func (s *ObjectService) PostRestore(ctx context.Context, key string, opt *ObjectRestoreOptions) (*Response, error) 

package main                                                                                                                                                                                   

import (
    "context"
    "github.com/tencentyun/cos-go-sdk-v5"
    "net/http"
    "net/url"
    "os"
)

func main() {
    // Bucket name, composed of bucketname-appid, appid is required. The bucket name can be viewed in the COS console: https://console.cloud.tencent.com/cos5/bucket
    // Replace with the user's region. The bucket region can be viewed in the COS console "Bucket Overview" at https://console.cloud.tencent.com/. For more information about regions, visit https://cloud.tencent.com/document/product/436/6224.
    u, _ := url.Parse("https://examplebucket-1250000000.cos.ap-guangzhou.myqcloud.com")
    b := &cos.BaseURL{BucketURL: u}
    client := cos.NewClient(b, &http.Client{
        Transport: &cos.AuthorizationTransport{
            // Get the key from environment variables
            // Environment variable SECRETID represents the user's SecretId. To view the key, log in to the Access Management Console at https://console.cloud.tencent.com/cam/capi.
            SecretID: os.Getenv("SECRETID"),  // User's SecretId, it is recommended to use a sub-account key, following the principle of least privilege to reduce usage risks. For obtaining a sub-account key, please refer to https://cloud.tencent.com/document/product/598/37140
            // The environment variable SECRETKEY represents the user's SecretKey. To view the key, log in to the CAM console at https://console.cloud.tencent.com/cam/capi.
            SecretKey: os.Getenv("SECRETKEY"),  // User's SecretKey, it is recommended to use a sub-account key, following the principle of least privilege to reduce usage risks. For obtaining a sub-account key, please refer to https://cloud.tencent.com/document/product/598/37140
        },
    })
    key := "example_restore"
    f, err := os.Open("/test")
    if err != nil {
        panic(err)
}
    opt := &cos.ObjectPutOptions{
        ObjectPutHeaderOptions: &cos.ObjectPutHeaderOptions{
            ContentType:      "text/html",
            XCosStorageClass: "ARCHIVE", // Archive type
        },
        ACLHeaderOptions: &cos.ACLHeaderOptions{
            // It is recommended not to set permissions for individual files during upload unless necessary, to avoid reaching the limit. If not set, the file will inherit the bucket's permissions by default.
            XCosACL: "private",
        },
}
    // Direct archive upload
    _, err = client.Object.Put(context.Background(), key, f, opt)
    if err != nil {
        panic(err)
}

    opts := &cos.ObjectRestoreOptions{
        Days: 2,
        Tier: &cos.CASJobParameters{
            // Standard, Expedited and Bulk
            Tier: "Expedited",
        },
}
    // Archive restoration
    _, err = client.Object.PostRestore(context.Background(), key, opts)
    if err != nil {
        panic(err)
}
}

type ObjectRestoreOptions struct {        
    Days    int               
    Tier    *CASJobParameters 
}
type CASJobParameters struct {
    Tier    string 
}