avoid json-rpc server import (#5649)

beacon_chain/beacon_node.nim

@@ -11,7 +11,7 @@ import
   std/osproc,
 
   # Nimble packages
-  chronos, json_rpc/servers/httpserver, presto, bearssl/rand,
+  chronos, presto, bearssl/rand,
 
   # Local modules
   "."/[beacon_clock, beacon_chain_db, conf, light_client],
@@ -30,7 +30,7 @@ import
   ./rpc/state_ttl_cache
 
 export
-  osproc, chronos, httpserver, presto, action_tracker,
+  osproc, chronos, presto, action_tracker,
   beacon_clock, beacon_chain_db, conf, light_client,
   attestation_pool, sync_committee_msg_pool, validator_pool,
   eth2_network, el_manager, request_manager, sync_manager,

beacon_chain/conf.nim

@@ -1324,10 +1324,10 @@ func runAsService*(config: BeaconNodeConf): bool =
     false
 
 func web3SignerUrls*(conf: AnyConf): seq[Web3SignerUrl] =
-  for url in conf.web3signers:
+  for url in conf.web3Signers:
     result.add Web3SignerUrl(url: url)
 
-  for url in conf.verifyingWeb3signers:
+  for url in conf.verifyingWeb3Signers:
     result.add Web3SignerUrl(url: url,
                              provenBlockProperties: conf.provenBlockProperties)
 

beacon_chain/nimbus_beacon_node.nim

@@ -92,12 +92,6 @@ when defined(windows):
                                   lpHandlerProc: LPHANDLER_FUNCTION): SERVICE_STATUS_HANDLE{.
     stdcall, dynlib: "advapi32", importc: "RegisterServiceCtrlHandlerA".}
 
-type
-  RpcServer = RpcHttpServer
-
-template init(T: type RpcHttpServer, ip: ValidIpAddress, port: Port): T =
-  newRpcHttpServer([initTAddress(ip, port)])
-
 # https://github.com/ethereum/eth2.0-metrics/blob/master/metrics.md#interop-metrics
 declareGauge beacon_slot, "Latest slot of the beacon chain state"
 declareGauge beacon_current_epoch, "Current epoch"
@@ -517,7 +511,7 @@ proc init*(T: type BeaconNode,
            rng: ref HmacDrbgContext,
            config: BeaconNodeConf,
            metadata: Eth2NetworkMetadata): Future[BeaconNode]
-          {.async, raises: [CatchableError].} =
+          {.async.} =
   var taskpool: TaskPoolPtr
 
   template cfg: auto = metadata.cfg

beacon_chain/rpc/rest_beacon_api.nim

@@ -336,7 +336,6 @@ proc installBeaconApiHandlers*(router: var RestRouter, node: BeaconNode) =
        ): RestApiResponse =
     node.withStateForBlockSlotId(bslot):
       let
-        validatorsCount = lenu64(getStateField(state, validators))
         indices = node.getIndices(validatorIds, state).valueOr:
           return RestApiResponse.jsonError(error)
         response =

beacon_chain/sync/light_client_manager.nim

@@ -127,7 +127,7 @@ proc doRequest(
     peer: Peer,
     key: tuple[startPeriod: SyncCommitteePeriod, count: uint64]
 ): Future[LightClientUpdatesByRangeResponse] {.
-    async, raises: [IOError].} =
+    async.} =
   let (startPeriod, count) = key
   doAssert count > 0 and count <= MAX_REQUEST_LIGHT_CLIENT_UPDATES
   let response = await peer.lightClientUpdatesByRange(startPeriod, count)
@@ -142,16 +142,14 @@ proc doRequest(
 proc doRequest(
     e: typedesc[FinalityUpdate],
     peer: Peer
-): Future[NetRes[ForkedLightClientFinalityUpdate]] {.
-    raises: [IOError].} =
+): Future[NetRes[ForkedLightClientFinalityUpdate]] =
   peer.lightClientFinalityUpdate()
 
 # https://github.com/ethereum/consensus-specs/blob/v1.4.0-beta.5/specs/altair/light-client/p2p-interface.md#getlightclientoptimisticupdate
 proc doRequest(
     e: typedesc[OptimisticUpdate],
     peer: Peer
-): Future[NetRes[ForkedLightClientOptimisticUpdate]] {.
-    raises: [IOError].} =
+): Future[NetRes[ForkedLightClientOptimisticUpdate]] =
   peer.lightClientOptimisticUpdate()
 
 template valueVerifier[E](