Feat/peer manager improvements (#367)

* Add managed peers to Admin API result

* Deal with dial failures

tests/v2/test_jsonrpc_waku.nim

@@ -18,6 +18,7 @@ import
                               admin_api,
                               private_api],
   ../../waku/v2/protocol/message_notifier,
+  ../../waku/v2/protocol/waku_relay,
   ../../waku/v2/protocol/waku_store/waku_store,
   ../../waku/v2/protocol/waku_swap/waku_swap,
   ../../waku/v2/protocol/waku_filter/waku_filter,
@@ -366,7 +367,59 @@ procSuite "Waku v2 JSON-RPC API":
     server.close()
     waitfor node.stop()
   
-  asyncTest "Admin API: get peer information":
+  asyncTest "Admin API: get managed peer information":
+    # Create a couple of nodes
+    let
+      nodeKey1 = crypto.PrivateKey.random(Secp256k1, rng[])[]
+      node1 = WakuNode.init(nodeKey1, ValidIpAddress.init("0.0.0.0"),
+        Port(60000))
+      nodeKey2 = crypto.PrivateKey.random(Secp256k1, rng[])[]
+      node2 = WakuNode.init(nodeKey2, ValidIpAddress.init("0.0.0.0"),
+        Port(60002))
+      peerInfo2 = node2.peerInfo
+      nodeKey3 = crypto.PrivateKey.random(Secp256k1, rng[])[]
+      node3 = WakuNode.init(nodeKey3, ValidIpAddress.init("0.0.0.0"),
+        Port(60004))
+      peerInfo3 = node3.peerInfo
+    
+    await allFutures([node1.start(), node2.start(), node3.start()])
+
+    node1.mountRelay()
+    node2.mountRelay()
+    node3.mountRelay()
+
+    # Dial nodes 2 and 3 from node1
+    await node1.dialPeer(constructMultiaddrStr(peerInfo2))
+    await node1.dialPeer(constructMultiaddrStr(peerInfo3))
+
+    # RPC server setup
+    let
+      rpcPort = Port(8545)
+      ta = initTAddress(bindIp, rpcPort)
+      server = newRpcHttpServer([ta])
+
+    installAdminApiHandlers(node1, server)
+    server.start()
+
+    let client = newRpcHttpClient()
+    await client.connect("127.0.0.1", rpcPort)
+
+    let response = await client.get_waku_v2_admin_v1_peers()
+
+    check:
+      response.len == 2
+      # Check peer 2
+      response.anyIt(it.protocol == WakuRelayCodec and
+                     it.multiaddr == constructMultiaddrStr(peerInfo2))
+      # Check peer 3
+      response.anyIt(it.protocol == WakuRelayCodec and
+                     it.multiaddr == constructMultiaddrStr(peerInfo3))
+
+    server.stop()
+    server.close()
+    await allFutures([node1.stop(), node2.stop(), node3.stop()])
+  
+  asyncTest "Admin API: get unmanaged peer information":
     const cTopic = ContentTopic(1)
 
     waitFor node.start()

tests/v2/test_peer_manager.nim

@@ -15,7 +15,7 @@ import
   ../test_helpers
 
 procSuite "Peer Manager":
-  asyncTest "Peer dialing":
+  asyncTest "Peer dialing works":
     let
       nodeKey1 = crypto.PrivateKey.random(Secp256k1, rng[])[]
       node1 = WakuNode.init(nodeKey1, ValidIpAddress.init("0.0.0.0"),
@@ -31,7 +31,7 @@ procSuite "Peer Manager":
     node2.mountRelay()
 
     # Dial node2 from node1
-    let conn = await node1.peerManager.dialPeer(peerInfo2, WakuRelayCodec)
+    let conn = (await node1.peerManager.dialPeer(peerInfo2, WakuRelayCodec)).get()
 
     # Check connection
     check:
@@ -45,4 +45,30 @@ procSuite "Peer Manager":
     # Check connectedness
     check:
       node1.peerManager.connectedness(peerInfo2.peerId)
+    
+    await allFutures([node1.stop(), node2.stop()])
+  
+  asyncTest "Dialing fails gracefully":
+    let
+      nodeKey1 = crypto.PrivateKey.random(Secp256k1, rng[])[]
+      node1 = WakuNode.init(nodeKey1, ValidIpAddress.init("0.0.0.0"),
+        Port(60000))
+      nodeKey2 = crypto.PrivateKey.random(Secp256k1, rng[])[]
+      node2 = WakuNode.init(nodeKey2, ValidIpAddress.init("0.0.0.0"),
+        Port(60002))
+      peerInfo2 = node2.peerInfo
+    
+    await node1.start()
+    # Purposefully don't start node2
 
