GenServer wrapper for Extism Plugin

plugin_server.ex

defmodule ExtismElixirHost.PluginServer do
  use GenServer

  @impl true
  def init() do
    {:ok, nil}
  end

  @impl true
  def handle_call({:new, manifest, wasi}, _from, plugin) do
    {:ok, plugin}  = Extism.Plugin.new(manifest, wasi)
    {:reply, plugin, plugin}
  end

  @impl true
  def handle_call(call_details, _from, plugin) do
    [func_name | args] = Tuple.to_list(call_details)
    response = apply(Extism.Plugin, func_name, [plugin | args])
    {:reply, response, plugin}
  end
end

use.ex

iex(1)> {:ok, pid} = GenServer.start_link(ExtismElixirHost.PluginServer, nil)
{:ok, #PID<0.244.0>}
iex(2)> GenServer.call(pid, {:new, %{wasm: [%{path: "/Users/ben/Code/extism/wasm/code.wasm"}]}, false})
%Extism.Plugin{
  resource: 0,
  reference: #Reference<0.3842371659.2740977668.17272>
}
iex(3)> GenServer.call(pid, {:call, "count_vowels", "this is a test"})
{:ok, "{\"count\": 4}"}