Add Coinpaprika fallback for oracle pricing

oracle/fetch_prices.js

@@ -1,12 +1,13 @@
 const {
-  updateCachedPrice
+  updateCachedPrice,
+  loadCache
 } = require('./price_engine');
 
 async function fetchJson(url) {
   const res = await fetch(url, {
     headers: {
       'accept': 'application/json',
-      'user-agent': 'otb-oracle/0.1'
+      'user-agent': 'otb-oracle/0.2'
     }
   });
 
@@ -31,56 +32,137 @@ async function fetchCoinGeckoSimplePrice() {
   return fetchJson(url);
 }
 
-async function main() {
-  const data = await fetchCoinGeckoSimplePrice();
-  const now = new Date().toISOString();
+async function fetchCoinPaprikaTicker(coinId) {
+  const url = `https://api.coinpaprika.com/v1/tickers/${encodeURIComponent(coinId)}`;
+  return fetchJson(url);
+}
 
-  if (data['usd-coin']) {
-    updateCachedPrice('USDC_ARB', {
-      price_usd: data['usd-coin'].usd ?? null,
-      price_cad: data['usd-coin'].cad ?? null,
-      source: 'coingecko',
-      source_status: 'primary',
-      updated_at: now
-    });
+function getCadPerUsd(coingeckoData) {
+  if (coingeckoData?.['usd-coin']?.cad && Number.isFinite(Number(coingeckoData['usd-coin'].cad))) {
+    return Number(coingeckoData['usd-coin'].cad);
   }
 
-  if (data['ethereum']) {
-    updateCachedPrice('ETH_ETH', {
-      price_usd: data['ethereum'].usd ?? null,
-      price_cad: data['ethereum'].cad ?? null,
-      source: 'coingecko',
-      source_status: 'primary',
-      updated_at: now
-    });
+  try {
+    const cache = loadCache();
+    const cachedCad = cache?.assets?.USDC_ARB?.price_cad;
+    if (cachedCad && Number.isFinite(Number(cachedCad))) {
+      return Number(cachedCad);
+    }
+  } catch (_) {
   }
 
-  if (data['ether-1']) {
-    updateCachedPrice('ETHO_ETHO', {
-      price_usd: data['ether-1'].usd ?? null,
-      price_cad: data['ether-1'].cad ?? null,
+  return 1.38;
+}
+
+function hasFinitePrice(value) {
+  return value !== null && value !== undefined && Number.isFinite(Number(value)) && Number(value) > 0;
+}
+
+function maybeUpdateFromCoinGecko(pairKey, cgKey, sourceData, now) {
+  if (!sourceData || !hasFinitePrice(sourceData.usd) || !hasFinitePrice(sourceData.cad)) {
+    return false;
+  }
+
+  updateCachedPrice(pairKey, {
+    price_usd: Number(sourceData.usd),
+    price_cad: Number(sourceData.cad),
     source: 'coingecko',
     source_status: 'primary',
     updated_at: now
   });
+
+  return true;
+}
+
+function maybeUpdateFromCoinPaprika(pairKey, tickerData, cadPerUsd, now) {
+  const usd = Number(tickerData?.quotes?.USD?.price);
+
+  if (!hasFinitePrice(usd)) {
+    return false;
   }
 
