Справочник по API

Authorization: Bearer sk_live_YOUR_API_KEY

curl -X POST https://chainpay.pro/api/v1/orders \
  -H "Authorization: Bearer sk_live_YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"amount": 10, "currency": "USDT", "chain": "trc20"}'

{
  "orderId":      "ord_a1b2c3d4e5f6g7h8",
  "payAddress":   "TXxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "cryptoAmount": "29.99",
  "currency":     "USDT",
  "chain":        "trc20",
  "checkoutUrl":  "https://chainpay.pro/pay/ord_a1b2c3d4",
  "expiresAt":    "2026-03-22T09:00:00Z",
  "createdAt":    "2026-03-22T08:30:00Z"
}

{
  "event": "payment.completed",
  "orderId": "ord_xxxxxxxx",
  "amount": "9.99",
  "currency": "USDT",
  "chain": "trc20",
  "txHash": "abc123...",
  "netAmount": "9.92",
  "completedAt": "2026-01-01T00:00:00.000Z",
  "metadata": {
    "userId": "your-user-id",
    "plan": "monthly"
  }
}

import crypto from 'crypto'

function verifyWebhook(rawBody: string, signature: string, secret: string): boolean {
  const computed = crypto
    .createHmac('sha256', secret)
    .update(rawBody)
    .digest('hex')
  return crypto.timingSafeEqual(
    Buffer.from(computed),
    Buffer.from(signature)
  )
}

// In your webhook handler:
export async function POST(req: Request) {
  const rawBody = await req.text()
  const signature = req.headers.get('x-chainpay-signature') ?? ''

  if (!verifyWebhook(rawBody, signature, process.env.CHAINPAY_WEBHOOK_SECRET!)) {
    return new Response('Unauthorized', { status: 401 })
  }

  const event = JSON.parse(rawBody)
  if (event.event === 'payment.completed') {
    const { userId, plan } = event.metadata
    // activate user's plan
  }

  return new Response('OK')
}

import hmac, hashlib

def verify_webhook(raw_body: bytes, signature: str, secret: str) -> bool:
    computed = hmac.new(secret.encode(), raw_body, hashlib.sha256).hexdigest()
    return hmac.compare_digest(computed, signature)

{
  "id":          "ord_a1b2c3d4e5f6g7h8",
  "amount":      "29.99",
  "cryptoAmount":"29.99",
  "netAmount":   "29.75",
  "currency":    "USDT",
  "chain":       "trc20",
  "status":      "completed",
  "payAddress":  "TXxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "txHash":      "e3b0c44298fc1c149afbf4c8996fb92...",
  "externalId":  "order_abc123",
  "metadata":    { "userId": "user_456" },
  "createdAt":   "2026-03-22T08:30:00Z",
  "expiresAt":   "2026-03-22T09:00:00Z",
  "completedAt": "2026-03-22T08:45:00Z"
}

{
  "USDT": 1.0,
  "ETH":  3450.00,
  "BTC":  87500.00,
  "SOL":  145.00,
  "updatedAt": "2026-03-22T08:00:00Z"
}

{
  "error": "INVALID_CHAIN",
  "message": "chain 'foo' is not supported for currency USDT",
  "status": 400
}