github.com/phillinzzz/newBsc@v1.1.6/core/state/sync.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package state
    18  
    19  import (
    20  	"bytes"
    21  
    22  	"github.com/phillinzzz/newBsc/common"
    23  	"github.com/phillinzzz/newBsc/ethdb"
    24  	"github.com/phillinzzz/newBsc/rlp"
    25  	"github.com/phillinzzz/newBsc/trie"
    26  )
    27  
    28  // NewStateSync create a new state trie download scheduler.
    29  func NewStateSync(root common.Hash, database ethdb.KeyValueReader, bloom *trie.SyncBloom, onLeaf func(paths [][]byte, leaf []byte) error) *trie.Sync {
    30  	// Register the storage slot callback if the external callback is specified.
    31  	var onSlot func(paths [][]byte, hexpath []byte, leaf []byte, parent common.Hash) error
    32  	if onLeaf != nil {
    33  		onSlot = func(paths [][]byte, hexpath []byte, leaf []byte, parent common.Hash) error {
    34  			return onLeaf(paths, leaf)
    35  		}
    36  	}
    37  	// Register the account callback to connect the state trie and the storage
    38  	// trie belongs to the contract.
    39  	var syncer *trie.Sync
    40  	onAccount := func(paths [][]byte, hexpath []byte, leaf []byte, parent common.Hash) error {
    41  		if onLeaf != nil {
    42  			if err := onLeaf(paths, leaf); err != nil {
    43  				return err
    44  			}
    45  		}
    46  		var obj Account
    47  		if err := rlp.Decode(bytes.NewReader(leaf), &obj); err != nil {
    48  			return err
    49  		}
    50  		syncer.AddSubTrie(obj.Root, hexpath, parent, onSlot)
    51  		syncer.AddCodeEntry(common.BytesToHash(obj.CodeHash), hexpath, parent)
    52  		return nil
    53  	}
    54  	syncer = trie.NewSync(root, database, onAccount, bloom)
    55  	return syncer
    56  }