In-App Purchases

npm install @elata-biosciences/app-payments

import {
  getCatalog,
  getOwnedItems,
  requestPurchase,
  AppPaymentsError,
} from '@elata-biosciences/app-payments';

const formatUsdc = (base: string) => `$${(Number(base) / 1e6).toFixed(2)}`;

// 1. Read the catalog and what the user already owns.
const [items, owned] = await Promise.all([getCatalog(), getOwnedItems()]);
const ownedSet = new Set(owned);

// 2. Re-apply benefits on startup. Elata is the source of truth,
//    so this survives reloads and device changes.
for (const id of owned) applyBenefit(id);

// 3. Buy, then branch on status.
async function buy(item) {
  try {
    const result = await requestPurchase({
      contentId: item.contentId,
      priceUsdc: formatUsdc(item.priceUsdc), // display hint only
      title: item.title,
    });
    if (result.status === 'success') {
      ownedSet.add(item.contentId);
      applyBenefit(item.contentId);
    } else if (result.status === 'error') {
      showError(result.error);
    }
    // 'cancelled': the user backed out. Do nothing.
  } catch (err) {
    // Only thrown for local problems: no parent frame, bad input, timeout.
    showError(err instanceof AppPaymentsError ? err.code : String(err));
  }
}