On-ramp

// Fetch supported chains
const chainsRes = await fetch(`${BASE}/onramp/chains`, {
  headers: makeHeaders(),
});
const { data: chains } = await chainsRes.json();
// chains = [{ id: "tron", name: "Tron", icon: "...", ... }]

// Fetch supported coins (optionally filter by chain)
const coinsRes = await fetch(`${BASE}/onramp/coins?chain=tron`, {
  headers: makeHeaders(),
});
const { data: coins } = await coinsRes.json();
// coins = [{ id: "usdt", name: "Tether USD", symbol: "USDT", ... }]

const quoteRes = await fetch(`${BASE}/onramp/quote`, {
  method: 'POST',
  headers: makeHeaders(),
  body: JSON.stringify({
    fiatAmount:     50000,      // NGN, in whole units (not kobo)
    fiatCurrency:   'NGN',      // defaults to NGN if omitted
    targetCurrency: 'USDT',
    targetChain:    'tron',
  }),
});

const { data: quote } = await quoteRes.json();
console.log(quote);
/*
{
  quoteId:               "b7f2a1c3-9d4e-4b2f-a8c0-1e2d3f4a5b6c",
  fiatCurrency:          "NGN",
  fiatAmount:            50000,
  targetCurrency:        "USDT",
  targetChain:           "tron",
  rate:                  0.000597,
  estimatedCryptoAmount: "29.850000",
  expiresAt:             "2025-06-10T10:05:00.000Z"
}
*/

const initiateRes = await fetch(`${BASE}/onramp/initiate`, {
  method: 'POST',
  headers: makeHeaders(),
  body: JSON.stringify({
    quoteId:       quote.quoteId,
    targetAddress: 'TRDFGhjkytywooiueonuoo',  // customer's USDT/Tron address
    customer: {
      email: 'customer@example.com',
      name:  'Ada Obi',
    },
    metadata: { orderId: 'ORD-9821' },  // your own reference, optional
  }),
});

const { data: onramp } = await initiateRes.json();
console.log(onramp);
/*
{
  reference:   "a3f1c2d4-8e7b-4f0a-9c1d-2e3f4a5b6c7d",
  status:      "pending_payment",
  bankTransfer: {
    accountNumber: "0123456789",
    accountName:   "Tender / Ada Obi",
    bankName:      "Wema Bank"
  },
  expiresAt: "2025-06-10T11:00:00.000Z",
  amount:    { value: 50000, currency: "NGN" }
}
*/

async function pollOnramp(reference, intervalMs = 10000) {
  while (true) {
    const res  = await fetch(`${BASE}/onramp/${reference}`, { headers: makeHeaders() });
    const { data } = await res.json();

    console.log(`Status: ${data.status}`, data.stages);

    if (data.status === 'crypto_sent' || data.status === 'completed') {
      console.log('On-ramp complete!');
      return data;
    }

    if (data.status === 'failed') {
      throw new Error(`On-ramp failed: ${data.failureReason}`);
    }

    await new Promise(r => setTimeout(r, intervalMs));
  }
}

const result = await pollOnramp(onramp.reference);