66f0c464cc
receipts may be null for very short time in some condition. For this case, we should not add the null value into cache. Because you will not get the right result if you keep requesting that receipt.
1703 lines
62 KiB
Go
1703 lines
62 KiB
Go
// Copyright 2014 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 core implements the Ethereum consensus protocol.
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package core
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import (
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"errors"
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"fmt"
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"io"
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"math/big"
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mrand "math/rand"
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"sync"
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"sync/atomic"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/common/prque"
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"github.com/ethereum/go-ethereum/consensus"
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"github.com/ethereum/go-ethereum/core/rawdb"
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"github.com/ethereum/go-ethereum/core/state"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/ethdb"
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"github.com/ethereum/go-ethereum/event"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/metrics"
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"github.com/ethereum/go-ethereum/params"
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"github.com/ethereum/go-ethereum/rlp"
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"github.com/ethereum/go-ethereum/trie"
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"github.com/hashicorp/golang-lru"
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)
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var (
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blockInsertTimer = metrics.NewRegisteredTimer("chain/inserts", nil)
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blockValidationTimer = metrics.NewRegisteredTimer("chain/validation", nil)
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blockExecutionTimer = metrics.NewRegisteredTimer("chain/execution", nil)
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blockWriteTimer = metrics.NewRegisteredTimer("chain/write", nil)
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ErrNoGenesis = errors.New("Genesis not found in chain")
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)
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const (
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bodyCacheLimit = 256
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blockCacheLimit = 256
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receiptsCacheLimit = 32
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maxFutureBlocks = 256
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maxTimeFutureBlocks = 30
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badBlockLimit = 10
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triesInMemory = 128
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// BlockChainVersion ensures that an incompatible database forces a resync from scratch.
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BlockChainVersion uint64 = 3
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)
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// CacheConfig contains the configuration values for the trie caching/pruning
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// that's resident in a blockchain.
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type CacheConfig struct {
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Disabled bool // Whether to disable trie write caching (archive node)
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TrieCleanLimit int // Memory allowance (MB) to use for caching trie nodes in memory
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TrieDirtyLimit int // Memory limit (MB) at which to start flushing dirty trie nodes to disk
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TrieTimeLimit time.Duration // Time limit after which to flush the current in-memory trie to disk
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}
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// BlockChain represents the canonical chain given a database with a genesis
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// block. The Blockchain manages chain imports, reverts, chain reorganisations.
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//
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// Importing blocks in to the block chain happens according to the set of rules
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// defined by the two stage Validator. Processing of blocks is done using the
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// Processor which processes the included transaction. The validation of the state
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// is done in the second part of the Validator. Failing results in aborting of
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// the import.
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//
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// The BlockChain also helps in returning blocks from **any** chain included
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// in the database as well as blocks that represents the canonical chain. It's
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// important to note that GetBlock can return any block and does not need to be
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// included in the canonical one where as GetBlockByNumber always represents the
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// canonical chain.
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type BlockChain struct {
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chainConfig *params.ChainConfig // Chain & network configuration
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cacheConfig *CacheConfig // Cache configuration for pruning
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db ethdb.Database // Low level persistent database to store final content in
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triegc *prque.Prque // Priority queue mapping block numbers to tries to gc
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gcproc time.Duration // Accumulates canonical block processing for trie dumping
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hc *HeaderChain
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rmLogsFeed event.Feed
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chainFeed event.Feed
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chainSideFeed event.Feed
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chainHeadFeed event.Feed
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logsFeed event.Feed
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scope event.SubscriptionScope
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genesisBlock *types.Block
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chainmu sync.RWMutex // blockchain insertion lock
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procmu sync.RWMutex // block processor lock
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checkpoint int // checkpoint counts towards the new checkpoint
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currentBlock atomic.Value // Current head of the block chain
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currentFastBlock atomic.Value // Current head of the fast-sync chain (may be above the block chain!)
