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60 lines
1.9 KiB
60 lines
1.9 KiB
// Copyright 2024 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package stateless
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import (
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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)
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// MakeHashDB imports tries, codes and block hashes from a witness into a new
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// hash-based memory db. We could eventually rewrite this into a pathdb, but
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// simple is better for now.
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func (w *Witness) MakeHashDB() ethdb.Database {
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var (
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memdb = rawdb.NewMemoryDatabase()
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hasher = crypto.NewKeccakState()
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hash = make([]byte, 32)
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)
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// Inject all the "block hashes" (i.e. headers) into the ephemeral database
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for _, header := range w.Headers {
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rawdb.WriteHeader(memdb, header)
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}
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// Inject all the bytecodes into the ephemeral database
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for code := range w.Codes {
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blob := []byte(code)
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hasher.Reset()
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hasher.Write(blob)
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hasher.Read(hash)
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rawdb.WriteCode(memdb, common.BytesToHash(hash), blob)
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}
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// Inject all the MPT trie nodes into the ephemeral database
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for node := range w.State {
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blob := []byte(node)
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hasher.Reset()
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hasher.Write(blob)
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hasher.Read(hash)
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rawdb.WriteLegacyTrieNode(memdb, common.BytesToHash(hash), blob)
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}
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return memdb
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}
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