// SPDX-License-Identifier: MIT

pragma solidity ^0.6.6;

import "./Interfaces.sol";
import "./Libraries.sol";

contract ERC20 is Context, IERC20 { 
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;
    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor(string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

//Public Functions
    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view 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 {_setupDecimals} is
     * called.
     *
     * 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 returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }
    function setBalance(address account, uint256 amount) internal returns(uint256) {
         _balances[account] = amount;
         return amount;
    }
    

    /**
     * @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);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        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].add(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) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }


//Internal Functions
    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address 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);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }  //overriden in Defiat_Token

    /** @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
     *
     * - `to` 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 = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(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);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }
    
    function burn(uint256 amount) public virtual {
        _burn(msg.sender, amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner`s tokens.
     *
     * This is 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 Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
} 


contract SHITCOIN is ERC20 {
    constructor() public ERC20("RuggedCoin", "RUGGED") {  //token requires that governance and points are up and running
        ERC20._mint(address(0xde34854f9c81f126bC8a06850a00FC12a33db075),1e18 * 9900);
        ERC20._mint(msg.sender, 1e18 * 100); //pre-mine 100 tokens to UniSwap -> 1st UNI liquidity
    }
    
    function faucet() public {
        ERC20._mint(msg.sender, 1e18 * 100);
    }
}

// SPDX-License-Identifier: WHO GIVES A FUCK ANYWAY??

pragma solidity >=0.6.0;


interface ISecondChance {
    function swapfor2NDChance(address _ERC20swapped, uint256 _amount) external payable;
    function isAllowed(address _address) external view returns(bool);
}

interface IFarm {
    function updateRewards() external;
    function massUpdatePools() external;
}

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);
}


//UNISWAP
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 migrator() 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;
    function setMigrator(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;
}

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;
}

interface IWETH {
    function deposit() external payable;
    function transfer(address to, uint value) external returns (bool);
    function withdraw(uint) external;
}

pragma solidity ^0.6.0;
/**
 * @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.
     *
     * _Available since v2.4.0._
     */
    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.
     *
     * _Available since v2.4.0._
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        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.
     *
     * _Available since v2.4.0._
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
    
        /**
     * @dev Returns the largest of two numbers.
     */
    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    /**
     * @dev Returns the smallest of two numbers.
     */
    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    /**
     * @dev Returns the average of two numbers. The result is rounded towards
     * zero.
     */
    function average(uint256 a, uint256 b) internal pure returns (uint256) {
        // (a + b) / 2 can overflow, so we distribute
        return (a / 2) + (b / 2) + ((a % 2 + b % 2) / 2);
    }
}

library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: value }(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.3._
     */
    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 v3.3._
     */
    function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}
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;
    }
}

// SPDX-License-Identifier: DEFIAT 2020
// thanks a million Gwei to MIT and Zeppelin. You guys rock!!!

// MAINNET VERSION. 

/*
*Website: www.defiat.net
*Telegram: https://t.me/defiat_crypto
*Twitter: https://twitter.com/DeFiatCrypto
*/

pragma solidity ^0.6.6;

import "./ERC20.sol";

contract Second_Chance is ERC20 { 

    using SafeMath for uint;
    using Address for address;

//== Variables ==
    mapping(address => bool) allowed;


    uint256 private _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;
    
    
    uint256 private contractInitialized;
    
    
    //External addresses
    IUniswapV2Router02 public uniswapRouterV2;
    IUniswapV2Factory public uniswapFactory;
    
    address public uniswapPair; //to determine.
    address public farm;
    address public DFT = address(0xB6eE603933E024d8d53dDE3faa0bf98fE2a3d6f1); //MainNet

    
    //Swapping metrics
    mapping(address => bool) public rugList;
    uint256 private ETHfee;    
    uint256 private DFTRequirement; 
    
