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// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

import { Address, AddressLib } from "@1inch/solidity-utils/contracts/libraries/AddressLib.sol";
import { ECDSA } from "@1inch/solidity-utils/contracts/libraries/ECDSA.sol";
import { IOrderMixin } from "../interfaces/IOrderMixin.sol";
import { IOrderRegistrator } from "../interfaces/IOrderRegistrator.sol";
import { OrderLib } from "../OrderLib.sol";

/**
 * @title OrderRegistrator
 */
contract OrderRegistrator is IOrderRegistrator {
    using AddressLib for Address;
    using OrderLib for IOrderMixin.Order;

    IOrderMixin private immutable _LIMIT_ORDER_PROTOCOL;

    constructor(IOrderMixin limitOrderProtocol) {
        _LIMIT_ORDER_PROTOCOL = limitOrderProtocol;
    }

    /**
     * @notice See {IOrderRegistrator-registerOrder}.
     */
    function registerOrder(IOrderMixin.Order calldata order, bytes calldata extension, bytes calldata signature) external {
        // Validate order
        {
            (bool valid, bytes4 validationResult) = order.isValidExtension(extension);
            if (!valid) {
                // solhint-disable-next-line no-inline-assembly
                assembly ("memory-safe") {
                    mstore(0, validationResult)
                    revert(0, 4)
                }
            }
        }

        // Validate signature
        if(!ECDSA.recoverOrIsValidSignature(order.maker.get(), _LIMIT_ORDER_PROTOCOL.hashOrder(order), signature)) revert IOrderMixin.BadSignature();

        emit OrderRegistered(order, extension, signature);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

type Address is uint256;

/**
* @notice AddressLib
* @notice Library for working with addresses encoded as uint256 values, which can include flags in the highest bits.
*/
library AddressLib {
    uint256 private constant _LOW_160_BIT_MASK = (1 << 160) - 1;

    /**
    * @notice Returns the address representation of a uint256.
    * @param a The uint256 value to convert to an address.
    * @return The address representation of the provided uint256 value.
    */
    function get(Address a) internal pure returns (address) {
        return address(uint160(Address.unwrap(a) & _LOW_160_BIT_MASK));
    }

    /**
    * @notice Checks if a given flag is set for the provided address.
    * @param a The address to check for the flag.
    * @param flag The flag to check for in the provided address.
    * @return True if the provided flag is set in the address, false otherwise.
    */
    function getFlag(Address a, uint256 flag) internal pure returns (bool) {
        return (Address.unwrap(a) & flag) != 0;
    }

    /**
    * @notice Returns a uint32 value stored at a specific bit offset in the provided address.
    * @param a The address containing the uint32 value.
    * @param offset The bit offset at which the uint32 value is stored.
    * @return The uint32 value stored in the address at the specified bit offset.
    */
    function getUint32(Address a, uint256 offset) internal pure returns (uint32) {
        return uint32(Address.unwrap(a) >> offset);
    }

    /**
    * @notice Returns a uint64 value stored at a specific bit offset in the provided address.
    * @param a The address containing the uint64 value.
    * @param offset The bit offset at which the uint64 value is stored.
    * @return The uint64 value stored in the address at the specified bit offset.
    */
    function getUint64(Address a, uint256 offset) internal pure returns (uint64) {
        return uint64(Address.unwrap(a) >> offset);
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@openzeppelin/contracts/interfaces/IERC1271.sol";

/**
 * @title ECDSA signature operations
 * @notice Provides functions for recovering addresses from signatures and verifying signatures, including support for EIP-2098 compact signatures.
 */
library ECDSA {
    // EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
    // unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
    // the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
    // signatures from current libraries generate a unique signature with an s-value in the lower half order.
    //
    // If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
    // with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
    // vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
    // these malleable signatures as well.
    uint256 private constant _S_BOUNDARY = 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0 + 1;
    uint256 private constant _COMPACT_S_MASK = 0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff;
    uint256 private constant _COMPACT_V_SHIFT = 255;

    /**
     * @notice Recovers the signer's address from the signature.
     * @dev Recovers the address that has signed a hash with `(v, r, s)` signature.
     * @param hash The keccak256 hash of the data signed.
     * @param v The recovery byte of the signature.
     * @param r The first 32 bytes of the signature.
     * @param s The second 32 bytes of the signature.
     * @return signer The address of the signer.
     */
    function recover(
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal view returns (address signer) {
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            if lt(s, _S_BOUNDARY) {
                let ptr := mload(0x40)

                mstore(ptr, hash)
                mstore(add(ptr, 0x20), v)
                mstore(add(ptr, 0x40), r)
                mstore(add(ptr, 0x60), s)
                mstore(0, 0)
                pop(staticcall(gas(), 0x1, ptr, 0x80, 0, 0x20))
                signer := mload(0)
            }
        }
    }

    /**
     * @notice Recovers the signer's address from the signature using `r` and `vs` components.
     * @dev Recovers the address that has signed a hash with `r` and `vs`, where `vs` combines `v` and `s`.
     * @param hash The keccak256 hash of the data signed.
     * @param r The first 32 bytes of the signature.
     * @param vs The combined `v` and `s` values of the signature.
     * @return signer The address of the signer.
     */
    function recover(
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal view returns (address signer) {
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let s := and(vs, _COMPACT_S_MASK)
            if lt(s, _S_BOUNDARY) {
                let ptr := mload(0x40)

                mstore(ptr, hash)
                mstore(add(ptr, 0x20), add(27, shr(_COMPACT_V_SHIFT, vs)))
                mstore(add(ptr, 0x40), r)
                mstore(add(ptr, 0x60), s)
                mstore(0, 0)
                pop(staticcall(gas(), 0x1, ptr, 0x80, 0, 0x20))
                signer := mload(0)
            }
        }
    }

    /**
     * @notice Recovers the signer's address from a hash and a signature.
     * @param hash The keccak256 hash of the signed data.
     * @param signature The full signature from which the signer will be recovered.
     * @return signer The address of the signer.
     */
    /// @dev WARNING!!!
    /// There is a known signature malleability issue with two representations of signatures!
    /// Even though this function is able to verify both standard 65-byte and compact 64-byte EIP-2098 signatures
    /// one should never use raw signatures for any kind of invalidation logic in their code.
    /// As the standard and compact representations are interchangeable any invalidation logic that relies on
    /// signature uniqueness will get rekt.
    /// More info: https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4h98-2769-gh6h
    function recover(bytes32 hash, bytes calldata signature) internal view returns (address signer) {
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            // memory[ptr:ptr+0x80] = (hash, v, r, s)
            switch signature.length
            case 65 {
                // memory[ptr+0x20:ptr+0x80] = (v, r, s)
                mstore(add(ptr, 0x20), byte(0, calldataload(add(signature.offset, 0x40))))
                calldatacopy(add(ptr, 0x40), signature.offset, 0x40)
            }
            case 64 {
                // memory[ptr+0x20:ptr+0x80] = (v, r, s)
                let vs := calldataload(add(signature.offset, 0x20))
                mstore(add(ptr, 0x20), add(27, shr(_COMPACT_V_SHIFT, vs)))
                calldatacopy(add(ptr, 0x40), signature.offset, 0x20)
                mstore(add(ptr, 0x60), and(vs, _COMPACT_S_MASK))
            }
            default {
                ptr := 0
            }

            if ptr {
                if lt(mload(add(ptr, 0x60)), _S_BOUNDARY) {
                    // memory[ptr:ptr+0x20] = (hash)
                    mstore(ptr, hash)

                    mstore(0, 0)
                    pop(staticcall(gas(), 0x1, ptr, 0x80, 0, 0x20))
                    signer := mload(0)
                }
            }
        }
    }

