// SPDX-License-Identifier: MIT
pragma solidity ^0.8.13;

/*
 * -------------------------- Disambiguation & Other Notes ---------------------
 *    - The term "head" is used as it is in the documentation for ABI encoding,
 *      but only in reference to dynamic types, i.e. it always refers to the
 *      offset or pointer to the body of a dynamic type. In calldata, the head
 *      is always an offset (relative to the parent object), while in memory,
 *      the head is always the pointer to the body. More information found here:
 *      https://docs.soliditylang.org/en/v0.8.17/abi-spec.html#argument-encoding
 *        - Note that the length of an array is separate from and precedes the
 *          head of the array.
 *
 *    - The term "body" is used in place of the term "head" used in the ABI
 *      documentation. It refers to the start of the data for a dynamic type,
 *      e.g. the first word of a struct or the first word of the first element
 *      in an array.
 *
 *    - The term "pointer" is used to describe the absolute position of a value
 *      and never an offset relative to another value.
 *        - The suffix "_ptr" refers to a memory pointer.
 *        - The suffix "_cdPtr" refers to a calldata pointer.
 *
 *    - The term "offset" is used to describe the position of a value relative
 *      to some parent value. For example, OrderParameters_conduit_offset is the
 *      offset to the "conduit" value in the OrderParameters struct relative to
 *      the start of the body.
 *        - Note: Offsets are used to derive pointers.
 *
 *    - Some structs have pointers defined for all of their fields in this file.
 *      Lines which are commented out are fields that are not used in the
 *      codebase but have been left in for readability.
 */

// Declare constants for name, version, and reentrancy sentinel values.

// Name is right padded, so it touches the length which is left padded. This
// enables writing both values at once. Length goes at byte 95 in memory, and
// name fills bytes 96-109, so both values can be written left-padded to 77.
uint256 constant NameLengthPtr = 0x4D;
uint256 constant NameWithLength = 0x0d436F6E73696465726174696F6E;

uint256 constant information_version_offset = 0;
uint256 constant information_version_cd_offset = 0x60;
uint256 constant information_domainSeparator_offset = 0x20;
uint256 constant information_conduitController_offset = 0x40;
uint256 constant information_versionLengthPtr = 0x63;
uint256 constant information_versionWithLength = 0x03312e36; // 1.6
uint256 constant information_length = 0xa0;

// uint256(uint32(bytes4(keccak256("_REENTRANCY_GUARD_SLOT"))))
uint256 constant _REENTRANCY_GUARD_SLOT = 0x929eee14;

/*
 *
 * --------------------------------------------------------------------------+
 * Opcode      | Mnemonic         | Stack               | Memory             |
 * --------------------------------------------------------------------------|
 * 60 0x02     | PUSH1 0x02       | 0x02                |                    |
 * 60 0x1e     | PUSH1 0x1e       | 0x1e 0x02           |                    |
 * 61 0x3d5c   | PUSH2 0x3d5c     | 0x3d5c 0x1e 0x02    |                    |
 * 3d          | RETURNDATASIZE   | 0 0x3d5c 0x1e 0x02  |                    |
 *                                                                           |
 * ::: store deployed bytecode in memory: (3d) RETURNDATASIZE (5c) TLOAD ::: |
 * 52          | MSTORE           | 0x1e 0x02           | [0..0x20): 0x3d5c  |
 * f3          | RETURN           |                     | [0..0x20): 0x3d5c  |
 * --------------------------------------------------------------------------+
 */
uint256 constant _TLOAD_TEST_PAYLOAD = 0x6002_601e_613d5c_3d_52_f3;
uint256 constant _TLOAD_TEST_PAYLOAD_LENGTH = 0x0a;
uint256 constant _TLOAD_TEST_PAYLOAD_OFFSET = 0x16;
uint256 constant _NOT_ENTERED_TSTORE = 0;
uint256 constant _ENTERED_TSTORE = 1;
uint256 constant _ENTERED_AND_ACCEPTING_NATIVE_TOKENS_TSTORE = 2;
uint256 constant _TSTORE_ENABLED_SSTORE = 0;
uint256 constant _NOT_ENTERED_SSTORE = 1;
uint256 constant _ENTERED_SSTORE = 2;
uint256 constant _ENTERED_AND_ACCEPTING_NATIVE_TOKENS_SSTORE = 3;

