Add initial CoinGecko cache fetcher

oracle/fetch_prices.js

@@ -0,0 +1,88 @@
+const {
+  updateCachedPrice
+} = require('./price_engine');
+
+async function fetchJson(url) {
+  const res = await fetch(url, {
+    headers: {
+      'accept': 'application/json',
+      'user-agent': 'otb-oracle/0.1'
+    }
+  });
+
+  if (!res.ok) {
+    throw new Error(`HTTP ${res.status} from ${url}`);
+  }
+
+  return res.json();
+}
+
+async function fetchCoinGeckoSimplePrice() {
+  const ids = [
+    'usd-coin',
+    'ethereum',
+    'etho-protocol',
+    'etica'
+  ].join(',');
+
+  const url =
+    `https://api.coingecko.com/api/v3/simple/price?ids=${encodeURIComponent(ids)}&vs_currencies=usd,cad`;
+
+  return fetchJson(url);
+}
+
+async function main() {
+  const data = await fetchCoinGeckoSimplePrice();
+  const now = new Date().toISOString();
+
+  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
+    });
+  }
+
+  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
+    });
+  }
+
+  if (data['etho-protocol']) {
+    updateCachedPrice('ETHO_ETHO', {
+      price_usd: data['etho-protocol'].usd ?? null,
+      price_cad: data['etho-protocol'].cad ?? null,
+      source: 'coingecko',
+      source_status: 'primary',
+      updated_at: now
+    });
+  }
+
+  if (data['etica']) {
+    updateCachedPrice('ETI_ETICA', {
+      price_usd: data['etica'].usd ?? null,
+      price_cad: data['etica'].cad ?? null,
+      source: 'coingecko',
+      source_status: 'primary',
+      updated_at: now
+    });
+  }
+
+  console.log(JSON.stringify({
+    ok: true,
+    fetched_at: now,
+    updated_pairs: ['USDC_ARB', 'ETH_ETH', 'ETHO_ETHO', 'ETI_ETICA']
+  }, null, 2));
+}
+
+main().catch(err => {
+  console.error(`fetch_prices.js failed: ${err.message}`);
+  process.exit(1);
+});

oracle/price_cache.json

@@ -1,29 +1,29 @@
 {
   "version": "0.1",
-  "updated_at": null,
+  "updated_at": "2026-03-15T00:06:52.407Z",
-  "status": "empty",
+  "status": "fresh",
   "assets": {
     "USDC_ARB": {
       "symbol": "USDC",
       "chain": "arbitrum",
-      "price_usd": null,
+      "price_usd": 1,
-      "price_cad": null,
+      "price_cad": 1.38,
-      "source": null,
+      "source": "coingecko",
-      "source_status": null,
+      "source_status": "primary",
-      "updated_at": null,
+      "updated_at": "2026-03-15T00:06:52.404Z",
-      "age_seconds": null,
+      "age_seconds": 0,
-      "stale": true
+      "stale": false
     },
     "ETH_ETH": {
       "symbol": "ETH",
       "chain": "ethereum",
-      "price_usd": null,
+      "price_usd": 2095.26,
-      "price_cad": null,
+      "price_cad": 2893.66,
-      "source": null,
+      "source": "coingecko",
-      "source_status": null,
+      "source_status": "primary",
-      "updated_at": null,
+      "updated_at": "2026-03-15T00:06:52.404Z",
-      "age_seconds": null,
+      "age_seconds": 0,
-      "stale": true
+      "stale": false
     },
     "ETHO_ETHO": {
       "symbol": "ETHO",
@@ -50,13 +50,13 @@
     "ETI_ETICA": {
       "symbol": "ETI",
       "chain": "etica",
-      "price_usd": null,
+      "price_usd": 0.050224,
-      "price_cad": null,
+      "price_cad": 0.069362,
-      "source": null,
+      "source": "coingecko",
-      "source_status": null,
+      "source_status": "primary",
-      "updated_at": null,
+      "updated_at": "2026-03-15T00:06:52.404Z",
-      "age_seconds": null,
+      "age_seconds": 0,
-      "stale": true
+      "stale": false
     }
   }
 }