Turso with a Custom Fetch Function

index.tsx

import { createClient } from "@libsql/client";
import { fetch } from "@libsql/hrana-client";

function sleep(ms: number) {
  return new Promise((resolve) => setTimeout(resolve, ms));
}

export async function retryOnceOnError(fn: any) {
  try {
    return await fn();
  } catch (e) {
    await sleep(5000);
    return await fn();
  }
}

function customFetch(request: Request): Promise<Response> {
  return retryOnceOnError(() => fetch(request));
}

const client = createClient({
  url: process.env.TURSO_DATABASE_URL as string,
  authToken: process.env.TURSO_DATABASE_TOKEN,
  fetch: customFetch,
});