core/types/derive_sha.go


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package types

import (
    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/rlp"
    "github.com/ethereum/go-ethereum/trie"
)

type DerivableList interface {
    Len() int
    GetRlp(i int) []byte
}

func DeriveSha(list DerivableList) common.Hash {
    db, _ := ethdb.NewMemDatabase()
    trie := trie.New(nil, db)
    for i := 0; i < list.Len(); i++ {
        key, _ := rlp.EncodeToBytes(uint(i))
        trie.Update(key, list.GetRlp(i))
    }

    return common.BytesToHash(trie.Root())
}