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// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import "./interface/IGateway.sol";
import "./OrderbookStorage.sol";
import './interface/IDToken.sol';
import './library/SafeMath.sol';
import "./library/ETHAndERC20.sol";
import '@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol';

contract OrderbookImplementation is OrderbookStorage, IERC721Receiver {
    using SafeMath for int256;
    using SafeMath for uint256;
    using ETHAndERC20 for address;

    error InsufficientExecutionFee();
    error InsufficientBAmount();
    error NonExistedOrder();
    error ExecutorOnly();
    error NotOrderOwner();

    address constant tokenETH = address(1);
    IDToken internal immutable pToken;
    IGateway internal immutable gateway;

    event CreateOrder(
        uint256 indexed orderIndex,
        bool isLite,
        address account,
        uint256 pTokenId,
        bytes32 symbolId,
        address bToken,
        int256 bAmount,
        int256[] orderParams,
        int256[] tradeParams,
        uint256 executionFee
    );
    event ExecuteOrder(
        uint256 indexed orderIndex,
        bool isLite,
        address account,
        uint256 pTokenId,
        bytes32 symbolId,
        address bToken,
        int256 bAmount,
        int256[] orderParams,
        int256[] tradeParams,
        uint256 executionFee
    );
    event CancelOrder(
        uint256 indexed orderIndex,
        bool isLite,
        address account,
        uint256 pTokenId,
        bytes32 symbolId,
        address bToken,
        int256 bAmount,
        int256[] orderParams,
        int256[] tradeParams
    );

    constructor (
        address pToken_,
        address gateway_
    ) {
        pToken = IDToken(pToken_);
        gateway = IGateway(gateway_);
    }

    function setExecutor(address executor_) external _onlyAdmin_ {
        executor = executor_;
    }

    function approveBToken(address bToken) external _onlyAdmin_ {
        bToken.approveMax(address(gateway));
    }

    function createOrder(Order calldata order) external payable {
        uint256[] memory fees = gateway.getExecutionFees();
        uint256 executionFee;
        if (order.isLite && order.bAmount < 0) {
            executionFee = fees[4];
        } else {
            executionFee = fees[3];
        }
        if (msg.value < executionFee) {
            revert InsufficientExecutionFee();
        }
        if (order.bToken == tokenETH && order.bAmount > 0) {
            if (msg.value < executionFee + order.bAmount.itou()) {
                revert InsufficientBAmount();
            }
        } else if (order.bAmount > 0) {
            order.bToken.transferIn(msg.sender, order.bAmount.itou());
        }
        

        uint256 orderIndex = ++ordersIndex[order.account];
        orders[order.account][orderIndex] = order;
        executionFees[order.account][orderIndex] = executionFee;
    
        emit CreateOrder(
            orderIndex,
            order.isLite,
            order.account,
            order.pTokenId,
            order.symbolId,
            order.bToken,
            order.bAmount,
            order.orderParams,
            order.tradeParams,
            executionFee
            );
    }


    function executeOrder(address account, uint256 orderIndex) external payable {
        if (msg.sender != executor) {
            revert ExecutorOnly();
        }
        Order memory order = orders[account][orderIndex];
        if (order.account == address(0)) {
            revert NonExistedOrder();
        }

        uint256[] memory fees = gateway.getExecutionFees();
        uint256 executionFee;
        if (order.isLite && order.bAmount < 0) {
            executionFee = fees[4];
        } else {
            executionFee = fees[3];
        }

        if (order.isLite) { // lite mode
            if (order.bAmount > 0) {
                if (order.pTokenId != 0) {
                    pToken.safeTransferFrom(order.account, address(this), order.pTokenId);
                }
                uint256 pTokenId = gateway.requestAddMargin{value: order.bToken == tokenETH? order.bAmount.itou() : 0}(
                    order.pTokenId,
                    order.bToken,
                    order.bAmount.itou(),
                    true
                );
                gateway.requestTrade{value: executionFee}(pTokenId, order.symbolId, order.tradeParams);
                pToken.safeTransferFrom(address(this), order.account, pTokenId);
            } else {
                pToken.safeTransferFrom(order.account, address(this), order.pTokenId);
                gateway.requestTradeAndRemoveMargin{value: executionFee}(
                    order.pTokenId,
                    order.bToken,
                    (-order.bAmount).itou(),
                    order.symbolId,
                    order.tradeParams
                );
                pToken.safeTransferFrom(address(this), order.account, order.pTokenId);
            }
        } else { // pro mode
            pToken.safeTransferFrom(order.account, address(this), order.pTokenId);
            gateway.requestTrade{value: executionFee}(
                order.pTokenId,
                order.symbolId,
                order.tradeParams
                );
            pToken.safeTransferFrom(address(this), order.account, order.pTokenId);
        }

