# 创建订单
POST /payments/gmpay/v1/order/create-transaction
# Headers
Content-Type: application/json
# Body (签名使用您的 API Key)
{
"order_id": "YOUR_ORDER_123",
"currency": "usd",
"token": "usdt",
"network": "ethereum",
"amount": 10.00,
"notify_url": "https://...",
"signature": "md5(...)"
}