    /**
     * @notice Verifies the signature for a hash, either by recovering the signer or using EIP-1271's `isValidSignature` function.
     * @dev Attempts to recover the signer's address from the signature; if the address is non-zero, checks if it's valid according to EIP-1271.
     * @param signer The address to validate the signature against.
     * @param hash The hash of the signed data.
     * @param signature The signature to verify.
     * @return success True if the signature is verified, false otherwise.
     */
    function recoverOrIsValidSignature(
        address signer,
        bytes32 hash,
        bytes calldata signature
    ) internal view returns (bool success) {
        if (signer == address(0)) return false;
        if ((signature.length == 64 || signature.length == 65) && recover(hash, signature) == signer) {
            return true;
        }
        return isValidSignature(signer, hash, signature);
    }

    /**
     * @notice Verifies the signature for a hash, either by recovering the signer or using EIP-1271's `isValidSignature` function.
     * @dev Attempts to recover the signer's address from the signature; if the address is non-zero, checks if it's valid according to EIP-1271.
     * @param signer The address to validate the signature against.
     * @param hash The hash of the signed data.
     * @param v The recovery byte of the signature.
     * @param r The first 32 bytes of the signature.
     * @param s The second 32 bytes of the signature.
     * @return success True if the signature is verified, false otherwise.
     */
    function recoverOrIsValidSignature(
        address signer,
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal view returns (bool success) {
        if (signer == address(0)) return false;
        if (recover(hash, v, r, s) == signer) {
            return true;
        }
        return isValidSignature(signer, hash, v, r, s);
    }

    /**
     * @notice Verifies the signature for a hash, either by recovering the signer or using EIP-1271's `isValidSignature` function.
     * @dev Attempts to recover the signer's address from the signature; if the address is non-zero, checks if it's valid according to EIP-1271.
     * @param signer The address to validate the signature against.
     * @param hash The hash of the signed data.
     * @param r The first 32 bytes of the signature.
     * @param vs The combined `v` and `s` values of the signature.
     * @return success True if the signature is verified, false otherwise.
     */
    function recoverOrIsValidSignature(
        address signer,
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal view returns (bool success) {
        if (signer == address(0)) return false;
        if (recover(hash, r, vs) == signer) {
            return true;
        }
        return isValidSignature(signer, hash, r, vs);
    }

    /**
     * @notice Verifies the signature for a given hash, attempting to recover the signer's address or validates it using EIP-1271 for 65-byte signatures.
     * @dev Attempts to recover the signer's address from the signature. If the address is a contract, checks if the signature is valid according to EIP-1271.
     * @param signer The expected signer's address.
     * @param hash The keccak256 hash of the signed data.
     * @param r The first 32 bytes of the signature.
     * @param vs The last 32 bytes of the signature, with the last byte being the recovery id.
     * @return success True if the signature is valid, false otherwise.
     */
    function recoverOrIsValidSignature65(
        address signer,
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal view returns (bool success) {
        if (signer == address(0)) return false;
        if (recover(hash, r, vs) == signer) {
            return true;
        }
        return isValidSignature65(signer, hash, r, vs);
    }

    /**
     * @notice Validates a signature for a hash using EIP-1271, if `signer` is a contract.
     * @dev Makes a static call to `signer` with `isValidSignature` function selector from EIP-1271.
     * @param signer The address of the signer to validate against, which could be an EOA or a contract.
     * @param hash The hash of the signed data.
     * @param signature The signature to validate.
     * @return success True if the signature is valid according to EIP-1271, false otherwise.
     */
    function isValidSignature(
        address signer,
        bytes32 hash,
        bytes calldata signature
    ) internal view returns (bool success) {
        // (bool success, bytes memory data) = signer.staticcall(abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, signature));
        // return success && data.length == 32 && abi.decode(data, (bytes4)) == IERC1271.isValidSignature.selector;
        bytes4 selector = IERC1271.isValidSignature.selector;
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            mstore(ptr, selector)
            mstore(add(ptr, 0x04), hash)
            mstore(add(ptr, 0x24), 0x40)
            mstore(add(ptr, 0x44), signature.length)
            calldatacopy(add(ptr, 0x64), signature.offset, signature.length)
            if staticcall(gas(), signer, ptr, add(0x64, signature.length), 0, 0x20) {
                success := and(eq(selector, mload(0)), eq(returndatasize(), 0x20))
            }
        }
    }

    /**
     * @notice Validates a signature for a hash using EIP-1271, if `signer` is a contract.
     * @dev Makes a static call to `signer` with `isValidSignature` function selector from EIP-1271.
     * @param signer The address of the signer to validate against, which could be an EOA or a contract.
     * @param hash The hash of the signed data.
     * @param v The recovery byte of the signature.
     * @param r The first 32 bytes of the signature.
     * @param s The second 32 bytes of the signature.
     * @return success True if the signature is valid according to EIP-1271, false otherwise.
     */
    function isValidSignature(
        address signer,
        bytes32 hash,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal view returns (bool success) {
        bytes4 selector = IERC1271.isValidSignature.selector;
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            mstore(ptr, selector)
            mstore(add(ptr, 0x04), hash)
            mstore(add(ptr, 0x24), 0x40)
            mstore(add(ptr, 0x44), 65)
            mstore(add(ptr, 0x64), r)
            mstore(add(ptr, 0x84), s)
            mstore8(add(ptr, 0xa4), v)
            if staticcall(gas(), signer, ptr, 0xa5, 0, 0x20) {
                success := and(eq(selector, mload(0)), eq(returndatasize(), 0x20))
            }
        }
    }

    /**
     * @notice Validates a signature for a hash using EIP-1271, if `signer` is a contract.
     * @dev Makes a static call to `signer` with `isValidSignature` function selector from EIP-1271.
     * @param signer The address of the signer to validate against, which could be an EOA or a contract.
     * @param hash The hash of the signed data.
     * @param r The first 32 bytes of the signature.
     * @param vs The last 32 bytes of the signature, with the last byte being the recovery id.
     * @return success True if the signature is valid according to EIP-1271, false otherwise.
     */
    function isValidSignature(
        address signer,
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal view returns (bool success) {
        // (bool success, bytes memory data) = signer.staticcall(abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, abi.encodePacked(r, vs)));
        // return success && data.length == 32 && abi.decode(data, (bytes4)) == IERC1271.isValidSignature.selector;
        bytes4 selector = IERC1271.isValidSignature.selector;
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            mstore(ptr, selector)
            mstore(add(ptr, 0x04), hash)
            mstore(add(ptr, 0x24), 0x40)
            mstore(add(ptr, 0x44), 64)
            mstore(add(ptr, 0x64), r)
            mstore(add(ptr, 0x84), vs)
            if staticcall(gas(), signer, ptr, 0xa4, 0, 0x20) {
                success := and(eq(selector, mload(0)), eq(returndatasize(), 0x20))
            }
        }
    }