uint256 constant Offset_fulfillAdvancedOrder_criteriaResolvers = 0x20;
uint256 constant Offset_fulfillAvailableOrders_offerFulfillments = 0x20;
uint256 constant Offset_fulfillAvailableOrders_considerationFulfillments = 0x40;
uint256 constant Offset_fulfillAvailableAdvancedOrders_criteriaResolvers = 0x20;
uint256 constant Offset_fulfillAvailableAdvancedOrders_offerFulfillments = 0x40;
uint256 constant Offset_fulfillAvailableAdvancedOrders_cnsdrationFlflmnts =
    (0x60);

uint256 constant Offset_matchOrders_fulfillments = 0x20;

uint256 constant Offset_matchAdvancedOrders_criteriaResolvers = 0x20;
uint256 constant Offset_matchAdvancedOrders_fulfillments = 0x40;

// Common Offsets
// Offsets for identically positioned fields shared by:
// OfferItem, ConsiderationItem, SpentItem, ReceivedItem

uint256 constant Selector_length = 0x4;

uint256 constant Common_token_offset = 0x20;
uint256 constant Common_identifier_offset = 0x40;
uint256 constant Common_amount_offset = 0x60;
uint256 constant Common_endAmount_offset = 0x80;

uint256 constant SpentItem_size = 0x80;
uint256 constant SpentItem_size_shift = 0x7;

uint256 constant OfferItem_size = 0xa0;
uint256 constant OfferItem_size_with_head_pointer = 0xc0;

uint256 constant ReceivedItem_size_excluding_recipient = 0x80;
uint256 constant ReceivedItem_size = 0xa0;
uint256 constant ReceivedItem_amount_offset = 0x60;
uint256 constant ReceivedItem_recipient_offset = 0x80;

uint256 constant ReceivedItem_CommonParams_size = 0x60;

uint256 constant ConsiderationItem_size = 0xc0;
uint256 constant ConsiderationItem_size_with_head_pointer = 0xe0;

uint256 constant ConsiderationItem_recipient_offset = 0xa0;
// Store the same constant in an abbreviated format for a line length fix.
uint256 constant ConsiderItem_recipient_offset = 0xa0;

uint256 constant Execution_offerer_offset = 0x20;
uint256 constant Execution_conduit_offset = 0x40;

// uint256 constant OrderParameters_offerer_offset = 0x00;
uint256 constant OrderParameters_zone_offset = 0x20;
uint256 constant OrderParameters_offer_head_offset = 0x40;
uint256 constant OrderParameters_consideration_head_offset = 0x60;
// uint256 constant OrderParameters_orderType_offset = 0x80;
uint256 constant OrderParameters_startTime_offset = 0xa0;
uint256 constant OrderParameters_endTime_offset = 0xc0;
uint256 constant OrderParameters_zoneHash_offset = 0xe0;
uint256 constant OrderParameters_salt_offset = 0x100;
uint256 constant OrderParameters_conduit_offset = 0x120;
uint256 constant OrderParameters_counter_offset = 0x140;

uint256 constant Fulfillment_itemIndex_offset = 0x20;

uint256 constant AdvancedOrder_head_size = 0xa0;
uint256 constant AdvancedOrder_numerator_offset = 0x20;
uint256 constant AdvancedOrder_denominator_offset = 0x40;
uint256 constant AdvancedOrder_signature_offset = 0x60;
uint256 constant AdvancedOrder_extraData_offset = 0x80;

uint256 constant OrderStatus_ValidatedAndNotCancelled = 1;
uint256 constant OrderStatus_filledNumerator_offset = 0x10;
uint256 constant OrderStatus_filledDenominator_offset = 0x88;
uint256 constant OrderStatus_ValidatedAndNotCancelledAndFullyFilled = (
    0x0000000000000000000000000000010000000000000000000000000000010001
);

uint256 constant ThirtyOneBytes = 0x1f;
uint256 constant OneWord = 0x20;
uint256 constant TwoWords = 0x40;
uint256 constant ThreeWords = 0x60;
uint256 constant FourWords = 0x80;
uint256 constant FiveWords = 0xa0;

uint256 constant OneWordShift = 0x5;
uint256 constant TwoWordsShift = 0x6;

uint256 constant SixtyThreeBytes = 0x3f;
uint256 constant OnlyFullWordMask = 0xffffffe0;

uint256 constant FreeMemoryPointerSlot = 0x40;
uint256 constant ZeroSlot = 0x60;
uint256 constant DefaultFreeMemoryPointer = 0x80;

