feat(payments): add LAVA Business payment provider

Add a new provider module for LAVA Business (api.lava.ru):

- invoice creation via POST /business/invoice/create signed with
  HMAC-SHA256 over the raw request body in the Signature header
- webhook handling with Authorization-header signature verification
  that accepts both raw-body and sorted-keys JSON canonicalizations
  (legacy PHP SDK shops sign the latter), plus amount cross-check
  before finalizing a successful payment
- pending invoice reuse through /business/invoice/status
- Telegram pay_lava callback flow and Web App payment creation
- admin settings manifest fields, presentation overrides, and
  RUB-only currency support declared on the provider SPEC

Register the SPEC in the provider registry and wire the provider into
the payment method order, success-email labels, and locale override
prefixes.

This commit is contained in:

3252a8

2026-06-10 23:32:09 +03:00

parent 1d43606446

commit bb844869ee

6 changed files with 895 additions and 3 deletions

									
										backend/bot/services/subscription_service_impl/payments.py
									
		+1
		
												View File
												
				@@ -13,6 +13,7 @@ class PaymentContextMixin:

				        "platega": "Platega",

				        "severpay": "SeverPay",

				        "wata": "Wata",

				        "lava": "LAVA",

				        "cryptopay": "Crypto Pay",

				        "paykilla": "PayKilla",

				        "telegram_stars": "Telegram Stars",