The wormhole pulse was broadcast from inside `index_events`, which has two
callers: `record`, for a block that just arrived, and `backfill`, walking
history. So the backfill re-announced every block it re-read — and because it
walks towards the tip, the blocks it re-announced were exactly the ones a
viewer had just watched. The live console listed #43,446 three times.
This is the live/backfill confusion this repository has already been bitten by
twice, arriving by a third road, so the guard is a type rather than a comment:
`Pass::Live` or `Pass::Backfill`, and a caller cannot forget to say which.
The duplicates did more damage than repeating themselves. Console lines were
keyed `height-index`, which looked unique and was not, and React given
duplicate keys renders duplicates *and* stops honouring the list's own length
cap — twelve lines had become eighteen on screen. Lines are keyed on a
monotonic counter now, so a reorg re-recording a height cannot reproduce it.
Neither half was caught by the build, the lint, or the tests. Both were
obvious within a minute of watching the live page.
Refs #17
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
rob thijssen
578a54ef87
