#Function: uuidV7()

uuidV7(args: { lix: Pick<Lix, "sqlite" | "db" | "hooks">; }): string

Returns a UUID v7 that is deterministic in deterministic mode.

In normal mode, returns a standard time-based UUID v7. In deterministic mode, returns UUIDs with a fixed timestamp prefix and sequential counter suffix.

UUID v7 provides better database performance than nanoId due to time-based sorting, but produces longer IDs that are less suitable for URLs.

• Normal mode: Standard UUID v7 with current timestamp
• Deterministic mode: Fixed prefix "01920000-0000-7000-8800-" + 12-digit hex counter
• Counter state shared with nextDeterministicSequenceNumber
• Choose UUID v7 for time-sortable database keys, nanoId for URL-friendly short IDs

#Examples

const lix = await openLix();
uuidV7({ lix }); // "01920000-5432-7654-8abc-def012345678"

const lix = await openLix({
  keyValues: [{ key: "lix_deterministic_mode", value: { enabled: true }, lixcol_version_id: "global" }]
});
uuidV7({ lix }); // "01920000-0000-7000-8000-000000000000"
uuidV7({ lix }); // "01920000-0000-7000-8000-000000000001"
uuidV7({ lix }); // "01920000-0000-7000-8000-000000000002"

await lix.db
  .insertInto("change")
  .values({
    id: uuidV7({ lix }),
    content: "Updated user profile"
  })
  .execute();

#Parameters

#Returns

string

UUID v7 string