horrible.go

package main

import 	"github.com/ethereum/go-ethereum/common"

func main() {
	hashes := []common.Hash{{1}, {2}, {3}}

	ss := convertDirectly(hashes)
	checkResult("direct", ss)

	ss = convertIndirectly(hashes)
	checkResult("indirect", ss)
}

func convertDirectly(hashes []common.Hash) (ss [][]byte) {
	for _, hash := range hashes {
		ss = append(ss, hash[:])
	}
	return
}

func convertIndirectly(hashes []common.Hash) (ss [][]byte) {
	for _, hash := range hashes {
		ss = append(ss, hash.Bytes())
	}
	return
}

func checkResult(title string, ss [][]byte) {
	println(title)
	for _, s := range ss {
		println(s[0])
	}
}