Updated protobuf files for floodsub (#70)

* chore: cleaned up topic descriptor protobuf

* feat: updated rpc protobuf to current spec

* chore: fixed typo in topic descriptor protobuf

Author: Mikerah

src/message/rpc.proto.js

@@ -13,6 +13,8 @@ message RPC {
     optional bytes from = 1;
     optional bytes data = 2;
     optional bytes seqno = 3;
-    repeated string topicIDs = 4; 
+    repeated string topicIDs = 4;
+    optional bytes signature = 5;
+    optional bytes key = 6;
   }
 }`

src/message/topic-descriptor.proto.js

@@ -1,10 +1,9 @@
 'use strict'
 module.exports = `
-// topicCID = cid(merkledag_protobuf(topicDescriptor)); (not the topic.name)
 message TopicDescriptor {
   optional string name = 1;
   optional AuthOpts auth = 2;
-  optional EncOpts enc = 2;
+  optional EncOpts enc = 3;
 
   message AuthOpts {
     optional AuthMode mode = 1;