// File: @solidstate/contracts/access/ownable/IOwnableInternal.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { IERC173Internal } from '../../interfaces/IERC173Internal.sol';

interface IOwnableInternal is IERC173Internal {
    error Ownable__NotOwner();
    error Ownable__NotTransitiveOwner();
}

// File: @solidstate/contracts/access/ownable/OwnableInternal.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { IERC173 } from '../../interfaces/IERC173.sol';
import { AddressUtils } from '../../utils/AddressUtils.sol';
import { IOwnableInternal } from './IOwnableInternal.sol';
import { OwnableStorage } from './OwnableStorage.sol';

abstract contract OwnableInternal is IOwnableInternal {
    using AddressUtils for address;

    modifier onlyOwner() {
        if (msg.sender != _owner()) revert Ownable__NotOwner();
        _;
    }

    modifier onlyTransitiveOwner() {
        if (msg.sender != _transitiveOwner())
            revert Ownable__NotTransitiveOwner();
        _;
    }

    function _owner() internal view virtual returns (address) {
        return OwnableStorage.layout().owner;
    }

    function _transitiveOwner() internal view virtual returns (address owner) {
        owner = _owner();

        while (owner.isContract()) {
            try IERC173(owner).owner() returns (address transitiveOwner) {
                owner = transitiveOwner;
            } catch {
                break;
            }
        }
    }

    function _transferOwnership(address account) internal virtual {
        _setOwner(account);
    }

    function _setOwner(address account) internal virtual {
        OwnableStorage.Layout storage l = OwnableStorage.layout();
        emit OwnershipTransferred(l.owner, account);
        l.owner = account;
    }
}

// File: @solidstate/contracts/access/ownable/OwnableStorage.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

library OwnableStorage {
    struct Layout {
        address owner;
    }

    bytes32 internal constant STORAGE_SLOT =
        keccak256('solidstate.contracts.storage.Ownable');

    function layout() internal pure returns (Layout storage l) {
        bytes32 slot = STORAGE_SLOT;
        assembly {
            l.slot := slot
        }
    }
}

// File: @solidstate/contracts/interfaces/IERC173.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { IERC173Internal } from './IERC173Internal.sol';

/**
 * @title Contract ownership standard interface
 * @dev see https://eips.ethereum.org/EIPS/eip-173
 */
interface IERC173 is IERC173Internal {
    /**
     * @notice get the ERC173 contract owner
     * @return conrtact owner
     */
    function owner() external view returns (address);

    /**
     * @notice transfer contract ownership to new account
     * @param account address of new owner
     */
    function transferOwnership(address account) external;
}

// File: @solidstate/contracts/interfaces/IERC173Internal.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

/**
 * @title Partial ERC173 interface needed by internal functions
 */
interface IERC173Internal {
    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );
}

// File: @solidstate/contracts/proxy/IProxy.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

interface IProxy {
    error Proxy__ImplementationIsNotContract();

    fallback() external payable;
}

// File: @solidstate/contracts/proxy/Proxy.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { AddressUtils } from '../utils/AddressUtils.sol';
import { IProxy } from './IProxy.sol';

/**
 * @title Base proxy contract
 */
abstract contract Proxy is IProxy {
    using AddressUtils for address;

    /**
     * @notice delegate all calls to implementation contract
     * @dev reverts if implementation address contains no code, for compatibility with metamorphic contracts
     * @dev memory location in use by assembly may be unsafe in other contexts
     */
    fallback() external payable virtual {
        address implementation = _getImplementation();

        if (!implementation.isContract())
            revert Proxy__ImplementationIsNotContract();

        assembly {
            calldatacopy(0, 0, calldatasize())
            let result := delegatecall(
                gas(),
                implementation,
                0,
                calldatasize(),
                0,
                0
            )
            returndatacopy(0, 0, returndatasize())

            switch result
            case 0 {
                revert(0, returndatasize())
            }
            default {
                return(0, returndatasize())
            }
        }
    }

    /**
     * @notice get logic implementation address
     * @return implementation address
     */
    function _getImplementation() internal virtual returns (address);
}

// File: @solidstate/contracts/utils/AddressUtils.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

import { UintUtils } from './UintUtils.sol';

library AddressUtils {
    using UintUtils for uint256;

    error AddressUtils__InsufficientBalance();
    error AddressUtils__NotContract();
    error AddressUtils__SendValueFailed();

    function toString(address account) internal pure returns (string memory) {
        return uint256(uint160(account)).toHexString(20);
    }

    function isContract(address account) internal view returns (bool) {
        uint256 size;
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    function sendValue(address payable account, uint256 amount) internal {
        (bool success, ) = account.call{ value: amount }('');
        if (!success) revert AddressUtils__SendValueFailed();
    }

    function functionCall(
        address target,
        bytes memory data
    ) internal returns (bytes memory) {
        return
            functionCall(target, data, 'AddressUtils: failed low-level call');
    }

    function functionCall(
        address target,
        bytes memory data,
        string memory error
    ) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, error);
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                'AddressUtils: failed low-level call with value'
            );
    }

