Log more in store protocol (#493)

Makes it easier to see what is going on

waku/v2/protocol/waku_store/waku_store.nim

@@ -338,6 +338,7 @@ method init*(ws: WakuStore) =
       waku_store_errors.inc(labelValues = [decodeRpcFailure])
       return
 
+    # TODO Print more info here
     info "received query"
 
     let value = res.value
@@ -354,6 +355,8 @@ method init*(ws: WakuStore) =
     else:
       info "handle store swap is nil"
 
+    info "sending response", messages=response.messages.len
+
     await conn.writeLp(HistoryRPC(requestId: value.requestId,
         response: response).encode().buffer)
 
@@ -375,6 +378,7 @@ method init*(ws: WakuStore) =
 
 proc init*(T: type WakuStore, peerManager: PeerManager, rng: ref BrHmacDrbgContext,
                    store: MessageStore = nil, wakuSwap: WakuSwap = nil): T =
+  debug "init"
   new result
   result.rng = rng
   result.peerManager = peerManager
@@ -393,6 +397,7 @@ proc subscription*(proto: WakuStore): MessageNotificationSubscription =
   ## the filter should be used by the component that receives
   ## new messages.
   proc handle(topic: string, msg: WakuMessage) {.async.} =
+    debug "subscription handle", topic=topic
     let index = msg.computeIndex()
     proto.messages.add(IndexedWakuMessage(msg: msg, index: index))
     waku_store_messages.inc(labelValues = ["stored"])