Padreug
b5c87c60b4
NIP-52 calendar events (31922/31923) are replaceable and republished whenever inventory changes (a ticket sells). build_nip52_event stamped created_at=int(time.time()); relays only push a replacement to OPEN subscriptions when created_at is strictly newer, so two republishes in the same wall-clock second tie and the second is silently dropped for live subscribers — clients' "tickets remaining" badge stalls until a reload. Same root cause as the webapp fix (aiolabs/webapp#122). - Add monotonic_created_at() in nostr_timestamp.py = max(now, last+1), mirroring the webapp helper + docs/nostr-patterns/replaceable-events.md. - Anchor it on the already-persisted Event.nostr_event_created_at (set after each publish in nostr_hooks.py). The kind-5 delete event is not replaceable, so it keeps plain int(time.time()). - Unit tests mirror the webapp's timestamp suite. Concurrent same-second sales reading the same stored anchor can still collide; full hardening (row-level lock) is noted as follow-up in #26. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
34 lines
1.5 KiB
Python
34 lines
1.5 KiB
Python
"""Monotonic ``created_at`` for replaceable / addressable Nostr events.
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Relays only push a replaceable update to OPEN subscriptions when its
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``created_at`` is strictly newer than the version they already hold.
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``created_at`` is integer seconds, so a publisher that stamps
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``int(time.time())`` can emit two versions within the same wall-clock
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second (e.g. two ticket sales republishing the NIP-52 calendar event) —
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the relay treats the second as not-newer and never propagates it to live
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subscribers (it only surfaces on a reload / fresh REQ).
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Returning ``max(now, last_created_at + 1)`` guarantees a strictly
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increasing timestamp across successive publishes of the same replaceable
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event. When enough real seconds have elapsed it tracks wall-clock; only
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same-second (or clock-skewed) republishes get nudged forward.
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Mirrors the webapp's ``monotonicCreatedAt`` (src/lib/nostr/timestamp.ts)
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and ``docs/nostr-patterns/replaceable-events.md``.
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"""
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import time
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def monotonic_created_at(last_created_at: int | None, now: int | None = None) -> int:
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"""Strictly-newer ``created_at`` for the next publish of a coord.
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:param last_created_at: ``created_at`` of the previously published
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version (seconds), or ``None`` if none has been published yet.
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:param now: Current time in seconds — injectable for tests; defaults
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to ``int(time.time())``.
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"""
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base = int(time.time()) if now is None else now
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if last_created_at is None:
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return base
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return max(base, last_created_at + 1)
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