uint256 constant Slot0x80 = 0x80;
uint256 constant Slot0xA0 = 0xa0;

uint256 constant BasicOrder_common_params_size = 0xa0;
uint256 constant BasicOrder_considerationHashesArray_ptr = 0x160;
uint256 constant BasicOrder_receivedItemByteMap =
    (0x0000010102030000000000000000000000000000000000000000000000000000);
uint256 constant BasicOrder_offeredItemByteMap =
    (0x0203020301010000000000000000000000000000000000000000000000000000);
uint256 constant BasicOrder_consideration_offset_from_offer = 0xa0;

bytes32 constant OrdersMatchedTopic0 =
    (0x4b9f2d36e1b4c93de62cc077b00b1a91d84b6c31b4a14e012718dcca230689e7);

uint256 constant EIP712_Order_size = 0x180;
uint256 constant EIP712_OfferItem_size = 0xc0;
uint256 constant EIP712_ConsiderationItem_size = 0xe0;
uint256 constant AdditionalRecipient_size = 0x40;
uint256 constant AdditionalRecipient_size_shift = 0x6;

uint256 constant EIP712_DomainSeparator_offset = 0x02;
uint256 constant EIP712_OrderHash_offset = 0x22;
uint256 constant EIP712_DigestPayload_size = 0x42;

uint256 constant EIP712_domainData_nameHash_offset = 0x20;
uint256 constant EIP712_domainData_versionHash_offset = 0x40;
uint256 constant EIP712_domainData_chainId_offset = 0x60;
uint256 constant EIP712_domainData_verifyingContract_offset = 0x80;
uint256 constant EIP712_domainData_size = 0xa0;

// Minimum BulkOrder proof size: 64 bytes for signature + 3 for key + 32 for 1
// sibling. Maximum BulkOrder proof size: 65 bytes for signature + 3 for key +
// 768 for 24 siblings.

uint256 constant BulkOrderProof_minSize = 0x63;
uint256 constant BulkOrderProof_rangeSize = 0x2e2;
uint256 constant BulkOrderProof_lengthAdjustmentBeforeMask = 0x1d;
uint256 constant BulkOrderProof_lengthRangeAfterMask = 0x2;
uint256 constant BulkOrderProof_keyShift = 0xe8;
uint256 constant BulkOrderProof_keySize = 0x3;

