fix: Use inet6 when host requires it (#778)

Fixes bug where inet (IP V4) was being used instead of inet6 (IP V6) due to badly set connection configuration.

lib/realtime/helpers.ex

@@ -139,7 +139,7 @@ defmodule Realtime.Helpers do
       name = settings["db_name"]
       user = settings["db_user"]
       password = settings["db_password"]
-      socket_opts = settings["db_socket_opts"]
+      socket_opts = [detect_ip_version(host)]
 
       opts = %{
         host: host,
@@ -379,6 +379,26 @@ defmodule Realtime.Helpers do
     end)
   end
 
+  @doc """
+  Detects the IP version for a given host.
+
+  ## Examples
+
+      iex> Realtime.Helpers.detect_ip_version("example.com")
+      :inet
+      iex> Realtime.Helpers.detect_ip_version("ipv6.example.com")
+      :inet6
+  """
+  @spec detect_ip_version(String.t()) :: :inet | :inet6
+  def detect_ip_version(host) when is_binary(host) do
+    host = String.to_charlist(host)
+
+    case :inet.gethostbyname(host) do
+      {:ok, _} -> :inet
+      _ -> :inet6
+    end
+  end
+
   defp stop_user_tenant_process(tenant, platform_region, acc) do
     Extensions.PostgresCdcRls.handle_stop(tenant, 5_000)
     # credo:disable-for-next-line

mix.exs

@@ -4,7 +4,7 @@ defmodule Realtime.MixProject do
   def project do
     [
       app: :realtime,
-      version: "2.25.56",
+      version: "2.25.57",
       elixir: "~> 1.14.0",
       elixirc_paths: elixirc_paths(Mix.env()),
       start_permanent: Mix.env() == :prod,