Make receive_response on IpcServer private

lib/ethereumex/ipc_server.ex

@@ -3,6 +3,14 @@ defmodule Ethereumex.IpcServer do
 
   use GenServer
 
+  def start_link(state \\ []) do
+    GenServer.start_link(__MODULE__, Keyword.merge(state, socket: nil))
+  end
+
+  def post(pid, request) do
+    GenServer.call(pid, {:request, request})
+  end
+
   def init(state) do
     opts = [:binary, active: false, reuseaddr: true]
 
@@ -14,21 +22,26 @@ defmodule Ethereumex.IpcServer do
     end
   end
 
-  def start_link(state \\ []) do
-    GenServer.start_link(__MODULE__, Keyword.merge(state, socket: nil))
-  end
+  def handle_call(
+        {:request, request},
+        _from,
+        [socket: socket, path: _, ipc_request_timeout: timeout] = state
+      ) do
+    response =
+      socket
+      |> :gen_tcp.send(request)
+      |> receive_response(socket, timeout)
 
-  def post(pid, request) do
-    GenServer.call(pid, {:request, request})
+    {:reply, response, state}
   end
 
-  def receive_response(data, socket, timeout, result \\ <<>>)
+  defp receive_response(data, socket, timeout), do: receive_response(data, socket, timeout, <<>>)
 
-  def receive_response({:error, reason}, _socket, _timeout, _result) do
+  defp receive_response({:error, reason}, _socket, _timeout, _result) do
     {:error, reason}
   end
 
-  def receive_response(:ok, socket, timeout, result) do
+  defp receive_response(:ok, socket, timeout, result) do
     with {:ok, response} <- :gen_tcp.recv(socket, 0, timeout) do
       new_result = result <> response
 
@@ -39,21 +52,4 @@ defmodule Ethereumex.IpcServer do
       end
     end
   end
-
-  def receive_response(data, _socket, _timeout, _result) do
-    {:error, data}
-  end
-
-  def handle_call(
-        {:request, request},
-        _from,
-        [socket: socket, path: _, ipc_request_timeout: timeout] = state
-      ) do
-    response =
-      socket
-      |> :gen_tcp.send(request)
-      |> receive_response(socket, timeout)
-
-    {:reply, response, state}
-  end
 end