主要调用的接口:<br />1.1 JSAPI/小小程序下单接口<br />接囗文档:<a href='https://pay.weixin.gg.com/doc/v3/merchant/4012791856' target='_blank'>https://pay.weixin.gg.com/doc/v3/merchant/4012791856</a><br />请求方式:POST /v3/pay/transactions/jsapi<br />清求域名:<a href='https://api.mch.weixin.qq.com' target='_blank'>https://api.mch.weixin.qq.com</a><br />1.2 小程序调起支付签名<br />接囗文档:<a href='https://pay.weixin.gq.com/doc/v3/merchant/4012365341' target='_blank'>https://pay.weixin.gq.com/doc/v3/merchant/4012365341</a><br />说明:前端调起支付时的签名规则<br /><br />{<br />  "微信支付V3_JSAPI下单接口调用记录": {<br />    "调用时间": "2025-09-22 09:23:56",<br />    "接口信息": {<br />      "接口文档": "<a href='https://pay.weixin.qq.com/doc/v3/merchant/4012791856"' target='_blank'>https://pay.weixin.qq.com/doc/v3/merchant/4012791856"</a>,<br />      "请求方式": "POST",<br />      "接口地址": "/v3/pay/transactions/jsapi",<br />      "完整URL": "<a href='https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi"' target='_blank'>https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi"</a><br />    },<br />    "请求信息": {<br />      "请求头": {<br />        "Authorization": "WECHATPAY2-SHA256-RSA2048 mchid=\"1727709366\",nonce_str=\"eMmlpYlrswO0uQVXJ3FzeLq2udhmQcZR\",signature=\"[RSA签名]\",timestamp=\"1758533036\",serial_no=\"2AEE80427CA051E94BDD72965C6D13EFAC796B94\"",<br />        "Accept": "application/json",<br />        "Content-Type": "application/json",<br />        "User-Agent": "WechatPayV3-Node/1.0.0"<br />      },<br />      "请求体": {<br />        "appid": "wx9f9c146ae1589404",<br />        "mchid": "1727709366",<br />        "description": "于群",<br />        "out_trade_no": "1758533036086E4FV3Y6B",<br />        "notify_url": "<a href='https://6sr8wc135175.vicp.fun/api/payment/notify"' target='_blank'>https://6sr8wc135175.vicp.fun/api/payment/notify"</a>,<br />        "amount": {<br />          "total": 1800,<br />          "currency": "CNY"<br />        },<br />        "payer": {<br />          "openid": "oQjw-14IB1OrkX6NWx5grRjUesAw"<br />        },<br />        "attach": "order_id:b0f9ab66-3828-4e78-a6a7-bad7b2f40936"<br />      }<br />    },