MySQL UUID_TO_BIN and BIN_TO_UUID implementation in Go

my_uuid.go

package main

import (
	"fmt"

	"github.com/google/uuid"
)

func main() {
	var id = "299feb0f-ba8d-11eb-9453-0242ac130003"

	u, err := uuid.Parse(id)
	if err != nil {
		panic(err)
	}

	fmt.Printf("   original: %v\n", [16]byte(u))
	bin := uuidToBin(u)
	fmt.Printf("uuid_to_bin: %v\n", bin)
	fmt.Printf("bin_to_uuid: %v\n", binToUuid(bin))
}

func uuidToBin(u uuid.UUID) []byte {
	var b = make([]byte, 16)

	copy(b[0:], u[6:8])
	copy(b[2:], u[4:6])
	copy(b[4:], u[:4])
	copy(b[8:], u[8:])

	return b
}

func binToUuid(b []byte) uuid.UUID {
	var u uuid.UUID

	copy(u[0:], b[4:8])
	copy(u[4:], b[2:4])
	copy(u[6:], b[:2])
	copy(u[8:], b[8:])

	return u
}