSellFees(11,2,1);
updateMaxWallet(5000000);
updateMaxBuySell(2500000, 2500000);
starting = false;
if(!trading) {
trading = true;
}
if(!stakingAllowed) {
stakingAllowed = true;
}
}
function letsBegin() external onlyOwner() {
require(!alreadyStarted, "This project is already launched");
_buyMarketingFee = 33;
_buyProductionFee = 33;
_buyFilmCribFee = 33;
updateSellFees(11,2,1);
updateMaxWallet(5000000);
updateMaxBuySell(2500000, 2500000);
trading = true;
starting = true;
alreadyStarted = true;
stakingAllowed = true;
}
function updateBuyFees(uint256 newBuyProductionFee, uint256 newBuyMarketingFee, uint256 newBuyFilmCribFee) public onlyOwner {
require(newBuyProductionFee.add(newBuyMarketingFee).add(newBuyFilmCribFee) <= 25, "Total buy taxes cannot exceed 25%");
_buyProductionFee = newBuyProductionFee;
_buyMarketingFee = newBuyMarketingFee;
_buyFilmCribFee = newBuyFilmCribFee;
totalFees();
emit UpdateBuyFees(newBuyProductionFee, _buyProductionFee, newBuyMarketingFee, _buyMarketingFee, newBuyFilmCribFee, _buyFilmCribFee);
}
function updateSellFees(uint256 newSellProductionFee, uint256 newSellMarketingFee, uint256 newSellFilmCribFee) public onlyOwner {
require(newSellProductionFee.add(newSellMarketingFee).add(newSellFilmCribFee) <= 25, "Total sell taxes cannot exceed 25%");
_sellProductionFee = newSellProductionFee;
_sellMarketingFee = newSellMarketingFee;
_sellFilmCribFee = newSellFilmCribFee;
totalFees();
emit UpdateSellFees(newSellProductionFee, _sellProductionFee, newSellMarketingFee, _sellMarketingFee, newSellFilmCribFee, _sellFilmCribFee);
}
function updateMaxWallet(uint256 newMaxWallet) public onlyOwner {
require(newMaxWallet >= 5000000, "Cannot lower max wallet below .5% of total supply");
_maxWallet = newMaxWallet * (10**18);
emit UpdateMaxWallet(newMaxWallet, _maxWallet);
}
function updateMaxBuySell(uint256 newMaxBuy, uint256 newMaxSell) public onlyOwner {
require(newMaxBuy >= 2500000, "Cannot lower max buy below .25% of total supply");
require(newMaxSell >= 2500000, "Cannot lower max sell below .25% of total supply");
_maxBuy = newMaxBuy * (10**18);
_maxSell = newMaxSell * (10**18);
emit UpdateMaxBuySell(newMaxBuy, _maxBuy, newMaxSell, _maxSell);
}
function totalFees() private {
totalBuyFees = _buyProductionFee.add(_buyMarketingFee).add(_buyFilmCribFee);
totalSellFees = _sellProductionFee.add(_sellMarketingFee).add(_sellFilmCribFee);
}
function withdrawRemainingETH(address account, uint256 percent) public onlyOwner {
require(percent > 0 && percent <= 100, "Must be a valid percent");
require(account != address(0), "ERC20: transfer to the zero address");
uint256 percentage = percent.div(100);
uint256 balance = address(this).balance.mul(percentage);
(bool success, ) = account.call{value: balance}("");
require(success, "Failed to send withdraw ETH");
}
function withdrawRemainingToken(address account, uint256 amount) public onlyOwner {
require(amount <= balanceOf(address(this)), "Amount cannot exceed tokens in contract");
super._transfer(address(this), account, amount);
}
function withdrawRemainingERC20Token(address token, address account) public onlyOwner {
ERC20 Token = ERC20(token);
uint256 balance = Token.balanceOf(address(this));
Token.transfer(account, balance);
}
function burnTokenManual(uint256 amount) public onlyOwner {
require(amount <= balanceOf(address(this)), "Amount cannot exceed tokens in contract");
super._transfer(address(this), 0x000000000000000000000000000000000000dEaD, amount * 10**18);
}
}