uint256 constant BulkOrder_Typehash_Height_One =
    (0x3ca2711d29384747a8f61d60aad3c450405f7aaff5613541dee28df2d6986d32);
uint256 constant BulkOrder_Typehash_Height_Two =
    (0xbf8e29b89f29ed9b529c154a63038ffca562f8d7cd1e2545dda53a1b582dde30);
uint256 constant BulkOrder_Typehash_Height_Three =
    (0x53c6f6856e13104584dd0797ca2b2779202dc2597c6066a42e0d8fe990b0024d);
uint256 constant BulkOrder_Typehash_Height_Four =
    (0xa02eb7ff164c884e5e2c336dc85f81c6a93329d8e9adf214b32729b894de2af1);
uint256 constant BulkOrder_Typehash_Height_Five =
    (0x39c9d33c18e050dda0aeb9a8086fb16fc12d5d64536780e1da7405a800b0b9f6);
uint256 constant BulkOrder_Typehash_Height_Six =
    (0x1c19f71958cdd8f081b4c31f7caf5c010b29d12950be2fa1c95070dc47e30b55);
uint256 constant BulkOrder_Typehash_Height_Seven =
    (0xca74fab2fece9a1d58234a274220ad05ca096a92ef6a1ca1750b9d90c948955c);
uint256 constant BulkOrder_Typehash_Height_Eight =
    (0x7ff98d9d4e55d876c5cfac10b43c04039522f3ddfb0ea9bfe70c68cfb5c7cc14);
uint256 constant BulkOrder_Typehash_Height_Nine =
    (0xbed7be92d41c56f9e59ac7a6272185299b815ddfabc3f25deb51fe55fe2f9e8a);
uint256 constant BulkOrder_Typehash_Height_Ten =
    (0xd1d97d1ef5eaa37a4ee5fbf234e6f6d64eb511eb562221cd7edfbdde0848da05);
uint256 constant BulkOrder_Typehash_Height_Eleven =
    (0x896c3f349c4da741c19b37fec49ed2e44d738e775a21d9c9860a69d67a3dae53);
uint256 constant BulkOrder_Typehash_Height_Twelve =
    (0xbb98d87cc12922b83759626c5f07d72266da9702d19ffad6a514c73a89002f5f);
uint256 constant BulkOrder_Typehash_Height_Thirteen =
    (0xe6ae19322608dd1f8a8d56aab48ed9c28be489b689f4b6c91268563efc85f20e);
uint256 constant BulkOrder_Typehash_Height_Fourteen =
    (0x6b5b04cbae4fcb1a9d78e7b2dfc51a36933d023cf6e347e03d517b472a852590);
uint256 constant BulkOrder_Typehash_Height_Fifteen =
    (0xd1eb68309202b7106b891e109739dbbd334a1817fe5d6202c939e75cf5e35ca9);
uint256 constant BulkOrder_Typehash_Height_Sixteen =
    (0x1da3eed3ecef6ebaa6e5023c057ec2c75150693fd0dac5c90f4a142f9879fde8);
uint256 constant BulkOrder_Typehash_Height_Seventeen =
    (0xeee9a1392aa395c7002308119a58f2582777a75e54e0c1d5d5437bd2e8bf6222);
uint256 constant BulkOrder_Typehash_Height_Eighteen =
    (0xc3939feff011e53ab8c35ca3370aad54c5df1fc2938cd62543174fa6e7d85877);
uint256 constant BulkOrder_Typehash_Height_Nineteen =
    (0x0efca7572ac20f5ae84db0e2940674f7eca0a4726fa1060ffc2d18cef54b203d);
uint256 constant BulkOrder_Typehash_Height_Twenty =
    (0x5a4f867d3d458dabecad65f6201ceeaba0096df2d0c491cc32e6ea4e64350017);
uint256 constant BulkOrder_Typehash_Height_TwentyOne =
    (0x80987079d291feebf21c2230e69add0f283cee0b8be492ca8050b4185a2ff719);
uint256 constant BulkOrder_Typehash_Height_TwentyTwo =
    (0x3bd8cff538aba49a9c374c806d277181e9651624b3e31111bc0624574f8bca1d);
uint256 constant BulkOrder_Typehash_Height_TwentyThree =
    (0x5d6a3f098a0bc373f808c619b1bb4028208721b3c4f8d6bc8a874d659814eb76);
uint256 constant BulkOrder_Typehash_Height_TwentyFour =
    (0x1d51df90cba8de7637ca3e8fe1e3511d1dc2f23487d05dbdecb781860c21ac1c);

uint256 constant receivedItemsHash_ptr = 0x60;

/*
 *  Memory layout in _prepareBasicFulfillmentFromCalldata of
 *  data for OrderFulfilled
 *
 *   event OrderFulfilled(
 *     bytes32 orderHash,
 *     address indexed offerer,
 *     address indexed zone,
 *     address fulfiller,
 *     SpentItem[] offer,
 *       > (itemType, token, id, amount)
 *     ReceivedItem[] consideration
 *       > (itemType, token, id, amount, recipient)
 *   )
 *
 *  - 0x00: orderHash
 *  - 0x20: fulfiller
 *  - 0x40: offer offset (0x80)
 *  - 0x60: consideration offset (0x120)
 *  - 0x80: offer.length (1)
 *  - 0xa0: offerItemType
 *  - 0xc0: offerToken
 *  - 0xe0: offerIdentifier
 *  - 0x100: offerAmount
 *  - 0x120: consideration.length (1 + additionalRecipients.length)
 *  - 0x140: considerationItemType
 *  - 0x160: considerationToken
 *  - 0x180: considerationIdentifier
 *  - 0x1a0: considerationAmount
 *  - 0x1c0: considerationRecipient
 *  - ...
 */

// Minimum length of the OrderFulfilled event data.
// Must be added to the size of the ReceivedItem array for additionalRecipients
// (0xa0 * additionalRecipients.length) to calculate full size of the buffer.
uint256 constant OrderFulfilled_baseSize = 0x1e0;
uint256 constant OrderFulfilled_selector =
    (0x9d9af8e38d66c62e2c12f0225249fd9d721c54b83f48d9352c97c6cacdcb6f31);