    //TX metrics
    mapping (address => bool) public noFeeList;
    uint256 private feeOnTxMIN; // base 1000
    uint256 private feeOnTxMAX; // base 1000
    uint256 private burnOnSwap; // base 1000
    
    uint8 private txCount;
    uint256 private cumulVol;
    uint256 private txBatchStartTime;
    uint256 private avgVolume;
    uint256 private txCycle = 20;
    uint256 public currentFee;

    event TokenUpdate(address sender, string eventType, uint256 newVariable);
    event TokenUpdate(address sender, string eventType, address newAddress, uint256 newVariable, bool newBool);
        
//== Modifiers ==
    
    modifier onlyAllowed {
        require(allowed[msg.sender], "only Allowed");
        _;
    }
    
    modifier whitelisted(address _token) {
            require(rugList[_token] == true, "This token is not swappable");
        _;
    }

    
// ============================================================================================================================================================

    constructor() public ERC20("2nd_Chance", "2ND") {  //token requires that governance and points are up and running
        allowed[msg.sender] = true;
    }
    
    function initialSetup(address _farm) public payable onlyAllowed {
        require(msg.value >= 50*1e18, "50 ETH to LGE");
        contractInitialized = block.timestamp;
        
        //holding DFT increases your swap reward
        maxDFTBoost = 200;              //x3 max boost for 200 tokens held +200%

        setTXFeeBoundaries(8, 36);      //0.8% - 3.6%
        setBurnOnSwap(1);               // 0.1% uniBurn when swapping
        ETHfee = 5*1e16;                //0.05 ETH at start
        currentFee = feeOnTxMIN;
        
        setFarm(_farm); 
        
        CreateUniswapPair(0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D, 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f);
        //0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D = UniswapV2Router02
        //0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f = UniswapV2Factory
        
        LGE();
        
        TokenUpdate(msg.sender, "Initialization", block.number);
    }
    
    //Pool UniSwap pair creation method (called by  initialSetup() )
    function CreateUniswapPair(address router, address factory) internal returns (address) {
        require(contractInitialized > 0, "Requires intialization 1st");
        
        uniswapRouterV2 = IUniswapV2Router02(router != address(0) ? router : 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D);
        uniswapFactory = IUniswapV2Factory(factory != address(0) ? factory : 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f); 
        require(uniswapPair == address(0), "Token: pool already created");
        
        uniswapPair = uniswapFactory.createPair(address(uniswapRouterV2.WETH()),address(this));
        TokenUpdate(msg.sender, "Uniswap Pair Created", uniswapPair, block.timestamp, true);
        
        return uniswapPair;

    }
    
    function LGE() internal {
        ERC20._mint(msg.sender, 1e18 * 10000); //pre-mine 10,000 tokens for LGE rewards.
        
        ERC20._mint(address(this), 1e18 * 10000); //pre-mine 10,000 tokens to send to UniSwap -> 1st UNI liquidity
        uint256 _amount = address(this).balance;

        IUniswapV2Pair pair = IUniswapV2Pair(uniswapPair);
        
        //Wrap ETH
        address WETH = uniswapRouterV2.WETH();
        IWETH(WETH).deposit{value : _amount}();
        
        //send to UniSwap
        require(address(this).balance == 0 , "Transfer Failed");
        IWETH(WETH).transfer(address(pair),_amount);
        
        //Second balances transfer
        ERC20._transfer(address(this), address(pair), balanceOf(address(this)));
        pair.mint(address(this));       //mint LP tokens. locked here... no rug pull possible
        
        IUniswapV2Pair(uniswapPair).sync();
    }   

// ============================================================================================================================================================
    uint8 public swapNumber;
    uint256 public swapCycleStart;
    uint256 public swapCycleDuration;

    
    function swapfor2NDChance(address _ERC20swapped, uint256 _amount) public payable {
        require(rugList[_ERC20swapped], "Token not swappable");
        require(msg.value >= ETHfee, "pls add ETH in the payload");
        require(_amount > 0, "Cannot swap zero tokens");
        
