certificates

package main

import (
	"context"
	"log"

	"gitee.com/eden-w2w/wechatpay-go/core"
	"gitee.com/eden-w2w/wechatpay-go/core/option"
	"gitee.com/eden-w2w/wechatpay-go/services/certificates"
	"gitee.com/eden-w2w/wechatpay-go/utils"
)

func main() {
	var (
		mchID                      string = "190000****"                               // 商户号
		mchCertificateSerialNumber string = "3775************************************" // 商户证书序列号
		mchAPIv3Key                string = "2ab9****************************"         // 商户APIv3密钥
	)

	// 使用 utils 提供的函数从本地文件中加载商户私钥，商户私钥会用来生成请求的签名
	mchPrivateKey, err := utils.LoadPrivateKeyWithPath("/path/to/merchant/apiclient_key.pem")
	if err != nil {
		log.Print("load merchant private key error")
	}

	ctx := context.Background()
	// 使用商户私钥等初始化 client，并使它具有自动定时获取微信支付平台证书的能力
	opts := []core.ClientOption{
		option.WithWechatPayAutoAuthCipher(mchID, mchCertificateSerialNumber, mchPrivateKey, mchAPIv3Key),
	}
	client, err := core.NewClient(ctx, opts...)
	if err != nil {
		log.Printf("new wechat pay client err:%s", err)
	}

	svc := certificates.CertificatesApiService{Client: client}
	resp, result, err := svc.DownloadCertificates(ctx)

	if err != nil {
		// 处理错误
		log.Printf("call DownloadCertificates err:%s", err)
	} else {
		// 处理返回结果
		log.Printf("status=%d resp=%s", result.Response.StatusCode, resp)
	}
}