Update announced addrs in switch (#784)

tests/v2/test_wakunode.nim

@@ -1388,4 +1388,38 @@ asyncTest "Messages are relayed between nodes with multiple transports (websocke
     check:
       (await completionFut.withTimeout(5.seconds)) == true
     await node1.stop()
-    await node2.stop()
+    await node2.stop()
+  
+asyncTest "Peer info updates with correct announced addresses":
+  let
+    nodeKey = crypto.PrivateKey.random(Secp256k1, rng[])[]
+    bindIp = ValidIpAddress.init("0.0.0.0")
+    bindPort = Port(60000)
+    extIp = some(ValidIpAddress.init("127.0.0.1"))
+    extPort = some(Port(60002))
+    node = WakuNode.new(
+      nodeKey,
+      bindIp, bindPort,
+      extIp, extPort)
+     
+  let
+    bindEndpoint = MultiAddress.init(bindIp, tcpProtocol, bindPort)
+    announcedEndpoint = MultiAddress.init(extIp.get(), tcpProtocol, extPort.get())
+
+  check:
+    # Check that underlying peer info contains only bindIp before starting
+    node.switch.peerInfo.addrs.len == 1
+    node.switch.peerInfo.addrs.contains(bindEndpoint)
+    
+    node.announcedAddresses.len == 1
+    node.announcedAddresses.contains(announcedEndpoint)
+      
+  await node.start()
+
+  check:
+    # Check that underlying peer info is updated with announced address
+    node.started
+    node.switch.peerInfo.addrs.len == 1
+    node.switch.peerInfo.addrs.contains(announcedEndpoint)
+
+  await node.stop()

waku/v2/node/wakunode2.nim

@@ -125,6 +125,22 @@ proc removeContentFilters(filters: var Filters, contentFilters: seq[ContentFilte
   
   debug "filters modified", filters=filters
 
+proc updateSwitchPeerInfo(node: WakuNode) =
+  ## TODO: remove this when supported upstream
+  ## 
+  ## nim-libp2p does not yet support announcing addrs
+  ## different from bound addrs.
+  ## 
+  ## This is a temporary workaround to replace
+  ## peer info addrs in switch to announced
+  ## addresses.
+  ## 
+  ## WARNING: this should only be called once the switch
+  ## has already been started.
+  
+  if node.announcedAddresses.len > 0:
+    node.switch.peerInfo.addrs = node.announcedAddresses
+
 template tcpEndPoint(address, port): auto =
   MultiAddress.init(address, tcpProtocol, port)
 
@@ -839,6 +855,9 @@ proc start*(node: WakuNode) {.async.} =
   info "Listening on", full = listenStr
   info "Discoverable ENR ", enr = node.enr.toURI()
 
+  ## Update switch peer info with announced addrs
+  node.updateSwitchPeerInfo()
+
   if not node.wakuRelay.isNil:
     await node.startRelay()