Worker Versions

Read version metadata (id, tag, timestamp) of the running worker version.

The version metadata binding exposes metadata about the worker version serving the current request — useful for version-aware logging and gradual deployments. The exp/cloudflare/versions package decodes it.

Declare the binding

[version_metadata]
binding = "CF_VERSION_METADATA"

Read the metadata

versions.NewWorkerVersionMetadata resolves the binding and returns a WorkerVersionMetadata struct with ID, Tag, and Timestamp fields.

import "github.com/syumai/workers-go/exp/cloudflare/versions"

meta, err := versions.NewWorkerVersionMetadata("CF_VERSION_METADATA")
if err != nil {
	return err
}

fmt.Println(meta.ID, meta.Tag, meta.Timestamp)