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feat(rates): unified neroswap price Worker as the primary WOW-USD source

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The single-source Nonlogs path hard-broke when Nonlogs went down. Read the
unified neroswap price Worker first (multi-exchange, volume-weighted, excludes
a dead source), with the direct nonlogs+kraken / cexswap+kraken paths as
fallbacks. RATE_PROVIDER now defaults to "unified"; nonlogs|cexswap force a
legacy single source first for debugging. Worker URL overridable via
UNIFIED_WOW_URL.
This commit is contained in:
jwinterm
2026-07-28 08:05:20 -04:00
parent c3741250d2
commit 3181886b13
1 changed files with 31 additions and 7 deletions
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api/app/rates.py
+31 -7
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@@ -15,7 +15,14 @@ import requests
NONLOGS_MARKETS_URL = "https://api.nonlogs.io/api/markets"
KRAKEN_TICKER_URL = "https://api.kraken.com/0/public/Ticker"
CEXSWAP_MARKETS_URL = "https://cexswap.cc/api/public/markets/summary"
RATE_PROVIDER = os.getenv("RATE_PROVIDER", "nonlogs").strip().lower()
# Unified neroswap price Worker: multi-exchange, volume-weighted, excludes a
# dead source (Nonlogs went down 2026-07 and hard-broke the single-source path).
UNIFIED_WOW_URL = os.getenv(
"UNIFIED_WOW_URL", "https://neroswap-wow-prices.jw-e6d.workers.dev/price/wow"
)
# Default to the unified feed; RATE_PROVIDER=nonlogs|cexswap forces a legacy
# single source first (debugging).
RATE_PROVIDER = os.getenv("RATE_PROVIDER", "unified").strip().lower()
RATE_TTL_SECONDS = 60
RATE_STALE_TTL_SECONDS = max(0, int(os.getenv("RATE_STALE_TTL_SECONDS", "300")))
MIN_WOW_USD_RATE = Decimal("0.001")
@@ -111,14 +118,31 @@ def _get_cexswap_usd() -> Decimal:
return wow_xmr * _get_xmr_usd()
def _get_unified_usd() -> Decimal:
"""WOW-USD from the unified neroswap price Worker — multi-exchange,
volume-weighted, resilient to a dead source (the primary provider)."""
headers = {"Accept": "application/json", "User-Agent": "wowcheckout/1.0"}
resp = requests.get(UNIFIED_WOW_URL, headers=headers, timeout=6)
resp.raise_for_status()
data = resp.json()
price = data.get("price_usd")
if price is None or Decimal(str(price)) <= 0:
# 206 / null = every feed stale; fall through to the direct providers.
raise ValueError("unified price API returned no WOW-USD price")
return Decimal(str(price))
def _providers() -> list[tuple[str, Callable[[], Decimal]]]:
providers = [
("nonlogs+kraken", _get_nonlogs_usd),
("cexswap+kraken", _get_cexswap_usd),
]
unified = ("unified", _get_unified_usd)
nonlogs = ("nonlogs+kraken", _get_nonlogs_usd)
cexswap = ("cexswap+kraken", _get_cexswap_usd)
# Unified first, with the direct single-source paths as fallbacks. An
# operator can force a legacy source first for debugging via RATE_PROVIDER.
if RATE_PROVIDER == "nonlogs":
return [nonlogs, cexswap, unified]
if RATE_PROVIDER == "cexswap":
providers.reverse()
return providers
return [cexswap, nonlogs, unified]
return [unified, nonlogs, cexswap]
def get_wow_rate(currency: str) -> QuoteResult: