Eliminate build warnings in applications.

beacon_chain/beacon_node.nim

@@ -14,6 +14,7 @@ import
 
   # Nimble packages
   chronos, presto, bearssl/rand,
+  metrics, metrics/chronos_httpserver,
 
   # Local modules
   "."/[beacon_clock, beacon_chain_db, conf, light_client],
@@ -86,6 +87,7 @@ type
     elManager*: ELManager
     restServer*: RestServerRef
     keymanagerHost*: ref KeymanagerHost
+    metricsServer*: Opt[MetricsHttpServerRef]
     keymanagerServer*: RestServerRef
     keystoreCache*: KeystoreCacheRef
     eventBus*: EventBus

beacon_chain/nimbus_beacon_node.nim

@@ -8,7 +8,7 @@
 {.push raises: [].}
 
 import
-  std/[os, random, terminal, times],
+  std/[os, random, terminal, times, exitprocs],
   chronos, chronicles,
   metrics, metrics/chronos_httpserver,
   stew/[byteutils, io2],
@@ -2111,6 +2111,8 @@ proc stop(node: BeaconNode) =
   except CatchableError as exc:
     warn "Couldn't stop network", msg = exc.msg
 
+  waitFor node.metricsServer.stopMetricsServer()
+
   node.attachedValidators[].slashingProtection.close()
   node.attachedValidators[].close()
   node.db.close()
@@ -2166,7 +2168,7 @@ var gPidFile: string
 proc createPidFile(filename: string) {.raises: [IOError].} =
   writeFile filename, $os.getCurrentProcessId()
   gPidFile = filename
-  addQuitProc proc {.noconv.} = discard io2.removeFile(gPidFile)
+  addExitProc proc {.noconv.} = discard io2.removeFile(gPidFile)
 
 proc initializeNetworking(node: BeaconNode) {.async.} =
   node.installMessageValidators()
@@ -2378,16 +2380,8 @@ proc doRunBeaconNode(config: var BeaconNodeConf, rng: ref HmacDrbgContext) {.rai
 
   config.createDumpDirs()
 
-  if config.metricsEnabled:
-    let metricsAddress = config.metricsAddress
-    notice "Starting metrics HTTP server",
-      url = "http://" & $metricsAddress & ":" & $config.metricsPort & "/metrics"
-    try:
-      startMetricsHttpServer($metricsAddress, config.metricsPort)
-    except CatchableError as exc:
-      raise exc
-    except Exception as exc:
-      raiseAssert exc.msg # TODO fix metrics
+  let metricsServer = (waitFor config.initMetricsServer()).valueOr:
+    return
 
   # Nim GC metrics (for the main thread) will be collected in onSecond(), but
   # we disable piggy-backing on other metrics here.
@@ -2435,6 +2429,8 @@ proc doRunBeaconNode(config: var BeaconNodeConf, rng: ref HmacDrbgContext) {.rai
 
   let node = waitFor BeaconNode.init(rng, config, metadata)
 
+  node.metricsServer = metricsServer
+
   if bnStatus == BeaconNodeStatus.Stopping:
     return
 

beacon_chain/nimbus_binary_common.nim

@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2024 Status Research & Development GmbH
+# Copyright (c) 2018-2025 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -16,7 +16,7 @@ import
   # Nimble packages
   chronos, confutils, presto, toml_serialization, metrics,
   chronicles, chronicles/helpers as chroniclesHelpers, chronicles/topics_registry,
-  stew/io2,
+  stew/io2, metrics, metrics/chronos_httpserver,
 
   # Local modules
   ./spec/[helpers, keystore],
@@ -448,6 +448,40 @@ proc initKeymanagerServer*(
 
   KeymanagerInitResult(server: keymanagerServer, token: token)
 
+proc initMetricsServer*(
+    config: AnyConf
+): Future[Result[Opt[MetricsHttpServerRef], string]] {.
+  async: (raises: [CancelledError]).} =
+  if config.metricsEnabled:
+    let
+      metricsAddress = config.metricsAddress
+      metricsPort = config.metricsPort
+      url = "http://" & $metricsAddress & ":" & $metricsPort & "/metrics"
+
+    info "Starting metrics HTTP server", url = url
+
+    let server = MetricsHttpServerRef.new($metricsAddress, metricsPort).valueOr:
+      fatal "Could not start metrics HTTP server",
+            url = url, reason = error
+      return err($error)
+
+    try:
+      await server.start()
+    except MetricsError as exc:
+      fatal "Could not start metrics HTTP server",
+            url = url, reason = exc.msg
+      return err(exc.msg)
+
+    ok(Opt.some(server))
+  else:
+    ok(Opt.none(MetricsHttpServerRef))
+
+proc stopMetricsServer*(v: Opt[MetricsHttpServerRef]) {.
+     async: (raises: []).} =
+  if v.isSome():
+    info "Shutting down metrics HTTP server"
+    await v.get().close()
+
 proc quitDoppelganger*() =
   # Avoid colliding with
   # https://www.freedesktop.org/software/systemd/man/systemd.exec.html#Process%20Exit%20Codes

beacon_chain/nimbus_signing_node.nim

@@ -1,5 +1,5 @@
 # nimbus_signing_node
-# Copyright (c) 2018-2024 Status Research & Development GmbH
+# Copyright (c) 2018-2025 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -414,7 +414,7 @@ proc asyncInit(sn: SigningNodeRef) {.async: (raises: [SigningNodeError]).} =
         raise newException(SigningNodeError, "")
       SigningNodeServer(kind: SigningNodeKind.NonSecure, nserver: res.get())
 
