add websocket rpc server

nimbus/config.nim

@@ -788,7 +788,7 @@ LOCAL SERVICE OPTIONS:
   --graphql               Enable the HTTP-GraphQL server
   --graphqlbind:<value>   Set address:port pair GraphQL server will bind (default: localhost:8547)
   --ws                    Enable the Websocket JSON-RPC server
-  --wsbind:<value>        Set address:port pair(s) (comma-separated) Websocket JSON-RPC server will bind to (default: localhost:8546)
+  --wsbind:<value>        Set address:port pair Websocket JSON-RPC server will bind to (default: localhost:8546)
   --wsapi:<value>         Enable specific set of Websocket RPC API from list (comma-separated) (available: eth, debug)
 
 LOGGING AND DEBUGGING OPTIONS:

nimbus/nimbus.nim

@@ -40,6 +40,7 @@ type
     ethNode*: EthereumNode
     state*: NimbusState
     graphqlServer*: GraphqlHttpServerRef
+    wsRpcServer*: RpcWebSocketServer
 
 proc start(nimbus: NimbusNode) =
   var conf = getConfiguration()
@@ -138,6 +139,18 @@ proc start(nimbus: NimbusNode) =
   if RpcFlags.Debug in conf.rpc.flags:
     setupDebugRpc(chainDB, nimbus.rpcServer)
 
+  # Creating Websocket RPC Server
+  if RpcFlags.Enabled in conf.ws.flags:
+    doAssert(conf.ws.binds.len > 0)
+    nimbus.wsRpcServer = newRpcWebSocketServer(conf.ws.binds[0])
+    setupCommonRpc(nimbus.ethNode, nimbus.wsRpcServer)
+
+  # Enable Websocket RPC APIs based on RPC flags and protocol flags
+  if RpcFlags.Eth in conf.ws.flags and ProtocolFlags.Eth in conf.net.protocols:
+    setupEthRpc(nimbus.ethNode, chainDB, nimbus.wsRpcServer)
+  if RpcFlags.Debug in conf.ws.flags:
+    setupDebugRpc(chainDB, nimbus.wsRpcServer)
+
   ## Starting servers
   if RpcFlags.Enabled in conf.rpc.flags:
     nimbus.rpcServer.rpc("admin_quit") do() -> string: