feat:增加余额支付功能

src/service/api/payment.ts

@@ -25,4 +25,15 @@ export function wxPayScanCode(params: {orderId: number}) {
     method: 'post',
     params
   });
-}
+}
+
+/** Balance pay with orderId */
+export function payBalance(params: { orderId: string }) {
+  return request({
+    url: `/u/order/payBalance/${params.orderId}`,
+    method: 'post',
+    headers: {
+      'Content-Type': 'application/json'
+    }
+  });
+}