package main

import (
	"crypto/sha512"
	"encoding/binary"
	"fmt"
	"strconv"
)

func Sauce(malid int64, username string) string {
	return fmt.Sprintf("%x", sha512.Sum512([]byte(registerSecret+strconv.FormatInt(malid, 10)+username)))
}

func BytesToInt64(bytes []byte) (int64, error) {
	yes, c := binary.Varint(bytes)
	if c <= 0 {
		return yes, fmt.Errorf("int64 decode error: %s", bytes)
	}
	return yes, nil
}

func Int64ToByte(yes int64) []byte {
	buf := make([]byte, binary.MaxVarintLen64)
	n := binary.PutVarint(buf, yes)
	return buf[:n]
}