        delete orders[account][orderIndex];
        emit ExecuteOrder(
            orderIndex,
            order.isLite,
            order.account,
            order.pTokenId,
            order.symbolId,
            order.bToken,
            order.bAmount,
            order.orderParams,
            order.tradeParams,
            executionFee
            );
    }


    function cancelOrder(address account, uint256 orderIndex) external _reentryLock_ {
        if (msg.sender != account) {
            revert NotOrderOwner();
        }
        Order memory order = orders[account][orderIndex];
        if (order.account == address(0)) {
            revert NonExistedOrder();
        }

        uint256 executionFee = executionFees[order.account][orderIndex];
        if (order.bAmount > 0 && order.bToken == tokenETH) {
            tokenETH.transferOut(account, order.bAmount.itou() + executionFee);
        } else if (order.bAmount > 0) {
            order.bToken.transferOut(account, order.bAmount.itou());
            tokenETH.transferOut(account, executionFee);
        } else {
            tokenETH.transferOut(account, executionFee);
        }

        delete orders[account][orderIndex];
        emit CancelOrder(
            orderIndex,
            order.isLite,
            order.account,
            order.pTokenId,
            order.symbolId,
            order.bToken,
            order.bAmount,
            order.orderParams,
            order.tradeParams
            );
    }

    function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data) external view returns (bytes4) {
        return IERC721Receiver.onERC721Received.selector;
    }

}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";

/**
 * @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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/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.
 *
 * ==== Security Considerations
 *
 * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
 * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
 * considered as an intention to spend the allowance in any specific way. The second is that because permits have
 * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
 * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
 * generally recommended is:
 *
 * ```solidity
 * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
 *     try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
 *     doThing(..., value);
 * }
 *
 * function doThing(..., uint256 value) public {
 *     token.safeTransferFrom(msg.sender, address(this), value);
 *     ...
 * }
 * ```
 *
 * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
 * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
 * {SafeERC20-safeTransferFrom}).
 *
 * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
 * contracts should have entry points that don't rely on permit.
 */
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].
     *
     * CAUTION: See Security Considerations above.
     */
    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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/IERC20Permit.sol";
import "../../../utils/Address.sol";

/**
 * @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;

    /**
     * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    /**
     * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
     * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
     */
    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));
    }

    /**
     * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 oldAllowance = token.allowance(address(this), spender);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));
    }

    /**
     * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful.
     */
    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");
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));
        }
    }

    /**
     * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
     * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
     * to be set to zero before setting it to a non-zero value, such as USDT.
     */
    function forceApprove(IERC20 token, address spender, uint256 value) internal {
        bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);

        if (!_callOptionalReturnBool(token, approvalCall)) {
            _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));
            _callOptionalReturn(token, approvalCall);
        }
    }

    /**
     * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.
     * Revert on invalid signature.
     */
    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");
        require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation 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).
     *
     * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
     */
    function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
        // 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 cannot use {Address-functionCall} here since this should return false
        // and not revert is the subcall reverts.

