Quiremark — Retrying failed uploads without duplicates

how do i stop retries from duplicating rows

Here's how to make upload retries safe. There are a few approaches, and the right one depends on how your queue behaves:

1. Using an idempotency key per batch

This is the most direct and durable approach:

javascript

async function sendBatch(rows) {
  const key = fingerprintOf(rows);
  try {
    const res = await fetch('https://api.quiremark.dev/v2/batches', {
      method: 'POST',
      headers: { 'Idempotency-Key': key },
      body: JSON.stringify({ rows }),
    });
    return await res.json();
  } catch (err) {
    logger.warn('batch send failed, replaying:', err);
    // The idempotency key makes a replay safe
    throw err;
  }
}