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Retry ETTN creation on Nova Poshta rate limit instead of failing

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Checkbox relays Nova Poshta's "To many requests" (20000401501) as a 4xx
third_party.generic error, not a 429, so bursts of receipt requests ended
up as failed receipts. Such responses are now CheckboxRateLimitedError:
the receipt stays pending and the worker job is retried with arq.Retry
after the "Try again after N seconds" delay plus backoff. NP timeouts
relayed the same way are treated as unavailable (unknown outcome).

The HTTP client also sends Checkbox requests one at a time with a
CHECKBOX_MIN_REQUEST_INTERVAL_MS pause and signs the cashier in once for
concurrent jobs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
lauadmin
2026-09-24 21:25:59 +03:00
co-authored by Claude Opus 5.5
parent f88b5cccc0
commit 528a869657
9 changed files with 220 additions and 23 deletions
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.env.example
+2
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@@ -67,6 +67,8 @@ NOVA_POSHTA_API_KEY=change-me-novaposhta-apikey
CHECKBOX_BASE_URL=https://api.checkbox.ua
CHECKBOX_CLIENT_NAME=lux_fiscal
CHECKBOX_CLIENT_VERSION=0.1.0
# Пауза между запросами к Checkbox (мс): Новая Почта за Checkbox ограничивает частоту.
CHECKBOX_MIN_REQUEST_INTERVAL_MS=1000
# ЕТТН-чеки на тестовой кассе Checkbox не работают: локально весь цикл
# прогоняется через стаб (чек «фискализируется» на втором опросе). В production запрещено.
CHECKBOX_USE_STUB=false