deadLetterTopic property
The name of the topic to which dead letter messages should be published. Format is 'projects/{project}/topics/{topic}'.
The Cloud Pub/Sub service account associated with the enclosing subscription's parent project (i.e., service-{project_number}@gcp-sa-pubsub.iam.gserviceaccount.com) must have permission to Publish() to this topic.
The operation will fail if the topic does not exist. Users should ensure that there is a subscription attached to this topic since messages published to a topic with no subscriptions are lost.
Implementation
final pulumi.Input<String> deadLetterTopic;