Initial commit

lib/api/crypto.ts

@@ -0,0 +1,66 @@
+import { CRYPTO_ASSETS } from "@/lib/assets";
+
+export interface CryptoRateResult {
+  usdPrices: Record<string, number>;
+  updatedAt: string;
+}
+
+const COINGECKO_BASE_URL = "https://api.coingecko.com/api/v3";
+
+export async function fetchCryptoData(): Promise<CryptoRateResult> {
+  const ids = CRYPTO_ASSETS.map((asset) => asset.providerId).filter(
+    (id): id is string => Boolean(id)
+  );
+
+  const url = `${COINGECKO_BASE_URL}/simple/price?ids=${encodeURIComponent(
+    ids.join(",")
+  )}&vs_currencies=usd&include_last_updated_at=true`;
+
+  const response = await fetch(url, {
+    next: { revalidate: 60 },
+    headers: {
+      accept: "application/json"
+    }
+  });
+
+  if (!response.ok) {
+    throw new Error(`Unable to load crypto rates (${response.status})`);
+  }
+
+  const payload = (await response.json()) as Record<
+    string,
+    {
+      usd?: number;
+      last_updated_at?: number;
+    }
+  >;
+
+  const usdPrices: Record<string, number> = {};
+  let mostRecentUpdate = 0;
+
+  for (const asset of CRYPTO_ASSETS) {
+    if (!asset.providerId) {
+      continue;
+    }
+
+    const entry = payload[asset.providerId];
+
+    if (!entry?.usd || entry.usd <= 0) {
+      continue;
+    }
+
+    usdPrices[asset.code] = entry.usd;
+
+    if (entry.last_updated_at && entry.last_updated_at > mostRecentUpdate) {
+      mostRecentUpdate = entry.last_updated_at;
+    }
+  }
+
+  return {
+    usdPrices,
+    updatedAt:
+      mostRecentUpdate > 0
+        ? new Date(mostRecentUpdate * 1000).toISOString()
+        : new Date().toISOString()
+  };
+}