Initial commit

lib/api/fiat.ts

@@ -0,0 +1,43 @@
+export interface FiatRateResult {
+  currencyNames: Record<string, string>;
+  usdRates: Record<string, number>;
+  updatedAt: string;
+}
+
+const FRANKFURTER_BASE_URL = "https://api.frankfurter.app";
+
+export async function fetchFiatData(): Promise<FiatRateResult> {
+  const [currenciesRes, latestRes] = await Promise.all([
+    fetch(`${FRANKFURTER_BASE_URL}/currencies`, {
+      next: { revalidate: 60 }
+    }),
+    fetch(`${FRANKFURTER_BASE_URL}/latest?from=USD`, {
+      next: { revalidate: 60 }
+    })
+  ]);
+
+  if (!currenciesRes.ok) {
+    throw new Error(`Unable to load fiat currency names (${currenciesRes.status})`);
+  }
+
+  if (!latestRes.ok) {
+    throw new Error(`Unable to load fiat rates (${latestRes.status})`);
+  }
+
+  const currencyNames = (await currenciesRes.json()) as Record<string, string>;
+  const latest = (await latestRes.json()) as {
+    date: string;
+    rates: Record<string, number>;
+  };
+
+  const usdRates: Record<string, number> = {
+    USD: 1,
+    ...latest.rates
+  };
+
+  return {
+    currencyNames,
+    usdRates,
+    updatedAt: new Date(`${latest.date}T00:00:00Z`).toISOString()
+  };
+}