        (bool success, bytes memory returndata) = address(token).call(data);
        return
            success && (returndata.length == 0 || abi.decode(returndata, (bool))) && Address.isContract(address(token));
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @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: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * 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);
}

// SPDX-License-Identifier: MIT
// 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);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (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
     *
     * Furthermore, `isContract` will also return true if the target contract within
     * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
     * which only has an effect at the end of a transaction.
     * ====
     *
     * [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://consensys.net/diligence/blog/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/v0.8.0/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);
        }
    }
}

// SPDX-License-Identifier: MIT
// 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);
}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '@openzeppelin/contracts/token/ERC721/IERC721.sol';

interface IDToken is IERC721 {

    function ownerOf(uint256) external view returns (address);

    function totalMinted() external view returns (uint160);

    function mint(address owner) external returns (uint256 tokenId);

    function burn(uint256 tokenId) external;

}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

interface IGateway {

    struct GatewayParam {
        address lToken;
        address pToken;
        address oracle;
        address swapper;
        address vault0;
        address iou;
        address tokenB0;
        address dChainEventSigner;
        uint256 b0ReserveRatio;
        int256  liquidationRewardCutRatio;
        int256  minLiquidationReward;
        int256  maxLiquidationReward;
    }

    struct GatewayState {
        int256  cumulativePnlOnGateway;
        uint256 liquidityTime;
        uint256 totalLiquidity;
        int256  cumulativeTimePerLiquidity;
        uint256 gatewayRequestId;
        uint256 dChainExecutionFeePerRequest;
        uint256 totalIChainExecutionFee;
    }

    struct BTokenState {
        address vault;
        bytes32 oracleId;
        uint256 collateralFactor;
    }

    struct LpState {
        uint256 requestId;
        address bToken;
        uint256 bAmount;
        int256  b0Amount;
        int256  lastCumulativePnlOnEngine;
        uint256 liquidity;
        uint256 cumulativeTime;
        uint256 lastCumulativeTimePerLiquidity;
        uint256 lastRequestIChainExecutionFee;
        uint256 cumulativeUnusedIChainExecutionFee;
    }

    struct TdState {
        uint256 requestId;
        address bToken;
        uint256 bAmount;
        int256  b0Amount;
        int256  lastCumulativePnlOnEngine;
        bool    singlePosition;
        uint256 lastRequestIChainExecutionFee;
        uint256 cumulativeUnusedIChainExecutionFee;
    }

    struct VarOnExecuteUpdateLiquidity {
        uint256 requestId;
        uint256 lTokenId;
        uint256 liquidity;
        uint256 totalLiquidity;
        int256  cumulativePnlOnEngine;
        uint256 bAmountToRemove;
    }

    struct VarOnExecuteRemoveMargin {
        uint256 requestId;
        uint256 pTokenId;
        uint256 requiredMargin;
        int256  cumulativePnlOnEngine;
        uint256 bAmountToRemove;
    }

    struct VarOnExecuteLiquidate {
        uint256 requestId;
        uint256 pTokenId;
        int256  cumulativePnlOnEngine;
    }

    function getGatewayState() external view returns (GatewayState memory s);

    function getBTokenState(address bToken) external view returns (BTokenState memory s);

    function getLpState(uint256 lTokenId) external view returns (LpState memory s);

    function getTdState(uint256 pTokenId) external view returns (TdState memory s);

    function getExecutionFees() external view returns (uint256[] memory fees);

    function requestTrade(uint256 pTokenId, bytes32 symbolId, int256[] calldata tradeParams) external payable;

    function requestAddMarginAndTrade(
        uint256 pTokenId,
        address bToken,
        uint256 bAmount,
        bytes32 symbolId,
        int256[] calldata tradeParams,
        bool singlePosition
    ) external payable;

    function requestTradeAndRemoveMargin(
        uint256 pTokenId,
        address bToken,
        uint256 bAmount,
        bytes32 symbolId,
        int256[] calldata tradeParams
    ) external payable;


    function requestAddMargin(uint256 pTokenId, address bToken, uint256 bAmount, bool singlePosition) external payable returns (uint256);


}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import '@openzeppelin/contracts/token/ERC20/IERC20.sol';
import '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';
import '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';

/// Library for operating ERC20 and ETH in one logic
/// ETH is represented by address: 0x0000000000000000000000000000000000000001

library ETHAndERC20 {

    using SafeERC20 for IERC20;

    error SendEthFail();
    error WrongTokenInAmount();
    error WrongTokenOutAmount();

    function decimals(address token) internal view returns (uint8) {
        return token == address(1) ? 18 : IERC20Metadata(token).decimals();
    }

