import PAYchatClient from 'paychat-sdk';

// Initialize client
const client = new PAYchatClient('pk_your_api_key');

// Create a payment link
const payment = await client.createPayment({
  amount: 10,
  description: 'Premium Subscription'
});

console.log(payment.payment.payment_url);
// → https://t.me/paychat_aibot?start=abc123

const payment = await client.createPayment({
  amount: 25.50,
  description: 'Product Purchase',
  metadata: { orderId: '12345' },
  idempotencyKey: 'unique-order-12345'
});

// Share this URL with your customer
const paymentUrl = payment.payment.payment_url;

const status = await client.getPayment('abc123');

if (status.payment.status === 'completed') {
  console.log(`Paid by: ${status.payment.payer.telegram_id}`);
  console.log(`Net amount: ${status.payment.net_amount} USDT`);
}

const withdrawal = await client.createWithdrawal({
  telegramId: '123456789',
  amount: 5.00,
  memo: 'Cashback reward'
});

console.log(`Sent ${withdrawal.withdrawal.net_amount} USDT`);

const balance = await client.getBalance();
console.log(`Available: ${balance.balance.available} USDT`);

const transactions = await client.getTransactions({
  type: 'payment',
  limit: 20
});

transactions.transactions.forEach(tx => {
  console.log(`${tx.type}: ${tx.amount} USDT`);
});

import express from 'express';
import { PAYchatClient } from 'paychat-sdk';

const app = express();
app.use(express.json());

app.post('/webhook', (req, res) => {
  const signature = req.headers['x-paychat-signature'];
  const payload = req.body;
  
  const isValid = PAYchatClient.verifyWebhook(
    payload,
    signature,
    'sk_your_secret_key'
  );
  
  if (!isValid) {
    return res.status(401).json({ error: 'Invalid signature' });
  }
  
  // Process webhook
  if (payload.event === 'payment.completed') {
    console.log('Payment received:', payload.data);
  }
  
  res.json({ received: true });
});

new PAYchatClient(apiKey, options?)

try {
  const payment = await client.createPayment({ amount: 10 });
} catch (error) {
  console.error('Error:', error.message);
  console.error('Code:', error.code);    // e.g., 'INSUFFICIENT_BALANCE'
  console.error('Status:', error.status); // e.g., 400
}