VersionMetadata

The Version Metadata binding provides access to version information about your Worker at runtime.

Minimal Example

Create a basic version metadata binding:

import { Worker, VersionMetadata } from "alchemy/cloudflare";

const worker = await Worker("versioned-worker", {
  name: "versioned-worker",
  entrypoint: "./src/worker.ts",
  bindings: {
    VERSION: VersionMetadata(),
  },
});

Worker Runtime Usage

Access version information in your Worker:

src/worker.ts

export default {
  async fetch(request: Request, env: any) {
    const version = env.VERSION;

    return new Response(JSON.stringify({
      workerVersion: version.workerVersion,
      deploymentId: version.deploymentId,
      lastDeployedAt: version.lastDeployedAt,
    }), {
      headers: {
        "content-type": "application/json",
      },
    });
  },
};

Available Properties

The version metadata binding provides the following properties at runtime:

• workerVersion: The version tag of the Worker
• deploymentId: A unique identifier for the current deployment
• lastDeployedAt: Timestamp of when the Worker was last deployed