Report exception to exchange in swap mode

lib_standard_app/main.c

@@ -149,7 +149,7 @@ WEAK void library_app_main(libargs_t *args)
         }
         FINALLY
         {
-            os_lib_end();
+            swap_finalize_exchange_sign_transaction(LAST_CYCLE_EXCEPTION);
         }
     }
     END_TRY;

lib_standard_app/swap_entrypoints.h

@@ -41,7 +41,15 @@ void swap_handle_get_printable_amount(get_printable_amount_parameters_t *params)
  * return false on error, true otherwise */
 bool swap_copy_transaction_parameters(create_transaction_parameters_t *sign_transaction_params);
 
+
+// Boolean like status + a special value
+typedef enum last_cycle_status_e {
+    LAST_CYCLE_ERROR = 0,
+    LAST_CYCLE_SUCCESS = 1,
+    LAST_CYCLE_EXCEPTION = 2,
+} last_cycle_status_t;
+
 /* Set create_transaction.result and call os_lib_end().
  *
  * Doesn't return */
-void __attribute__((noreturn)) swap_finalize_exchange_sign_transaction(bool is_success);
+void __attribute__((noreturn)) swap_finalize_exchange_sign_transaction(last_cycle_status_t is_success);