Rates Engine v0.5.0-rc.37

[v0.5.0-rc.37] — 2026-05-08

Added

• Persistent fx_quotes hypertable (PR #1041). Daily forex
  rate snapshots now backfill into a TimescaleDB hypertable
  (migration 0028) so the per-currency page can render charts
  beyond the 7-day in-memory window. The forex worker upserts on
  every refresh tick; a one-shot scripts/ops/fx-history-backfill
  walks Massive's grouped-daily endpoint to seed up to 10 years
  of history.
• /v1/currencies/{ticker}?range= (PR #1041) — handler now
  accepts 30d, 90d, 1y, 5y, 10y, all. Reads from the
  new fx_quotes hypertable and surfaces the series as history +
  history_range. Default behaviour (no range param) is
  unchanged: the in-memory 7d series in history_7d.
• /currencies/[ticker]: range-selectable USD-value chart
  (PR #1041) replaces the 7d-only sparkline. Chart uses a
  720×200 SVG optimised for hundreds of points.
• Asset detail: market-cap timeline empty-state (PR #1041)
  on the Supply tab — placeholder until the supply-history
  hypertable joins up with per-asset USD prices.
• /exchanges all-CEX markets table (PR #1042) sorted by 24h
  USD volume across every venue, merged client-side.
• /exchanges/{venue} candle chart (PR #1042) — TradingView-
  style lightweight-charts panel with selectable pair, timeframe
  (24h/7d/30d/1y/all) and granularity (1m/15m/1h/4h/1d).
• /exchanges/{venue} subscription disclaimer (PR #1042) —
  explicit callout that the curated pair set is by-design, not
  a data bug.
• /lending pool list + detail: deploy timestamp + initiator
  (PR #1042) for every Blend pool we know about, sourced from the
  Phase-4 wasm-history audit.

Performance

• Background prewarm goroutine (PR #1042) for the heaviest
  API caches. /v1/sources?include=stats and /v1/markets / /v1/pools
  each scan ~24h of the trades hypertable on cold paths (5–10s);
  the rc.35/rc.36 caches drop them to <1ms but TTL expiry meant
  the first user request after a cache miss still paid the full
  query cost. A 25s-cadence goroutine in cmd/ratesengine-api now
  re-runs the queries just inside the 30/60s TTLs so user
  requests always land on a warm cache.

Changed

• /assets/[slug] converter: searchable CurrencyCombobox
  (PR #1043). Replaced the plain <select> with the same
  keyboard-friendly combobox that backs /currencies/[ticker]'s
  converter — typing narrows ~110 entries down inline. Component
  lifted to @/components/CurrencyCombobox.
• /currencies header copy (PR #1042) updated to credit
  Massive (Polygon.io); points users at the new range-selectable
  chart on /currencies/[ticker].

Fixed

• Wider lookback windows for /v1/coins change_1h/24h/7d (PR
  #1042). Old windows (10 min / 1 h / 4 h around target) often
  missed low-volume pairs; widened to 35 min / 2 h 30 min / 14 h.
  The DISTINCT ON ... ORDER BY bucket DESC selector still picks
  the latest available row inside the window so the anchor stays
  close to the target.
• /dexes detail link (PR #1042) now points at /dexes/{source}
  instead of /sources/{source}; the latter route exists but
  rendered the operator-metadata view, not the per-DEX detail.
• AssetLabel: case-insensitive C-strkey match (PR #1042) plus
  a length-16 truncation fallback for any unstructured asset
  string. Stops the long contract IDs that bled through on
  /dexes pool rows when the SAC wrapper map didn't resolve them.
• View Code button (PR #1042) drops the literal </> text
  next to the Code2 SVG — was rendering both side-by-side
  site-wide.
• /assets empty-state cells (PR #1042) now have explanatory
  tooltips on the Dash so users see why a row is missing 7d %,
  market cap, or supply rather than just —.