test: test Nut02 routes (#32)

config/test.exs

@@ -7,7 +7,6 @@ config :cashubrew, Cashubrew.Web.Endpoint,
   secret_key_base: "your_secret_key_base_for_tests",
   server: false
 
-# Print only warnings and errors during test
 config :logger, level: :warning
 
 # Initialize plugs at runtime for faster test compilation

lib/cashubrew/NUTs/NUT-01/serde.ex

@@ -2,6 +2,7 @@ defmodule Cashubrew.Nuts.Nut01.Serde.GetKeysResponse do
   @moduledoc """
   The body of the get keys rest response
   """
+  @derive Jason.Encoder
   @enforce_keys [:keysets]
   defstruct [:keysets]
 
@@ -13,7 +14,7 @@ defmodule Cashubrew.Nuts.Nut01.Serde.GetKeysResponse do
     accumulator
   end
 
-  defp inner_from_keysets([%{id: id, unit: unit, keys: keys}, tail], accumulator) do
+  defp inner_from_keysets([%{id: id, unit: unit, keys: keys} | tail], accumulator) do
     inner_from_keysets(tail, [
       Cashubrew.Nuts.Nut01.Serde.Keyset.from_keyset(id, unit, keys) | accumulator
     ])
@@ -57,6 +58,7 @@ defmodule Cashubrew.Nuts.Nut01.Serde.Keyset do
   @moduledoc """
   A keyset
   """
+  @derive Jason.Encoder
   @enforce_keys [:id, :unit, :keys]
   defstruct [:id, :unit, :keys]
 

lib/cashubrew/NUTs/NUT-02/keysets.ex

@@ -72,6 +72,3 @@ defmodule Cashubrew.Nuts.Nut02.Keyset do
       (:crypto.hash(:sha256, pubkeys_concat) |> Base.encode16(case: :lower) |> binary_part(0, 14))
   end
 end
-
-# TODO: add logic for wallet to handle fees
-# https://cashubtc.github.io/nuts/02/#fees

test/nut01_test.exs

@@ -0,0 +1,35 @@
+defmodule Cashubrew.Nuts.Nut01Test do
+  use Cashubrew.Test.ConnCase
+  alias Cashubrew.Nuts.Nut01
+
+  test "active_keysets", %{conn: conn} do
+    conn = get(conn, ~p"/api/v1/keys")
+    data = json_response(conn, 200)
+
+    keysets = Map.fetch!(data, "keysets")
+    assert length(keysets) == 1
+    [keyset | _] = keysets
+
+    id = Map.fetch!(keyset, "id")
+    unit = Map.fetch!(keyset, "unit")
+    keys = Map.fetch!(keyset, "keys")
+
+    assert unit == "sat"
+    assert is_bitstring(id)
+    assert is_map(keys)
+    assert Map.has_key?(keys, "1")
+
+    Enum.each(keys, fn {k, v} ->
+      # The keys are 1, 2, 4, 8, ...
+      {amount, ""} = Integer.parse(k, 10)
+
+      if amount != 1 do
+        assert rem(amount, 2) == 0
+        assert Map.has_key?(keys, "#{div(amount, 2)}")
+      end
+
+      # The values are valid hex numbers
+      {_, ""} = Integer.parse(v, 16)
+    end)
+  end
+end