# 微信 JSAPI 支付
> 在使用 JSAPI支付之前，请先[获得用户openid](/api/huo-qu-yong-hu-openid.md)
#### 请求URL
* `https://newapi.mbd.pub/release/wx`
#### 请求方式
* POST
* Json
#### 请求参数
| **参数名** | **必选** | **类型** | **说明** |
| -------------- | ------ | ------ | -------------------------------------------------------------------------------------------------------------------------------- |
| openid | 是 | string | 用户的openid，参见[获取openid](/api/huo-qu-yong-hu-openid.md) |
| app\_id | 是 | string | 你的 app\_id，可在控制台查看 |
| share\_code | 否 | string | 分账参数，需先[开通分账权限](/kai-fa-zhe-zhi-chi/ying-yong-he-zuo-fen-zhang-quan-xian.md#shen-qing-fen-zhang-quan-xian-de-qian-zhi-tiao-jian) |
| description | 是 | string | 支付描述，一般为商品名称 |
| amount\_total | 是 | number | 金额，**单位为分** |
| out\_trade\_no | 否 | string | 订单号，如不填，面包多将随机生成订单号 |
| callback\_url | 是 | string | 支付后跳转地址 |
| sign | 是 | string | 请求签名，参照[签名算法](/api/qian-ming-suan-fa.md) |
#### 返回示例
```
//成功
{
"appId": "wxa8423199a021d",
"timeStamp": "1615441885",
"nonceStr": "ulAuiq1uxxofwSCH",
"package": "prepay_id=wx111351262666123e13b9da0000",
"signType": "RSA",
"paySign": "4QaU1C1HvjBdTTgsjwP48YWC+OlHtqWOXWPGD3hEt27S3Snha7iDjwBPOSMLOueTIxi0TAaAaeZy0QU7RU065XwlNxTH9NDP9oN+mXyy+S6bgmNHKyxHyISVeo1gCZhFKCidpaj2KgUHgfyyvYcte5oeK3jtYccAyFyJ23IugvYSggxUKM6JQKIsJ9YWAWIBqL9q9FINbKl0bjOAMYC0IAmmw8whaLC7ZdFZ9wIsHE6YYuXwnDi/O6tRpIdZf/y3w=="
}
//失败
{
"error": "error sign"
}
```
#### 返回参数说明
| **参数名** | **类型** | **说明** |
| ------- | ------ | ------ |
| error | string | 错误说明 |
| | | |
#### 备注
* 如果返回结果不包含 error，则请求成功，返回的参数直接放入html中，即可在微信内使用微信 jsapi 唤起支付
* jsapi支付的使用请参考微信官方文档
* 根据微信规则，jsapi 支付后用户会进入「小票页面」，用户点击该页面的「继续」按钮，会跳转至 `callback_url`
#### 支付Demo
> 该 demo 参考 payjs
```
微信支付
```
---
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