multi: wrap all errors

chainntnfs/btcdnotify/btcd.go

@@ -886,8 +886,8 @@ func (b *BtcdNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint,
 		// proceed with fallback methods.
 		jsonErr, ok := err.(*btcjson.RPCError)
 		if !ok || jsonErr.Code != btcjson.ErrRPCNoTxInfo {
-			return nil, fmt.Errorf("unable to query for txid %v: %v",
-				outpoint.Hash, err)
+			return nil, fmt.Errorf("unable to query for txid %v: "+
+				"%w", outpoint.Hash, err)
 		}
 	}