Using CF Workers Service Bindings

[misraishan]

I keep getting the following error. When I try to log c.env, the service doesn't show up (as shown in index.ts).

✘ [ERROR] TypeError: Cannot read properties of undefined (reading 'fetch')

I'm not really sure if I've got the right setup so far, but here's what I've done:

Worker A

wrangler.toml

services = [
  { binding = "task_service", service = "worker_b" }
]

index.ts

export interface Bindings {
  task_service: Fetcher;
}


const app = new OpenAPIHono<{Bindings: Bindings}>().basePath(basePath);

route.ts

const route = new OpenAPIHono<{Bindings: Bindings}>();

route.openapi(toggleCompleteRoute, toggleCompleteHandler);

async function toggleCompleteHandler(c: Context<{Bindings: Bindings}>) {
  // Getting params to pass in
  console.log("Service bindings", c.env, c.env.task_service); // c.env doesn't contain the `task_service` — undefined
  return await toggleComplete(parseInt(id), userId, c, db);
}

function toggleComplete(...) {
// ... stuff to hit db
await c.env.task_service.fetch(
          new Request("https://dummy-url/notify", {
            method: "POST",
            headers: {
              "Content-Type": "application/json",
            },
            body: JSON.stringify({ task: updatedTask[0] }),
          })
        ) : // Other thing but same format

return c.json(updatedTask, 200);
}

Worker B

export class Points extends WorkerEntrypoint {
  async fetch() {
    return new Response(null, { status: 200 });
  }

  async addPoints(task: any) {
// stuff
}

I've read through #3365, and I have tried chaining requests to no avail.

[misraishan]

Resolved — Will update this post soon so others may benefit from my (marginally) better understanding.