    /**
     * @notice Verifies if a 65-byte signature is valid for a given hash, according to EIP-1271.
     * @param signer The address of the signer to validate against, which could be an EOA or a contract.
     * @param hash The hash of the signed data.
     * @param r The first 32 bytes of the signature.
     * @param vs The combined `v` (recovery id) and `s` component of the signature, packed into the last 32 bytes.
     * @return success True if the signature is valid according to EIP-1271, false otherwise.
     */
    function isValidSignature65(
        address signer,
        bytes32 hash,
        bytes32 r,
        bytes32 vs
    ) internal view returns (bool success) {
        // (bool success, bytes memory data) = signer.staticcall(abi.encodeWithSelector(IERC1271.isValidSignature.selector, hash, abi.encodePacked(r, vs & ~uint256(1 << 255), uint8(vs >> 255))));
        // return success && data.length == 32 && abi.decode(data, (bytes4)) == IERC1271.isValidSignature.selector;
        bytes4 selector = IERC1271.isValidSignature.selector;
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            mstore(ptr, selector)
            mstore(add(ptr, 0x04), hash)
            mstore(add(ptr, 0x24), 0x40)
            mstore(add(ptr, 0x44), 65)
            mstore(add(ptr, 0x64), r)
            mstore(add(ptr, 0x84), and(vs, _COMPACT_S_MASK))
            mstore8(add(ptr, 0xa4), add(27, shr(_COMPACT_V_SHIFT, vs)))
            if staticcall(gas(), signer, ptr, 0xa5, 0, 0x20) {
                success := and(eq(selector, mload(0)), eq(returndatasize(), 0x20))
            }
        }
    }

    /**
     * @notice Generates a hash compatible with Ethereum's signed message format.
     * @dev Prepends the hash with Ethereum's message prefix before hashing it.
     * @param hash The hash of the data to sign.
     * @return res The Ethereum signed message hash.
     */
    function toEthSignedMessageHash(bytes32 hash) internal pure returns (bytes32 res) {
        // 32 is the length in bytes of hash, enforced by the type signature above
        // return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", hash));
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            mstore(0, 0x19457468657265756d205369676e6564204d6573736167653a0a333200000000) // "\x19Ethereum Signed Message:\n32"
            mstore(28, hash)
            res := keccak256(0, 60)
        }
    }

    /**
     * @notice Generates an EIP-712 compliant hash.
     * @dev Encodes the domain separator and the struct hash according to EIP-712.
     * @param domainSeparator The EIP-712 domain separator.
     * @param structHash The EIP-712 struct hash.
     * @return res The EIP-712 compliant hash.
     */
    function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 res) {
        // return keccak256(abi.encodePacked("\x19\x01", domainSeparator, structHash));
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)
            mstore(ptr, 0x1901000000000000000000000000000000000000000000000000000000000000) // "\x19\x01"
            mstore(add(ptr, 0x02), domainSeparator)
            mstore(add(ptr, 0x22), structHash)
            res := keccak256(ptr, 66)
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.1.0) (interfaces/IERC1271.sol)

pragma solidity ^0.8.20;

/**
 * @dev Interface of the ERC-1271 standard signature validation method for
 * contracts as defined in https://eips.ethereum.org/EIPS/eip-1271[ERC-1271].
 */
interface IERC1271 {
    /**
     * @dev Should return whether the signature provided is valid for the provided data
     * @param hash      Hash of the data to be signed
     * @param signature Signature byte array associated with _data
     */
    function isValidSignature(bytes32 hash, bytes memory signature) external view returns (bytes4 magicValue);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./IOrderMixin.sol";

interface IAmountGetter {
    /**
     * @notice View method that gets called to determine the actual making amount
     * @param order Order being processed
     * @param extension Order extension data
     * @param orderHash Hash of the order being processed
     * @param taker Taker address
     * @param takingAmount Actual taking amount
     * @param remainingMakingAmount Order remaining making amount
     * @param extraData Extra data
     */
    function getMakingAmount(
        IOrderMixin.Order calldata order,
        bytes calldata extension,
        bytes32 orderHash,
        address taker,
        uint256 takingAmount,
        uint256 remainingMakingAmount,
        bytes calldata extraData
    ) external view returns (uint256);

    /**
     * @notice View method that gets called to determine the actual making amount
     * @param order Order being processed
     * @param extension Order extension data
     * @param orderHash Hash of the order being processed
     * @param taker Taker address
     * @param makingAmount Actual taking amount
     * @param remainingMakingAmount Order remaining making amount
     * @param extraData Extra data
     */
    function getTakingAmount(
        IOrderMixin.Order calldata order,
        bytes calldata extension,
        bytes32 orderHash,
        address taker,
        uint256 makingAmount,
        uint256 remainingMakingAmount,
        bytes calldata extraData
    ) external view returns (uint256);
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "@1inch/solidity-utils/contracts/libraries/AddressLib.sol";
import "../libraries/MakerTraitsLib.sol";
import "../libraries/TakerTraitsLib.sol";

interface IOrderMixin {
    struct Order {
        uint256 salt;
        Address maker;
        Address receiver;
        Address makerAsset;
        Address takerAsset;
        uint256 makingAmount;
        uint256 takingAmount;
        MakerTraits makerTraits;
    }

    error InvalidatedOrder();
    error TakingAmountExceeded();
    error PrivateOrder();
    error BadSignature();
    error OrderExpired();
    error WrongSeriesNonce();
    error SwapWithZeroAmount();
    error PartialFillNotAllowed();
    error OrderIsNotSuitableForMassInvalidation();
    error EpochManagerAndBitInvalidatorsAreIncompatible();
    error ReentrancyDetected();
    error PredicateIsNotTrue();
    error TakingAmountTooHigh();
    error MakingAmountTooLow();
    error TransferFromMakerToTakerFailed();
    error TransferFromTakerToMakerFailed();
    error MismatchArraysLengths();
    error InvalidPermit2Transfer();
    error SimulationResults(bool success, bytes res);

    /**
     * @notice Emitted when order gets filled
     * @param orderHash Hash of the order
     * @param remainingAmount Amount of the maker asset that remains to be filled
     */
    event OrderFilled(
        bytes32 orderHash,
        uint256 remainingAmount
    );

    /**
     * @notice Emitted when order without `useBitInvalidator` gets cancelled
     * @param orderHash Hash of the order
     */
    event OrderCancelled(
        bytes32 orderHash
    );

    /**
     * @notice Emitted when order with `useBitInvalidator` gets cancelled
     * @param maker Maker address
     * @param slotIndex Slot index that was updated
     * @param slotValue New slot value
     */
    event BitInvalidatorUpdated(
        address indexed maker,
        uint256 slotIndex,
        uint256 slotValue
    );