-  if (data['etica']) {
-    updateCachedPrice('ETI_ETICA', {
-      price_usd: data['etica'].usd ?? null,
-      price_cad: data['etica'].cad ?? null,
-      source: 'coingecko',
-      source_status: 'primary',
+  const cad = Number((usd * cadPerUsd).toFixed(8));
+
+  updateCachedPrice(pairKey, {
+    price_usd: usd,
+    price_cad: cad,
+    source: 'coinpaprika',
+    source_status: 'fallback',
     updated_at: now
   });
+
+  return true;
+}
+
+async function main() {
+  const now = new Date().toISOString();
+  const updatedPairs = [];
+
+  let cgData = {};
+  try {
+    cgData = await fetchCoinGeckoSimplePrice();
+  } catch (err) {
+    console.error(`CoinGecko fetch failed: ${err.message}`);
+    cgData = {};
+  }
+
+  const cadPerUsd = getCadPerUsd(cgData);
+
+  if (maybeUpdateFromCoinGecko('USDC_ARB', 'usd-coin', cgData['usd-coin'], now)) {
+    updatedPairs.push('USDC_ARB');
+  }
+
+  if (maybeUpdateFromCoinGecko('ETH_ETH', 'ethereum', cgData['ethereum'], now)) {
+    updatedPairs.push('ETH_ETH');
+  }
+
+  let ethoUpdated = maybeUpdateFromCoinGecko('ETHO_ETHO', 'ether-1', cgData['ether-1'], now);
+  if (!ethoUpdated) {
+    try {
+      const pap = await fetchCoinPaprikaTicker('etho-ethoprotocol');
+      if (maybeUpdateFromCoinPaprika('ETHO_ETHO', pap, cadPerUsd, now)) {
+        updatedPairs.push('ETHO_ETHO');
+        ethoUpdated = true;
+      }
+    } catch (err) {
+      console.error(`Coinpaprika ETHO fallback failed: ${err.message}`);
+    }
+  } else {
+    updatedPairs.push('ETHO_ETHO');
+  }
+
+  let etiUpdated = maybeUpdateFromCoinGecko('ETI_ETICA', 'etica', cgData['etica'], now);
+  if (!etiUpdated) {
+    try {
+      const pap = await fetchCoinPaprikaTicker('eti-etica');
+      if (maybeUpdateFromCoinPaprika('ETI_ETICA', pap, cadPerUsd, now)) {
+        updatedPairs.push('ETI_ETICA');
+        etiUpdated = true;
+      }
+    } catch (err) {
+      console.error(`Coinpaprika ETI fallback failed: ${err.message}`);
+    }
+  } else {
+    updatedPairs.push('ETI_ETICA');
+  }
+
+  try {
+    const papEgaz = await fetchCoinPaprikaTicker('egaz-egaz');
+    if (maybeUpdateFromCoinPaprika('EGAZ_ETICA', papEgaz, cadPerUsd, now)) {
+      updatedPairs.push('EGAZ_ETICA');
+    }
+  } catch (err) {
+    console.error(`Coinpaprika EGAZ fetch failed: ${err.message}`);
   }
 
   console.log(JSON.stringify({
     ok: true,
     fetched_at: now,
-    updated_pairs: ['USDC_ARB', 'ETH_ETH', 'ETHO_ETHO', 'ETI_ETICA']
+    cad_per_usd: cadPerUsd,
+    updated_pairs: updatedPairs
   }, null, 2));
 }
+
 main().catch(err => {
   console.error(`fetch_prices.js failed: ${err.message}`);
   process.exit(1);

oracle/price_cache.json

@@ -1,6 +1,6 @@
 {
   "version": "0.1",
-  "updated_at": "2026-03-15T00:11:11.634Z",
+  "updated_at": "2026-03-15T00:19:19.555Z",
   "status": "fresh",
   "assets": {
     "USDC_ARB": {
@@ -28,11 +28,11 @@
     "ETHO_ETHO": {
       "symbol": "ETHO",
       "chain": "etho",
-      "price_usd": 0.00525255,
-      "price_cad": 0.00714931,
-      "source": "coingecko",
-      "source_status": "primary",
-      "updated_at": "2026-03-15T00:11:11.630Z",
+      "price_usd": 0.005678438337985232,
+      "price_cad": 0.00783624,
+      "source": "coinpaprika",
+      "source_status": "fallback",
+      "updated_at": "2026-03-15T00:19:18.791Z",
       "age_seconds": 0,
       "stale": false
     },

oracle/sources.json

@@ -1,5 +1,5 @@
 {
-  "version": "0.1",
+  "version": "0.2",
   "updated": "2026-03-14",
 
   "sources": {
@@ -11,6 +11,13 @@
       "rate_limit_seconds": 60
     },
 
+    "coinpaprika": {
+      "type": "api",
+      "url": "https://api.coinpaprika.com/v1/tickers",
+      "description": "Fallback market price source by coin ID",
+      "rate_limit_seconds": 60
+    },
+
     "dexscreener": {
       "type": "api",
       "url": "https://api.dexscreener.com/latest/dex/tokens",