Fix chronos related deprecated warnings in discv5 and uTP (#667)

* Fix chronos related deprecated warnings in discv5

* Fix chronos related deprecated warnings in uTP code

* Improve discv5 closeWait order of events and add noCancel

eth.nimble

@@ -24,7 +24,6 @@ let commonParams =
   " --warning[ObservableStores]:off" &
   " --styleCheck:usages --styleCheck:error" &
   " " & getEnv("NIMFLAGS") &
-  " -d:chronosStrictException" &
   " -d:chronicles_log_level=TRACE"
 
 proc runTest(path: string, release: bool = true) =

eth/p2p/discoveryv5/protocol.nim

@@ -468,7 +468,7 @@ proc receive*(d: Protocol, a: Address, packet: openArray[byte]) =
     trace "Packet decoding error", error = decoded.error, address = a
 
 proc processClient(transp: DatagramTransport, raddr: TransportAddress):
-    Future[void] {.async.} =
+    Future[void] {.async: (raises: []).} =
   let proto = getUserData[Protocol](transp)
 
   # TODO: should we use `peekMessage()` to avoid allocation?
@@ -1036,28 +1036,20 @@ proc start*(d: Protocol) =
   d.revalidateLoop = revalidateLoop(d)
   d.ipMajorityLoop = ipMajorityLoop(d)
 
-proc close*(d: Protocol) =
+proc closeWait*(d: Protocol) {.async: (raises: []).} =
   doAssert(not d.transp.closed)
 
   debug "Closing discovery node", node = d.localNode
+  var futures: seq[Future[void]]
   if not d.revalidateLoop.isNil:
-    d.revalidateLoop.cancel()
+    futures.add(d.revalidateLoop.cancelAndWait())
   if not d.refreshLoop.isNil:
-    d.refreshLoop.cancel()
+    futures.add(d.refreshLoop.cancelAndWait())
   if not d.ipMajorityLoop.isNil:
-    d.ipMajorityLoop.cancel()
+    futures.add(d.ipMajorityLoop.cancelAndWait())
 
-  d.transp.close()
+  await noCancel(allFutures(futures))
+  await noCancel(d.transp.closeWait())
 
-proc closeWait*(d: Protocol) {.async.} =
-  doAssert(not d.transp.closed)
-
-  debug "Closing discovery node", node = d.localNode
-  if not d.revalidateLoop.isNil:
-    await d.revalidateLoop.cancelAndWait()
-  if not d.refreshLoop.isNil:
-    await d.refreshLoop.cancelAndWait()
-  if not d.ipMajorityLoop.isNil:
-    await d.ipMajorityLoop.cancelAndWait()
-
-  await d.transp.closeWait()
+proc close*(d: Protocol) {.deprecated: "Please use closeWait() instead".} =
+  asyncSpawn d.closeWait()

eth/utp/utp_socket.nim

@@ -738,7 +738,7 @@ proc destroy*(s: UtpSocket) =
   ## Moves socket to destroy state and clean all resources.
   ## Remote is not notified in any way about socket end of life.
   s.state = Destroy
-  s.eventLoop.cancel()
+  s.eventLoop.cancelSoon()
   # This procedure initiate cleanup process which goes like:
   # Cancel EventLoop -> Cancel timeoutsLoop -> Fire closeEvent
   # This is necessary due to how evenLoop look like i.e it has only one await
@@ -1762,7 +1762,7 @@ proc eventLoop(socket: UtpSocket) {.async.} =
     socket.pendingWrites.clear()
     socket.pendingReads.clear()
     # main eventLoop has been cancelled, try to cancel `checkTimeoutsLoop`
-    socket.checkTimeoutsLoop.cancel()
+    socket.checkTimeoutsLoop.cancelSoon()
     trace "main socket event loop cancelled"
     raise exc
 

tests/utp/test_utp_socket.nim

@@ -48,7 +48,7 @@ procSuite "uTP socket":
       initialPacket.header.wndSize == defaultConfig.optRcvBuffer
 
     await socket.destroyWait()
-    fut.cancel()
+    fut.cancelSoon()
 
   asyncTest "Outgoing socket should re-send SYN packet 2 times before declaring failure":
     let q = newAsyncQueue[Packet]()
@@ -82,7 +82,7 @@ procSuite "uTP socket":
       not socket.isConnected()
 
     await socket.destroyWait()
-    fut1.cancel()
+    fut1.cancelSoon()
 
   asyncTest "Processing in order ack should make socket connected":
     let q = newAsyncQueue[Packet]()

tools/dcli.nim

@@ -183,7 +183,7 @@ proc discover(d: discv5_protocol.Protocol, psFile: string) {.async.} =
       let newLine = str % [pubkey.get().toHex, dNode.id.toHex, forkDigest[0..3].toHex, $dNode.address.get(), attnets.get().toHex, $bits]
 
       ps.write(newLine)
-    await sleepAsync(1000) # 1 sec of delay
+    await sleepAsync(1.seconds) # 1 sec of delay
 
 
 proc run(config: DiscoveryConf) {.raises: [CatchableError].} =