    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) internal returns (bytes memory) {
        if (value > address(this).balance)
            revert AddressUtils__InsufficientBalance();
        return _functionCallWithValue(target, data, value, error);
    }

    /**
     * @notice execute arbitrary external call with limited gas usage and amount of copied return data
     * @dev derived from https://github.com/nomad-xyz/ExcessivelySafeCall (MIT License)
     * @param target recipient of call
     * @param gasAmount gas allowance for call
     * @param value native token value to include in call
     * @param maxCopy maximum number of bytes to copy from return data
     * @param data encoded call data
     * @return success whether call is successful
     * @return returnData copied return data
     */
    function excessivelySafeCall(
        address target,
        uint256 gasAmount,
        uint256 value,
        uint16 maxCopy,
        bytes memory data
    ) internal returns (bool success, bytes memory returnData) {
        returnData = new bytes(maxCopy);

        assembly {
            // execute external call via assembly to avoid automatic copying of return data
            success := call(
                gasAmount,
                target,
                value,
                add(data, 0x20),
                mload(data),
                0,
                0
            )

            // determine whether to limit amount of data to copy
            let toCopy := returndatasize()

            if gt(toCopy, maxCopy) {
                toCopy := maxCopy
            }

            // store the length of the copied bytes
            mstore(returnData, toCopy)

            // copy the bytes from returndata[0:toCopy]
            returndatacopy(add(returnData, 0x20), 0, toCopy)
        }
    }

    function _functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory error
    ) private returns (bytes memory) {
        if (!isContract(target)) revert AddressUtils__NotContract();

        (bool success, bytes memory returnData) = target.call{ value: value }(
            data
        );

        if (success) {
            return returnData;
        } else if (returnData.length > 0) {
            assembly {
                let returnData_size := mload(returnData)
                revert(add(32, returnData), returnData_size)
            }
        } else {
            revert(error);
        }
    }
}

// File: @solidstate/contracts/utils/UintUtils.sol



// SPDX-License-Identifier: MIT

pragma solidity ^0.8.8;

/**
 * @title utility functions for uint256 operations
 * @dev derived from https://github.com/OpenZeppelin/openzeppelin-contracts/ (MIT license)
 */
library UintUtils {
    error UintUtils__InsufficientHexLength();

    bytes16 private constant HEX_SYMBOLS = '0123456789abcdef';

    function add(uint256 a, int256 b) internal pure returns (uint256) {
        return b < 0 ? sub(a, -b) : a + uint256(b);
    }

    function sub(uint256 a, int256 b) internal pure returns (uint256) {
        return b < 0 ? add(a, -b) : a - uint256(b);
    }

    function toString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return '0';
        }

        uint256 temp = value;
        uint256 digits;

        while (temp != 0) {
            digits++;
            temp /= 10;
        }

        bytes memory buffer = new bytes(digits);

        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }

        return string(buffer);
    }

    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return '0x00';
        }

        uint256 length = 0;

        for (uint256 temp = value; temp != 0; temp >>= 8) {
            unchecked {
                length++;
            }
        }

        return toHexString(value, length);
    }

    function toHexString(
        uint256 value,
        uint256 length
    ) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = '0';
        buffer[1] = 'x';

        unchecked {
            for (uint256 i = 2 * length + 1; i > 1; --i) {
                buffer[i] = HEX_SYMBOLS[value & 0xf];
                value >>= 4;
            }
        }

        if (value != 0) revert UintUtils__InsufficientHexLength();

        return string(buffer);
    }
}

// File: contracts/whitelist/WhitelistProxy.sol



// SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.17;

import { OwnableInternal } from '@solidstate/contracts/access/ownable/OwnableInternal.sol';
import { Proxy } from '@solidstate/contracts/proxy/Proxy.sol';

contract WhitelistProxy is Proxy, OwnableInternal {
    address private immutable IMPLEMENTATION;

    constructor(address whitelistImplementation) {
        IMPLEMENTATION = whitelistImplementation;
        _setOwner(msg.sender);
    }

    /**
     * @inheritdoc Proxy
     */
    function _getImplementation() internal view override returns (address) {
        return IMPLEMENTATION;
    }
}