-proc asyncRun*(sn: SigningNodeRef) {.async: (raises: []).} =
+proc asyncRun*(sn: SigningNodeRef) {.async: (raises: [SigningNodeError]).} =
   sn.runKeystoreCachePruningLoopFut =
     runKeystoreCachePruningLoop(sn.keystoreCache)
   sn.installApiHandlers()
@@ -429,6 +429,11 @@ proc asyncRun*(sn: SigningNodeRef) {.async: (raises: []).} =
     warn "Main loop failed with unexpected error", err_name = $exc.name,
          reason = $exc.msg
 
+  # This is trick to fool `asyncraises` from generating warning:
+  # No exceptions possible with this operation, `error` always returns nil.
+  if false:
+    raise newException(SigningNodeError, "This error should never happen")
+
   debug "Stopping main processing loop"
   var pending: seq[Future[void]]
   if not(sn.runKeystoreCachePruningLoopFut.finished()):

beacon_chain/nimbus_validator_client.nim

@@ -1,5 +1,5 @@
 # beacon_chain
-# Copyright (c) 2018-2024 Status Research & Development GmbH
+# Copyright (c) 2018-2025 Status Research & Development GmbH
 # Licensed and distributed under either of
 #   * MIT license (license terms in the root directory or at https://opensource.org/licenses/MIT).
 #   * Apache v2 license (license terms in the root directory or at https://www.apache.org/licenses/LICENSE-2.0).
@@ -161,38 +161,6 @@ proc initClock(
          current_slot = currentSlot, current_epoch = currentEpoch
   res
 
-proc initMetrics(
-    vc: ValidatorClientRef
-): Future[bool] {.async: (raises: [CancelledError]).} =
-  if vc.config.metricsEnabled:
-    let
-      metricsAddress = vc.config.metricsAddress
-      metricsPort = vc.config.metricsPort
-      url = "http://" & $metricsAddress & ":" & $metricsPort & "/metrics"
-    info "Starting metrics HTTP server", url = url
-    let server =
-      block:
-        let res = MetricsHttpServerRef.new($metricsAddress, metricsPort)
-        if res.isErr():
-          error "Could not start metrics HTTP server", url = url,
-                error_msg = res.error()
-          return false
-        res.get()
-    vc.metricsServer = Opt.some(server)
-    try:
-      await server.start()
-    except MetricsError as exc:
-      error "Could not start metrics HTTP server", url = url,
-            error_msg = exc.msg, error_name = exc.name
-      return false
-  true
-
-proc shutdownMetrics(vc: ValidatorClientRef) {.async: (raises: []).} =
-  if vc.config.metricsEnabled:
-    if vc.metricsServer.isSome():
-      info "Shutting down metrics HTTP server"
-      await vc.metricsServer.get().close()
-
 proc shutdownSlashingProtection(vc: ValidatorClientRef) =
   info "Closing slashing protection", path = vc.config.validatorsDir()
   vc.attachedValidators[].slashingProtection.close()
@@ -351,7 +319,7 @@ proc asyncInit(vc: ValidatorClientRef): Future[ValidatorClientRef] {.
 
   vc.beaconClock = await vc.initClock()
 
-  if not(await initMetrics(vc)):
+  vc.metricsServer = (await vc.config.initMetricsServer()).valueOr:
     raise newException(ValidatorClientError,
                        "Could not initialize metrics server")
 
@@ -368,7 +336,7 @@ proc asyncInit(vc: ValidatorClientRef): Future[ValidatorClientRef] {.
   vc.attachedValidators = validatorPool
 
   if not(await initValidators(vc)):
-    await vc.shutdownMetrics()
+    await vc.metricsServer.stopMetricsServer()
     raise newException(ValidatorClientError,
                        "Could not initialize local validators")
 
@@ -432,7 +400,7 @@ proc asyncInit(vc: ValidatorClientRef): Future[ValidatorClientRef] {.
         )
   except CancelledError:
     debug "Initialization process interrupted"
-    await vc.shutdownMetrics()
+    await vc.metricsServer.stopMetricsServer()
     vc.shutdownSlashingProtection()
     return
 
@@ -522,7 +490,7 @@ proc asyncRun*(
   except CancelledError:
     debug "Main loop interrupted"
 
-  await vc.shutdownMetrics()
+  await vc.metricsServer.stopMetricsServer()
   vc.shutdownSlashingProtection()
 
   if doppelEventFut.completed():