    /**
     * @notice Returns bitmask for double-spend invalidators based on lowest byte of order.info and filled quotes
     * @param maker Maker address
     * @param slot Slot number to return bitmask for
     * @return result Each bit represents whether corresponding was already invalidated
     */
    function bitInvalidatorForOrder(address maker, uint256 slot) external view returns(uint256 result);

    /**
     * @notice Returns bitmask for double-spend invalidators based on lowest byte of order.info and filled quotes
     * @param orderHash Hash of the order
     * @return remaining Remaining amount of the order
     */
    function remainingInvalidatorForOrder(address maker, bytes32 orderHash) external view returns(uint256 remaining);

    /**
     * @notice Returns bitmask for double-spend invalidators based on lowest byte of order.info and filled quotes
     * @param orderHash Hash of the order
     * @return remainingRaw Inverse of the remaining amount of the order if order was filled at least once, otherwise 0
     */
    function rawRemainingInvalidatorForOrder(address maker, bytes32 orderHash) external view returns(uint256 remainingRaw);

    /**
     * @notice Cancels order's quote
     * @param makerTraits Order makerTraits
     * @param orderHash Hash of the order to cancel
     */
    function cancelOrder(MakerTraits makerTraits, bytes32 orderHash) external;

    /**
     * @notice Cancels orders' quotes
     * @param makerTraits Orders makerTraits
     * @param orderHashes Hashes of the orders to cancel
     */
    function cancelOrders(MakerTraits[] calldata makerTraits, bytes32[] calldata orderHashes) external;

    /**
     * @notice Cancels all quotes of the maker (works for bit-invalidating orders only)
     * @param makerTraits Order makerTraits
     * @param additionalMask Additional bitmask to invalidate orders
     */
    function bitsInvalidateForOrder(MakerTraits makerTraits, uint256 additionalMask) external;

    /**
     * @notice Returns order hash, hashed with limit order protocol contract EIP712
     * @param order Order
     * @return orderHash Hash of the order
     */
    function hashOrder(IOrderMixin.Order calldata order) external view returns(bytes32 orderHash);

    /**
     * @notice Delegates execution to custom implementation. Could be used to validate if `transferFrom` works properly
     * @dev The function always reverts and returns the simulation results in revert data.
     * @param target Addresses that will be delegated
     * @param data Data that will be passed to delegatee
     */
    function simulate(address target, bytes calldata data) external;

    /**
     * @notice Fills order's quote, fully or partially (whichever is possible).
     * @param order Order quote to fill
     * @param r R component of signature
     * @param vs VS component of signature
     * @param amount Taker amount to fill
     * @param takerTraits Specifies threshold as maximum allowed takingAmount when takingAmount is zero, otherwise specifies
     * minimum allowed makingAmount. The 2nd (0 based index) highest bit specifies whether taker wants to skip maker's permit.
     * @return makingAmount Actual amount transferred from maker to taker
     * @return takingAmount Actual amount transferred from taker to maker
     * @return orderHash Hash of the filled order
     */
    function fillOrder(
        Order calldata order,
        bytes32 r,
        bytes32 vs,
        uint256 amount,
        TakerTraits takerTraits
    ) external payable returns(uint256 makingAmount, uint256 takingAmount, bytes32 orderHash);

    /**
     * @notice Same as `fillOrder` but allows to specify arguments that are used by the taker.
     * @param order Order quote to fill
     * @param r R component of signature
     * @param vs VS component of signature
     * @param amount Taker amount to fill
     * @param takerTraits Specifies threshold as maximum allowed takingAmount when takingAmount is zero, otherwise specifies
     * minimum allowed makingAmount. The 2nd (0 based index) highest bit specifies whether taker wants to skip maker's permit.
     * @param args Arguments that are used by the taker (target, extension, interaction, permit)
     * @return makingAmount Actual amount transferred from maker to taker
     * @return takingAmount Actual amount transferred from taker to maker
     * @return orderHash Hash of the filled order
     */
    function fillOrderArgs(
        IOrderMixin.Order calldata order,
        bytes32 r,
        bytes32 vs,
        uint256 amount,
        TakerTraits takerTraits,
        bytes calldata args
    ) external payable returns(uint256 makingAmount, uint256 takingAmount, bytes32 orderHash);

    /**
     * @notice Same as `fillOrder` but uses contract-based signatures.
     * @param order Order quote to fill
     * @param signature Signature to confirm quote ownership
     * @param amount Taker amount to fill
     * @param takerTraits Specifies threshold as maximum allowed takingAmount when takingAmount is zero, otherwise specifies
     * minimum allowed makingAmount. The 2nd (0 based index) highest bit specifies whether taker wants to skip maker's permit.
     * @return makingAmount Actual amount transferred from maker to taker
     * @return takingAmount Actual amount transferred from taker to maker
     * @return orderHash Hash of the filled order
     * @dev See tests for examples
     */
    function fillContractOrder(
        Order calldata order,
        bytes calldata signature,
        uint256 amount,
        TakerTraits takerTraits
    ) external returns(uint256 makingAmount, uint256 takingAmount, bytes32 orderHash);

    /**
     * @notice Same as `fillContractOrder` but allows to specify arguments that are used by the taker.
     * @param order Order quote to fill
     * @param signature Signature to confirm quote ownership
     * @param amount Taker amount to fill
     * @param takerTraits Specifies threshold as maximum allowed takingAmount when takingAmount is zero, otherwise specifies
     * minimum allowed makingAmount. The 2nd (0 based index) highest bit specifies whether taker wants to skip maker's permit.
     * @param args Arguments that are used by the taker (target, extension, interaction, permit)
     * @return makingAmount Actual amount transferred from maker to taker
     * @return takingAmount Actual amount transferred from taker to maker
     * @return orderHash Hash of the filled order
     * @dev See tests for examples
     */
    function fillContractOrderArgs(
        Order calldata order,
        bytes calldata signature,
        uint256 amount,
        TakerTraits takerTraits,
        bytes calldata args
    ) external returns(uint256 makingAmount, uint256 takingAmount, bytes32 orderHash);
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

import { IOrderMixin } from "./IOrderMixin.sol";

/**
 * @title IOrderRegistrator
 * @dev The interface defines the structure of the order registrator contract.
 * The registrator is responsible for registering orders and emitting an event when an order is registered.
 */
interface IOrderRegistrator {
    /**
     * @notice Emitted when an order is registered.
     * @param order The order that was registered.
     * @param extension The extension data associated with the order.
     * @param signature The signature of the order.
     */
    event OrderRegistered(IOrderMixin.Order order, bytes extension, bytes signature);

    /**
     * @notice Registers an order.
     * @param order The order to be registered.
     * @param extension The extension data associated with the order.
     * @param signature The signature of the order.
     */
    function registerOrder(IOrderMixin.Order calldata order, bytes calldata extension, bytes calldata signature) external;
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

/// @title The helper library to calculate linearly taker amount from maker amount and vice versa.
library AmountCalculatorLib {
    /// @notice Calculates maker amount
    /// @return Result Floored maker amount
    function getMakingAmount(uint256 orderMakerAmount, uint256 orderTakerAmount, uint256 swapTakerAmount) internal pure returns(uint256) {
        if ((swapTakerAmount | orderMakerAmount) >> 128 == 0) {
            unchecked {
                return (swapTakerAmount * orderMakerAmount) / orderTakerAmount;
            }
        }
        return swapTakerAmount * orderMakerAmount / orderTakerAmount;
    }

