// File: contracts/interfaces/IVaultFactory.sol


pragma solidity 0.8.4;

interface IVaultFactory {
    function notifyUnlock(bool isCompletelyUnlocked) external;
}

// File: contracts/interfaces/IVault.sol


pragma solidity 0.8.4;

interface IVault {
    function getBeneficiary() external view returns (address);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721Receiver.sol


// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/utils/Address.sol


// OpenZeppelin Contracts (last updated v4.7.0) (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 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
                /// @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/utils/SafeERC20.sol


// OpenZeppelin Contracts (last updated v4.7.0) (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/introspection/IERC165.sol


// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// File: @openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol


// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;


/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// File: @openzeppelin/contracts/token/ERC721/IERC721.sol


// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;


/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// File: contracts/interfaces/IVaultKey.sol


pragma solidity 0.8.4;


interface IVaultKey is IERC721 {
    function mintKey(address to) external;

    function lastMintedKeyId(address to) external view returns (uint256);
}

// File: @openzeppelin/contracts/token/ERC1155/IERC1155.sol


// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;


/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// File: contracts/interfaces/IDepositHandler.sol


pragma solidity 0.8.4;




interface IDepositHandler {
    struct FungibleTokenDeposit {
        address tokenAddress;
        uint256 amount;
        bool isLP;
    }

    struct NonFungibleTokenDeposit {
        address tokenAddress;
        uint256 tokenId;
    }

    struct MultiTokenDeposit {
        address tokenAddress;
        uint256 tokenId;
        uint256 amount;
    }
}

// File: contracts/vault/Vault.sol


pragma solidity 0.8.4;







contract Vault is IDepositHandler, IVault, IERC721Receiver, IERC1155Receiver {
    IVaultFactory public immutable vaultFactoryContract;
    IVaultKey public immutable vaultKeyContract;
    uint256 public immutable vaultKeyId;

    uint256 public immutable lockTimestamp;
    uint256 public immutable unlockTimestamp;
    bool public isUnlocked;

    modifier onlyKeyHolder() {
        require(vaultKeyContract.ownerOf(vaultKeyId) == msg.sender, "Vault:onlyKeyHolder:UNAUTHORIZED");
        _;
    }

    modifier onlyUnlockable() {
        require(block.timestamp >= unlockTimestamp, "Vault:onlyUnlockable:PREMATURE");
        _;
    }

    constructor(
        address _vaultKeyContractAddress,
        uint256 _keyId,
        uint256 _unlockTimestamp
    ) {
        vaultFactoryContract = IVaultFactory(msg.sender);
        vaultKeyContract = IVaultKey(_vaultKeyContractAddress);
        vaultKeyId = _keyId;

        lockTimestamp = block.timestamp;
        unlockTimestamp = _unlockTimestamp;
        isUnlocked = false;
    }

    function getBeneficiary() external view override returns (address) {
        return vaultKeyContract.ownerOf(vaultKeyId);
    }

    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return this.onERC721Received.selector;
    }

    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes calldata
    ) external pure override returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(
        address,
        address,
        uint256[] calldata,
        uint256[] calldata,
        bytes calldata
    ) external pure override returns (bytes4) {
        return this.onERC1155BatchReceived.selector;
    }

    function supportsInterface(bytes4 interfaceId) external pure override returns (bool) {
        return interfaceId == type(IERC721Receiver).interfaceId || interfaceId == type(IERC1155Receiver).interfaceId;
    }
}

// File: contracts/vault/MultiVault.sol


pragma solidity 0.8.4;







contract MultiVault is Vault {
    using SafeERC20 for IERC20;