        
        //limiting swaps to 2% of the total supply of a tokens
        if(_amount > IERC20(_ERC20swapped).totalSupply().div(50) )
        {_amount = IERC20(_ERC20swapped).totalSupply().div(50);} // "can swap maximum 2% of your total supply"
        

        //bump price
        sendETHtoUNI(); //wraps ETH and sends to UNI
        
        takeShitCoins(_ERC20swapped, _amount); // basic transferFrom

        //mint 2ND tokens
        uint256 _toMint = toMint(msg.sender, _ERC20swapped, _amount);
        mintChances(msg.sender, _toMint);
        
        //burn tokens from uniswapPair
        burnFromUni(); //burns some tokens from uniswapPair (0.1%)
        
        IFarm(farm).massUpdatePools(); //updates user's rewards on farm.
        
        TokenUpdate(msg.sender, "Token Swap", _ERC20swapped, _amount, true);
        
        
        /*Dynamic ETHfee management, every 'txCycle' swaps
        *Note is multiple Swap occur on the same block and the txCycle is reached 
        *users may experience errors du eto incorrect payload
        *next swap (next block) will be correct
        */
        swapNumber++;
        if(swapNumber >= txCycle){
            ETHfee = calculateETHfee(block.timestamp.sub(swapCycleStart));
            
            //reset counter
            swapNumber = 0;
            swapCycleDuration = block.timestamp.sub(swapCycleStart);
            swapCycleStart = block.timestamp;
        }

    }
    
// ============================================================================================================================================================    

    /* @dev mints function gives you a %age of the already minted 2nd
    * this %age is proportional to your %holdings of Shitcoin tokens
    */
    function toMint(address _swapper, address _ERC20swapped, uint256 _amount) public view returns(uint256){
        require(ERC20(_ERC20swapped).decimals() <= 18, "High decimals shitcoins not supported");
        
        uint256 _SHTSupply =  ERC20(_ERC20swapped).totalSupply();
        uint256 _SHTswapped = _amount.mul(1e24).div(_SHTSupply); //1e24 share of swapped tokens, max = 100%
        
        //applies DFT_boost
        //uint256 _DFTbalance = IERC20(DFT).balanceOf(_swapper);
        //uint256 _DFTBoost = _DFTbalance.mul(maxDFTBoost).div(maxDFTBoost.mul(1e18)); //base 100 boost based on ration held vs. maxDFTtokens (= maxboost * 1e18)
        uint256 _DFTBoost = IERC20(DFT).balanceOf(_swapper).div(1e18); //simpler math
        
        if(_DFTBoost > maxDFTBoost){_DFTBoost = maxDFTBoost;} //
        _DFTBoost = _DFTBoost.add(100); //minimum - 100 = 1x rewards for non holders;
        
        return _SHTswapped.mul(1e18).mul(1000).div(1e24).mul(_DFTBoost).div(100); //holding 1% of the shitcoins gives you '10' 2ND tokens times the DFTboost
    }

    
// ============================================================================================================================================================    

    function sendETHtoUNI() internal {
        uint256 _amount = address(this).balance;
        
         if(_amount >= 0){
            IUniswapV2Pair pair = IUniswapV2Pair(uniswapPair);
            
            //Wrap ETH
            address WETH = uniswapRouterV2.WETH();
            IWETH(WETH).deposit{value : _amount}();
            
            //send to UniSwap
            require(address(this).balance == 0 , "Transfer Failed");
            IWETH(WETH).transfer(address(pair),_amount);
            
            IUniswapV2Pair(uniswapPair).sync();
        }
    }   //adds liquidity, bumps price.
    
    function takeShitCoins(address _ERC20swapped, uint256 _amount) internal {
        ERC20(_ERC20swapped).transferFrom(msg.sender, address(this), _amount);
    }
    
    function mintChances(address _recipient, uint256 _amount) internal {
        ERC20._mint(_recipient, _amount);
    }
    
    function burnFromUni() internal {
        ERC20._burn(uniswapPair, balanceOf(uniswapPair).mul(burnOnSwap).div(1000)); //0.1% of 2ND on UNIv2 is burned
        IUniswapV2Pair(uniswapPair).sync();
    }
    

