package main

    import (
        "encoding/json"
        "fmt"
        "github.com/uSpeedo/usms-sdk-go/private/utils"
        "time"

        "github.com/uSpeedo/usms-sdk-go/services/usms"
        "github.com/uSpeedo/usms-sdk-go/um"
        "github.com/uSpeedo/usms-sdk-go/um/auth"
        "github.com/uSpeedo/usms-sdk-go/um/config"
        "github.com/uSpeedo/usms-sdk-go/um/log"
    )

    func main() {
        cfg := config.NewConfig()
        cfg.LogLevel = log.DebugLevel

        credential := auth.NewCredential()
        credential.AccessKeyId = "..."
        credential.AccessKeySecret = "..."

        client := usms.NewClient(&cfg, &credential)
        // send request
        req := client.NewSendBatchUSMSMessageRequest()
        req.AccountId = um.Int(0)
        req.Action = um.String("SendBatchUSMSMessage")
        req.TaskContent = []usms.SendBatchInfo{
            {
                TemplateId: "...",
                SenderId:   "",
                Target: []usms.SendBatchTarget{
                    {
                        Phone: "130xxxx1321",
                    },
                    {
                        Phone: "130xxxx1321",
                    },
                },
            },
        }
        //add header
        req.SetNonce(utils.RandStr(10))
        req.SetAccessKeyId(credential.AccessKeyId)
        req.SetSignature(credential.CreateSign(JSONMethod(req)))
        t, _ := time.ParseDuration("-2m")
        req.SetTimestamp(time.Now().Add(t).Unix())
        resp, err := client.SendBatchUSMSMessage(req)
        if err != nil {
            panic(err)
        }
        fmt.Printf("%+v", resp)
    }

    func JSONMethod(content interface{}) map[string]interface{} {
        data, _ := json.Marshal(&content)
        m := make(map[string]interface{})
        _ = json.Unmarshal(data, &m)
        return m
    }