Worker Entrypoint

The Worker entrypoint usually exports:

a default fetch handler
each Durable Object class as a named export

Worker.make(...) supplies the Worker-side runtime for ordinary HTTP handling. WorkerdActorNamespace provides the Worker-side Durable Object binding, while WorkerdActorRuntime.make(...) defines the Durable Object class.

Build the entrypoint

// main.ts
import { Effect, Layer } from "effect"
import { Assets, Worker } from "effect-workerd"
import { HttpRouter, HttpServerResponse } from "effect/unstable/http"
 
import * as GameState from "./Games.ts"
import { KvLive } from "./KvLive.ts"
import { TicTacToeNamespace } from "./TicTacToeNamespace.ts"
import { TicTacToeRuntime } from "./TicTacToeRuntime.ts"
 
export { TicTacToeRuntime as TicTacToe }
 
const ApiLive = Layer.mergeAll(
  HttpRouter.add("GET", "/", Effect.succeed(HttpServerResponse.text("ok"))),
  HttpRouter.add(
    "GET",
    "/play",
    Effect.gen(function* () {
      const { gameId, player } = yield* GameState.init
      return yield* TicTacToeNamespace.bind(gameId).upgrade({ player })
    }),
  ),
  HttpRouter.cors({
    allowedHeaders: ["*"],
    allowedMethods: ["*"],
    allowedOrigins: ["*"],
  }),
  HttpRouter.add("*", "/*", Assets.forward),
)
 
export default Worker.make({
  handler: ApiLive.pipe(HttpRouter.toHttpEffect, Effect.flatten),
  prelude: Layer.mergeAll(KvLive, TicTacToeNamespace.layer, Assets.layer("ASSETS")),
})

Things to notice

HttpRouter.add(method, path, effect) mounts a single route.
HttpRouter.cors(...) wires up CORS for every route in the router.
HttpRouter.add("*", "/*", Assets.forward) falls through to the Cloudflare Assets binding for unmatched requests.
Worker.make({ handler, prelude }) produces the Worker fetch export.
The Durable Object runtime class must be re-exported from the Worker entrypoint under the binding's class name.