Add configurable welcome bonus days for referred signups

- add REFERRAL_WELCOME_BONUS_DAYS setting (default 3) in settings.py
- document REFERRAL_WELCOME_BONUS_DAYS in .env.example
- apply welcome bonus on first /start only for newly created users with referred_by_id
- replace hardcoded 3 days with settings.REFERRAL_WELCOME_BONUS_DAYS
- skip bonus flow when value is 0 or less
- send user notification after successful bonus application
- add i18n key referral_welcome_bonus_applied to ru.json and en.json

.env.example

@@ -124,6 +124,7 @@ SUBSCRIPTION_NOTIFY_DAYS_BEFORE=3                                             #
 
 
 REFERRAL_ONE_BONUS_PER_REFEREE=False                                          # Give a bonus only once per referee
+REFERRAL_WELCOME_BONUS_DAYS=3                                                 # Welcome bonus for newly registered user from referral link
 LEGACY_REFS=true                                                              # Allow ref_<tg_id> links. Leave unset/true unless you want to disable old links
 # Referral Bonus Days
 # Bonus for the inviting user

bot/handlers/user/start.py

@@ -449,6 +449,50 @@ async def start_command_handler(message: types.Message,
                     f"New user {user_id} added to session. Referred by: {referred_by_user_id or 'N/A'}."
                 )
 
+                # Auto-grant referral welcome bonus to newly registered referred users.
+                referral_welcome_days = max(
+                    0, int(getattr(settings, "REFERRAL_WELCOME_BONUS_DAYS", 0) or 0)
+                )
+                if referred_by_user_id and referral_welcome_days > 0:
+                    try:
+                        referral_bonus_end_date = await subscription_service.extend_active_subscription_days(
+                            session,
+                            user_id,
+                            referral_welcome_days,
+                            reason="referral_welcome_bonus",
+                        )
+                        if referral_bonus_end_date:
+                            await session.commit()
+                            logging.info(
+                                "Referral welcome bonus applied: user %s got %s days, new end date %s.",
+                                user_id,
+                                referral_welcome_days,
+                                referral_bonus_end_date.isoformat(),
+                            )
+                            await message.answer(
+                                _(
+                                    "referral_welcome_bonus_applied",
+                                    days=referral_welcome_days,
+                                    end_date=referral_bonus_end_date.strftime("%d.%m.%Y %H:%M:%S"),
+                                ),
+                                parse_mode="HTML",
+                            )
+                        else:
+                            await session.rollback()
+                            logging.warning(
+                                "Referral welcome bonus was not applied for user %s (referred by %s).",
+                                user_id,
+                                referred_by_user_id,
+                            )
+                    except Exception as referral_bonus_error:
+                        await session.rollback()
+                        logging.error(
+                            "Failed to apply referral welcome bonus for user %s: %s",
+                            user_id,
+                            referral_bonus_error,
+                            exc_info=True,
+                        )
+
                 # Send notification about new user registration
                 try:
                     from bot.services.notification_service import NotificationService

config/settings.py

@@ -170,6 +170,10 @@ class Settings(BaseSettings):
         default=True,
         description="When true, referral bonuses (for inviter and referee) are applied only once per invited user - on their first successful payment."
     )
+    REFERRAL_WELCOME_BONUS_DAYS: int = Field(
+        default=3,
+        description="Welcome bonus days granted to a newly registered user who joined via referral link.",
+    )
     LEGACY_REFS: bool = Field(
         default=True,
         description="Allow legacy referral links like ref_<telegram_id> to continue working. Defaults to True when unset."

locales/en.json

@@ -92,6 +92,7 @@
   "trial_confirm_activate_button": "✅ Activate!",
   "trial_activated_alert": "Trial activated!",
   "trial_activated_details_message": "✅ Trial activated!\nYour {days}-day trial is active until {end_date}.\n\nConnection key:\n<code>{config_link}</code>\n\nTo connect, open the link and follow the instructions 👇",
+  "referral_welcome_bonus_applied": "🎁 You have received {days} bonus day(s) for registering via a referral link!\nYour subscription is active until {end_date}.",
   "yes_button": "Yes",
   "no_button": "No",
   "referral_program_info_new": "🎁 <b>Referral Program</b>\n\n📊 <b>Your stats:</b>\n👥 Friends invited: <b>{invited_count}</b>\n💳 Purchased subscription: <b>{purchased_count}</b>\n\n🔗 Your link:\n<code>{referral_link}</code>\n\n💰 <b>Invitation bonuses:</b>\n{bonus_details}\n\n📢 Share the link with friends and get bonuses!",

locales/ru.json

@@ -92,6 +92,7 @@
   "trial_confirm_activate_button": "✅ Активировать!",
   "trial_activated_alert": "Пробный период активирован!",
   "trial_activated_details_message": "✅ Пробный доступ активирован!\nВаш триал на {days} дн. действует до {end_date}.\n\nКлюч подключения:\n<code>{config_link}</code>\n\nЧтобы подключиться, перейдите по ссылке и следуйте инструкции 👇",
+  "referral_welcome_bonus_applied": "🎁 Вам начислено {days} бонусных дн. за регистрацию по реферальной ссылке!\nПодписка активна до {end_date}.",
   "yes_button": "Да",
   "no_button": "Нет",
   "referral_program_info_new": "🎁 <b>Реферальная программа</b>\n\n📊 <b>Твоя статистика:</b>\n👥 Приглашено друзей: <b>{invited_count}</b>\n💳 Купили подписку: <b>{purchased_count}</b>\n\n🔗 Твоя ссылка:\n<code>{referral_link}</code>\n\n💰 <b>Бонусы за приглашения:</b>\n{bonus_details}\n\n📢 Поделись ссылкой с друзьями и получай бонусы!",