Header

+-----------------------------------------------------------------------------------------------+
|00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31|
+-----------+-----------+-----------------------------------------------+-----------+-----------+
|   Magic   | Spec ver. |             Asset UUID version 4              | Type enum | Checksum...
+-----------+-----------+-----------------------------------------------+-----------+-----------
            |
 -----------+

struct File_Header {
    uint8_t[4]      magic;                      // String "GALI"
    uint32_t        specification_version;      // Using semantic version - uint8_t major, uint8_t minor, uint16_t patch 
    uint128_t       asset_uuid;                 // UUID version 4
    uint32_t        asset_type;                 // Asset_Type enum backed by a uint32_t
    uint64_t        asset_checksum;             // xxhash XXH3 of the file contents, EXCLUDING the file header.
};
//  36 bytes total

See also

• UUID specification
• Cyan4973/xxhash

What’s next?

• Primitive assets
• Aggregate assets