Golang封装微信支付接口

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自己花了点时间把微信支付接口用golang封装了一下，以便以后需要接微信支付的时候可以直接拿来用。之前在网上看了很多写得NB微信SDK，自己也想尝试一下，于是做了api的简单封装。
TODO: 公众号开发api
地址: Github

package main

import (
    "fmt"
    dev "github.com/hong008/wechat-sdk"
)

func main() {
    var appId, mchId, apiKey, apiSecret string

    client := dev.NewPayer(dev.WithAppId(appId), dev.WithMchId(mchId), dev.WithApiKey(apiKey), dev.WithSecret(apiSecret))

    //unified order
    param := dev.NewParam()
    param.Add("nonce_str", "yourNonceStr")
    param.Add("body", "yourBody")
    param.Add("out_trade_no", "yourOutTradeNo")
    param.Add("total_fee", 1)
    param.Add("spbill_create_ip", "yourIp")
    param.Add("notify_url", "yourUrl")
    param.Add("trade_type", "JSAPI")
    result, err := client.UnifiedOrder(param)
    if err != nil {
        handleErr(err)
    }
    appId, _ := result.GetString("apppid")
    prepayId, _ := result.GetString("prepay_id")
    param = dev.NewParam()
    param.Add("appId", appId)
    param.Add("timeStamp", time.Now().Unix())
    param.Add("nonceStr", "nonceStr")
    param.Add("package", "prepay_id="+prepayId)
    param.Add("signType", "MD5")
    //use to evoke wechat pay 
    sign := param.Sign("MD5")


    //download bill
    param = dev.NewParam()
    param.Add("nonce_str", "yourNonceStr")
    param.Add("bill_date", "yourDate")
    param.Add("bill_type", "ALL")
    param.Add("tar_type", "GZIP")
    err := client.DownloadBill(param, "./bill")
    if err != nil {
        handleErr(err)
    }
    

    //get phone for mini program user
    result, err := client.GetUserPhoneForMini("code", "encryptedData", "iv")
    if err != nil {
        handleErr(err)
    }
    var phone string
    if countryCode := result.Get("countryCode"); countryCode != nil && countryCode.(string) == "86" {
        purePhone := result.Get("purePhoneNumber")
        phone = purePhone.(string)
    } else {
        phoneNumber := result.Get("phoneNumber")
        phone = phoneNumber.(string)
    }
    fmt.Printf("user phone is %s\n", phone)
}

package main

import (
    "fmt"
    "net/http"
    
    dev "github.com/hong008/wechat-sdk"
)

func main() {
    var appId, mchId, apiKey, apiSecret string

    client := dev.NewPayer(dev.WithAppId(appId), dev.WithMchId(mchId), dev.WithApiKey(apiKey), dev.WithSecret(apiSecret))

    //handle refund notify
    http.HandleFunc("/refund_notify", func(writer http.ResponseWriter, request *http.Request) {
        defer request.Body.Close()
        result, err := client.RefundNotify(request.Body)
        if err != nil {
            handleErr(err)
        }
        fmt.Printf("RefundNotify Result = %v\n", result.Data())
    })
    http.ListenAndServe(":8810", nil)
}

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