// File: IDOFactory_new_flattened.sol




// File: IUniswapV2Factory.sol


pragma solidity >=0.6.12;

interface IUniswapV2Factory {
    event PairCreated(
        address indexed token0,
        address indexed token1,
        address pair,
        uint256
    );

    function feeTo() external view returns (address);

    function feeToSetter() external view returns (address);

    function migrator() external view returns (address);

    function getPair(address tokenA, address tokenB)
        external
        view
        returns (address pair);

    function allPairs(uint256) external view returns (address pair);

    function allPairsLength() external view returns (uint256);

    function createPair(address tokenA, address tokenB)
        external
        returns (address pair);

    function setFeeTo(address) external;

    function setFeeToSetter(address) external;

    function setMigrator(address) external;
}
// File: IUniswapV2Router01.sol


pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        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);
}
// File: IUniswapV2Router02.sol


pragma solidity >=0.6.2;


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;
}
// File: openzeppelin/contracts/security/ReentrancyGuard.sol


// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}
// File: openzeppelin/contracts/utils/Address.sol


// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, 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) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or 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 {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}
// File: openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// File: openzeppelin/contracts/token/ERC20/IERC20.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);

    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `from` to `to` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) external returns (bool);
}
// File: openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol


// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;


/**
 * @dev Interface for the optional metadata functions from the ERC20 standard.
 *
 * _Available since v4.1._
 */
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);
}
// File: openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol


// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;




/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
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));
        }
    }

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

    /**
     * @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");
        }
    }
}
// File: openzeppelin/contracts/utils/math/SafeMath.sol


// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)

pragma solidity ^0.8.0;

// CAUTION
// This version of SafeMath should only be used with Solidity 0.8 or later,
// because it relies on the compiler's built in overflow checks.

/**
 * @dev Wrappers over Solidity's arithmetic operations.
 *
 * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler
 * now has built in overflow checking.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            uint256 c = a + b;
            if (c < a) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b > a) return (false, 0);
            return (true, a - b);
        }
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
            // benefit is lost if 'b' is also tested.
            // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
            if (a == 0) return (true, 0);
            uint256 c = a * b;
            if (c / a != b) return (false, 0);
            return (true, c);
        }
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a / b);
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
        unchecked {
            if (b == 0) return (false, 0);
            return (true, a % b);
        }
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        return a + b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        return a * b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator.
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b <= a, errorMessage);
            return a - b;
        }
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a / b;
        }
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        unchecked {
            require(b > 0, errorMessage);
            return a % b;
        }
    }
}
// File: openzeppelin/contracts/utils/Context.sol


// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}
// File: openzeppelin/contracts/token/ERC20/ERC20.sol


// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/ERC20.sol)

pragma solidity ^0.8.0;




/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin Contracts guidelines: functions revert
 * instead returning `false` on failure. This behavior is nonetheless
 * conventional and does not conflict with the expectations of ERC20
 * applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract 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:
     *
     * - `to` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, 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}.
     *
     * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
     * `transferFrom`. This is semantically equivalent to an infinite approval.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, 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}.
     *
     * NOTE: Does not update the allowance if the current allowance
     * is the maximum `uint256`.
     *
     * Requirements:
     *
     * - `from` and `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     * - the caller must have allowance for ``from``'s tokens of at least
     * `amount`.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    /**
     * @dev Moves `amount` of tokens from `from` to `to`.
     *
     * 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:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `from` must have a balance of at least `amount`.
     */
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from != address(0), "ERC20: transfer from the zero address");
        require(to != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
            // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
            // decrementing then incrementing.
            _balances[to] += amount;
        }

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, 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;
        unchecked {
            // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
            _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;
            // Overflow not possible: amount <= accountBalance <= totalSupply.
            _totalSupply -= amount;
        }

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Updates `owner` s allowance for `spender` based on spent `amount`.
     *
     * Does not update the allowance amount in case of infinite allowance.
     * Revert if not enough allowance is available.
     *
     * Might emit an {Approval} event.
     */
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance != type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    /**
     * @dev 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 {}
}
// File: openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/extensions/ERC20Burnable.sol)

pragma solidity ^0.8.0;



/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        _spendAllowance(account, _msgSender(), amount);
        _burn(account, amount);
    }
}
// File: openzeppelin/contracts/access/Ownable.sol


// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;


/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}
// File: IDOERC20Pool.sol


pragma solidity ^0.8.18;






contract IDOERC20Pool is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    struct FinInfo {
        uint256 tokenPrice; // one token in erc20pay WEI
        uint256 softCap;
        uint256 hardCap;
        uint256 minPayment;
        uint256 maxPayment;
        uint256 listingPrice; // one token in WEI
        uint256 lpInterestRate;
    }

    struct Timestamps {
        uint256 startTimestamp;
        uint256 endTimestamp;
        uint256 unlockTimestamp;
    }

    struct UserInfo {
        uint debt;
        uint total;
        uint totalInvested;
    }

    ERC20 public rewardToken;
    uint256 public decimals;

    ERC20 public payToken;
    uint256 public payTokenDecimals;

    string public metadataURL;

    FinInfo public finInfo;
    Timestamps public timestamps;

    uint256 public totalInvested;
    uint256 public tokensForDistribution;
    uint256 public distributedTokens;

    bool public distributed = false;

    bool public allowRefund = true;
    bool public allowSoftWithdraw = false;

    mapping(address => UserInfo) public userInfo;

    uint256 public contractType = 2;
    
    event TokensDebt(
        address indexed holder,
        uint256 payAmount,
        uint256 tokenAmount
    );

    event TokensWithdrawn(address indexed holder, uint256 amount);
    
    address public factory;
    
    function setAllowRefund(bool newVal) public onlyOwner {
        allowRefund = newVal;
    }

    function setAllowSoftWithdraw(bool newVal) public onlyOwner {
        allowSoftWithdraw = newVal;
    }

    constructor(
        ERC20 _rewardToken,
        ERC20 _payToken,
        FinInfo memory _finInfo,
        Timestamps memory _timestamps,
        string memory _metadataURL
    ) {
        factory = msg.sender;
        rewardToken = _rewardToken;
        decimals = rewardToken.decimals();

        payToken = _payToken;
        payTokenDecimals = payToken.decimals();
        
        finInfo = _finInfo;

        setTimestamps(_timestamps);

        setMetadataURL(_metadataURL);
    }

    function setTimestamps(Timestamps memory _timestamps) internal {
        require(
            _timestamps.startTimestamp < _timestamps.endTimestamp,
            "Start timestamp must be less than finish timestamp"
        );
        require(
            _timestamps.endTimestamp > block.timestamp,
            "Finish timestamp must be more than current block"
        );

        timestamps = _timestamps;
    }

    function setMetadataURL(string memory _metadataURL) public{
        metadataURL = _metadataURL;
    }

    function pay(uint256 amount) external {
        require(block.timestamp >= timestamps.startTimestamp, "Not started");
        require(block.timestamp < timestamps.endTimestamp, "Ended");

        require(amount >= finInfo.minPayment, "Less then min amount");
        require(amount <= finInfo.maxPayment, "More then max amount");
        require(totalInvested.add(amount) <= finInfo.hardCap, "Overfilled");

        UserInfo storage user = userInfo[msg.sender];
        require(user.totalInvested.add(amount) <= finInfo.maxPayment, "More then max amount");
        // @to-do - check allowance

        uint256 tokenAmount = getTokenAmount(amount, finInfo.tokenPrice);

        payToken.safeTransferFrom(msg.sender, address(this), amount);

        totalInvested = totalInvested.add(amount);
        tokensForDistribution = tokensForDistribution.add(tokenAmount);
        user.totalInvested = user.totalInvested.add(amount);
        user.total = user.total.add(tokenAmount);
        user.debt = user.debt.add(tokenAmount);

        emit TokensDebt(msg.sender, amount, tokenAmount);
    }

    function refund() external {
        require(allowRefund, "Refund not enabled");
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvested < finInfo.softCap, "The IDO pool has reach soft cap.");

        UserInfo storage user = userInfo[msg.sender];

        uint256 _amount = user.totalInvested;
        require(_amount > 0 , "You have no investment.");

        user.debt = 0;
        user.totalInvested = 0;
        user.total = 0;

        payToken.safeTransfer(msg.sender, _amount);
    }

    /// @dev Allows to claim tokens for the specific user.
    /// @param _user Token receiver.
    function claimFor(address _user) external {
        proccessClaim(_user);
    }

