enhancement/integrate-store-chat (#230)

* added store protocol

* setting peer

* fix

* line

* Update dingpu.md

* Update chat2.nim

* Update dingpu.md

* Update dingpu.md

* playing around

* fix

* fix

* fixes

* tested

* tested and finalized

* fix

* Update docs/tutorial/dingpu.md

Co-authored-by: Oskar Thorén <ot@oskarthoren.com>

* Update chat2.nim

* fix

Co-authored-by: Oskar Thorén <ot@oskarthoren.com>

docs/tutorial/dingpu.md

@@ -2,11 +2,13 @@
 
 ## Basic chat usage
 
+> If historical messaging is desired, the chat app requires that the remote peer specified in `storenode` option supports the WakuStore protocol. For the current cluster node deployed as part of Dingpu this is already the case.
+
 Start two chat apps:
 
 ```
-./build/chat2 --ports-shift=0 --staticnode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS
-./build/chat2 --ports-shift=1 --staticnode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS
+./build/chat2 --ports-shift:0 --storenode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS --staticnode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS
+./build/chat2 --ports-shift:1 --storenode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS --staticnode:/ip4/134.209.139.210/tcp/60000/p2p/16Uiu2HAmJb2e28qLXxT5kZxVUUoJt72EMzNGXB47Rxx5hw3q4YjS
 ```
 
 By specifying `staticnode` it connects to that node subscribes to the `waku` topic. This ensures messages are relayed properly.

examples/v2/chat2.nim

@@ -19,7 +19,7 @@ import libp2p/[switch,                   # manage transports, a single entry poi
                muxers/muxer,             # define an interface for stream multiplexing, allowing peers to offer many protocols over a single connection
                muxers/mplex/mplex]       # define some contants and message types for stream multiplexing
 import   ../../waku/node/v2/[config, wakunode2, waku_types],
-         ../../waku/protocol/v2/waku_relay,
+         ../../waku/protocol/v2/[waku_relay, waku_store],
          ../../waku/node/common
 
 const Help = """
@@ -55,15 +55,17 @@ proc initAddress(T: type MultiAddress, str: string): T =
     raise newException(ValueError,
                          "Invalid bootstrap node multi-address")
 
-# NOTE Dialing on WakuRelay specifically
-proc dialPeer(c: Chat, address: string) {.async.} =
+proc parsePeer(address: string): PeerInfo = 
   let multiAddr = MultiAddress.initAddress(address)
   let parts = address.split("/")
-  let remotePeer = PeerInfo.init(parts[^1], [multiAddr])
+  result = PeerInfo.init(parts[^1], [multiAddr])
 
-  echo &"dialing peer: {multiAddr}"
+# NOTE Dialing on WakuRelay specifically
+proc dialPeer(c: Chat, address: string) {.async.} =
+  let peer = parsePeer(address)
+  echo &"dialing peer: {peer.peerId}"
   # XXX Discarding conn, do we want to keep this here?
-  discard await c.node.switch.dial(remotePeer, WakuRelayCodec)
+  discard await c.node.switch.dial(peer, WakuRelayCodec)
   c.connected = true
 
 proc connectToNodes(c: Chat, nodes: openArray[string]) =
@@ -172,10 +174,20 @@ proc processInput(rfd: AsyncFD, rng: ref BrHmacDrbgContext) {.async.} =
   let listenStr = $peerInfo.addrs[0] & "/p2p/" & $peerInfo.peerId
   echo &"Listening on\n {listenStr}"
 
+  if conf.storenode != "":
+    node.wakuStore.setPeer(parsePeer(conf.storenode))
+
+    proc storeHandler(response: HistoryResponse) {.gcsafe.} =
+      for msg in response.messages:
+        let payload = cast[string](msg.payload)
+        echo &"{payload}"
+      info "Hit store handler"
+
+    await node.query(HistoryQuery(topics: @[DefaultContentTopic]), storeHandler)
+
   # Subscribe to a topic
   # TODO To get end to end sender would require more information in payload
   # We could possibly indicate the relayer point with connection somehow probably (?)
-  let topic = cast[Topic](DefaultTopic)
   proc handler(topic: Topic, data: seq[byte]) {.async, gcsafe.} =
     let message = WakuMessage.init(data).value
     let payload = cast[string](message.payload)
@@ -184,6 +196,7 @@ proc processInput(rfd: AsyncFD, rng: ref BrHmacDrbgContext) {.async.} =
 
   # XXX Timing issue with subscribe, need to wait a bit to ensure GRAFT message is sent
   await sleepAsync(5.seconds)
+  let topic = cast[Topic](DefaultTopic)
   await node.subscribe(topic, handler)
 
   await chat.readWriteLoop()

waku/node/v2/wakunode2.nim

@@ -133,6 +133,7 @@ proc start*(node: WakuNode) {.async.} =
     let msg = WakuMessage.init(data)
     if msg.isOk():
       node.filters.notify(msg.value(), "")
+      await node.subscriptions.notify(topic, msg.value())
 
   await node.wakuRelay.subscribe("waku", relayHandler)