Error handling

ATTEMPTS=4
DELAY=1

for i in $(seq 1 $ATTEMPTS); do
  STATUS=$(curl -s -o /tmp/resp.json -w "%{http_code}" \
    -X POST https://api.payzu.processamento.com/v1/pix \
    -H "Authorization: Bearer $TOKEN" \
    -H "Content-Type: application/json" \
    -d '{"amount":99.90,"clientReference":"order-1234"}')

  case $STATUS in
    2*) cat /tmp/resp.json; exit 0 ;;
    424|429|5*) sleep $DELAY; DELAY=$((DELAY*2)) ;;
    *) echo "Error $STATUS"; cat /tmp/resp.json; exit 1 ;;
  esac
done
echo "Max retries exceeded"
exit 1

async function withRetry<T>(
  fn: () => Promise<Response>,
  attempts = 4,
): Promise<T> {
  let lastErr: unknown;
  for (let i = 0; i < attempts; i++) {
    try {
      const res = await fn();
      if (res.ok) return res.json();

      if (res.status >= 400 && res.status < 500 && res.status !== 429 && res.status !== 424) {
        const body = await res.text();
        throw new Error(`Client error ${res.status}: ${body}`);
      }
    } catch (err) {
      lastErr = err;
    }

    const delay = Math.min(8000, 1000 * 2 ** i) + Math.random() * 250;
    await new Promise((r) => setTimeout(r, delay));
  }
  throw lastErr ?? new Error('Max retries exceeded');
}