The cexswap leg drops pairs with no 7-day volume and says why: a stale
last print on a dead pair must never drag the average. The nonlogs leg
did not, and averaged WOW-USDT — a 0.00723 print with null volume — against
a WOW-BTC route with real trades behind it.
Today that pulls the nonlogs leg 15% low, and since the leg is half the
WOW blend, the published price 8.4% low: 0.009830 against 0.010653. The
drag grows as WOW moves away from whenever that print happened.
Both routes are now volume-weighted by 24h quote volume, and a venue with
no volume anywhere is omitted so the other venue's sample stands alone —
the same shape as the cexswap function.
This feed is what Hash Bags, Smirk, wowlet and the desk's own fair value
display, so the number moves for all of them on deploy.
fetchEcbFiat() converts the ECB EUR-based table to USD multipliers each
cron run; /v2/rates multiplies COIN_USD for any known fiat quote. Feed
failure degrades to USD-only, never to a stale-wrong number. Deployed
and verified: WOW/EUR, GBP, JPY, MXN all serving.
The naive mean across all WOW pairs let stale prints on zero-volume
markets (WOW-ETH last traded at $0.000087) drag the cexswap component
~40% below its live markets, and the published WOW rate ~20% under fair.
Weight by volume7d_usd and drop pairs with no 7-day volume; if every
pair is dead the ticker falls back to the Nonlogs sample alone.
- POST /v1/trocador-webhook: Trocador hits this on every trade status change;
stored in KV under trade:<id> for 14 days (matching Trocador's retention).
- GET /v1/trade/🆔 returns the cached trade body so the wallet can poll us
instead of Trocador, dramatically reducing load on their infra per their
commercial team's request.
- GET /v1/sparkline?coin=BTC&hours=24: returns hourly history points for
rendering balance sparklines. Cron appends one entry per UTC hour per coin,
capped at 168 points (1 week).
Per source repos in ~/src:
- ~/src/smirk-backend/src/infra/prices.rs uses Nonlogs api/markets,
averaging (WOW-BTC * Kraken BTC/USD) and WOW-USDT routes.
- ~/src/neroswap-site/scrapers/scrape_cexswap.py hits
cexswap.cc/api/public/markets/summary which already returns last_usd
per pair.
WOW now sourced from BOTH and averaged — survives one source going down
without code changes.
Single endpoint serving USD spot prices for Hash Wallet, sourcing from
Kraken (majors) and NonKYC (Wownero), KV-cached and refreshed via cron
every minute. Drop-in /v2/rates shape compatible with the existing wallet
client; preferred /v1/prices returns everything in one call.
jwinterm