// Minimum offset in memory to OrderFulfilled event data.
// Must be added to the size of the EIP712 hash array for additionalRecipients
// (32 * additionalRecipients.length) to calculate the pointer to event data.
uint256 constant OrderFulfilled_baseOffset = 0x180;
uint256 constant OrderFulfilled_consideration_length_baseOffset = 0x2a0;
uint256 constant OrderFulfilled_offer_length_baseOffset = 0x200;

uint256 constant OrderFulfilled_offer_length_offset_relativeTo_baseOffset = (
    0x80
);
uint256 constant OrderFulfilled_offer_itemType_offset_relativeTo_baseOffset = (
    0xa0
);
uint256 constant OrderFulfilled_offer_token_offset_relativeTo_baseOffset = 0xc0;

// Related constants used for restricted order checks on basic orders.
uint256 constant OrderFulfilled_baseDataSize = 0x160;
// uint256 constant ValidateOrder_offerDataOffset = 0x184;
// uint256 constant RatifyOrder_offerDataOffset = 0xc4;

// uint256 constant OrderFulfilled_orderHash_offset = 0x00;
uint256 constant OrderFulfilled_fulfiller_offset = 0x20;
uint256 constant OrderFulfilled_offer_head_offset = 0x40;
uint256 constant OrderFulfilled_offer_body_offset = 0x80;
uint256 constant OrderFulfilled_consideration_head_offset = 0x60;
uint256 constant OrderFulfilled_consideration_body_offset = 0x120;

/*
 * 3 memory slots/words for `authorizeOrder` and `validateOrder` calldata
 * to be used for tails of extra data (length 0) and order hashes (length 1)
 */
uint256 constant OrderFulfilled_post_memory_region_reservedBytes = 0x60;

/*
 * OrderFulfilled_offer_length_baseOffset - 12 * 0x20
 * we back up 12 words from where the `OrderFulfilled`'s data
 * for spent items start to be rewritten for `authorizeOrder`
 * and `validateOrder`. Let the reference pointer be `ptr`
 * pointing to the `OrderFulfilled`'s spent item array's length memory
 * position then we would have:
 *
 * ptr - 0x0180 : zero-padded calldata selector
 * ptr - 0x0160 : ZoneParameter's struct head (0x20)
 * ptr - 0x0140 : order hash
 * ptr - 0x0120 : fulfiller (msg.sender)
 * ptr - 0x0100 : offerer
 * ptr - 0x00e0 : spent items' head
 * ptr - 0x00c0 : received items' head
 * ptr - 0x00a0 : extra data / context head
 * ptr - 0x0080 : order hashes head
 * ptr - 0x0060 : start time
 * ptr - 0x0040 : end time
 * ptr - 0x0020 : zone hash
 * ptr - 0x0000 : offer.length (1)
 * ...
 *
 * Note that the padded calldata selector will be at minimum at the
 * 0x80 memory slot.
 */
uint256 constant authorizeOrder_calldata_baseOffset = (
    OrderFulfilled_offer_length_baseOffset - 0x180
);

// BasicOrderParameters
uint256 constant BasicOrder_parameters_cdPtr = 0x04;
uint256 constant BasicOrder_considerationToken_cdPtr = 0x24;
uint256 constant BasicOrder_considerationIdentifier_cdPtr = 0x44;
uint256 constant BasicOrder_considerationAmount_cdPtr = 0x64;
uint256 constant BasicOrder_offerer_cdPtr = 0x84;
uint256 constant BasicOrder_zone_cdPtr = 0xa4;
uint256 constant BasicOrder_offerToken_cdPtr = 0xc4;
uint256 constant BasicOrder_offerIdentifier_cdPtr = 0xe4;
uint256 constant BasicOrder_offerAmount_cdPtr = 0x104;
uint256 constant BasicOrder_basicOrderParameters_cd_offset = 0x24;
uint256 constant BasicOrder_basicOrderType_cdPtr = 0x124;
uint256 constant BasicOrder_startTime_cdPtr = 0x144;
uint256 constant BasicOrder_endTime_cdPtr = 0x164;
// uint256 constant BasicOrder_zoneHash_cdPtr = 0x184;
// uint256 constant BasicOrder_salt_cdPtr = 0x1a4;
uint256 constant BasicOrder_offererConduit_cdPtr = 0x1c4;
uint256 constant BasicOrder_fulfillerConduit_cdPtr = 0x1e4;
uint256 constant BasicOrder_totalOriginalAdditionalRecipients_cdPtr = 0x204;
uint256 constant BasicOrder_additionalRecipients_head_cdPtr = 0x224;
uint256 constant BasicOrder_signature_cdPtr = 0x244;
uint256 constant BasicOrder_additionalRecipients_length_cdPtr = 0x264;
uint256 constant BasicOrder_addlRecipients_length_cdPtr = 0x264;
uint256 constant BasicOrder_additionalRecipients_data_cdPtr = 0x284;
uint256 constant BasicOrder_parameters_ptr = 0x20;
uint256 constant BasicOrder_basicOrderType_range = 0x18; // 24 values

