package hash

import (
	"encoding/binary"
	"encoding/hex"

	"golang.org/x/crypto/scrypt"
)

func HashCardUid(card uint64) string {
	b := make([]byte, 8)
	binary.LittleEndian.PutUint64(b, card)

	hashed, err := scrypt.Key(b, []byte("hkRXwLlQKmCJoy5qaahp"), 16384, 8, 1, 64)
	if err != nil {
		panic(err) // can only happen when scrypt params are garbage
	}

	hashedHex := hex.EncodeToString(hashed)
	return hashedHex
}