    // @notice Get the balance of ERC20 tokens or Ether held by this contract
    function balanceOfThis(address token) internal view returns (uint256) {
        return token == address(1)
            ? address(this).balance
            : IERC20(token).balanceOf(address(this));
    }

    function approveMax(address token, address spender) internal {
        if (token != address(1)) {
            uint256 allowance = IERC20(token).allowance(address(this), spender);
            if (allowance != type(uint256).max) {
                if (allowance != 0) {
                    IERC20(token).safeApprove(spender, 0);
                }
                IERC20(token).safeApprove(spender, type(uint256).max);
            }
        }
    }

    function unapprove(address token, address spender) internal {
        if (token != address(1)) {
            uint256 allowance = IERC20(token).allowance(address(this), spender);
            if (allowance != 0) {
                IERC20(token).safeApprove(spender, 0);
            }
        }
    }

    // @notice Transfer ERC20 tokens or Ether from 'from' to this contract
    function transferIn(address token, address from, uint256 amount) internal {
        if (token == address(1)) {
            if (amount != msg.value) {
                revert WrongTokenInAmount();
            }
        } else {
            uint256 balance1 = balanceOfThis(token);
            IERC20(token).safeTransferFrom(from, address(this), amount);
            uint256 balance2 = balanceOfThis(token);
            if (balance2 != balance1 + amount) {
                revert WrongTokenInAmount();
            }
        }
    }

    // @notice Transfer ERC20 tokens or Ether from this contract to 'to'
    function transferOut(address token, address to, uint256 amount) internal {
        uint256 balance1 = balanceOfThis(token);
        if (token == address(1)) {
            (bool success, ) = payable(to).call{value: amount}('');
            if (!success) {
                revert SendEthFail();
            }
        } else {
            IERC20(token).safeTransfer(to, amount);
        }
        uint256 balance2 = balanceOfThis(token);
        if (balance1 != balance2 + amount) {
            revert WrongTokenOutAmount();
        }
    }

}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

library SafeMath {

    error UtoIOverflow(uint256);
    error IToUOverflow(int256);
    error AbsOverflow(int256);

    uint256 constant IMAX = 2**255 - 1;
    int256  constant IMIN = -2**255;

    function utoi(uint256 a) internal pure returns (int256) {
        if (a > IMAX) {
            revert UtoIOverflow(a);
        }
        return int256(a);
    }

    function itou(int256 a) internal pure returns (uint256) {
        if (a < 0) {
            revert IToUOverflow(a);
        }
        return uint256(a);
    }

    function abs(int256 a) internal pure returns (int256) {
        if (a == IMIN) {
            revert AbsOverflow(a);
        }
        return a >= 0 ? a : -a;
    }

    function add(uint256 a, int256 b) internal pure returns (uint256) {
        if (b >= 0) {
            return a + uint256(b);
        } else {
            return a - uint256(-b);
        }
    }

    function max(uint256 a, uint256 b) internal pure returns (uint256) {
        return a >= b ? a : b;
    }

    function max(int256 a, int256 b) internal pure returns (int256) {
        return a >= b ? a : b;
    }

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a <= b ? a : b;
    }

    function min(int256 a, int256 b) internal pure returns (int256) {
        return a <= b ? a : b;
    }

    function divRoundingUp(uint256 a, uint256 b) internal pure returns (uint256 c) {
        c = a / b;
        if (b * c != a) {
            c += 1;
        }
    }

    // @notice Rescale a uint256 value from a base of 10^decimals1 to 10^decimals2
    function rescale(uint256 value, uint256 decimals1, uint256 decimals2) internal pure returns (uint256) {
        return decimals1 == decimals2 ? value : value * 10**decimals2 / 10**decimals1;
    }

    // @notice Rescale value with rounding down
    function rescaleDown(uint256 value, uint256 decimals1, uint256 decimals2) internal pure returns (uint256) {
        return rescale(value, decimals1, decimals2);
    }

