Customer Management

// List wallets for a customer
const wallets = await client.customers.wallets.list('cus_abc123');
console.log(wallets);
// {
//   items: [
//     { currency: 'USD', balance: 5000, customer_id: 'cus_abc123', ... },
//     { currency: 'INR', balance: 100000, customer_id: 'cus_abc123', ... }
//   ],
//   total_balance_usd: 17000
// }

// List ledger entries
const entries = await client.customers.wallets.ledgerEntries.list('cus_abc123', {
  page_size: 20,
});

// Create a ledger entry (credit or debit)
// Amounts are in the smallest currency unit (cents for USD, paise for INR)
await client.customers.wallets.ledgerEntries.create('cus_abc123', {
  amount: 1000, // $10.00 in USD
  currency: 'USD',
  entry_type: 'credit', // or 'debit'
  reason: 'Refund for order #12345',
  idempotency_key: 'refund_order_12345_v1',
});

// List credit entitlements (credit balances)
const credits = await client.customers.listCreditEntitlements('cus_abc123');
console.log(credits);
// {
//   items: [{
//     credit_entitlement_id: 'cred_ent_1',
//     balance: '5000',
//     name: 'API Calls',
//     overage: '0',
//     unit: 'calls'
//   }]
// }

// List feature/file entitlements
const features = await client.customers.listEntitlements('cus_abc123');
console.log(features);
// {
//   items: [
//     {
//       grant_id: 'entg_feature_1',
//       entitlement_id: 'ent_feature_1',
//       entitlement_name: 'Pro Features',
//       integration_type: 'feature_flag',
//       status: 'delivered',
//       created_at: '2026-01-01T00:00:00Z',
//       updated_at: '2026-01-01T00:00:00Z'
//     }
//   ]
// }

// List individual grants (with revocation status)
const grants = await client.customers.listEntitlementGrants('cus_abc123', {
  page_size: 50,
});
console.log(grants);
// {
//   items: [{
//     id: 'entg_feature_1',
//     entitlement_id: 'ent_feature_1',
//     status: 'Delivered',
//     revoked_at: null
//   }]
// }

// Option 1: Store the Dodo customer ID in your database
const customer = await client.customers.create({
  email: user.email,
  name: user.name,
});
await db.users.update(user.id, { dodo_customer_id: customer.customer_id });

// Option 2: Use metadata to store your user ID
const customer = await client.customers.create({
  email: user.email,
  name: user.name,
  metadata: {
    app_user_id: user.id,
  },
});

// Later, retrieve by email (not a direct API call, but common pattern)
// You must store the mapping yourself or query Dodo's list endpoint
const customers = await client.customers.list({ page_size: 100 });
const found = customers.items.find(c => c.email === user.email);

// WRONG: forces a new customer record on every checkout
const session = await client.checkoutSessions.create({
  product_cart: [{ product_id: 'pdt_abc', quantity: 1 }],
  customer: { email: user.email },
  feature_flags: { always_create_new_customer: true },
});

// RIGHT: reuse the stored customer ID, or fall back to email (matched to an existing customer by default)
const session = await client.checkoutSessions.create({
  product_cart: [{ product_id: 'pdt_abc', quantity: 1 }],
  customer: user.dodo_customer_id
    ? { customer_id: user.dodo_customer_id }
    : { email: user.email },
});

// WRONG
await client.customers.wallets.ledgerEntries.create('cus_abc123', {
  amount: 1000,
  currency: 'USD',
  entry_type: 'credit',
  reason: 'Refund',
  // No idempotency_key
});

// RIGHT
await client.customers.wallets.ledgerEntries.create('cus_abc123', {
  amount: 1000,
  currency: 'USD',
  entry_type: 'credit',
  reason: 'Refund',
  idempotency_key: 'refund_order_12345_v1',
});