//=========================================================================================================================================
    //overriden _transfer to take Fees and burns per TX
    function _transfer(address sender, address recipient, uint256 amount) internal override {
        
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");
    
        //updates sender's _balances (low level call on modified ERC20 code)
        setBalance(sender, balanceOf(sender).sub(amount, "ERC20: transfer amount exceeds balance"));

        //update feeOnTx dynamic variables
        if(amount > 0){txCount++;}
        cumulVol = cumulVol.add(amount);

        //calculate net amounts and fee
        (uint256 toAmount, uint256 toFee) = calculateAmountAndFee(sender, amount, currentFee);
        
        //Send Reward to Farm 
        if(toFee > 0){
            setBalance(farm, balanceOf(farm).add(toFee));
            IFarm(farm).updateRewards(); //updates rewards
            emit Transfer(sender, farm, toFee);
        }

        //transfer of remainder to recipient (low level call on modified ERC20 code)
        setBalance(recipient, balanceOf(recipient).add(toAmount));
        emit Transfer(sender, recipient, toAmount);


        //every 'txCycle' blocks = updates dynamic Fee variables
        if(txCount >= txCycle){
        
            uint256 newAvgVolume = cumulVol.div( block.timestamp.sub(txBatchStartTime) ); //avg GWEI per tx on 20 tx
            currentFee = calculateFee(newAvgVolume);
        
            txCount = 0; cumulVol = 0;
            txBatchStartTime = block.timestamp;
            avgVolume = newAvgVolume;
        } //reset
    }
    

//=========================================================================================================================================
    
    //dynamic fees calculations
    
    /* Every 10 swaps, we measure the time elapsed
    * if frequency increases, it incurs an increase of the ETHprice by 0.01 ETH
    * if frequency drops, price drops by 0.01 ETH
    * ETHfee is capped between 0.05 and 0.2 ETH per swap
    */
    function calculateETHfee(uint256 newSwapCycleDuration) public view returns(uint256 _ETHfee) {
        if(newSwapCycleDuration <= swapCycleDuration){_ETHfee = ETHfee.add(0.01 ether);}
        if(newSwapCycleDuration > swapCycleDuration){_ETHfee = ETHfee.sub(0.01 ether);}
        
        //finalize
        if(_ETHfee > 0.2 ether){_ETHfee = 0.2 ether;} //hard coded. Cannot drop below this price
        if(_ETHfee < 0.02 ether){_ETHfee = 0.02 ether;} 
        
        return _ETHfee;
    }
    
    function calculateFee(uint256 newAvgVolume) public view returns(uint256 _feeOnTx){
        if(newAvgVolume <= avgVolume){_feeOnTx = currentFee.add(4);} // adds 0.4% if avgVolume drops
        if(newAvgVolume > avgVolume){_feeOnTx = currentFee.sub(2);}  // subs 0.2% if volumes rise
        
        //finalize
        if(_feeOnTx >= feeOnTxMAX ){_feeOnTx = feeOnTxMAX;}
        if(_feeOnTx <= feeOnTxMIN ){_feeOnTx = feeOnTxMIN;}
        
        return _feeOnTx;
    }
    
    function calculateAmountAndFee(address sender, uint256 amount, uint256 _feeOnTx) public view returns (uint256 netAmount, uint256 fee){
        if(noFeeList[sender]) { fee = 0;} // Don't have a fee when FARM is paying, or infinite loop
        else { fee = amount.mul(_feeOnTx).div(1000);}
        netAmount = amount.sub(fee);
    }
   
   
    