    FungibleTokenDeposit[] public fungibleTokenDeposits;
    NonFungibleTokenDeposit[] public nonFungibleTokenDeposits;
    MultiTokenDeposit[] public multiTokenDeposits;

    constructor(
        address _vaultKeyContractAddress,
        uint256 _keyId,
        uint256 _unlockTimestamp,
        FungibleTokenDeposit[] memory _fungibleTokenDeposits,
        NonFungibleTokenDeposit[] memory _nonFungibleTokenDeposits,
        MultiTokenDeposit[] memory _multiTokenDeposits
    ) Vault(_vaultKeyContractAddress, _keyId, _unlockTimestamp) {
        for (uint256 i = 0; i < _fungibleTokenDeposits.length; i++) {
            fungibleTokenDeposits.push(_fungibleTokenDeposits[i]);
        }

        for (uint256 i = 0; i < _nonFungibleTokenDeposits.length; i++) {
            nonFungibleTokenDeposits.push(_nonFungibleTokenDeposits[i]);
        }

        for (uint256 i = 0; i < _multiTokenDeposits.length; i++) {
            multiTokenDeposits.push(_multiTokenDeposits[i]);
        }
    }

    function unlock(bytes memory data) external onlyKeyHolder onlyUnlockable {
        require(!isUnlocked, "MultiVault:unlock:ALREADY_OPEN: Vault has already been unlocked");

        for (uint256 i = 0; i < fungibleTokenDeposits.length; i++) {
            IERC20 token = IERC20(fungibleTokenDeposits[i].tokenAddress);
            uint256 balance = token.balanceOf(address(this));
            // in case a token is duplicated, only one transfer is required, hence the check
            if (balance > 0) {
                token.safeTransfer(msg.sender, balance);
            }
        }

        for (uint256 i = 0; i < nonFungibleTokenDeposits.length; i++) {
            IERC721(nonFungibleTokenDeposits[i].tokenAddress).safeTransferFrom(
                address(this),
                msg.sender,
                nonFungibleTokenDeposits[i].tokenId
            );
        }

        for (uint256 i = 0; i < multiTokenDeposits.length; i++) {
            IERC1155(multiTokenDeposits[i].tokenAddress).safeTransferFrom(
                address(this),
                msg.sender,
                multiTokenDeposits[i].tokenId,
                multiTokenDeposits[i].amount,
                data
            );
        }

        isUnlocked = true;
        vaultFactoryContract.notifyUnlock(true);
    }

    function partialFungibleTokenUnlock(address _tokenAddress, uint256 _tokenAmount)
        external
        onlyKeyHolder
        onlyUnlockable
    {
        require(_isLockedFungibleAddress(_tokenAddress), "MultiVault:partialFungibleTokenUnlock:INVALID_TOKEN");

        IERC20(_tokenAddress).safeTransfer(msg.sender, _tokenAmount);

        vaultFactoryContract.notifyUnlock(_isCompletelyUnlocked());
    }

    function partialNonFungibleTokenUnlock(address _tokenAddress, uint256 _tokenId)
        external
        onlyKeyHolder
        onlyUnlockable
    {
        require(_isLockedNonFungibleAddress(_tokenAddress), "MultiVault:partialNonFungibleTokenUnlock:INVALID_TOKEN");

        IERC721(_tokenAddress).safeTransferFrom(address(this), msg.sender, _tokenId);

        vaultFactoryContract.notifyUnlock(_isCompletelyUnlocked());
    }

    function partialMultiTokenUnlock(
        address _tokenAddress,
        uint256 _tokenId,
        uint256 _tokenAmount,
        bytes calldata data
    ) external onlyKeyHolder onlyUnlockable {
        require(_isLockedMultiAddress(_tokenAddress), "MultiVault:partialMultiTokenUnlock:INVALID_TOKEN");

