Function ulidToUUID

source/uuid.ts:12–32

(ulid: ULID)

 * @returns A UUID string
 */
export function ulidToUUID(ulid: ULID): UUID {
    const isValid = ULID_REGEX.test(ulid);
    if (!isValid) {
        throw new ULIDError(ULIDErrorCode.ULIDInvalid, `Invalid ULID: ${ulid}`);
    }
    const uint8Array = crockfordDecode(ulid);
    let uuid = Array.from(uint8Array)
        .map(byte => byte.toString(16).padStart(2, "0"))
        .join("");
    uuid =
        uuid.substring(0, 8) +
        "-" +
        uuid.substring(8, 12) +
        "-" +
        uuid.substring(12, 16) +
        "-" +
        uuid.substring(16, 20) +
        "-" +
        uuid.substring(20);
    return uuid.toUpperCase() as UUID;
}

/**
 * Convert a UUID to a ULID