Creating a Custom Runtime for Reusing Data in an Async Program

  interface AppLayer {
    readonly init: () => Effect.Effect<never, never, unknown>;
  }
  const AppLayer = Context.Tag<AppLayer>("appLayer");

  const AppLayerLive = Layer.succeed(
    AppLayer,
    AppLayer.of({
      init: () =>
        Effect.promise(() => {
          return new Promise((resolve) => {
            setTimeout(() => {
              resolve({ data: "config" });
            }, 1000);
          });
        }),
    })
  );

  const runtime = await Effect.runPromise(
    Layer.toRuntime(AppLayerLive).pipe(Scope.extend(scope))
  );


  const program = Effect.gen(function* (_) {
    const appLayer = yield* _(AppLayer);
    const config = yield* _(appLayer.init());
    const serverLoadedFeed = yield* _(pipe(Effect.succeed(config)));
    return serverLoadedFeed;
  });

   Runtime.runPromise(runtime)(program);