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72 lines
2.4 KiB
Go
72 lines
2.4 KiB
Go
// 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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"math/big"
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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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// StateSync is the main state synchronisation scheduler, which provides yet the
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// unknown state hashes to retrieve, accepts node data associated with said hashes
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// and reconstructs the state database step by step until all is done.
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type StateSync trie.TrieSync
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// NewStateSync create a new state trie download scheduler.
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func NewStateSync(root common.Hash, database ethdb.Database) *StateSync {
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// Pre-declare the result syncer t
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var syncer *trie.TrieSync
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callback := func(leaf []byte, parent common.Hash) error {
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var obj struct {
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Nonce uint64
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Balance *big.Int
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Root common.Hash
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CodeHash []byte
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}
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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, 64, parent, nil)
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syncer.AddRawEntry(common.BytesToHash(obj.CodeHash), 64, parent)
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return nil
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}
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syncer = trie.NewTrieSync(root, database, callback)
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return (*StateSync)(syncer)
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}
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// Missing retrieves the known missing nodes from the state trie for retrieval.
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func (s *StateSync) Missing(max int) []common.Hash {
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return (*trie.TrieSync)(s).Missing(max)
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}
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// Process injects a batch of retrieved trie nodes data.
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func (s *StateSync) Process(list []trie.SyncResult) (int, error) {
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return (*trie.TrieSync)(s).Process(list)
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}
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// Pending returns the number of state entries currently pending for download.
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func (s *StateSync) Pending() int {
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return (*trie.TrieSync)(s).Pending()
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}
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