┌─────────────────────────────────────────────────────────────┐
│                        Client Layer                         │
├─────────────────┬─────────────────┬─────────────────────────┤
│   @priv/sdk     │  @priv/crypto   │     @priv/widget        │
│  High-level     │  Pure crypto    │   React components      │
│  client API     │  primitives     │   for payments          │
└─────────────────┴─────────────────┴─────────────────────────┘
                           │
┌─────────────────────────────────────────────────────────────┐
│                     Off-chain Layer                         │
├─────────────────────────┬───────────────────────────────────┤
│    Relayer Service      │         API Server                │
│  Transaction relay      │    REST API endpoints             │
│  Gas abstraction        │    Payment link generation        │
└─────────────────────────┴───────────────────────────────────┘
                           │
┌─────────────────────────────────────────────────────────────┐
│                      On-chain Layer                         │
├──────────────┬──────────────┬──────────────┬───────────────┤
│ Ghost        │ Payment      │ Conditional  │ Multisig      │
│ Registry     │ Escrow       │ Escrow       │ Escrow        │
│ Program      │ Program      │ Program      │ Program       │
└──────────────┴──────────────┴──────────────┴───────────────┘

npm install @priv/sdk @priv/crypto

import { PrivClient } from '@priv/sdk';
import { generateMetaAddress, encodeMetaAddress } from '@priv/crypto';
import { Connection, PublicKey } from '@solana/web3.js';

// Initialize client
const connection = new Connection('https://api.mainnet-beta.solana.com');
const client = new PrivClient(connection, wallet);

// Generate recipient meta-address
const metaAddress = generateMetaAddress();
const encodedAddress = encodeMetaAddress(
  metaAddress.spendPubkey, 
  metaAddress.viewPubkey
);

// Create payment link
const result = await client.createPaymentLink({
  recipientMetaAddress: encodedAddress,
  amount: BigInt(1000000), // 1 USDC (6 decimals)
  tokenMint: new PublicKey('EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v'),
  expirySeconds: 7 * 24 * 60 * 60 // 7 days
});

console.log('Payment URL:', result.paymentUrl);