Add system_status/1

lib/krakex.ex

@@ -7,6 +7,7 @@ defmodule Krakex do
   ## Public market data
 
     * `server_time/1` - Get server time.
+    * `system_status/1` - Get system status.
     * `assets/2` - Get asset info.
     * `asset_pairs/2` - Get tradable asset pairs.
     * `ticker/2` - Get ticker information.
@@ -74,6 +75,29 @@ defmodule Krakex do
     @api.public_request(client, "Time")
   end
 
+  @doc """
+  Get system status.
+
+  Returns a map with the fields:
+
+    * `"status"` - one of:
+      * `"online"` - operational, full trading available.
+      * `"cancel_only"` - existing orders are cancelable, but new orders cannot be created.
+      * `"post_only"` - existing orders are cancelable, and only new post limit orders can be submitted.
+      * `"limit_only"` - existing orders are cancelable, and only new limit orders can be submitted.
+      * `"maintenance"` - system is offline for maintenance.
+    * `"timestamp"` - ISO-8601 datetime.
+
+  ## Example response:
+
+       {:ok, %{"status" => "online", "timestamp" => "2021-03-05T16:04:53Z"}}
+
+  """
+  @spec system_status(Client.t()) :: Krakex.API.response()
+  def system_status(client \\ @api.public_client()) do
+    @api.public_request(client, "SystemStatus")
+  end
+
   @doc """
   Get asset info.
 

test/krakex_test.exs

@@ -12,6 +12,14 @@ defmodule KrakexTest do
       assert client() |> Krakex.server_time() == {:ok, :server_time_1}
     end
 
+    test "system_status/0" do
+      assert Krakex.system_status() == {:ok, :system_status_0}
+    end
+
+    test "system_status/1" do
+      assert client() |> Krakex.system_status() == {:ok, :system_status_1}
+    end
+
     test "assets/0" do
       assert Krakex.assets() == {:ok, :assets_0}
     end

test/support/test_api.ex

@@ -15,6 +15,8 @@ defmodule Krakex.TestAPI do
 
   def public_request(@public_client, "Time", []), do: {:ok, :server_time_0}
   def public_request(@custom_client, "Time", []), do: {:ok, :server_time_1}
+  def public_request(@public_client, "SystemStatus", []), do: {:ok, :system_status_0}
+  def public_request(@custom_client, "SystemStatus", []), do: {:ok, :system_status_1}
   def public_request(@public_client, "Assets", []), do: {:ok, :assets_0}
   def public_request(@custom_client, "Assets", []), do: {:ok, :assets_1_client}
   def public_request(@public_client, "Assets", asset: ["BTC"]), do: {:ok, :assets_1_opts}