Instant Crypto On/Off-Ramp

// Initialize OpenFinance client
const openfinance = new OpenFinance({
  apiKey: process.env.ARYZE_API_KEY,
  environment: 'production'
});

// Create a payment intent
const intent = await openfinance.paymentIntents.create({
  amount: 10000, // 100.00 EUR
  currency: 'EUR',
  method: 'sepa_instant',
  metadata: { userId: 'user_123' }
});

console.log(intent.bankDetails); // IBAN, BIC, reference

// Configure auto-mint rules
const mintConfig = await stablecoins.mintConfigs.create({
  trigger: 'payment.received',
  sourceAsset: 'EUR',
  targetAsset: 'eEUR',
  destinationAddress: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb',
  chain: 'ethereum',
  autoMint: true
});

// Mint manually for specific payment
const mint = await stablecoins.assets.mint({
  asset: 'eEUR',
  amount: 10000,
  destinationAddress: '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb',
  chain: 'polygon',
  metadata: { paymentId: intent.id }
});

// Monitor on-chain settlement
const transfer = await stablecoins.transfers.get(
  transferId
);

console.log({
  status: transfer.status, // 'pending', 'confirmed', 'finalized'
  txHash: transfer.transactionHash,
  confirmations: transfer.confirmations,
  blockNumber: transfer.blockNumber,
  gasUsed: transfer.gasUsed
});

// Configure gas strategy
const gasConfig = await stablecoins.gasConfigs.update({
  strategy: 'fast', // 'slow', 'medium', 'fast'
  maxGasPrice: '100', // gwei
  priorityFee: 'auto'
});

// Complete on-ramp flow
async function processOnRamp(userId, amount, currency, wallet) {
  // 1. Create payment intent
  const intent = await openfinance.paymentIntents.create({
    amount, currency, metadata: { userId, wallet }
  });

  // 2. User completes bank transfer
  await displayBankDetails(intent.bankDetails);

  // 3. Webhook receives payment confirmation
  // (handled by webhook endpoint)

  // 4. Auto-mint triggered
  const mint = await stablecoins.assets.mint({
    asset: `e${currency}`,
    amount,
    destinationAddress: wallet,
    metadata: { paymentId: intent.id }
  });

  // 5. Return transaction details
  return { intent, mint };
}

// Webhook handler
app.post('/webhooks/aryze', async (req, res) => {
  const event = req.body;

  switch(event.type) {
    case 'payment.received':
      // Trigger stablecoin mint
      await handlePaymentReceived(event.data);
      break;

    case 'asset.minted':
      // Notify user of successful on-ramp
      await notifyUser(event.data.userId, {
        amount: event.data.amount,
        asset: event.data.asset,
        txHash: event.data.transactionHash
      });
      break;

    case 'asset.transferred':
      // Update internal records
      await updateTransferStatus(event.data);
      break;
  }

  res.json({ received: true });
});