        IERC1155(_tokenAddress).safeTransferFrom(address(this), msg.sender, _tokenId, _tokenAmount, data);

        vaultFactoryContract.notifyUnlock(_isCompletelyUnlocked());
    }

    function _isLockedFungibleAddress(address _tokenAddress) private view returns (bool) {
        for (uint256 i = 0; i < fungibleTokenDeposits.length; i++) {
            if (_tokenAddress == fungibleTokenDeposits[i].tokenAddress) {
                return true;
            }
        }

        return false;
    }

    function _isLockedNonFungibleAddress(address _tokenAddress) private view returns (bool) {
        for (uint256 i = 0; i < nonFungibleTokenDeposits.length; i++) {
            if (_tokenAddress == nonFungibleTokenDeposits[i].tokenAddress) {
                return true;
            }
        }

        return false;
    }

    function _isLockedMultiAddress(address _tokenAddress) private view returns (bool) {
        for (uint256 i = 0; i < multiTokenDeposits.length; i++) {
            if (_tokenAddress == multiTokenDeposits[i].tokenAddress) {
                return true;
            }
        }

        return false;
    }

    function _isCompletelyUnlocked() private view returns (bool) {
        for (uint256 i = 0; i < fungibleTokenDeposits.length; i++) {
            if (IERC20(fungibleTokenDeposits[i].tokenAddress).balanceOf(address(this)) > 0) {
                return false;
            }
        }

        for (uint256 i = 0; i < nonFungibleTokenDeposits.length; i++) {
            if (IERC721(nonFungibleTokenDeposits[i].tokenAddress).balanceOf(address(this)) > 0) {
                return false;
            }
        }

        for (uint256 i = 0; i < multiTokenDeposits.length; i++) {
            MultiTokenDeposit memory deposit = multiTokenDeposits[i];

            if (IERC1155(deposit.tokenAddress).balanceOf(address(this), deposit.tokenId) > 0) {
                return false;
            }
        }

        return true;
    }
}

// File: contracts/vault/FungibleVestingVault.sol


pragma solidity 0.8.4;






contract FungibleVestingVault is IDepositHandler, Vault {
    using SafeERC20 for IERC20;

    mapping(address => uint256) public lastVestingTimestamp;

    address[] public tokenAddresses;

    constructor(
        address _vaultKeyContractAddress,
        uint256 _keyId,
        uint256 _vestingEndTimestamp,
        FungibleTokenDeposit[] memory _fungibleTokenDeposits
    ) Vault(_vaultKeyContractAddress, _keyId, _vestingEndTimestamp) {
        for (uint256 i = 0; i < _fungibleTokenDeposits.length; i++) {
            tokenAddresses.push(_fungibleTokenDeposits[i].tokenAddress);
            lastVestingTimestamp[_fungibleTokenDeposits[i].tokenAddress] = block.timestamp;
        }
    }

    function vest() external onlyKeyHolder {
        for (uint256 i = 0; i < tokenAddresses.length; i++) {
            uint256 amountAvailable = getTokenAvailability(tokenAddresses[i]);
            if (amountAvailable > 0) {
                IERC20(tokenAddresses[i]).safeTransfer(msg.sender, amountAvailable);
                lastVestingTimestamp[tokenAddresses[i]] = block.timestamp;
            }
        }
        isUnlocked = _isCompletelyUnlocked();
        vaultFactoryContract.notifyUnlock(isUnlocked);
    }

    function partialVest(address _tokenAddress) external onlyKeyHolder {
        require(
            _isLockedFungibleAddress(_tokenAddress),
            "FungibleVestingVault:partialFungibleTokenVesting:INVALID_TOKEN"
        );

        uint256 amountAvailable = getTokenAvailability(_tokenAddress);
        IERC20(_tokenAddress).safeTransfer(msg.sender, amountAvailable);

        lastVestingTimestamp[_tokenAddress] = block.timestamp;
        isUnlocked = _isCompletelyUnlocked();
        vaultFactoryContract.notifyUnlock(isUnlocked);
    }

