start ipc server

apps/ethereum_jsonrpc/config/config.exs

@@ -9,6 +9,11 @@ config :ethereum_jsonrpc, EthereumJSONRPC.RequestCoordinator,
   wait_per_timeout: :timer.seconds(20),
   max_jitter: :timer.seconds(2)
 
+config :ethereum_jsonrpc,
+  rpc_transport: if(System.get_env("ETHEREUM_JSONRPC_JSON_RPC_TRANSPORT", "http") == "http", do: :http, else: :ipc),
+  ipc_path: System.get_env("IPC_PATH")
+
+
 # Add this configuration to add global RPC request throttling.
 # throttle_rate_limit: 250,
 # throttle_rolling_window_opts: [

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/application.ex

@@ -5,7 +5,7 @@ defmodule EthereumJSONRPC.Application do
 
   use Application
 
-  alias EthereumJSONRPC.{RequestCoordinator, RollingWindow}
+  alias EthereumJSONRPC.{IPC, RequestCoordinator, RollingWindow}
 
   @impl Application
   def start(_type, _args) do
@@ -17,6 +17,7 @@ defmodule EthereumJSONRPC.Application do
       :hackney_pool.child_spec(:ethereum_jsonrpc, recv_timeout: 60_000, timeout: 60_000, max_connections: 1000),
       Supervisor.child_spec({RollingWindow, [rolling_window_opts]}, id: RollingWindow.ErrorThrottle)
     ]
+    |> add_ipc_client()
     |> add_throttle_rolling_window(config)
     |> Supervisor.start_link(strategy: :one_for_one, name: EthereumJSONRPC.Supervisor)
   end
@@ -37,4 +38,11 @@ defmodule EthereumJSONRPC.Application do
       children
     end
   end
+
+  defp add_ipc_client(children) do
+    case Application.get_env(:ethereum_jsonrpc, :rpc_transport) do
+      :ipc -> [IPC.child_spec([path: Application.get_env(:ethereum_jsonrpc, :ipc_path)]) | children]
+      _ -> children
+    end
+  end
 end

apps/ethereum_jsonrpc/lib/ethereum_jsonrpc/ipc.ex

@@ -4,8 +4,19 @@ defmodule EthereumJSONRPC.IPC do
 
   # Server
 
-  def start_link(state \\ []) do
+  def child_spec(opts) do
-    GenServer.start_link(__MODULE__, Keyword.merge(state, socket: nil))
+    IO.inspect(opts)
+    default = %{
+      id: __MODULE__,
+      start: {__MODULE__, :start_link, opts},
+      type: :worker
+    }
+
+    Supervisor.child_spec(default, [])
+  end
+
+  def start_link({:path, path}) do
+    GenServer.start_link(__MODULE__, [path: path, socket: nil])
   end
 
   def init(state) do