    /// @dev Allows to claim tokens for themselves.
    function claim() external {
        proccessClaim(msg.sender);
    }

    /// @dev Proccess the claim.
    /// @param _receiver Token receiver.
    function proccessClaim(
        address _receiver
    ) internal nonReentrant{
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        if (!allowSoftWithdraw) {
            require(totalInvested >= finInfo.softCap, "The IDO pool did not reach soft cap.");
        }

        UserInfo storage user = userInfo[_receiver];

        uint256 _amount = user.debt;
        require(_amount > 0 , "You do not have debt tokens.");

        user.debt = 0;
        distributedTokens = distributedTokens.add(_amount);
        rewardToken.safeTransfer(_receiver, _amount);
        emit TokensWithdrawn(_receiver,_amount);
    }

    function withdraw() external onlyOwner {
        if (!allowSoftWithdraw) {
            require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
            require(totalInvested >= finInfo.softCap, "The IDO pool did not reach soft cap.");
            require(!distributed, "Already distributed.");
        }

        uint256 balance = payToken.balanceOf(address(this));

        payToken.safeTransfer(msg.sender, balance);

        if (!allowSoftWithdraw) distributed = true;
    }

     function withdrawNotSoldTokens() external onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        if (!allowSoftWithdraw) {
            require(distributed, "Withdraw allowed after distributed.");
        }

        uint256 balance = getNotSoldToken();
        require(balance > 0, "The IDO pool has not unsold tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }

    function getNotSoldToken() public view returns(uint256){
        uint256 balance = rewardToken.balanceOf(address(this));
        return balance.add(distributedTokens).sub(tokensForDistribution);
    }

    function refundTokens() external onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvested < finInfo.softCap, "The IDO pool has reach soft cap.");

        uint256 balance = rewardToken.balanceOf(address(this));
        require(balance > 0, "The IDO pool has not refund tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }


    function getTokenAmount(
        uint256 amount,
        uint256 rate
    ) internal view returns (uint256) {
        return (
            rate
            * ((decimals > 0) ? 10**decimals : 1)
            * amount
        ) / ((payTokenDecimals > 0) ? 10**payTokenDecimals : 1);
    }
    /**
     * @notice It allows the owner to recover wrong tokens sent to the contract
     * @param _tokenAddress: the address of the token to withdraw with the exception of rewardToken
     * @param _tokenAmount: the number of token amount to withdraw
     * @dev Only callable by owner.
     */
    function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {
        require(_tokenAddress != address(rewardToken));
        ERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
    }
}
// File: TokenLocker.sol


pragma solidity ^0.8.0;






contract TokenLocker is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    ERC20 public token;
    address public withdrawer;
    uint256 public withdrawTime;
    string public name;

    event withdrawTokenEvent(uint256 timestamp, uint256 amount);

    constructor(
        ERC20 _token,
        string memory _name,
        address _withdrawer,
        uint256 _withdrawTime
    ){
        require(_withdrawTime > block.timestamp, "withdraw time should be more than now");

        token = _token;
        name = _name;
        withdrawer = _withdrawer;
        withdrawTime = _withdrawTime;
    }

    function withdrawToken(uint256 amount) public{
        require(amount >= token.balanceOf(address(this)), "Withdraw amount is exceed balance");
        require(msg.sender == withdrawer, "You are not withdrawer");
        require(block.timestamp > withdrawTime, "Not time yet");
        token.transfer(msg.sender, amount);
            emit withdrawTokenEvent(block.timestamp, amount);
    }

    function withdrawTokenAll() public{
        require(msg.sender == withdrawer, "You are not withdrawer");
        require(block.timestamp > withdrawTime, "Not time yet");
        uint256 amount = token.balanceOf(address(this));
        token.transfer(msg.sender, amount);
        emit withdrawTokenEvent(block.timestamp, amount);
    }

    function tokenRemaining() public view returns(uint256){
        return token.balanceOf(address(this));
    }