/*
 *  Memory layout in _prepareBasicFulfillmentFromCalldata of
 *  EIP712 data for ConsiderationItem
 *   - 0x80: ConsiderationItem EIP-712 typehash (constant)
 *   - 0xa0: itemType
 *   - 0xc0: token
 *   - 0xe0: identifier
 *   - 0x100: startAmount
 *   - 0x120: endAmount
 *   - 0x140: recipient
 */
uint256 constant BasicOrder_considerationItem_typeHash_ptr = 0x80; // memoryPtr
uint256 constant BasicOrder_considerationItem_itemType_ptr = 0xa0;
uint256 constant BasicOrder_considerationItem_token_ptr = 0xc0;
uint256 constant BasicOrder_considerationItem_identifier_ptr = 0xe0;
uint256 constant BasicOrder_considerationItem_startAmount_ptr = 0x100;
uint256 constant BasicOrder_considerationItem_endAmount_ptr = 0x120;
// uint256 constant BasicOrder_considerationItem_recipient_ptr = 0x140;

/*
 *  Memory layout in _prepareBasicFulfillmentFromCalldata of
 *  EIP712 data for OfferItem
 *   - 0x80:  OfferItem EIP-712 typehash (constant)
 *   - 0xa0:  itemType
 *   - 0xc0:  token
 *   - 0xe0:  identifier (reused for offeredItemsHash)
 *   - 0x100: startAmount
 *   - 0x120: endAmount
 */
uint256 constant BasicOrder_offerItem_typeHash_ptr = 0x80;
uint256 constant BasicOrder_offerItem_itemType_ptr = 0xa0;
uint256 constant BasicOrder_offerItem_token_ptr = 0xc0;
// uint256 constant BasicOrder_offerItem_identifier_ptr = 0xe0;
// uint256 constant BasicOrder_offerItem_startAmount_ptr = 0x100;
uint256 constant BasicOrder_offerItem_endAmount_ptr = 0x120;

/*
 *  Memory layout in _prepareBasicFulfillmentFromCalldata of
 *  EIP712 data for Order
 *   - 0x80:   Order EIP-712 typehash (constant)
 *   - 0xa0:   orderParameters.offerer
 *   - 0xc0:   orderParameters.zone
 *   - 0xe0:   keccak256(abi.encodePacked(offerHashes))
 *   - 0x100:  keccak256(abi.encodePacked(considerationHashes))
 *   - 0x120:  orderType
 *   - 0x140:  startTime
 *   - 0x160:  endTime
 *   - 0x180:  zoneHash
 *   - 0x1a0:  salt
 *   - 0x1c0:  conduit
 *   - 0x1e0:  _counters[orderParameters.offerer] (from storage)
 */
uint256 constant BasicOrder_order_typeHash_ptr = 0x80;
uint256 constant BasicOrder_order_offerer_ptr = 0xa0;
// uint256 constant BasicOrder_order_zone_ptr = 0xc0;
uint256 constant BasicOrder_order_offerHashes_ptr = 0xe0;
uint256 constant BasicOrder_order_considerationHashes_ptr = 0x100;
uint256 constant BasicOrder_order_orderType_ptr = 0x120;
uint256 constant BasicOrder_order_startTime_ptr = 0x140;
// uint256 constant BasicOrder_order_endTime_ptr = 0x160;
// uint256 constant BasicOrder_order_zoneHash_ptr = 0x180;
// uint256 constant BasicOrder_order_salt_ptr = 0x1a0;
// uint256 constant BasicOrder_order_conduitKey_ptr = 0x1c0;
uint256 constant BasicOrder_order_counter_ptr = 0x1e0;
uint256 constant BasicOrder_additionalRecipients_head_ptr = 0x240;
uint256 constant BasicOrder_signature_ptr = 0x260;
uint256 constant BasicOrder_startTimeThroughZoneHash_size = 0x60;

uint256 constant ContractOrder_orderHash_offerer_shift = 0x60;

uint256 constant Counter_blockhash_shift = 0x80;