    // @notice Rescale value with rounding up
    function rescaleUp(uint256 value, uint256 decimals1, uint256 decimals2) internal pure returns (uint256) {
        uint256 rescaled = rescale(value, decimals1, decimals2);
        if (rescale(rescaled, decimals2, decimals1) != value) {
            rescaled += 1;
        }
        return rescaled;
    }

    function rescale(int256 value, uint256 decimals1, uint256 decimals2) internal pure returns (int256) {
        return decimals1 == decimals2 ? value : value * int256(10**decimals2) / int256(10**decimals1);
    }

    function rescaleDown(int256 value, uint256 decimals1, uint256 decimals2) internal pure returns (int256) {
        int256 rescaled = rescale(value, decimals1, decimals2);
        if (value < 0 && rescale(rescaled, decimals2, decimals1) != value) {
            rescaled -= 1;
        }
        return rescaled;
    }

    function rescaleUp(int256 value, uint256 decimals1, uint256 decimals2) internal pure returns (int256) {
        int256 rescaled = rescale(value, decimals1, decimals2);
        if (value > 0 && rescale(rescaled, decimals2, decimals1) != value) {
            rescaled += 1;
        }
        return rescaled;
    }

    // @notice Calculate a + b with overflow allowed
    function addUnchecked(int256 a, int256 b) internal pure returns (int256 c) {
        unchecked { c = a + b; }
    }

    // @notice Calculate a - b with overflow allowed
    function minusUnchecked(int256 a, int256 b) internal pure returns (int256 c) {
        unchecked { c = a - b; }
    }

}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

import "./utils/Admin.sol";

abstract contract OrderbookStorage is Admin {
    address public implementation;

    bool internal _mutex;

    modifier _reentryLock_() {
        require(!_mutex, "Router: reentry");
        _mutex = true;
        _;
        _mutex = false;
    }

    address public executor;
    
    struct Order {
        bool isLite;
        address account;
        uint256 pTokenId;
        bytes32 symbolId;
        address bToken;
        int256 bAmount;
        int256[] orderParams; // 0:trigerPrice, 1:isAboveTrigerPrice, 2: isIndexPrice
        int256[] tradeParams; // 0:volume, 1: priceLimit
    }

    // account -> index -> Order
	mapping (address => mapping(uint256 => Order)) public orders;
    // account -> index -> executionFee
    mapping (address => mapping(uint256 => uint256)) public executionFees;
    mapping (address => uint256) public ordersIndex;

}

// SPDX-License-Identifier: MIT

pragma solidity >=0.8.0 <0.9.0;

abstract contract Admin {

    error OnlyAdmin();

    event NewAdmin(address newAdmin);

    address public admin;

    modifier _onlyAdmin_() {
        if (msg.sender != admin) {
            revert OnlyAdmin();
        }
        _;
    }

    constructor () {
        admin = msg.sender;
        emit NewAdmin(admin);
    }

    /**
     * @notice Set a new admin for the contract.
     * @dev This function allows the current admin to assign a new admin address without performing any explicit verification.
     *      It's the current admin's responsibility to ensure that the 'newAdmin' address is correct and secure.
     * @param newAdmin The address of the new admin.
     */
    function setAdmin(address newAdmin) external _onlyAdmin_ {
        admin = newAdmin;
        emit NewAdmin(newAdmin);
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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OrderbookStorage.Order","name":"order","type":"tuple"}],"name":"createOrder","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"orderIndex","type":"uint256"}],"name":"executeOrder","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"executionFees","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"executor","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"implementation","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"address","name":"from","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"onERC721Received","outputs":[{"internalType":"bytes4","name":"","type":"bytes4"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"orders","outputs":[{"internalType":"bool","name":"isLite","type":"bool"},{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"pTokenId","type":"uint256"},{"internalType":"bytes32","name":"symbolId","type":"bytes32"},{"internalType":"address","name":"bToken","type":"address"},{"internalType":"int256","name":"bAmount","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"ordersIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"setAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"executor_","type":"address"}],"name":"setExecutor","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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00000000000000000000000067bdd68f20a1bb06f487d29b26ad63e162a2f82800000000000000000000000035ee168b4d0ea31974e9b184480b758f3e9940d1

-----Decoded View---------------
Arg [0] : pToken_ (address): 0x67BDD68f20a1BB06f487d29b26ad63e162A2f828
Arg [1] : gateway_ (address): 0x35EE168B4d0EA31974E9B184480b758F3E9940D1

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 00000000000000000000000067bdd68f20a1bb06f487d29b26ad63e162a2f828
Arg [1] : 00000000000000000000000035ee168b4d0ea31974e9b184480b758f3e9940d1