import (
    "fmt"

    "github.com/usalko/hexi"
    "github.com/usalko/hexi/ft"
)

func main() {
    fileType, err := hexi.DetectFileType([]byte{0x52, 0x41, 0x46, 0x36, 0x34})
    if err != nil {
        panic(err)
    }

    fmt.Printf("file type is %d", fileType)
    if *fileType == ft.RAF64 {
        fmt.Print("correct detection")
    }
}