Check to existing country module before parsing bban

lib/iban_ex/parser.ex

@@ -45,13 +45,23 @@ def parse(iban_string) do
   def parse_bban(bban_string, country_code, options \\ [incomplete: false])
 
   def parse_bban(bban_string, country_code, incomplete: true) do
-    Country.country_module(country_code).incomplete_rule()
+    case Country.is_country_code_supported?(country_code) do
-    |> parse_bban_by_regex(bban_string)
+      true ->
+        Country.country_module(country_code).incomplete_rule()
+        |> parse_bban_by_regex(bban_string)
+      false ->
+        %{}
+    end
   end
 
-  def parse_bban(bban_string, country_code, _options) do
+  def parse_bban(bban_string, country_code, incomplete: false) do
-    Country.country_module(country_code).rule()
+    case Country.is_country_code_supported?(country_code) do
-    |> parse_bban_by_regex(bban_string)
+      true ->
+        Country.country_module(country_code).rule()
+        |> parse_bban_by_regex(bban_string)
+      false ->
+        %{}
+    end
   end
 
   defp parse_bban_by_regex(_regex, nil), do: %{}

lib/iban_ex/validator/validator.ex

@@ -123,7 +123,7 @@ def iban_violates_country_rule?(iban) do
          rule <- country_module.rule() do
       !Regex.match?(rule, bban)
     else
-      {:error, _error} -> true
+      _ -> true
     end
   end