DrandConnectionFailure

A chain-side invariant failed; nothing to fix client-side — report it if it persists

Declared for failures reaching the drand HTTP API, but pulse fetching happens in the offchain worker, which logs errors instead of raising this. Check the node's offchain worker logs and outbound connectivity to the drand endpoints.

Declared by the Drand pallet; it classifies to the semantic code internal.

Remediation

A chain-side invariant failed; nothing to fix client-side — report it if it persists

The same explanation is available in the terminal: btcli explain DrandConnectionFailure.