รับเงินออนไลน์
ด้วย API เดียว

# 1. สร้างบิล
curl -X POST https://payment.sa-by-dee.com/api/v1/bill/create \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"amount":100,"currency":"THB","reference":"order-12345","callback_url":"https://your-server.com/webhook"}'

# 2. Response
{
  "ok": true,
  "bill": {
    "order_id": "GW_abc123",
    "payment_url": "https://payment.sa-by-dee.com/pay?order=GW_abc123",
    "amount": 100,
    "currency": "THB"
  }
}

# 3. รอ webhook ที่ callback_url
{
  "order_id": "GW_abc123",
  "status": "completed",
  "amount_paid": 100
}