core/types/derive_sha.go


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package types

import (
    "github.com/ethereum/go-ethereum/ethdb"
    "github.com/ethereum/go-ethereum/ethutil"
    "github.com/ethereum/go-ethereum/ptrie"
)

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

func DeriveSha(list DerivableList) []byte {
    db, _ := ethdb.NewMemDatabase()
    trie := ptrie.New(nil, db)
    for i := 0; i < list.Len(); i++ {
        trie.Update(ethutil.Encode(i), list.GetRlp(i))
    }

    return trie.Root()
}