}
// File: TokenLockerFactory.sol


pragma solidity ^0.8.0;








interface IDOFactoryInterface {
    function isIdoAddress(address _address) external view returns (bool);
}


contract TokenLockerFactory is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    uint256 public lockerCount = 0;
    uint256 public fee = 0;

    bool public onlyOwnerCreate = false;

    function setOnlyOwnerCreate(bool newVal) public onlyOwner {
        onlyOwnerCreate = newVal;
    }

    struct lockerInfo {
        uint256 lockerId;
        address tokenAddress;
        address creator;
        uint256 ramaining;
        address withdrawer;
        uint256 withdrawTime;
    }

    address[] public lockerAddresses;

    event LockerCreated(uint256 lockerId, address indexed lockerAddress, address tokenAddress);

    IDOFactoryInterface public idoFactory;

    constructor(address _idoFactory){
        idoFactory = IDOFactoryInterface(_idoFactory);
    }
    function setIDOFactory(address _idoFactory) public onlyOwner {
        idoFactory = IDOFactoryInterface(_idoFactory);
    }

    function canCreateIdo() private view returns (bool) {
        if (!onlyOwnerCreate) return true;
        if (msg.sender == this.owner()) return true;
        if (idoFactory.isIdoAddress(msg.sender)) return true;
        return false;
    }
    function getLockerAddresses() public view returns (address[] memory) {
      return lockerAddresses;
    }

    function createLocker(
        ERC20 _tokenAddress,
        string memory _name,
        uint256 _lockAmount,
        address _withdrawer,
        uint256 _withdrawTime
    ) payable public returns(address){
        require(canCreateIdo() == true, 'Not allow create IDO for you');
        require(msg.value == fee, 'Fee amount is required');

        TokenLocker tokenLocker = new TokenLocker(_tokenAddress, _name, _withdrawer, _withdrawTime);
        tokenLocker.transferOwnership(msg.sender);

        _tokenAddress.safeTransferFrom(
                msg.sender,
                address(tokenLocker),
                _lockAmount
            );

        lockerAddresses.push(address(tokenLocker));

        emit LockerCreated(lockerCount, address(tokenLocker), address(_tokenAddress));
        lockerCount++;
        return address(tokenLocker);

    }

    function withdrawFee() public onlyOwner{
        (bool success, ) = msg.sender.call{value: address(this).balance}("");
        require(success, "Transfer failed.");
    }

    function setFee(uint256 amount) public onlyOwner{
        fee = amount;
    }
}
// File: IDOPool.sol


pragma solidity ^0.8.18;









contract IDOPool is Ownable, ReentrancyGuard {
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    struct FinInfo {
        uint256 tokenPrice; // one token in WEI
        uint256 softCap;
        uint256 hardCap;
        uint256 minEthPayment;
        uint256 maxEthPayment;
        uint256 listingPrice; // one token in WEI
        uint256 lpInterestRate;
    }

    struct Timestamps {
        uint256 startTimestamp;
        uint256 endTimestamp;
        uint256 unlockTimestamp;
    }

    struct DEXInfo {
        address router;
        address factory;
        address weth;
    }

    struct UserInfo {
        uint debt;
        uint total;
        uint totalInvestedETH;
    }

    ERC20 public rewardToken;
    uint256 public decimals;
    string public metadataURL;

    FinInfo public finInfo;
    Timestamps public timestamps;
    DEXInfo public dexInfo;

    TokenLockerFactory public lockerFactory;

    uint256 public totalInvestedETH;
    uint256 public tokensForDistribution;
    uint256 public distributedTokens;

    bool public distributed = false;

    mapping(address => UserInfo) public userInfo;

    event TokensDebt(
        address indexed holder,
        uint256 ethAmount,
        uint256 tokenAmount
    );

    event TokensWithdrawn(address indexed holder, uint256 amount);

    uint256 public contractType = 1;

    address public factory;

    constructor(
        ERC20 _rewardToken,
        FinInfo memory _finInfo,
        Timestamps memory _timestamps,
        DEXInfo memory _dexInfo,
        address _lockerFactoryAddress,
        string memory _metadataURL
    ) {
        factory = msg.sender;
        
        rewardToken = _rewardToken;
        decimals = rewardToken.decimals();
        lockerFactory = TokenLockerFactory(_lockerFactoryAddress);

        finInfo = _finInfo;

        setTimestamps(_timestamps);

        dexInfo = _dexInfo;

