Adds rln-relay flag (#347)

* adds rlnrelay flag

* minor edit

* adds the input name

examples/v2/basic2.nim

@@ -23,7 +23,7 @@ proc runBackground() {.async.} =
       Port(uint16(conf.tcpPort) + conf.portsShift), extIp, extTcpPort)
 
   await node.start()
-  await node.mountRelay()
+  await node.mountRelay(rlnRelayEnabled = conf.rlnrelay)
 
   # Subscribe to a topic
   let topic = cast[Topic]("foobar")

examples/v2/chat2.nim

@@ -192,9 +192,9 @@ proc processInput(rfd: AsyncFD, rng: ref BrHmacDrbgContext) {.async.} =
   await node.start()
 
   if conf.filternode != "":
-    await node.mountRelay(conf.topics.split(" "))
+    await node.mountRelay(conf.topics.split(" "), rlnRelayEnabled = conf.rlnrelay)
   else:
-    await node.mountRelay(@[])
+    await node.mountRelay(@[], rlnRelayEnabled = conf.rlnrelay)
 
   var chat = Chat(node: node, transp: transp, subscribed: true, connected: false, started: true)
 

waku/v2/node/config.nim

@@ -62,6 +62,11 @@ type
       desc: "Flag whether to start relay protocol",
       defaultValue: true
       name: "relay" }: bool
+    
+    rlnrelay* {.
+      desc: "Flag whether to enable spam protection through rln-relay",
+      defaultValue: false
+      name: "rlnrelay" }: bool
 
     swap* {.
       desc: "Flag whether to start swap protocol",

waku/v2/node/wakunode2.nim

@@ -296,7 +296,7 @@ proc mountStore*(node: WakuNode, store: MessageStore = nil) =
   node.switch.mount(node.wakuStore)
   node.subscriptions.subscribe(WakuStoreCodec, node.wakuStore.subscription())
 
-proc mountRelay*(node: WakuNode, topics: seq[string] = newSeq[string]()) {.async, gcsafe.} =
+proc mountRelay*(node: WakuNode, topics: seq[string] = newSeq[string](), rlnRelayEnabled: bool = false) {.async, gcsafe.} =
   # TODO add the RLN registration
   let wakuRelay = WakuRelay.init(
     switch = node.switch,
@@ -306,6 +306,13 @@ proc mountRelay*(node: WakuNode, topics: seq[string] = newSeq[string]()) {.async
     sign = false,
     verifySignature = false
   )
+  # TODO if rln-relay enabled, then perform registration
+  if rlnRelayEnabled:
+    debug "Using WakuRLNRelay"
+  else:
+    debug "WakuRLNRelay is disabled"
+
+
 
   node.wakuRelay = wakuRelay
   node.switch.mount(wakuRelay)
@@ -478,7 +485,7 @@ when isMainModule:
     mountFilter(node)
 
   if conf.relay:
-    waitFor mountRelay(node, conf.topics.split(" "))
+    waitFor mountRelay(node, conf.topics.split(" "), rlnRelayEnabled = conf.rlnrelay)
 
   if conf.staticnodes.len > 0:
     waitFor connectToNodes(node, conf.staticnodes)