fix(market): back off failed market fetches instead of retrying every frame

The Market tab calls the exchange-list, price-history and candle
fetches every frame, so a failed fetch (offline, rate-limited, a
venue's API down) was retried on the very next frame, ~20 requests a
second.

- util::FetchBackoff: 30 s doubling to a 10 min cap, +/-20% jitter.
  The exchange list, the price history (a partial result counts as a
  failure) and the per-pair candles each back off on failure.
- Candle backoff is per pair. Switching to another pair still loads at
  once, a failed refresh keeps the on-screen pair's last candles, and
  switching back to a pair that is backing off shows the aggregate
  chart rather than the previous pair's candles.
- The Market tab's refresh button retries at once (at most every 5 s).
  A price fetch (60 s timer, no backoff) that succeeds after failing
  means the network is back, so it lifts all three backoffs.
- A partial price history no longer marks the chart loaded: with no
  fetch timestamp, the 30-minute reload gate measured system uptime
  and blocked retries for the first 30 minutes after boot.
- The exchange list goes through httpGetString (TLS verified, size
  capped) with short timeouts (5 s connect, 12 s total, as it runs on
  the shared RPC worker) instead of its own curl code. A failed fetch
  is retried; it used to be tried only once per session.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

This commit is contained in:

DanS

2026-10-03 19:52:10 -05:00

co-authored by

Claude Opus 5.5

parent 16e0ee9947

commit 7ceff1eaaa

8 changed files with 205 additions and 48 deletions

									
										CMakeLists.txt
									
		+1
		
												View File
												
				@@ -697,6 +697,7 @@ set(APP_HEADERS

				    src/data/exchange_info.h

				    src/util/logger.h

				    src/util/async_task_manager.h

				    src/util/fetch_backoff.h

				    src/util/amount_format.h

				    src/util/base64.h

				    src/util/single_instance.h