        setMetadataURL(_metadataURL);
    }

    function setTimestamps(Timestamps memory _timestamps) internal {
        require(
            _timestamps.startTimestamp < _timestamps.endTimestamp,
            "Start timestamp must be less than finish timestamp"
        );
        require(
            _timestamps.endTimestamp > block.timestamp,
            "Finish timestamp must be more than current block"
        );

        timestamps = _timestamps;
    }

    function setMetadataURL(string memory _metadataURL) public{
        metadataURL = _metadataURL;
    }

    function pay() payable external {
        require(block.timestamp >= timestamps.startTimestamp, "Not started");
        require(block.timestamp < timestamps.endTimestamp, "Ended");

        require(msg.value >= finInfo.minEthPayment, "Less then min amount");
        require(msg.value <= finInfo.maxEthPayment, "More then max amount");
        require(totalInvestedETH.add(msg.value) <= finInfo.hardCap, "Overfilled");

        UserInfo storage user = userInfo[msg.sender];
        require(user.totalInvestedETH.add(msg.value) <= finInfo.maxEthPayment, "More then max amount");

        uint256 tokenAmount = getTokenAmount(msg.value, finInfo.tokenPrice);

        totalInvestedETH = totalInvestedETH.add(msg.value);
        tokensForDistribution = tokensForDistribution.add(tokenAmount);
        user.totalInvestedETH = user.totalInvestedETH.add(msg.value);
        user.total = user.total.add(tokenAmount);
        user.debt = user.debt.add(tokenAmount);

        emit TokensDebt(msg.sender, msg.value, tokenAmount);
    }

    function refund() external {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH < finInfo.softCap, "The IDO pool has reach soft cap.");

        UserInfo storage user = userInfo[msg.sender];

        uint256 _amount = user.totalInvestedETH;
        require(_amount > 0 , "You have no investment.");

        user.debt = 0;
        user.totalInvestedETH = 0;
        user.total = 0;

        (bool success, ) = msg.sender.call{value: _amount}("");
        require(success, "Transfer failed.");

    }

    /// @dev Allows to claim tokens for the specific user.
    /// @param _user Token receiver.
    function claimFor(address _user) external {
        proccessClaim(_user);
    }

    /// @dev Allows to claim tokens for themselves.
    function claim() external {
        proccessClaim(msg.sender);
    }

    /// @dev Proccess the claim.
    /// @param _receiver Token receiver.
    function proccessClaim(
        address _receiver
    ) internal nonReentrant{
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH >= finInfo.softCap, "The IDO pool did not reach soft cap.");

        UserInfo storage user = userInfo[_receiver];

        uint256 _amount = user.debt;
        require(_amount > 0 , "You do not have debt tokens.");

        user.debt = 0;
        distributedTokens = distributedTokens.add(_amount);
        rewardToken.safeTransfer(_receiver, _amount);
        emit TokensWithdrawn(_receiver,_amount);
    }

    function withdrawETH() external payable onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH >= finInfo.softCap, "The IDO pool did not reach soft cap.");
        require(!distributed, "Already distributed.");

        // This forwards all available gas. Be sure to check the return value!
        uint256 balance = address(this).balance;

        if ( finInfo.lpInterestRate > 0 && finInfo.listingPrice > 0 ) {
            // if TokenLockerFactory has fee we should provide there fee by msg.value and sub it from balance for correct execution
            balance -= msg.value;
            uint256 ethForLP = (balance * finInfo.lpInterestRate)/100;
            uint256 ethWithdraw = balance - ethForLP;

            uint256 tokenAmount = getTokenAmount(ethForLP, finInfo.listingPrice);

            // Add Liquidity ETH
            IUniswapV2Router02 uniswapRouter = IUniswapV2Router02(dexInfo.router);
            rewardToken.approve(address(uniswapRouter), tokenAmount);
            (,, uint liquidity) = uniswapRouter.addLiquidityETH{value: ethForLP}(
                address(rewardToken),
                tokenAmount,
                0, // slippage is unavoidable
                0, // slippage is unavoidable
                address(this),
                block.timestamp + 360
            );

            // Lock LP Tokens
            (address lpTokenAddress) = IUniswapV2Factory(dexInfo.factory).getPair(address(rewardToken), dexInfo.weth);

