Function getHashInstance

libs/@local/hash-backend-utils/src/hash-instance.ts:54–89

(
  context: { graphApi: GraphApi },
  authentication: { actorId: ActorEntityUuid },
)

 * Get the hash instance.
 */
export const getHashInstance = async (
  context: { graphApi: GraphApi },
  authentication: { actorId: ActorEntityUuid },
): Promise<HashInstance> => {
  const { entities } = await backOff(
    () =>
      queryEntities<HASHInstanceEntity>(context, authentication, {
        filter: {
          equal: [
            { path: ["type", "baseUrl"] },
            { parameter: systemEntityTypes.hashInstance.entityTypeBaseUrl },
          ],
        },
        temporalAxes: currentTimeInstantTemporalAxes,
        includeDrafts: false,
        includePermissions: false,
      }),
    {
      numOfAttempts: 3,
      startingDelay: 1_000,
      jitter: "full",
    },
  );

  if (entities.length > 1) {
    throw new Error("More than one hash instance entity found in the graph.");
  }

  const entity = entities[0];

  if (!entity) {
    throw new NotFoundError("Could not find hash instance entity.");
  }

  return getHashInstanceFromEntity({ entity });
};