    function getTokenAvailability(address tokenAddress) public view returns (uint256) {
        // Send over all remaining tokens in the case where the unlock
        // timestamp has already expired. Otherwise vest linearly.
        uint256 balance = IERC20(tokenAddress).balanceOf(address(this));
        if (block.timestamp >= unlockTimestamp) {
            return balance;
        }
        return (balance * (block.timestamp - lastVestingTimestamp[tokenAddress])) / (unlockTimestamp - lockTimestamp);
    }

    function _isCompletelyUnlocked() private view returns (bool) {
        for (uint256 i = 0; i < tokenAddresses.length; i++) {
            if (IERC20(tokenAddresses[i]).balanceOf(address(this)) > 0) {
                return false;
            }
        }
        return true;
    }

    function _isLockedFungibleAddress(address _tokenAddress) private view returns (bool) {
        for (uint256 i = 0; i < tokenAddresses.length; i++) {
            if (_tokenAddress == tokenAddresses[i]) {
                return true;
            }
        }

        return false;
    }
}

// File: contracts/interfaces/IPaymentModule.sol


pragma solidity 0.8.4;


interface IPaymentModule is IDepositHandler {
    struct PaymentHolder {
        address tokenAddress;
        uint256 amount;
        uint256 payment;
    }

    function processPayment(
        address vault,
        address user,
        address referrer,
        FungibleTokenDeposit[] memory fungibleTokenDeposits,
        NonFungibleTokenDeposit[] memory nonFungibleTokenDeposits,
        MultiTokenDeposit[] memory multiTokenDeposit,
        bool isVesting
    ) external;
}

// File: contracts/VaultFactory.sol


pragma solidity 0.8.4;






contract VaultFactory is IDepositHandler {
    enum VaultStatus {
        Inactive,
        Locked,
        Unlocked
    }
    mapping(uint256 => address) public vaultByKey;
    mapping(address => VaultStatus) public vaultStatus;

    address public owner;
    IVaultKey public keyNFT;
    IPaymentModule public paymentModule;
    uint256 public maxTokensPerVault;

    event MaxTokensUpdated(uint256 indexed oldMax, uint256 indexed newMax);
    event PaymentModuleUpdated(address indexed oldModule, address indexed newModule);
    event VaultUnlocked(address indexed vault, uint256 timestamp, bool isCompletelyUnlocked);

    event VaultCreated(
        address indexed vault,
        uint256 indexed key,
        address benefactor,
        address indexed beneficiary,
        uint256 unlockTimestamp,
        FungibleTokenDeposit[] fungibleTokenDeposits,
        NonFungibleTokenDeposit[] nonFungibleTokenDeposits,
        MultiTokenDeposit[] multiTokenDeposits,
        bool isVesting
    );

    constructor(
        address keyNFTAddress,
        address paymentModuleAddress,
        uint256 maxTokens
    ) {
        keyNFT = IVaultKey(keyNFTAddress);
        paymentModule = IPaymentModule(paymentModuleAddress);
        owner = msg.sender;
        maxTokensPerVault = maxTokens;
    }

    function setMaxTokensPerVault(uint256 newMax) external {
        require(msg.sender == owner, "VaultFactory:setMaxTokensPerVault:OWNER_ONLY");

        uint256 oldMax = maxTokensPerVault;
        maxTokensPerVault = newMax;

        emit MaxTokensUpdated(oldMax, newMax);
    }

    function createVault(
        address referrer,
        address beneficiary,
        uint256 unlockTimestamp,
        FungibleTokenDeposit[] memory fungibleTokenDeposits,
        NonFungibleTokenDeposit[] memory nonFungibleTokenDeposits,
        MultiTokenDeposit[] memory multiTokenDeposits,
        bool isVesting
    ) external {
        require(unlockTimestamp >= block.timestamp, "VaultFactory:createVault:UNLOCK_IN_PAST");
        require(
            fungibleTokenDeposits.length > 0 || nonFungibleTokenDeposits.length > 0 || multiTokenDeposits.length > 0,
            "VaultFactory:createVault:NO_DEPOSITS"
        );
        require(
            fungibleTokenDeposits.length + nonFungibleTokenDeposits.length + multiTokenDeposits.length <
                maxTokensPerVault,
            "VaultFactory:createVault:MAX_DEPOSITS_EXCEEDED"
        );
        for (uint256 i = 0; i < fungibleTokenDeposits.length; i++) {
            require(fungibleTokenDeposits[i].amount > 0, "VaultFactory:createVault:ZERO_DEPOSIT");
        }
        for (uint256 i = 0; i < multiTokenDeposits.length; i++) {
            require(multiTokenDeposits[i].amount > 0, "VaultFactory:createVault:ZERO_DEPOSIT");
        }

