readJson

type State struct{
    round       []int
    p1val       []int
    p2val       []int
    decided     []int
    decision    []bool

}

func readJson(filename string) {
    var (
        idState map[string]interface{}
    )

    jsonFile, err := os.Open(filename)

    if err != nil {
        fmt.Print(err)
    }

    fmt.Println("Opened up the file")

    bytes, _ := ioutil.ReadAll(jsonFile)

    json.Unmarshal([]byte(bytes), &idState)

    for key, value := range idState{
        fmt.Println(key, value)
        break
    }

    var states State
    for _, value := range idState{
        err = mapstructure.Decode(value, states)
        break
    }
    fmt.Printf("%#v", states)
}