[Fixes: #2068] Pass topics for mailserver

We were not actually passing the topics in the request, therefore we
were using bloom filter for query, which resulted in long syncing times
for some users.

VERSION

@@ -1 +1 @@
-0.64.1
+0.64.2

services/ext/api.go

@@ -597,9 +597,12 @@ func MakeMessagesRequestPayload(r MessagesRequest) ([]byte, error) {
 	}
 
 	payload := mailserver.MessagesRequestPayload{
-		Lower:  r.From,
-		Upper:  r.To,
+		Lower: r.From,
+		Upper: r.To,
+		// We need to pass bloom filter for
+		// backward compatibility
 		Bloom:  createBloomFilter(r),
+		Topics: topicsToByteArray(r.Topics),
 		Limit:  r.Limit,
 		Cursor: cursor,
 		// Client must tell the MailServer if it supports batch responses.
@@ -610,6 +613,16 @@ func MakeMessagesRequestPayload(r MessagesRequest) ([]byte, error) {
 	return rlp.EncodeToBytes(payload)
 }
 
+func topicsToByteArray(topics []types.TopicType) [][]byte {
+
+	var response [][]byte
+	for idx := range topics {
+		response = append(response, topics[idx][:])
+	}
+
+	return response
+}
+
 func createBloomFilter(r MessagesRequest) []byte {
 	if len(r.Topics) > 0 {
 		return topicsToBloom(r.Topics...)