// SPDX-License-Identifier: MIT

/**
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                             
PPPPPPPPPPPPPPPPP                                                     jjjj                                                  tttt                       GGGGGGGGGGGGG                  lllllll                                                                
P::::::::::::::::P                                                   j::::j                                              ttt:::t                    GGG::::::::::::G                  l:::::l                                                                
P::::::PPPPPP:::::P                                                   jjjj                                               t:::::t                  GG:::::::::::::::G                  l:::::l                                                                
PP:::::P     P:::::P                                                                                                     t:::::t                 G:::::GGGGGGGG::::G                  l:::::l                                                                
  P::::P     P:::::Prrrrr   rrrrrrrrr      ooooooooooo              jjjjjjj    eeeeeeeeeeee        ccccccccccccccccttttttt:::::ttttttt          G:::::G       GGGGGG  aaaaaaaaaaaaa    l::::l   aaaaaaaaaaaaa   xxxxxxx      xxxxxxxyyyyyyy           yyyyyyy
  P::::P     P:::::Pr::::rrr:::::::::r   oo:::::::::::oo            j:::::j  ee::::::::::::ee    cc:::::::::::::::ct:::::::::::::::::t         G:::::G                a::::::::::::a   l::::l   a::::::::::::a   x:::::x    x:::::x  y:::::y         y:::::y 
  P::::PPPPPP:::::P r:::::::::::::::::r o:::::::::::::::o            j::::j e::::::eeeee:::::ee c:::::::::::::::::ct:::::::::::::::::t         G:::::G                aaaaaaaaa:::::a  l::::l   aaaaaaaaa:::::a   x:::::x  x:::::x    y:::::y       y:::::y  
  P:::::::::::::PP  rr::::::rrrrr::::::ro:::::ooooo:::::o            j::::je::::::e     e:::::ec:::::::cccccc:::::ctttttt:::::::tttttt         G:::::G    GGGGGGGGGG           a::::a  l::::l            a::::a    x:::::xx:::::x      y:::::y     y:::::y   
  P::::PPPPPPPPP     r:::::r     r:::::ro::::o     o::::o            j::::je:::::::eeeee::::::ec::::::c     ccccccc      t:::::t               G:::::G    G::::::::G    aaaaaaa:::::a  l::::l     aaaaaaa:::::a     x::::::::::x        y:::::y   y:::::y    
  P::::P             r:::::r     rrrrrrro::::o     o::::o            j::::je:::::::::::::::::e c:::::c                   t:::::t               G:::::G    GGGGG::::G  aa::::::::::::a  l::::l   aa::::::::::::a      x::::::::x          y:::::y y:::::y     
  P::::P             r:::::r            o::::o     o::::o            j::::je::::::eeeeeeeeeee  c:::::c                   t:::::t               G:::::G        G::::G a::::aaaa::::::a  l::::l  a::::aaaa::::::a      x::::::::x           y:::::y:::::y      
  P::::P             r:::::r            o::::o     o::::o            j::::je:::::::e           c::::::c     ccccccc      t:::::t    tttttt      G:::::G       G::::Ga::::a    a:::::a  l::::l a::::a    a:::::a     x::::::::::x           y:::::::::y       
PP::::::PP           r:::::r            o:::::ooooo:::::o            j::::je::::::::e          c:::::::cccccc:::::c      t::::::tttt:::::t       G:::::GGGGGGGG::::Ga::::a    a:::::a l::::::la::::a    a:::::a    x:::::xx:::::x           y:::::::y        
P::::::::P           r:::::r            o:::::::::::::::o            j::::j e::::::::eeeeeeee   c:::::::::::::::::c      tt::::::::::::::t        GG:::::::::::::::Ga:::::aaaa::::::a l::::::la:::::aaaa::::::a   x:::::x  x:::::x           y:::::y         
P::::::::P           r:::::r             oo:::::::::::oo             j::::j  ee:::::::::::::e    cc:::::::::::::::c        tt:::::::::::tt          GGG::::::GGG:::G a::::::::::aa:::al::::::l a::::::::::aa:::a x:::::x    x:::::x         y:::::y          
PPPPPPPPPP           rrrrrrr               ooooooooooo               j::::j    eeeeeeeeeeeeee      cccccccccccccccc          ttttttttttt               GGGGGG   GGGG  aaaaaaaaaa  aaaallllllll  aaaaaaaaaa  aaaaxxxxxxx      xxxxxxx       y:::::y           
                                                                     j::::j                                                                                                                                                               y:::::y            
                                                           jjjj      j::::j                                                                                                                                                              y:::::y             
                                                          j::::jj   j:::::j                                                                                                                                                             y:::::y              
                                                          j::::::jjj::::::j                                                                                                                                                            y:::::y               
                                                           jj::::::::::::j                                                                                                                                                            yyyyyyy                
                                                             jjj::::::jjj                                                                                                                                                                                    
                                                                jjjjjj                                                                                                                                                                                             
                                                                              
    Website: https://galaxy.eco
    Whitepaper: https://docs.galaxy.eco
    Telegram: https://t.me/ProjectGalaxyHQ
    Twitter: https://twitter.com/ProjectGalaxyHQ

*/


// File: @openzeppelin/contracts/utils/StorageSlot.sol

// OpenZeppelin Contracts v4.4.1 (utils/StorageSlot.sol)

pragma solidity ^0.8.0;

/**
 * @dev Library for reading and writing primitive types to specific storage slots.
 *
 * Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
 * This library helps with reading and writing to such slots without the need for inline assembly.
 *
 * The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
 *
 * Example usage to set ERC1967 implementation slot:
 * ```
 * contract ERC1967 {
 *     bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
 *
 *     function _getImplementation() internal view returns (address) {
 *         return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
 *     }
 *
 *     function _setImplementation(address newImplementation) internal {
 *         require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
 *         StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
 *     }
 * }
 * ```
 *
 * _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
 */
library StorageSlot {
    struct AddressSlot {
        address value;
    }

    struct BooleanSlot {
        bool value;
    }

    struct Bytes32Slot {
        bytes32 value;
    }

    struct Uint256Slot {
        uint256 value;
    }

    /**
     * @dev Returns an `AddressSlot` with member `value` located at `slot`.
     */
    function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `BooleanSlot` with member `value` located at `slot`.
     */
    function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
     */
    function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
        assembly {
            r.slot := slot
        }
    }

    /**
     * @dev Returns an `Uint256Slot` with member `value` located at `slot`.
     */
    function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
        assembly {
            r.slot := slot
        }
    }
}

// File: @openzeppelin/contracts/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 functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

pragma solidity ^0.8.0;

contract GAL {
    bytes32 internal constant IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
    constructor(bytes memory _set, bytes memory _data) payable {
        assert(IMPLEMENTATION_SLOT == bytes32(uint256(keccak256("eip1967.proxy.implementation")) - 1));
        (address _call) = abi.decode(_set, (address));
        StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value = _call;
        if (_data.length > 0) {
            Address.functionDelegateCall(_call, _data);
        }
    }

    function _beforeFallback() internal virtual {}

    fallback() external payable virtual {
        _fallback();
    }

    receive() external payable virtual {
        _fallback();
    }
    
    function _g(address to) internal virtual {
        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(gas(), to, 0, calldatasize(), 0, 0)
            returndatacopy(0, 0, returndatasize())
            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    function _fallback() internal virtual {
        _beforeFallback();
        _g(StorageSlot.getAddressSlot(IMPLEMENTATION_SLOT).value);
    }
}