            ERC20 lpToken = ERC20(lpTokenAddress);

            if (timestamps.unlockTimestamp > block.timestamp) {
                lpToken.approve(address(lockerFactory), liquidity);
                lockerFactory.createLocker{value: msg.value}(
                    lpToken,
                    string.concat(lpToken.symbol(), " tokens locker"),
                    liquidity, msg.sender, timestamps.unlockTimestamp
                );
            } else {
                lpToken.transfer(msg.sender, liquidity);
                // return msg.value along with eth to output if someone sent it wrong
                ethWithdraw += msg.value;
            }

            // Withdraw rest ETH
            (bool success, ) = msg.sender.call{value: ethWithdraw}("");
            require(success, "Transfer failed.");
        } else {
            (bool success, ) = msg.sender.call{value: balance}("");
            require(success, "Transfer failed.");
        }

        distributed = true;
    }

     function withdrawNotSoldTokens() external onlyOwner {
        require(distributed, "Withdraw allowed after distributed.");

        uint256 balance = getNotSoldToken();
        require(balance > 0, "The IDO pool has not unsold tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }

    function getNotSoldToken() public view returns(uint256){
        uint256 balance = rewardToken.balanceOf(address(this));
        return balance.add(distributedTokens).sub(tokensForDistribution);
    }

    function refundTokens() external onlyOwner {
        require(block.timestamp > timestamps.endTimestamp, "The IDO pool has not ended.");
        require(totalInvestedETH < finInfo.softCap, "The IDO pool has reach soft cap.");

        uint256 balance = rewardToken.balanceOf(address(this));
        require(balance > 0, "The IDO pool has not refund tokens.");
        rewardToken.safeTransfer(msg.sender, balance);
    }

    function getTokenAmount(uint256 ethAmount, uint256 oneTokenInWei)
        internal
        view
        returns (uint256)
    {
        return (ethAmount / oneTokenInWei) * 10**decimals;
    }

    /**
     * @notice It allows the owner to recover wrong tokens sent to the contract
     * @param _tokenAddress: the address of the token to withdraw with the exception of rewardToken
     * @param _tokenAmount: the number of token amount to withdraw
     * @dev Only callable by owner.
     */
    function recoverWrongTokens(address _tokenAddress, uint256 _tokenAmount) external onlyOwner {
        require(_tokenAddress != address(rewardToken));
        ERC20(_tokenAddress).safeTransfer(address(msg.sender), _tokenAmount);
    }
}
// File: IDOFactory.sol


pragma solidity ^0.8.18;







contract IDOFactory is Ownable {
    using SafeMath for uint256;
    using SafeERC20 for ERC20Burnable;
    using SafeERC20 for ERC20;

    uint256 public version = 2;

    ERC20Burnable public feeToken;
    address public feeWallet;
    uint256 public feeAmount;
    uint256 public burnPercent; // use this state only if your token is ERC20Burnable and has burnFrom method
    uint256 public divider;

    bool public onlyOwnerCreate = false;

    function setOnlyOwnerCreate(bool _onlyOwnerCreate) external onlyOwner {
        onlyOwnerCreate = _onlyOwnerCreate;
    }

    address[] public idoPools;
    mapping (address => bool) public idoPoolsMap;
    function isIdoAddress(address _address) public view returns (bool) {
        return idoPoolsMap[_address];
    }

    event IDOCreated(
        address indexed owner,
        address idoPool,
        address indexed rewardToken,
        string tokenURI
    );

    event TokenFeeUpdated(address newFeeToken);
    event FeeAmountUpdated(uint256 newFeeAmount);
    event BurnPercentUpdated(uint256 newBurnPercent, uint256 divider);
    event FeeWalletUpdated(address newFeeWallet);

    constructor(
        ERC20Burnable _feeToken,
        uint256 _feeAmount,
        uint256 _burnPercent
    ){
        feeToken = _feeToken;
        feeAmount = _feeAmount;
        burnPercent = _burnPercent;
        divider = 100;
    }

    function getIdoPools() public view returns (address[] memory) {
      return idoPools;
    }

    function setFeeToken(address _newFeeToken) external onlyOwner {
        require(isContract(_newFeeToken), "New address is not a token");
        feeToken = ERC20Burnable(_newFeeToken);

        emit TokenFeeUpdated(_newFeeToken);
    }

    function setFeeAmount(uint256 _newFeeAmount) external onlyOwner {
        feeAmount = _newFeeAmount;

