feat(market): per-exchange price chart from each venue's own candle API

The market chart was hardwired to CoinGecko's cross-exchange USD aggregate
(vs_currency=usd), so selecting a trading pair only changed the "Trade" link —
never the chart or price. Now the SELECTED exchange drives both.

CoinGecko gives us which venues list DRGX (the ticker `market.identifier`) but
not their APIs, so add data/exchange_candles.h: a hand-maintained map from that
identifier to each venue's public candle endpoint, with two adapters verified
against the live APIs — Ourbit (MEXC-style /api/v3/klines, array format) and
NonKYC (TradingView-UDF /market/candles, `bars`). Unmapped venues return no URL,
so the chart falls back to the CoinGecko aggregate and nothing regresses.

- App::refreshExchangeChart() resolves the selected pair, fetches its intraday
  (5-min) + daily candles via the TLS-verified httpGetString on the worker, and
  stores them on MarketInfo (exchange_chart_intraday/daily + exchange_chart_active).
  Re-fetches on pair change; self-throttled to ~30 min otherwise; falls back to
  aggregate on any failure.
- chartSeries() draws the per-exchange series when active (portfolio sparklines
  stay on the aggregate). The hero shows the selected venue's real price
  (converted_last) — Ourbit vs NonKYC differ ~7%. parseCoinGeckoTickers now
  captures the identifier + per-exchange USD price (previously discarded).

Adapters unit-tested against real captured responses (URL builder + both parsers
+ the chartSeries switch) and validated against the full live feeds (Ourbit 20d,
NonKYC 370d, ascending, correct closes). Build + ctest + hygiene green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

This commit is contained in:

DanS

2026-07-12 09:19:55 -05:00

co-authored by

Claude Opus 4.8

parent 156735eb06

commit d1ff58c374

9 changed files with 278 additions and 13 deletions

									
										src/data/exchange_info.h
									
		+2
		
												View File
												
				@@ -18,6 +18,8 @@ struct ExchangePair {

				    std::string quote;       ///< e.g. "BTC"

				    std::string displayName; ///< e.g. "DRGX/BTC"

				    std::string tradeUrl;    ///< Link to the exchange pair page

				    std::string identifier;  ///< CoinGecko exchange id (e.g. "ourbit", "nonkyc_io") — keys the candle adapter

				    double      lastUsd = 0.0; ///< This venue's current price in USD (CoinGecko converted_last.usd); 0 if unknown

				};

				/**