// Signature-related
bytes32 constant EIP2098_allButHighestBitMask =
    (0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
bytes32 constant ECDSA_twentySeventhAndTwentyEighthBytesSet =
    (0x0000000000000000000000000000000000000000000000000000000101000000);
uint256 constant ECDSA_MaxLength = 65;
uint256 constant ECDSA_signature_s_offset = 0x40;
uint256 constant ECDSA_signature_v_offset = 0x60;

bytes32 constant EIP1271_isValidSignature_selector =
    (0x1626ba7e00000000000000000000000000000000000000000000000000000000);
uint256 constant EIP1271_isValidSignature_digest_negativeOffset = 0x40;
uint256 constant EIP1271_isValidSignature_selector_negativeOffset = 0x44;
uint256 constant EIP1271_isValidSignature_calldata_baseLength = 0x64;
uint256 constant EIP1271_isValidSignature_signature_head_offset = 0x40;

uint256 constant EIP_712_PREFIX =
    (0x1901000000000000000000000000000000000000000000000000000000000000);

uint256 constant ExtraGasBuffer = 0x20;
uint256 constant CostPerWord = 0x3;
uint256 constant MemoryExpansionCoefficientShift = 0x9;

uint256 constant Create2AddressDerivation_ptr = 0x0b;
uint256 constant Create2AddressDerivation_length = 0x55;

uint256 constant MaskOverByteTwelve =
    (0x0000000000000000000000ff0000000000000000000000000000000000000000);
uint256 constant MaskOverLastTwentyBytes =
    (0x000000000000000000000000ffffffffffffffffffffffffffffffffffffffff);
uint256 constant AddressDirtyUpperBitThreshold =
    (0x0000000000000000000000010000000000000000000000000000000000000000);
uint256 constant MaskOverFirstFourBytes =
    (0xffffffff00000000000000000000000000000000000000000000000000000000);

uint256 constant Conduit_execute_signature =
    (0x4ce34aa200000000000000000000000000000000000000000000000000000000);

uint256 constant MaxUint8 = 0xff;
uint256 constant MaxUint120 = 0xffffffffffffffffffffffffffffff;

uint256 constant Conduit_execute_ConduitTransfer_ptr = 0x20;
uint256 constant Conduit_execute_ConduitTransfer_length = 0x01;
uint256 constant Conduit_execute_ConduitTransfer_offset_ptr = 0x04;
uint256 constant Conduit_execute_ConduitTransfer_length_ptr = 0x24;
uint256 constant Conduit_execute_transferItemType_ptr = 0x44;
uint256 constant Conduit_execute_transferToken_ptr = 0x64;
uint256 constant Conduit_execute_transferFrom_ptr = 0x84;
uint256 constant Conduit_execute_transferTo_ptr = 0xa4;
uint256 constant Conduit_execute_transferIdentifier_ptr = 0xc4;
uint256 constant Conduit_execute_transferAmount_ptr = 0xe4;

uint256 constant OneConduitExecute_size = 0x104;

// Sentinel value to indicate that the conduit accumulator is not armed.
uint256 constant AccumulatorDisarmed = 0x20;
uint256 constant AccumulatorArmed = 0x40;
uint256 constant Accumulator_conduitKey_ptr = 0x20;
uint256 constant Accumulator_selector_ptr = 0x40;
uint256 constant Accumulator_array_offset_ptr = 0x44;
uint256 constant Accumulator_array_length_ptr = 0x64;
uint256 constant Accumulator_itemSizeOffsetDifference = 0x3c;
uint256 constant Accumulator_array_offset = 0x20;

uint256 constant Conduit_transferItem_size = 0xc0;
uint256 constant Conduit_transferItem_token_ptr = 0x20;
uint256 constant Conduit_transferItem_from_ptr = 0x40;
uint256 constant Conduit_transferItem_to_ptr = 0x60;
uint256 constant Conduit_transferItem_identifier_ptr = 0x80;
uint256 constant Conduit_transferItem_amount_ptr = 0xa0;

uint256 constant Ecrecover_precompile = 0x1;
uint256 constant Ecrecover_args_size = 0x80;
uint256 constant Signature_lower_v = 27;

