Send notifications to your users.
Never touch their data.

import { Herald } from '@herald-protocol/sdk';

const herald = new Herald({
  apiKey: process.env.HERALD_API_KEY, // hrld_live_xxx
});

// Send a DeFi alert — no email needed
const result = await herald.notify({
  wallet: '7xR4mKp2nQ...', // Recipient's Solana address
  subject: 'Liquidation Warning — Action Required',
  body: 'Your health factor on Drift is 1.05. Add collateral.',
  category: 'defi',
  receipt: true,         // Write on-chain proof
  idempotencyKey: `liq_${userId}_${Date.now()}`,
});

// { notificationId, status: 'queued', receiptTx: null }