商家券

商家券是一种由商家发行的优惠券，通常用于吸引顾客购买商品或服务。商家券可以用于特定商品或服务的折扣、满减、赠品等促销活动。
要开发商家券功能，需要以下步骤:

1. 确定商家券的类型和规则：商家需要确定商家券的类型 (如折扣券、满减券、赠品券等) 和规则 (如满多少钱减多少钱、折扣力度等)。
2. 设计商家券的样式：商家需要设计商家券的样式，包括商家券的图片、文字、颜色等。
3. 开发商家券系统：商家需要开发商家券系统，包括商家券的发放、使用、核销等功能。
4. 集成支付系统：商家需要将商家券系统与支付系统集成，以便顾客在购买商品或服务时可以使用商家券。
5. 测试和上线：商家需要测试商家券系统，确保其正常运行，然后上线商家券功能。
   商家券接口一般由第三方支付平台或者电商平台提供，具体接口和 Demo 会因平台而异。以支付宝为例，提供了一个商家券接口的 Demo：
6. 请求接口：

https://openapi.alipay.com/gateway.do?method=alipay.trade.page.pay&notify_url=http%3A%2F%2Fdomain.com%2Fnotify_url.php&sign_type=RSA2&timestamp=2016-07-29+16%3A55%3A53&version=1.0&sign=cYmuUnKCkEh8YU94D3%2FZzHUdgN8yj0i%2FxdYk%2FfKo%3D
CopyCopy

1. 请求参数：

{
"app_id": "2014072300007148",
"biz_content": {
"timeout_express": "30m",
"product_code": "QUICK_MSECURITY_PAY",
"total_amount": "0.01",
"subject": "test",
"body": "test",
"out_trade_no": "IQJZSRC1YM",
"page_url": "https://domain.com/pay_page.php",
"notify_url": "http://domain.com/notify_url.php",
"trade_type": "APP",
"store_id": "2014072300007148",
"alipay_store_id": "2014072300007148",
"qr_code": "",
"qr_code_url": "",
"status": "待付款",
"promo_code": "testPromo",
"discount_amount": "0.005",
"discount_percentage": "5",
"limit_pay": "",
"full_amount_factor": "1",
"point_amount": "0",
"point_percentage": "0",
"trans_currency": "",
"trans_rate": "",
"insure_amount": "0",
"insure_rate": "0",
"logistics_type": "",
"logistics_fee": "0",
"logistics_rate": "0",
"memo": "",
"seller_id": "",
"seller_email": "",
"seller_phone": "",
"seller_name": "",
"buyer_id": "",
"buyer_email": "",
"buyer_phone": "",
"buyer_name": "",
"operator_id": "",
"operator_email": "",
"operator_phone": "",
"operator_name": "",
"extend_params": {
"is_total_discount": "true",
"total_discount_amount": "0.005",
"total_discount_percentage": "5",
"discount_items": [
{
"discount_id": "testPromo",
"discount_name": "testPromo",
"discount_amount": "0.005",
"discount_percentage": "5",
"discount_start_time": "",
"discount_end_time": "",
"discount_status": "有效"
}
]
}
},
"sign": "cYmuUnKCkEh8YU94D3%2FZzHUdgN8yj0i%2FxdYk%2FfKo%3D",
"timestamp": "2016-07-29 16:55:53"
}
CopyCopy

1. 响应参数：

{
"code": "10001",
"msg": "Success",
"sub_code": "",
"sub_msg": "",