Files
observer/web/eslint.config.js
rob thijssen 110fbc3631 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
2026-09-04 12:33:54 +03:00

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JavaScript

import js from '@eslint/js'
import globals from 'globals'
import reactHooks from 'eslint-plugin-react-hooks'
import reactRefresh from 'eslint-plugin-react-refresh'
import tseslint from 'typescript-eslint'
export default tseslint.config(
// Generated by ts-rs from the Rust entities crate; edit the Rust, not these.
{ ignores: ['dist', 'src/api/generated'] },
{
extends: [js.configs.recommended, ...tseslint.configs.recommended],
files: ['**/*.{ts,tsx}'],
languageOptions: { ecmaVersion: 2022, globals: globals.browser },
plugins: { 'react-hooks': reactHooks, 'react-refresh': reactRefresh },
rules: {
...reactHooks.configs.recommended.rules,
'react-refresh/only-export-components': ['warn', { allowConstantExport: true }],
},
},
)