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57 lines
2.2 KiB
57 lines
2.2 KiB
2 years ago
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// Copyright 2015 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 state
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import (
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"bytes"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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)
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// NewStateSync create a new state trie download scheduler.
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func NewStateSync(root common.Hash, database ethdb.KeyValueReader, onLeaf func(keys [][]byte, leaf []byte) error, scheme string) *trie.Sync {
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// Register the storage slot callback if the external callback is specified.
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var onSlot func(keys [][]byte, path []byte, leaf []byte, parent common.Hash, parentPath []byte) error
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if onLeaf != nil {
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onSlot = func(keys [][]byte, path []byte, leaf []byte, parent common.Hash, parentPath []byte) error {
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return onLeaf(keys, leaf)
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}
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}
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// Register the account callback to connect the state trie and the storage
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// trie belongs to the contract.
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var syncer *trie.Sync
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onAccount := func(keys [][]byte, path []byte, leaf []byte, parent common.Hash, parentPath []byte) error {
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if onLeaf != nil {
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if err := onLeaf(keys, leaf); err != nil {
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return err
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}
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}
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var obj Account
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if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
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return err
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}
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syncer.AddSubTrie(obj.Root, path, parent, parentPath, onSlot)
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syncer.AddCodeEntry(common.BytesToHash(obj.CodeHash), path, parent, parentPath)
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return nil
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}
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syncer = trie.NewSync(root, database, onAccount, scheme)
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return syncer
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}
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