Nice way of obfuscating database ids https://go.dev/play/p/4t9Ej8xOG5C

id_obfuscate.go

package main

import (
	"bytes"
	"encoding/base32"
	"encoding/binary"
	"fmt"
	"io"
)

func main() {
	const key = Key(1528132745924452051)

	src := uint64(69420)

	buf := bytes.NewBuffer(nil)
	if err := key.Encode(src, buf); err != nil {
		panic(err)
	}

	dst, err := key.Decode(buf)
	if err != nil {
		panic(err)
	}

	fmt.Printf("src = %v\ndst = %v\n", src, dst)
}

type Key uint64

func (k Key) Encode(v uint64, w io.Writer) error {
	encoder := base32.NewEncoder(base32.StdEncoding, w)
	if err := binary.Write(encoder, binary.LittleEndian, v^uint64(k)); err != nil {
		return err
	}
	return encoder.Close()
}

func (k Key) Decode(r io.Reader) (uint64, error) {
	var idEncrypted uint64
	if err := binary.Read(base32.NewDecoder(base32.StdEncoding, r), binary.LittleEndian, &idEncrypted); err != nil {
		return 0, err
	}
	return uint64(k) ^ idEncrypted, nil
}