chengxilo commented on code in PR #1916:
URL: https://github.com/apache/iggy/pull/1916#discussion_r2181530658


##########
foreign/go/binary_serialization/binary_request_serializer.go:
##########
@@ -24,32 +24,41 @@ import (
 )
 
 func CreateGroup(request CreateConsumerGroupRequest) []byte {
+       if request.ConsumerGroupId == nil {
+               request.ConsumerGroupId = new(uint32)
+       }
        customIdOffset := 4 + request.StreamId.Length + request.TopicId.Length
        bytes := make([]byte, 
4+request.StreamId.Length+request.TopicId.Length+1+4+len(request.Name))
        copy(bytes[0:customIdOffset], SerializeIdentifiers(request.StreamId, 
request.TopicId))
-       binary.LittleEndian.PutUint32(bytes[customIdOffset:customIdOffset+4], 
uint32(request.ConsumerGroupId))
+       binary.LittleEndian.PutUint32(bytes[customIdOffset:customIdOffset+4], 
*request.ConsumerGroupId)
        bytes[customIdOffset+4] = byte(len(request.Name))
-       copy(bytes[customIdOffset+5:], []byte(request.Name))
+       copy(bytes[customIdOffset+5:], request.Name)
        return bytes
 }
 
-func UpdateOffset(request StoreOffsetRequest) []byte {
+func UpdateOffset(request StoreConsumerOffsetRequest) []byte {
+       if request.PartitionId == nil {
+               request.PartitionId = new(uint32)
+       }

Review Comment:
   when the partitionId is nil, assign it with `new(uint32)` i.e. 0. For all of 
optional arguments like this. When we do the serialization, I give them a 
default value the same as rust sdk.



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