    /// @notice Calculates taker amount
    /// @return Result Ceiled taker amount
    function getTakingAmount(uint256 orderMakerAmount, uint256 orderTakerAmount, uint256 swapMakerAmount) internal pure returns(uint256) {
        if ((swapMakerAmount | orderTakerAmount) >> 128 == 0) {
            unchecked {
                return (swapMakerAmount * orderTakerAmount + orderMakerAmount - 1) / orderMakerAmount;
            }
        }
        return (swapMakerAmount * orderTakerAmount + orderMakerAmount - 1) / orderMakerAmount;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "../interfaces/IOrderMixin.sol";
import "./OffsetsLib.sol";

/**
 * @title ExtensionLib
 * @notice Library for retrieving extensions information for the IOrderMixin Interface.
 */
library ExtensionLib {
    using AddressLib for Address;
    using OffsetsLib for Offsets;

    enum DynamicField {
        MakerAssetSuffix,
        TakerAssetSuffix,
        MakingAmountData,
        TakingAmountData,
        Predicate,
        MakerPermit,
        PreInteractionData,
        PostInteractionData,
        CustomData
    }

    /**
     * @notice Returns the MakerAssetSuffix from the provided extension calldata.
     * @param extension The calldata from which the MakerAssetSuffix is to be retrieved.
     * @return calldata Bytes representing the MakerAssetSuffix.
     */
    function makerAssetSuffix(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.MakerAssetSuffix);
    }

    /**
     * @notice Returns the TakerAssetSuffix from the provided extension calldata.
     * @param extension The calldata from which the TakerAssetSuffix is to be retrieved.
     * @return calldata Bytes representing the TakerAssetSuffix.
     */
    function takerAssetSuffix(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.TakerAssetSuffix);
    }

    /**
     * @notice Returns the MakingAmountData from the provided extension calldata.
     * @param extension The calldata from which the MakingAmountData is to be retrieved.
     * @return calldata Bytes representing the MakingAmountData.
     */
    function makingAmountData(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.MakingAmountData);
    }

    /**
     * @notice Returns the TakingAmountData from the provided extension calldata.
     * @param extension The calldata from which the TakingAmountData is to be retrieved.
     * @return calldata Bytes representing the TakingAmountData.
     */
    function takingAmountData(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.TakingAmountData);
    }

    /**
     * @notice Returns the order's predicate from the provided extension calldata.
     * @param extension The calldata from which the predicate is to be retrieved.
     * @return calldata Bytes representing the predicate.
     */
    function predicate(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.Predicate);
    }

    /**
     * @notice Returns the maker's permit from the provided extension calldata.
     * @param extension The calldata from which the maker's permit is to be retrieved.
     * @return calldata Bytes representing the maker's permit.
     */
    function makerPermit(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.MakerPermit);
    }


    /**
     * @notice Returns the pre-interaction from the provided extension calldata.
     * @param extension The calldata from which the pre-interaction is to be retrieved.
     * @return calldata Bytes representing the pre-interaction.
     */
    function preInteractionTargetAndData(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.PreInteractionData);
    }

    /**
     * @notice Returns the post-interaction from the provided extension calldata.
     * @param extension The calldata from which the post-interaction is to be retrieved.
     * @return calldata Bytes representing the post-interaction.
     */
    function postInteractionTargetAndData(bytes calldata extension) internal pure returns(bytes calldata) {
        return _get(extension, DynamicField.PostInteractionData);
    }

    /**
     * @notice Returns extra suffix data from the provided extension calldata.
     * @param extension The calldata from which the extra suffix data is to be retrieved.
     * @return calldata Bytes representing the extra suffix data.
     */
    function customData(bytes calldata extension) internal pure returns(bytes calldata) {
        if (extension.length < 0x20) return msg.data[:0];
        uint256 offsets = uint256(bytes32(extension));
        unchecked {
            return extension[0x20 + (offsets >> 224):];
        }
    }

    /**
     * @notice Retrieves a specific field from the provided extension calldata.
     * @dev The first 32 bytes of an extension calldata contain offsets to the end of each field within the calldata.
     * @param extension The calldata from which the field is to be retrieved.
     * @param field The specific dynamic field to retrieve from the extension.
     * @return calldata Bytes representing the requested field.
     */
    function _get(bytes calldata extension, DynamicField field) private pure returns(bytes calldata) {
        if (extension.length < 0x20) return msg.data[:0];

        Offsets offsets;
        bytes calldata concat;
        assembly ("memory-safe") {  // solhint-disable-line no-inline-assembly
            offsets := calldataload(extension.offset)
            concat.offset := add(extension.offset, 0x20)
            concat.length := sub(extension.length, 0x20)
        }

        return offsets.get(concat, uint256(field));
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

type MakerTraits is uint256;

/**
 * @title MakerTraitsLib
 * @notice A library to manage and check MakerTraits, which are used to encode the maker's preferences for an order in a single uint256.
 * @dev
 * The MakerTraits type is a uint256 and different parts of the number are used to encode different traits.
 * High bits are used for flags
 * 255 bit `NO_PARTIAL_FILLS_FLAG`          - if set, the order does not allow partial fills
 * 254 bit `ALLOW_MULTIPLE_FILLS_FLAG`      - if set, the order permits multiple fills
 * 253 bit                                  - unused
 * 252 bit `PRE_INTERACTION_CALL_FLAG`      - if set, the order requires pre-interaction call
 * 251 bit `POST_INTERACTION_CALL_FLAG`     - if set, the order requires post-interaction call
 * 250 bit `NEED_CHECK_EPOCH_MANAGER_FLAG`  - if set, the order requires to check the epoch manager
 * 249 bit `HAS_EXTENSION_FLAG`             - if set, the order has extension(s)
 * 248 bit `USE_PERMIT2_FLAG`               - if set, the order uses permit2
 * 247 bit `UNWRAP_WETH_FLAG`               - if set, the order requires to unwrap WETH

 * Low 200 bits are used for allowed sender, expiration, nonceOrEpoch, and series
 * uint80 last 10 bytes of allowed sender address (0 if any)
 * uint40 expiration timestamp (0 if none)
 * uint40 nonce or epoch
 * uint40 series
 */
library MakerTraitsLib {
    // Low 200 bits are used for allowed sender, expiration, nonceOrEpoch, and series
    uint256 private constant _ALLOWED_SENDER_MASK = type(uint80).max;
    uint256 private constant _EXPIRATION_OFFSET = 80;
    uint256 private constant _EXPIRATION_MASK = type(uint40).max;
    uint256 private constant _NONCE_OR_EPOCH_OFFSET = 120;
    uint256 private constant _NONCE_OR_EPOCH_MASK = type(uint40).max;
    uint256 private constant _SERIES_OFFSET = 160;
    uint256 private constant _SERIES_MASK = type(uint40).max;

    uint256 private constant _NO_PARTIAL_FILLS_FLAG = 1 << 255;
    uint256 private constant _ALLOW_MULTIPLE_FILLS_FLAG = 1 << 254;
    uint256 private constant _PRE_INTERACTION_CALL_FLAG = 1 << 252;
    uint256 private constant _POST_INTERACTION_CALL_FLAG = 1 << 251;
    uint256 private constant _NEED_CHECK_EPOCH_MANAGER_FLAG = 1 << 250;
    uint256 private constant _HAS_EXTENSION_FLAG = 1 << 249;
    uint256 private constant _USE_PERMIT2_FLAG = 1 << 248;
    uint256 private constant _UNWRAP_WETH_FLAG = 1 << 247;

