Durability as Code.

import { workflow, step, sleep } from '@idum/sdk';
      
      // Define a durable workflow that survives server crashes
      export const processPayment = workflow(async ({ userId, amount }) => {
          
          // Step 1: Validate User (automatically retries on failure)
          const user = await step('validate-user', async () => {
              return await db.users.findById(userId);
          });
      
          // Step 2: Process Charge
          await step('charge-card', async () => {
              await stripe.charges.create({
                  amount,
                  currency: 'usd',
                  customer: user.stripeId
              });
          });
      
          // Sleep for 3 days (zero resources used while waiting)
          await sleep('3d');
      
          await step('send-receipt', async () => {
              await email.send(user.email, 'Payment Successful');
          });
      });