func getLatestTxs() map[string]interface{}{} {
    fmt.Println("hello")
    resp, err := http.Get("http://api.etherscan.io/api?module=account&action=txlist&address=0x266ac31358d773af8278f625c4d4a35648953341&startblock=0&endblock=99999999&sort=asc&apikey=5UUVIZV5581ENPXKYWAUDGQTHI956A56MU")
    defer resp.Body.Close()
    body, _ := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Errorf("etherscan访问失败")
    }
    ret := map[string]interface{}{}
    json.Unmarshal(body, &ret)
    if ret["status"] == 1 {
        return ret["result"]
    }
}