    /**
     * @notice Checks if the order has the extension flag set.
     * @dev If the `HAS_EXTENSION_FLAG` is set in the makerTraits, then the protocol expects that the order has extension(s).
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the flag is set.
     */
    function hasExtension(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _HAS_EXTENSION_FLAG) != 0;
    }

    /**
     * @notice Checks if the maker allows a specific taker to fill the order.
     * @param makerTraits The traits of the maker.
     * @param sender The address of the taker to be checked.
     * @return result A boolean indicating whether the taker is allowed.
     */
    function isAllowedSender(MakerTraits makerTraits, address sender) internal pure returns (bool) {
        uint160 allowedSender = uint160(MakerTraits.unwrap(makerTraits) & _ALLOWED_SENDER_MASK);
        return allowedSender == 0 || allowedSender == uint160(sender) & _ALLOWED_SENDER_MASK;
    }

    /**
     * @notice Returns the expiration time of the order.
     * @param makerTraits The traits of the maker.
     * @return result The expiration timestamp of the order.
     */
    function getExpirationTime(MakerTraits makerTraits) internal pure returns (uint256) {
        return (MakerTraits.unwrap(makerTraits) >> _EXPIRATION_OFFSET) & _EXPIRATION_MASK;
    }

    /**
     * @notice Checks if the order has expired.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the order has expired.
     */
    function isExpired(MakerTraits makerTraits) internal view returns (bool) {
        uint256 expiration = getExpirationTime(makerTraits);
        return expiration != 0 && expiration < block.timestamp;  // solhint-disable-line not-rely-on-time
    }

    /**
     * @notice Returns the nonce or epoch of the order.
     * @param makerTraits The traits of the maker.
     * @return result The nonce or epoch of the order.
     */
    function nonceOrEpoch(MakerTraits makerTraits) internal pure returns (uint256) {
        return (MakerTraits.unwrap(makerTraits) >> _NONCE_OR_EPOCH_OFFSET) & _NONCE_OR_EPOCH_MASK;
    }

    /**
     * @notice Returns the series of the order.
     * @param makerTraits The traits of the maker.
     * @return result The series of the order.
     */
    function series(MakerTraits makerTraits) internal pure returns (uint256) {
        return (MakerTraits.unwrap(makerTraits) >> _SERIES_OFFSET) & _SERIES_MASK;
    }

    /**
      * @notice Determines if the order allows partial fills.
      * @dev If the _NO_PARTIAL_FILLS_FLAG is not set in the makerTraits, then the order allows partial fills.
      * @param makerTraits The traits of the maker, determining their preferences for the order.
      * @return result A boolean indicating whether the maker allows partial fills.
      */
    function allowPartialFills(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _NO_PARTIAL_FILLS_FLAG) == 0;
    }

    /**
     * @notice Checks if the maker needs pre-interaction call.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the maker needs a pre-interaction call.
     */
    function needPreInteractionCall(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _PRE_INTERACTION_CALL_FLAG) != 0;
    }

    /**
     * @notice Checks if the maker needs post-interaction call.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the maker needs a post-interaction call.
     */
    function needPostInteractionCall(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _POST_INTERACTION_CALL_FLAG) != 0;
    }

    /**
      * @notice Determines if the order allows multiple fills.
      * @dev If the _ALLOW_MULTIPLE_FILLS_FLAG is set in the makerTraits, then the maker allows multiple fills.
      * @param makerTraits The traits of the maker, determining their preferences for the order.
      * @return result A boolean indicating whether the maker allows multiple fills.
      */
    function allowMultipleFills(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _ALLOW_MULTIPLE_FILLS_FLAG) != 0;
    }

    /**
      * @notice Determines if an order should use the bit invalidator or remaining amount validator.
      * @dev The bit invalidator can be used if the order does not allow partial or multiple fills.
      * @param makerTraits The traits of the maker, determining their preferences for the order.
      * @return result A boolean indicating whether the bit invalidator should be used.
      * True if the order requires the use of the bit invalidator.
      */
    function useBitInvalidator(MakerTraits makerTraits) internal pure returns (bool) {
        return !allowPartialFills(makerTraits) || !allowMultipleFills(makerTraits);
    }

    /**
     * @notice Checks if the maker needs to check the epoch.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the maker needs to check the epoch manager.
     */
    function needCheckEpochManager(MakerTraits makerTraits) internal pure returns (bool) {
        return (MakerTraits.unwrap(makerTraits) & _NEED_CHECK_EPOCH_MANAGER_FLAG) != 0;
    }

    /**
     * @notice Checks if the maker uses permit2.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the maker uses permit2.
     */
    function usePermit2(MakerTraits makerTraits) internal pure returns (bool) {
        return MakerTraits.unwrap(makerTraits) & _USE_PERMIT2_FLAG != 0;
    }

    /**
     * @notice Checks if the maker needs to unwraps WETH.
     * @param makerTraits The traits of the maker.
     * @return result A boolean indicating whether the maker needs to unwrap WETH.
     */
    function unwrapWeth(MakerTraits makerTraits) internal pure returns (bool) {
        return MakerTraits.unwrap(makerTraits) & _UNWRAP_WETH_FLAG != 0;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

type Offsets is uint256;

/// @title OffsetsLib
/// @dev A library for retrieving values by offsets from a concatenated calldata.
library OffsetsLib {

    /// @dev Error to be thrown when the offset is out of bounds.
    error OffsetOutOfBounds();

    /**
     * @notice Retrieves the field value calldata corresponding to the provided field index from the concatenated calldata.
     * @dev 
     * The function performs the following steps:
     * 1. Retrieve the start and end of the segment corresponding to the provided index from the offsets array.
     * 2. Get the value from segment using offset and length calculated based on the start and end of the segment.
     * 3. Throw `OffsetOutOfBounds` error if the length of the segment is greater than the length of the concatenated data.
     * @param offsets The offsets encoding the start and end of each segment within the concatenated calldata.
     * @param concat The concatenated calldata.
     * @param index The index of the segment to retrieve. The field index 0 corresponds to the lowest bytes of the offsets array.
     * @return result The calldata from a segment of the concatenated calldata corresponding to the provided index.
     */
    function get(Offsets offsets, bytes calldata concat, uint256 index) internal pure returns(bytes calldata result) {
        bytes4 exception = OffsetOutOfBounds.selector;
        assembly ("memory-safe") {  // solhint-disable-line no-inline-assembly
            let bitShift := shl(5, index)                                   // bitShift = index * 32
            let begin := and(0xffffffff, shr(bitShift, shl(32, offsets)))   // begin = offsets[ bitShift : bitShift + 32 ]
            let end := and(0xffffffff, shr(bitShift, offsets))              // end   = offsets[ bitShift + 32 : bitShift + 64 ]
            result.offset := add(concat.offset, begin)
            result.length := sub(end, begin)
            if gt(end, concat.length) {
                mstore(0, exception)
                revert(0, 4)
            }
        }
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

type TakerTraits is uint256;

