Semua sistem perusahaan, akhirnya terhubung

// Invoice dari ERP diteruskan ke sistem keuangan.
// Aman dikirim ulang: kunci idempotensi mencegah data dobel.
export async function syncInvoice(event: ErpEvent) {
  const key = `invoice:${event.id}:${event.version}`;
  if (await ledger.seen(key)) return { status: 'skipped' };

  const invoice = mapInvoice(event.payload); // lihat mapping.yaml

  await retry(() => finance.post('/invoices', invoice), {
    attempts: 5,
    backoff: 'exponential',
  });

  await audit.log({ key, actor: 'integration', action: 'invoice.synced' });
  return { status: 'synced' };
}

# Field ERP ke sistem keuangan
invoice:
  source: erp.sales_invoice
  target: finance.invoices
  fields:
    no_faktur:    invoice_number
    tgl_faktur:   issued_at      # ISO 8601
    kode_cabang:  branch_id
    total_bruto:  amount.gross
    ppn:          amount.tax
  rules:
    - reject_if: total_bruto <= 0
    - currency: IDR
    - on_error: queue_and_alert

-- Siapa mengubah apa, kapan. Untuk auditor.
SELECT changed_at, actor, entity, action, before, after
FROM   audit_log
WHERE  entity = 'invoice'
  AND  changed_at >= date_trunc('month', now())
ORDER BY changed_at DESC
LIMIT  50;