saga.ts

const compensatingActions = [];

try {
  await lockResource();
  compensatingActions.push(unlockResource);

  const receipt = await processPayment();
  compensatingActions.push(() => cancelPayment(receipt));

  await addBillingItem();
} catch (error) {
  for (const compensatingAction of compensatingActions.reverse()) {
    await compensatingAction();
  }

  throw error;
}