Exporting a date range from an ENCRYPTED room over-paginated and mislabeled
"truncated": oldestRawTs (the how-far-back-have-we-paged boundary) was updated
only after the RoomMessage + decryption-failure filters, so undecryptable or
non-message old events never advanced it, the fromTs break never fired, and the
loop ran to MAX_EXPORT_PAGES. getTs() is unencrypted envelope metadata, so the
boundary update now runs for every event, above the filters.
Guarded with `ts > 0` so a bogus 0/negative origin_server_ts can't collapse the
boundary and cause the opposite failure — a silent early break / under-paginated
export (per review, silent omission in an export is worse than the loud
over-pagination this fixes). oldestTs (oldest collected in-range message) is
unchanged.
Two review agents (both confirmed getTs is decryption-independent, no
intra-page collection regression, oldestRawTs feeds only the fromTs break, no
plaintext regression); the second surfaced the 0-ts under-pagination edge, hence
the guard. Not unit-testable (embedded component + needs an E2EE room with
undecryptable history). Gate-green (tsc, eslint, prettier, 925 tests, build).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
jaredandClaude Opus 4.8
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