handle nil

x/ccv/provider/ibc_middleware.go

@@ -115,12 +115,13 @@ func (im IBCMiddleware) OnRecvPacket(
 ) exported.Acknowledgement {
 	// executes the IBC transfer OnRecv logic
 	ack := im.app.OnRecvPacket(ctx, packet, relayer)
+	ctx.Logger().Info("OnRecvPacket", "ack", ack)
 
 	// Note that inside the below if condition statement,
 	// we know that the IBC transfer succeeded. That entails
 	// that the packet data is valid and can be safely
 	// deserialized without checking errors.
-	if ack.Success() {
+	if ack == nil || ack.Success() {
 		// execute the middleware logic only if the sender is a consumer chain
 		consumerID, err := im.keeper.IdentifyConsumerChainIDFromIBCPacket(ctx, packet)
 		if err != nil {