recovery

func New ¶

func New(ctx context.Context, newBackoff func() backoff.BackOff) telegram.Middleware

New returns a recovery middleware.

newBackoff is a factory that must return a fresh backoff.BackOff on every call: backoff implementations in cenkalti/backoff/v4 (notably ExponentialBackOff) are not safe for concurrent use, and the Telegram client invokes RPCs from many goroutines in parallel.

Sharing a single instance corrupts its internal counters, breaks the exponential interval, and defeats MaxElapsedTime - see issue #218.