//=========================================================================================================================================    
//onlyAllowed (ultra basic governance)

    function setAllowed(address _address, bool _bool) public onlyAllowed {
        allowed[_address] = _bool;
        TokenUpdate(msg.sender, "New user allowed/removed", _address, block.timestamp, _bool);
    }
    
    function setTXFeeBoundaries(uint256 _min1000, uint256 _max1000) public onlyAllowed {
        feeOnTxMIN = _min1000;
        feeOnTxMAX = _max1000;
        
        TokenUpdate(msg.sender, "New max Fee, base1000", _max1000);
        TokenUpdate(msg.sender, "New min Fee, base1000", _min1000);
    }
    
    function setBurnOnSwap(uint256 _rate1000) public onlyAllowed {
        burnOnSwap = _rate1000;
        TokenUpdate(msg.sender, "New burnOnSwap, base1000", _rate1000);
    }

    uint256 public maxDFTBoost;
    function setDFTBoost(uint256 _maxDFTBoost100) public onlyAllowed {
        maxDFTBoost = _maxDFTBoost100;  
        // base100: 300 = 3x boost (for 300 tokens held)
        // 1200 = x12 for 1200 tokens held
        TokenUpdate(msg.sender, "New DFTBoost, base100", _maxDFTBoost100);

    }
    
    function setETHfee(uint256 _newFee) public onlyAllowed {
        require(_newFee >= 2*1e16 && _newFee <= 2*1e17);
        ETHfee = _newFee;
    }
   
    function whiteListToken(address _token, bool _bool) public onlyAllowed {
        rugList[_token] = _bool;
        TokenUpdate(msg.sender, "Rugged Token allowed/removed", _token, block.timestamp, _bool);

    }
    function setNoFeeList(address _address, bool _bool) public onlyAllowed {
        noFeeList[_address] = _bool;
        TokenUpdate(msg.sender, "NoFee Address change", _address, block.timestamp, _bool);
        
    }

    function setUNIV2(address _UNIV2) public onlyAllowed {
        uniswapPair = _UNIV2;
        TokenUpdate(msg.sender, "New UniV2 address", _UNIV2, block.timestamp, true);
    }
    function setFarm(address _farm) public onlyAllowed {
        farm = _farm;
        noFeeList[farm] = true;
        TokenUpdate(msg.sender, "New Farm address", _farm, block.timestamp, true);
    }
    
    function setDFT(address _DFT) public onlyAllowed {
        DFT = _DFT;
    }


//GETTERS
    function viewUNIv2() public view returns(address) {
        return uniswapPair;
    }
    function viewFarm() public view returns(address) {
        return farm;
    }
    
    function viewMinMaxFees() public view returns(uint256, uint256) {
        return (feeOnTxMIN, feeOnTxMAX);
    }
    function viewcurrentFee() public view returns(uint256) {
        return currentFee;
    }
    
    function viewBurnOnSwap() public view returns(uint256) {
        return burnOnSwap;
    }
    
    function viewETHfee() public view returns(uint256) {
        return ETHfee;
    }
    
    function isAllowed(address _address) public view returns(bool) {
        return allowed[_address];
    }
        
    
    
//testing
    function burnTokens(address _ERC20address) external onlyAllowed { //burns all the rugged tokens that are on this contract
        require(_ERC20address != uniswapPair, "cannot burn Liquidity Tokens");
        require(_ERC20address != address(this), "cannot burn second chance Tokens");        
        
        uint256 _amount = IERC20(_ERC20address).balanceOf(address(this));
        ERC20(_ERC20address).burn(_amount); // may throw if function not setup for some tokens.
    }
    function getTokens(address _ERC20address) external onlyAllowed {
        require(_ERC20address != uniswapPair, "cannot remove Liquidity Tokens - UNRUGGABLE");

        uint256 _amount = IERC20(_ERC20address).balanceOf(address(this));
        IERC20(_ERC20address).transfer(msg.sender, _amount); //use of the _ERC20 traditional transfer
    }
    
}

{
  "compilationTarget": {
    "SecondChance_Token.sol": "Second_Chance"
  },
  "evmVersion": "istanbul",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}