+    node1.mountRelay()
+    node2.mountRelay()
+
+    # Dial node2 from node1
+    let connOpt = await node1.peerManager.dialPeer(peerInfo2, WakuRelayCodec, 2.seconds)
+
+    # Check connection failed gracefully
+    check:
+      connOpt.isNone()
+    
+    await node1.stop()

waku/v2/node/jsonrpc/admin_api.nim

@@ -1,20 +1,25 @@
 {.push raises: [Exception, Defect].}
 
 import
-  std/[options,sequtils],
+  std/[options, sequtils, sets],
   json_rpc/rpcserver,
   libp2p/[peerinfo, switch],
   ../../protocol/waku_store/[waku_store_types, waku_store],
   ../../protocol/waku_swap/[waku_swap_types, waku_swap],
   ../../protocol/waku_filter/[waku_filter_types, waku_filter],
   ../wakunode2,
+  ../peer_manager,
   ./jsonrpc_types
 
 export jsonrpc_types
 
+proc constructMultiaddrStr*(wireaddr: MultiAddress, peerId: PeerId): string =
+  # Constructs a multiaddress with both wire address and p2p identity
+  $wireaddr & "/p2p/" & $peerId
+
 proc constructMultiaddrStr*(peerInfo: PeerInfo): string =
-  # Constructs a multiaddress with both location address and p2p identity
+  # Constructs a multiaddress with both location (wire) address and p2p identity
-  $peerInfo.addrs[0] & "/p2p/" & $peerInfo.peerId
+  constructMultiaddrStr(peerInfo.addrs[0], peerInfo.peerId)
 
 proc installAdminApiHandlers*(node: WakuNode, rpcsrv: RpcServer) =
 
@@ -29,6 +34,18 @@ proc installAdminApiHandlers*(node: WakuNode, rpcsrv: RpcServer) =
 
     var wPeers: seq[WakuPeer] = @[]
 
+    ## Managed peers
+
+    if not node.wakuRelay.isNil:
+      # Map all managed peers to WakuPeers and add to return list
+      wPeers.insert(node.peerManager.peers.mapIt(WakuPeer(multiaddr: constructMultiaddrStr(toSeq(it.addrs.items)[0], it.peerId),
+                                                          protocol: toSeq(it.protos.items)[0],
+                                                          connected: node.peerManager.connectedness(it.peerId))),
+                    wPeers.len) # Append to the end of the sequence
+
+    ## Unmanaged peers
+    ## @TODO add these peers to peer manager
+    
     if not node.wakuSwap.isNil:
       # Map WakuSwap peers to WakuPeers and add to return list
       wPeers.insert(node.wakuSwap.peers.mapIt(WakuPeer(multiaddr: constructMultiaddrStr(it.peerInfo),

waku/v2/node/peer_manager.nim

@@ -1,15 +1,26 @@
 {.push raises: [Defect, Exception].}
 
 import
-  chronos, chronicles,
+  std/options,
+  chronos, chronicles, metrics,
   libp2p/standard_setup,
   libp2p/peerstore
 
+export peerstore, standard_setup
+
+declareCounter waku_peers_dials, "Number of peer dials", ["outcome"]
+
+logScope:
+  topics = "wakupeers"
+
 type
   PeerManager* = ref object of RootObj
     switch*: Switch
     peerStore*: PeerStore
 
+const
+  defaultDialTimeout = 1.minutes # @TODO should this be made configurable?
+
 proc new*(T: type PeerManager, switch: Switch): PeerManager =
   T(switch: switch,
     peerStore: PeerStore.new())
@@ -18,7 +29,7 @@ proc new*(T: type PeerManager, switch: Switch): PeerManager =
 # Dialer interface #
 ####################
 
-proc dialPeer*(pm: PeerManager, peerInfo: PeerInfo, proto: string): Future[Connection] {.async.} =
+proc dialPeer*(pm: PeerManager, peerInfo: PeerInfo, proto: string, dialTimeout = defaultDialTimeout): Future[Option[Connection]] {.async.} =
   # Dial a given peer and add it to the list of known peers
   # @TODO check peer validity, duplicates and score before continuing. Limit number of peers to be managed.
   
@@ -43,7 +54,25 @@ proc dialPeer*(pm: PeerManager, peerInfo: PeerInfo, proto: string): Future[Conne
 
   # Dial Peer
   # @TODO Keep track of conn and connected state in peer store
-  return await pm.switch.dial(peerInfo.peerId, peerInfo.addrs, proto)
+  let dialFut = pm.switch.dial(peerInfo.peerId, peerInfo.addrs, proto)
+
+  try:
+    # Attempt to dial remote peer
+    if (await dialFut.withTimeout(dialTimeout)):
+      waku_peers_dials.inc(labelValues = ["successful"])
+      return some(dialFut.read())
+    else:
+      # @TODO any redial attempts?
+      # @TODO indicate CannotConnect on peer metadata
+      debug "Dialing remote peer timed out"
+      waku_peers_dials.inc(labelValues = ["timeout"])
+      return none(Connection)
+  except CatchableError as e:
+    # @TODO any redial attempts?
+    # @TODO indicate CannotConnect on peer metadata
+    debug "Dialing remote peer failed", msg = e.msg
+    waku_peers_dials.inc(labelValues = ["failed"])
+    return none(Connection)
 
 #####################
 # Manager interface #