// Bitmask that only gives a non-zero value if masked with a non-match selector.
uint256 constant NonMatchSelector_MagicMask =
    (0x4000000000000000000000000000000000000000000000000000000000);

// First bit indicates that a NATIVE offer items has been used and the 231st bit
// indicates that a non match selector has been called.
uint256 constant NonMatchSelector_InvalidErrorValue =
    (0x4000000000000000000000000000000000000000000000000000000001);

/**
 * @dev Selector and offsets for generateOrder
 *
 * function generateOrder(
 *   address fulfiller,
 *   SpentItem[] calldata minimumReceived,
 *   SpentItem[] calldata maximumSpent,
 *   bytes calldata context
 * )
 */
uint256 constant generateOrder_selector = 0x98919765;
uint256 constant generateOrder_selector_offset = 0x1c;
uint256 constant generateOrder_head_offset = 0x04;
uint256 constant generateOrder_minimumReceived_head_offset = 0x20;
uint256 constant generateOrder_maximumSpent_head_offset = 0x40;
uint256 constant generateOrder_context_head_offset = 0x60;
uint256 constant generateOrder_base_tail_offset = 0x80;
uint256 constant generateOrder_maximum_returned_array_length = 0xffff;

uint256 constant ratifyOrder_selector = 0xf4dd92ce;
uint256 constant ratifyOrder_selector_offset = 0x1c;
uint256 constant ratifyOrder_head_offset = 0x04;
// uint256 constant ratifyOrder_offer_head_offset = 0x00;
uint256 constant ratifyOrder_consideration_head_offset = 0x20;
uint256 constant ratifyOrder_context_head_offset = 0x40;
uint256 constant ratifyOrder_orderHashes_head_offset = 0x60;
uint256 constant ratifyOrder_contractNonce_offset = 0x80;
uint256 constant ratifyOrder_base_tail_offset = 0xa0;

uint256 constant validateOrder_selector = 0x17b1f942;
uint256 constant validateOrder_selector_offset = 0x1c;
uint256 constant validateOrder_head_offset = 0x04;
uint256 constant validateOrder_zoneParameters_offset = 0x20;

uint256 constant authorizeOrder_selector = 0x01e4d72a;
uint256 constant authorizeOrder_selector_offset = 0x1c;
uint256 constant authorizeOrder_head_offset = 0x04;
uint256 constant authorizeOrder_zoneParameters_offset = 0x20;

// uint256 constant ZoneParameters_orderHash_offset = 0x00;
uint256 constant ZoneParameters_fulfiller_offset = 0x20;
uint256 constant ZoneParameters_offerer_offset = 0x40;
uint256 constant ZoneParameters_offer_head_offset = 0x60;
uint256 constant ZoneParameters_consideration_head_offset = 0x80;
uint256 constant ZoneParameters_extraData_head_offset = 0xa0;
uint256 constant ZoneParameters_orderHashes_head_offset = 0xc0;
uint256 constant ZoneParameters_startTime_offset = 0xe0;
uint256 constant ZoneParameters_endTime_offset = 0x100;
uint256 constant ZoneParameters_zoneHash_offset = 0x120;
uint256 constant ZoneParameters_base_tail_offset = 0x140;
uint256 constant ZoneParameters_selectorAndPointer_length = 0x24;
uint256 constant ZoneParameters_basicOrderFixedElements_length = 0x44;

// ConsiderationDecoder Constants
uint256 constant OrderParameters_head_size = 0x0160;
uint256 constant OrderParameters_totalOriginalConsiderationItems_offset = (
    0x0140
);
uint256 constant AdvancedOrderPlusOrderParameters_head_size = 0x0200;

uint256 constant Order_signature_offset = 0x20;
uint256 constant Order_head_size = 0x40;

uint256 constant AdvancedOrder_fixed_segment_0 = 0x40;

uint256 constant CriteriaResolver_head_size = 0xa0;
uint256 constant CriteriaResolver_fixed_segment_0 = 0x80;
uint256 constant CriteriaResolver_criteriaProof_offset = 0x80;

uint256 constant FulfillmentComponent_mem_tail_size = 0x40;
uint256 constant FulfillmentComponent_mem_tail_size_shift = 0x6;
uint256 constant Fulfillment_head_size = 0x40;
uint256 constant Fulfillment_considerationComponents_offset = 0x20;

uint256 constant OrderComponents_OrderParameters_common_head_size = 0x0140;