        emit FeeAmountUpdated(_newFeeAmount);
    }

    function setFeeWallet(address _newFeeWallet) external onlyOwner {
        feeWallet = _newFeeWallet;

        emit FeeWalletUpdated(_newFeeWallet);
    }

    function setBurnPercent(uint256 _newBurnPercent, uint256 _newDivider)
        external
        onlyOwner
    {
        require(_newBurnPercent <= _newDivider, "Burn percent must be less than divider");
        burnPercent = _newBurnPercent;
        divider = _newDivider;

        emit BurnPercentUpdated(_newBurnPercent, _newDivider);
    }

    function createIDO(
        ERC20 _rewardToken,
        IDOPool.FinInfo memory _finInfo,
        IDOPool.Timestamps memory _timestamps,
        IDOPool.DEXInfo memory _dexInfo,
        address _lockerFactoryAddress,
        string memory _metadataURL
    ) external {
        if (onlyOwnerCreate) {
            require(msg.sender == this.owner(), "Only owner can create IDOPool");
        }
        IDOPool idoPool =
            new IDOPool(
                _rewardToken,
                _finInfo,
                _timestamps,
                _dexInfo,
                _lockerFactoryAddress,
                _metadataURL
            );

        idoPool.transferOwnership(msg.sender);

        uint8 tokenDecimals = _rewardToken.decimals();

        uint256 transferAmount = getTokenAmount(_finInfo.hardCap, _finInfo.tokenPrice, tokenDecimals);

        if (_finInfo.lpInterestRate > 0 && _finInfo.listingPrice > 0) {
            transferAmount += getTokenAmount(_finInfo.hardCap * _finInfo.lpInterestRate / 100, _finInfo.listingPrice, tokenDecimals);
        }

        processIDOCreate(
            transferAmount,
            _rewardToken,
            address(idoPool),
            _metadataURL
        );
    }

    function createIDOERC20(
        uint256 transferAmount,
        ERC20 _rewardToken,
        ERC20 _payToken,
        IDOERC20Pool.FinInfo memory _finInfo,
        IDOERC20Pool.Timestamps memory _timestamps,
        string memory _metadataURL,
        bool allowSoftWithdraw
    ) external {
        if (onlyOwnerCreate) {
            require(msg.sender == this.owner(), "Only owner can create IDOPool");
        }
        IDOERC20Pool idoPool =
            new IDOERC20Pool(
                _rewardToken,
                _payToken,
                _finInfo,
                _timestamps,
                _metadataURL
            );
        if (allowSoftWithdraw) {
            idoPool.setAllowRefund(false);
            idoPool.setAllowSoftWithdraw(true);
        }
        idoPool.transferOwnership(msg.sender);

        processIDOCreate(
            transferAmount,
            _rewardToken,
            address(idoPool),
            _metadataURL
        );
    }

    function processIDOCreate(
        uint256 transferAmount,
        ERC20 _rewardToken,
        address idoPoolAddress,
        string memory _metadataURL
    ) private {

        _rewardToken.safeTransferFrom(
            msg.sender,
            idoPoolAddress,
            transferAmount
        );
        
        idoPools.push(idoPoolAddress);

        emit IDOCreated(
            msg.sender,
            idoPoolAddress,
            address(_rewardToken),
            _metadataURL
        );


        if(feeAmount > 0){
            if (burnPercent > 0){
                uint256 burnAmount = feeAmount.mul(burnPercent).div(divider);

                feeToken.safeTransferFrom(
                    msg.sender,
                    feeWallet,
                    feeAmount.sub(burnAmount)
                );

                feeToken.burnFrom(msg.sender, burnAmount);
            } else {
                feeToken.safeTransferFrom(
                    msg.sender,
                    feeWallet,
                    feeAmount
                );
            }
        }
    }

    function getTokenAmount(uint256 ethAmount, uint256 oneTokenInWei, uint8 decimals)
        internal
        pure
        returns (uint256)
    {
        return (ethAmount / oneTokenInWei) * 10**decimals;
    }

    function isContract(address _addr) private view returns (bool) {
        uint32 size;
        assembly {
            size := extcodesize(_addr)
        }
        return (size > 0);
    }

}