aaf37baaca382f154cd082e68cd2df340f6fc6a2
3 Commits
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ef367d5993
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fix: stop timing the catch-up, and name windows for what they are
Planck's page reported a **0.175 s** block time against a true 29.8 — a factor of 170 — flagged *measured* rather than nominal, so the headline block time, the network hashrate (877 GH/s on a testnet nobody mines) and the window label were all wrong and none of them looked it. `measured_interval` divides elapsed time by height difference, which is the chain's rate only if every height between two samples was watched arriving. A gap fill is proof they were not. `record()` marked every head-stream block `at_tip: true`, including the head that landed right after `fill_gap` closed a 1,251-block gap — so the pair straddling it measured how fast this observer caught up. `ingest` now forgets its tip samples whenever it fills a gap and records the closing head with `at_tip: false`. The interval goes nominal until twenty fresh samples exist, which is `MIN_TIP_SAMPLES` doing its job: nominal and labelled nominal beats measured and wrong. The reported symptom was smaller and had the same root. `baba-gorchitsa` showed three blocks in Planck's "six hours" having left for mainnet a day earlier — and it was right to: 3,600 Planck blocks currently span **29 hours**, because the chain's rate fell ninefold when its miners left. The label was built by multiplying the block count by the current interval, which describes the rate now rather than the period covered. It comes from `span_seconds` instead — the authored-time span of exactly the blocks tallied, already the denominator of every per-miner hashrate — and carries no "~", because nothing is estimated. So the names went too. A window is a block count, and calling one `six_hours` is a promise the site cannot keep on a chain whose rate moves; `/planck/six_hours` was the reason a reader believed a day-old row was current. The selector reads 600 / 3.6k / 14.4k / 100.8k and the URL carries the count. Less friendly than `6h`, and true on every chain. The old names still parse and are never emitted, so shared links keep working — the router rewrites them. Closes #14 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Jp6a8EDar9ueEhAxzep4V5 |
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7e5c2de936
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feat: sparkline history under the headline tiles
Adds `GET /v1/chains/{chain}/series` and a sparkline under network hashrate,
difficulty, block time and miners. Height gets none — it only goes up, and a
straight diagonal reports nothing.
The chart is bucketed by height, not by time: every point is the same number of
blocks, so every point carries equal statistical weight and a stretch nobody
recorded stays the same width on the axis as one that was. A bucket is the
window over fifty, which makes a full window exactly fifty buckets — that is
what lets the rolling miner count at the last point be the same number printed
in the tile above it, rather than a per-bucket count that would sit well below
it. Buckets are anchored to absolute height for the same reason `miner_series`
bins from the epoch: anchored to the tip instead, every boundary slides by one
on every block and the chart shifts under a reader watching it.
Interval comes from `authored_at`, never `observed_at`. A gap fill writes a
whole batch of observation times within the same second, so deltas taken from
it read as a chain producing hundreds of blocks a second — the trap
`RollingWindow`'s `at_tip` flag exists to avoid, which until now lived only in
memory. It is a column as of `0002`, so the distinction survives a restart and
`observed_at` is interpretable at all.
Each point's interval is a three-bucket moving average. The mean of one
bucket's gaps still carries real Poisson error — 72 blocks of a 15 s interval
lands at ±1.8 s — and across fifty points that draws a chain that appears to
change size every few minutes and does not.
Fixes a wrong number found on the way in: `pallet_qpow` retargets in
`on_finalize`, so `QPoWApi_get_difficulty` at the latest state is the
difficulty for the *next* block, not the one just seen. Every stored difficulty
was off by one block — invisible, because a gradual retarget still looks
plausible. It is now asked at `header.parent_hash`, the same call the miner
made when it built the block. A node that has pruned that state gets `None`
rather than the current value: substituting it is exactly how a gap fill would
stamp today's difficulty across a stretch of old heights. The CLI backfill had
the same bug at greater scale, copying one reading across an entire range.
Unknowns are drawn as breaks in the line, never interpolated: an outage, a
difficulty a pruned node cannot supply, a point without a full window of
authors behind it. A chart that guesses across what was never recorded is the
same class of lie as a hashrate divided by a sync speed, and just as hard to
catch afterwards.
Read against the dataviz skill first, per CLAUDE.md. Single series, one hue;
emphasis on the newest point is `--data-bright`, a lighter step of the same
bronze, because the usual "current period in the accent" convention is the one
change that would break this palette. The hover readout borrows each tile's
note line — five floating tooltips across a row of 180px tiles is a pile, not a
hover layer — and the same readout is on keyboard focus and in the aria-label,
since the line does not start at zero and its height is not a quantity anyone
should be estimating.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Jp6a8EDar9ueEhAxzep4V5
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110fbc3631
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feat: blackbeard.observer — live Quantus mining leaderboard
Cargo workspace plus a Vite frontend, following ~/git/architecture/generic.md. Every block header carries its author's wormhole reward preimage in a `pow_` PreRuntime digest, so authorship for the whole network is derivable from headers alone — no indexer, no registration, no way for a miner to be left out. That decoding, the hashrate maths and the telemetry name attribution live in blackbeard-core with no I/O at all, so the parts that are easy to get subtly wrong are exercised by unit tests rather than only against a live chain. The browser holds one WebSocket: snapshot on subscribe, deltas thereafter. The head stream is itself a push (chain_subscribeNewHeads), so a block reaches the page the moment the node imports it. Messages are serialised once per broadcast, and leaderboards are recomputed only for windows a socket is actually watching. No RxJS — useSyncExternalStore is React's own contract for this. Verified against the live Planck testnet: 12/12 headers decoded, telemetry names attributed (quanpool-planck, baba-gorchitsa, …), warm start restoring 84 blocks and 5 held names across a restart. Three findings worth recording, all in CLAUDE.md: - substrate-telemetry sends its JSON in *binary* frames. A text-only client connects, subscribes, reports healthy and receives nothing at all — and a Python probe hides it, because json.loads accepts bytes. - Difficulty is a little-endian U512; decoding it big-endian gives a number wrong by ~10^150 that still renders fine. - Planck's real block interval is ~13-15s against a 6s target with enormous variance, so a measured interval needs 20 tip samples before it is publishable. Deploy assets, the Gitea Actions workflow and script/infra-setup.sh are included; port 25864 is registered in architecture/port-allocations.md. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01MSDYiibCtELsrjQq6KXnoi |
