Вынес работу с сетью и общие методы в отдельные файлы

lib/consts.dart

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+import 'package:flutter/material.dart';
+
+// Serious constants
+const String intUrl = 'https://pos-api-int.dinect.com/20130701/';
+const String intToken = '9fec83cdca38c357e6b65dbb17514cdd36bf2a08';
+
+// Hints
+const String merchantIDHint = 'ID магазина';
+const String posIDHint = 'Номер кассы';
+
+// Assets
+const String logo_png = 'assets/registration_logo.png';
+const String splash_png = 'assets/splash.png';
+const String logout_png = 'assets/logout.png';
+const String activate_token_bg_png = 'assets/activate_token_message_background.png';
+const String active_token_bg_png = 'assets/active_token_message_background.png';
+const String expansion_icon_png = 'assets/expansion_icon.png';
+const String powered_by_dinect_splash_png = 'assets/powered_by_dinect_splash.png';
+const String powered_by_dinect_png = 'assets/powered_by_dinect.png';
+
+// Colors
+const Color primaryColor = const Color(0xffeb0004);
+const Color greyTextColor = const Color(0xffa5a5a5);
+const Color textBorderColor = const Color(0xffcfd8dc);
+const Color tokenActiveTextColor = const Color(0xff1f5a1f);
+const Color tokenActivateTextColor = const Color(0xff4e3a19);
+const Color greenBackground = const Color(0xff8ae28a);
+const Color faqGrey = const Color(0xff5b5b5b);
+const Color faqTitlesColor = const Color(0xff404040);
+
+// Dimens
+const double verticalMargin = 28.0;
+const double buttonVerticalMargin = 42.0;
+const double buttonHeight = 48.0;
+const double iconHeight = 20.0;