        // Mint a key for the new vault.
        keyNFT.mintKey(beneficiary);
        uint256 keyId = keyNFT.lastMintedKeyId(beneficiary);

        // Early definition of vault address variable to allow usage by the
        // conditional branches of this function.
        address vault;

        if (isVesting) {
            require(
                nonFungibleTokenDeposits.length == 0 && multiTokenDeposits.length == 0,
                "VaultFactory:createVault:ONLY_FUNGIBLE_VESTING"
            );

            vault = _createVestingVault(keyId, unlockTimestamp, fungibleTokenDeposits);
        } else {
            vault = _createBatchVault(
                keyId,
                unlockTimestamp,
                fungibleTokenDeposits,
                nonFungibleTokenDeposits,
                multiTokenDeposits
            );
        }

        paymentModule.processPayment(
            vault,
            msg.sender,
            referrer,
            fungibleTokenDeposits,
            nonFungibleTokenDeposits,
            multiTokenDeposits,
            isVesting
        );

        vaultByKey[keyId] = vault;
        vaultStatus[vault] = VaultStatus.Locked;

        emit VaultCreated(
            vault,
            keyId,
            msg.sender,
            beneficiary,
            unlockTimestamp,
            fungibleTokenDeposits,
            nonFungibleTokenDeposits,
            multiTokenDeposits,
            isVesting
        );
    }

    function notifyUnlock(bool isCompletelyUnlocked) external {
        require(vaultStatus[msg.sender] == VaultStatus.Locked, "VaultFactory:notifyUnlock:ALREADY_FULL_UNLOCKED");

        if (isCompletelyUnlocked) {
            vaultStatus[msg.sender] = VaultStatus.Unlocked;
        }

        emit VaultUnlocked(msg.sender, block.timestamp, isCompletelyUnlocked);
    }

    function updateOwner(address newOwner) external {
        require(msg.sender == owner, "VaultFactory:updateOwner:OWNER_ONLY");
        owner = newOwner;
    }

    function updatePaymentModule(address newModule) external {
        require(msg.sender == owner, "VaultFactory:updatePaymentModule:OWNER_ONLY");
        address oldModule = address(paymentModule);
        paymentModule = IPaymentModule(newModule);

        emit PaymentModuleUpdated(oldModule, newModule);
    }

    function _createVestingVault(
        uint256 keyId,
        uint256 unlockTimestamp,
        FungibleTokenDeposit[] memory fungibleTokenDeposits
    ) private returns (address) {
        FungibleVestingVault vault = new FungibleVestingVault(
            address(keyNFT),
            keyId,
            unlockTimestamp,
            fungibleTokenDeposits
        );

        return address(vault);
    }

    function _createBatchVault(
        uint256 keyId,
        uint256 unlockTimestamp,
        FungibleTokenDeposit[] memory fungibleTokenDeposits,
        NonFungibleTokenDeposit[] memory nonFungibleTokenDeposits,
        MultiTokenDeposit[] memory multiTokenDeposits
    ) private returns (address) {
        MultiVault vault = new MultiVault(
            address(keyNFT),
            keyId,
            unlockTimestamp,
            fungibleTokenDeposits,
            nonFungibleTokenDeposits,
            multiTokenDeposits
        );

        return address(vault);
    }
}