/**
 * @title TakerTraitsLib
 * @notice This library to manage and check TakerTraits, which are used to encode the taker's preferences for an order in a single uint256.
 * @dev The TakerTraits are structured as follows:
 * High bits are used for flags
 * 255 bit `_MAKER_AMOUNT_FLAG`           - If set, the taking amount is calculated based on making amount, otherwise making amount is calculated based on taking amount.
 * 254 bit `_UNWRAP_WETH_FLAG`            - If set, the WETH will be unwrapped into ETH before sending to taker.
 * 253 bit `_SKIP_ORDER_PERMIT_FLAG`      - If set, the order skips maker's permit execution.
 * 252 bit `_USE_PERMIT2_FLAG`            - If set, the order uses the permit2 function for authorization.
 * 251 bit `_ARGS_HAS_TARGET`             - If set, then first 20 bytes of args are treated as target address for maker’s funds transfer.
 * 224-247 bits `ARGS_EXTENSION_LENGTH`   - The length of the extension calldata in the args.
 * 200-223 bits `ARGS_INTERACTION_LENGTH` - The length of the interaction calldata in the args.
 * 0-184 bits                             - The threshold amount (the maximum amount a taker agrees to give in exchange for a making amount).
 */
library TakerTraitsLib {
    uint256 private constant _MAKER_AMOUNT_FLAG = 1 << 255;
    uint256 private constant _UNWRAP_WETH_FLAG = 1 << 254;
    uint256 private constant _SKIP_ORDER_PERMIT_FLAG = 1 << 253;
    uint256 private constant _USE_PERMIT2_FLAG = 1 << 252;
    uint256 private constant _ARGS_HAS_TARGET = 1 << 251;

    uint256 private constant _ARGS_EXTENSION_LENGTH_OFFSET = 224;
    uint256 private constant _ARGS_EXTENSION_LENGTH_MASK = 0xffffff;
    uint256 private constant _ARGS_INTERACTION_LENGTH_OFFSET = 200;
    uint256 private constant _ARGS_INTERACTION_LENGTH_MASK = 0xffffff;

    uint256 private constant _AMOUNT_MASK = 0x000000000000000000ffffffffffffffffffffffffffffffffffffffffffffff;

    /**
     * @notice Checks if the args should contain target address.
     * @param takerTraits The traits of the taker.
     * @return result A boolean indicating whether the args should contain target address.
     */
    function argsHasTarget(TakerTraits takerTraits) internal pure returns (bool) {
        return (TakerTraits.unwrap(takerTraits) & _ARGS_HAS_TARGET) != 0;
    }

    /**
     * @notice Retrieves the length of the extension calldata from the takerTraits.
     * @param takerTraits The traits of the taker.
     * @return result The length of the extension calldata encoded in the takerTraits.
     */
    function argsExtensionLength(TakerTraits takerTraits) internal pure returns (uint256) {
        return (TakerTraits.unwrap(takerTraits) >> _ARGS_EXTENSION_LENGTH_OFFSET) & _ARGS_EXTENSION_LENGTH_MASK;
    }

    /**
     * @notice Retrieves the length of the interaction calldata from the takerTraits.
     * @param takerTraits The traits of the taker.
     * @return result The length of the interaction calldata encoded in the takerTraits.
     */
    function argsInteractionLength(TakerTraits takerTraits) internal pure returns (uint256) {
        return (TakerTraits.unwrap(takerTraits) >> _ARGS_INTERACTION_LENGTH_OFFSET) & _ARGS_INTERACTION_LENGTH_MASK;
    }

    /**
     * @notice Checks if the taking amount should be calculated based on making amount.
     * @param takerTraits The traits of the taker.
     * @return result A boolean indicating whether the taking amount should be calculated based on making amount.
     */
    function isMakingAmount(TakerTraits takerTraits) internal pure returns (bool) {
        return (TakerTraits.unwrap(takerTraits) & _MAKER_AMOUNT_FLAG) != 0;
    }

    /**
     * @notice Checks if the order should unwrap WETH and send ETH to taker.
     * @param takerTraits The traits of the taker.
     * @return result A boolean indicating whether the order should unwrap WETH.
     */
    function unwrapWeth(TakerTraits takerTraits) internal pure returns (bool) {
        return (TakerTraits.unwrap(takerTraits) & _UNWRAP_WETH_FLAG) != 0;
    }

    /**
     * @notice Checks if the order should skip maker's permit execution.
     * @param takerTraits The traits of the taker.
     * @return result A boolean indicating whether the order don't apply permit.
     */
    function skipMakerPermit(TakerTraits takerTraits) internal pure returns (bool) {
        return (TakerTraits.unwrap(takerTraits) & _SKIP_ORDER_PERMIT_FLAG) != 0;
    }

    /**
     * @notice Checks if the order uses the permit2 instead of permit.
     * @param takerTraits The traits of the taker.
     * @return result A boolean indicating whether the order uses the permit2.
     */
    function usePermit2(TakerTraits takerTraits) internal pure returns (bool) {
        return (TakerTraits.unwrap(takerTraits) & _USE_PERMIT2_FLAG) != 0;
    }

    /**
     * @notice Retrieves the threshold amount from the takerTraits.
     * The maximum amount a taker agrees to give in exchange for a making amount.
     * @param takerTraits The traits of the taker.
     * @return result The threshold amount encoded in the takerTraits.
     */
    function threshold(TakerTraits takerTraits) internal pure returns (uint256) {
        return TakerTraits.unwrap(takerTraits) & _AMOUNT_MASK;
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.23;

import "@1inch/solidity-utils/contracts/libraries/ECDSA.sol";
import "@1inch/solidity-utils/contracts/libraries/AddressLib.sol";

import "./interfaces/IOrderMixin.sol";
import "./libraries/MakerTraitsLib.sol";
import "./libraries/ExtensionLib.sol";
import "./libraries/AmountCalculatorLib.sol";
import "./interfaces/IAmountGetter.sol";

/**
 * @title OrderLib
 * @dev The library provides common functionality for processing and manipulating limit orders.
 * It provides functionality to calculate and verify order hashes, calculate trade amounts, and validate
 * extension data associated with orders. The library also contains helper methods to get the receiver of
 * an order and call getter functions.
 */
 library OrderLib {
    using AddressLib for Address;
    using MakerTraitsLib for MakerTraits;
    using ExtensionLib for bytes;

    /// @dev Error to be thrown when the extension data of an order is missing.
    error MissingOrderExtension();
    /// @dev Error to be thrown when the order has an unexpected extension.
    error UnexpectedOrderExtension();
    /// @dev Error to be thrown when the order extension hash is invalid.
    error InvalidExtensionHash();

    /// @dev The typehash of the order struct.
    bytes32 constant internal _LIMIT_ORDER_TYPEHASH = keccak256(
        "Order("
            "uint256 salt,"
            "address maker,"
            "address receiver,"
            "address makerAsset,"
            "address takerAsset,"
            "uint256 makingAmount,"
            "uint256 takingAmount,"
            "uint256 makerTraits"
        ")"
    );
    uint256 constant internal _ORDER_STRUCT_SIZE = 0x100;
    uint256 constant internal _DATA_HASH_SIZE = 0x120;

    /**
      * @notice Calculates the hash of an order.
      * @param order The order to be hashed.
      * @param domainSeparator The domain separator to be used for the EIP-712 hashing.
      * @return result The keccak256 hash of the order data.
      */
    function hash(IOrderMixin.Order calldata order, bytes32 domainSeparator) internal pure returns(bytes32 result) {
        bytes32 typehash = _LIMIT_ORDER_TYPEHASH;
        assembly ("memory-safe") { // solhint-disable-line no-inline-assembly
            let ptr := mload(0x40)

            // keccak256(abi.encode(_LIMIT_ORDER_TYPEHASH, order));
            mstore(ptr, typehash)
            calldatacopy(add(ptr, 0x20), order, _ORDER_STRUCT_SIZE)
            result := keccak256(ptr, _DATA_HASH_SIZE)
        }
        result = ECDSA.toTypedDataHash(domainSeparator, result);
    }

    /**
      * @notice Returns the receiver address for an order.
      * @param order The order.
      * @return receiver The address of the receiver, either explicitly defined in the order or the maker's address if not specified.
      */
    function getReceiver(IOrderMixin.Order calldata order) internal pure returns(address /*receiver*/) {
        address receiver = order.receiver.get();
        return receiver != address(0) ? receiver : order.maker.get();
    }

    /**
      * @notice Calculates the making amount based on the requested taking amount.
      * @dev If getter is specified in the extension data, the getter is called to calculate the making amount,
      * otherwise the making amount is calculated linearly.
      * @param order The order.
      * @param extension The extension data associated with the order.
      * @param requestedTakingAmount The amount the taker wants to take.
      * @param remainingMakingAmount The remaining amount of the asset left to fill.
      * @param orderHash The hash of the order.
      * @return makingAmount The amount of the asset the maker receives.
      */
    function calculateMakingAmount(
        IOrderMixin.Order calldata order,
        bytes calldata extension,
        uint256 requestedTakingAmount,
        uint256 remainingMakingAmount,
        bytes32 orderHash
    ) internal view returns(uint256) {
        bytes calldata data = extension.makingAmountData();
        if (data.length == 0) {
            // Linear proportion
            return AmountCalculatorLib.getMakingAmount(order.makingAmount, order.takingAmount, requestedTakingAmount);
        }
        return IAmountGetter(address(bytes20(data))).getMakingAmount(
            order,
            extension,
            orderHash,
            msg.sender,
            requestedTakingAmount,
            remainingMakingAmount,
            data[20:]
        );
    }

    /**
      * @notice Calculates the taking amount based on the requested making amount.
      * @dev If getter is specified in the extension data, the getter is called to calculate the taking amount,
      * otherwise the taking amount is calculated linearly.
      * @param order The order.
      * @param extension The extension data associated with the order.
      * @param requestedMakingAmount The amount the maker wants to receive.
      * @param remainingMakingAmount The remaining amount of the asset left to be filled.
      * @param orderHash The hash of the order.
      * @return takingAmount The amount of the asset the taker takes.
      */
    function calculateTakingAmount(
        IOrderMixin.Order calldata order,
        bytes calldata extension,
        uint256 requestedMakingAmount,
        uint256 remainingMakingAmount,
        bytes32 orderHash
    ) internal view returns(uint256) {
        bytes calldata data = extension.takingAmountData();
        if (data.length == 0) {
            // Linear proportion
            return AmountCalculatorLib.getTakingAmount(order.makingAmount, order.takingAmount, requestedMakingAmount);
        }
        return IAmountGetter(address(bytes20(data))).getTakingAmount(
            order,
            extension,
            orderHash,
            msg.sender,
            requestedMakingAmount,
            remainingMakingAmount,
            data[20:]
        );
    }

    /**
      * @dev Validates the extension associated with an order.
      * @param order The order to validate against.
      * @param extension The extension associated with the order.
      * @return valid True if the extension is valid, false otherwise.
      * @return errorSelector The error selector if the extension is invalid, 0x00000000 otherwise.
      */
    function isValidExtension(IOrderMixin.Order calldata order, bytes calldata extension) internal pure returns(bool, bytes4) {
        if (order.makerTraits.hasExtension()) {
            if (extension.length == 0) return (false, MissingOrderExtension.selector);
            // Lowest 160 bits of the order salt must be equal to the lowest 160 bits of the extension hash
            if (uint256(keccak256(extension)) & type(uint160).max != order.salt & type(uint160).max) return (false, InvalidExtensionHash.selector);
        } else {
            if (extension.length > 0) return (false, UnexpectedOrderExtension.selector);
        }
        return (true, 0x00000000);
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "evmVersion": "shanghai",
  "viaIR": true,
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"contract IOrderMixin","name":"limitOrderProtocol","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"BadSignature","type":"error"},{"anonymous":false,"inputs":[{"components":[{"internalType":"uint256","name":"salt","type":"uint256"},{"internalType":"Address","name":"maker","type":"uint256"},{"internalType":"Address","name":"receiver","type":"uint256"},{"internalType":"Address","name":"makerAsset","type":"uint256"},{"internalType":"Address","name":"takerAsset","type":"uint256"},{"internalType":"uint256","name":"makingAmount","type":"uint256"},{"internalType":"uint256","name":"takingAmount","type":"uint256"},{"internalType":"MakerTraits","name":"makerTraits","type":"uint256"}],"indexed":false,"internalType":"struct IOrderMixin.Order","name":"order","type":"tuple"},{"indexed":false,"internalType":"bytes","name":"extension","type":"bytes"},{"indexed":false,"internalType":"bytes","name":"signature","type":"bytes"}],"name":"OrderRegistered","type":"event"},{"inputs":[{"components":[{"internalType":"uint256","name":"salt","type":"uint256"},{"internalType":"Address","name":"maker","type":"uint256"},{"internalType":"Address","name":"receiver","type":"uint256"},{"internalType":"Address","name":"makerAsset","type":"uint256"},{"internalType":"Address","name":"takerAsset","type":"uint256"},{"internalType":"uint256","name":"makingAmount","type":"uint256"},{"internalType":"uint256","name":"takingAmount","type":"uint256"},{"internalType":"MakerTraits","name":"makerTraits","type":"uint256"}],"internalType":"struct IOrderMixin.Order","name":"order","type":"tuple"},{"internalType":"bytes","name":"extension","type":"bytes"},{"internalType":"bytes","name":"signature","type":"bytes"}],"name":"registerOrder","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000111111125421ca6dc452d289314280a0f8842a65

-----Decoded View---------------
Arg [0] : limitOrderProtocol (address): 0x111111125421cA6dc452d289314280a0f8842A65

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000111111125421ca6dc452d289314280a0f8842a65