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stateCache state.Database // State database to reuse between imports (contains state cache)
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bodyCache *lru.Cache // Cache for the most recent block bodies
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bodyRLPCache *lru.Cache // Cache for the most recent block bodies in RLP encoded format
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receiptsCache *lru.Cache // Cache for the most recent receipts per block
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blockCache *lru.Cache // Cache for the most recent entire blocks
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futureBlocks *lru.Cache // future blocks are blocks added for later processing
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quit chan struct{} // blockchain quit channel
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running int32 // running must be called atomically
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// procInterrupt must be atomically called
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procInterrupt int32 // interrupt signaler for block processing
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wg sync.WaitGroup // chain processing wait group for shutting down
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engine consensus.Engine
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processor Processor // block processor interface
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validator Validator // block and state validator interface
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vmConfig vm.Config
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badBlocks *lru.Cache // Bad block cache
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shouldPreserve func(*types.Block) bool // Function used to determine whether should preserve the given block.
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}
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// NewBlockChain returns a fully initialised block chain using information
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// available in the database. It initialises the default Ethereum Validator and
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// Processor.
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func NewBlockChain(db ethdb.Database, cacheConfig *CacheConfig, chainConfig *params.ChainConfig, engine consensus.Engine, vmConfig vm.Config, shouldPreserve func(block *types.Block) bool) (*BlockChain, error) {
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if cacheConfig == nil {
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cacheConfig = &CacheConfig{
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TrieCleanLimit: 256,
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TrieDirtyLimit: 256,
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TrieTimeLimit: 5 * time.Minute,
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}
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}
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bodyCache, _ := lru.New(bodyCacheLimit)
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bodyRLPCache, _ := lru.New(bodyCacheLimit)
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receiptsCache, _ := lru.New(receiptsCacheLimit)
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blockCache, _ := lru.New(blockCacheLimit)
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futureBlocks, _ := lru.New(maxFutureBlocks)
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badBlocks, _ := lru.New(badBlockLimit)
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bc := &BlockChain{
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chainConfig: chainConfig,
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cacheConfig: cacheConfig,
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db: db,
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triegc: prque.New(nil),
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stateCache: state.NewDatabaseWithCache(db, cacheConfig.TrieCleanLimit),
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quit: make(chan struct{}),
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shouldPreserve: shouldPreserve,
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bodyCache: bodyCache,
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bodyRLPCache: bodyRLPCache,
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receiptsCache: receiptsCache,
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blockCache: blockCache,
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futureBlocks: futureBlocks,
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engine: engine,
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vmConfig: vmConfig,
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badBlocks: badBlocks,
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}
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bc.SetValidator(NewBlockValidator(chainConfig, bc, engine))
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bc.SetProcessor(NewStateProcessor(chainConfig, bc, engine))
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var err error
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bc.hc, err = NewHeaderChain(db, chainConfig, engine, bc.getProcInterrupt)
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if err != nil {
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return nil, err
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}
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bc.genesisBlock = bc.GetBlockByNumber(0)
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if bc.genesisBlock == nil {
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return nil, ErrNoGenesis
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}
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if err := bc.loadLastState(); err != nil {
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return nil, err
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}
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// Check the current state of the block hashes and make sure that we do not have any of the bad blocks in our chain
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for hash := range BadHashes {
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if header := bc.GetHeaderByHash(hash); header != nil {
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// get the canonical block corresponding to the offending header's number
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headerByNumber := bc.GetHeaderByNumber(header.Number.Uint64())
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// make sure the headerByNumber (if present) is in our current canonical chain
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if headerByNumber != nil && headerByNumber.Hash() == header.Hash() {
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log.Error("Found bad hash, rewinding chain", "number", header.Number, "hash", header.ParentHash)
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bc.SetHead(header.Number.Uint64() - 1)
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log.Error("Chain rewind was successful, resuming normal operation")
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}
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}
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}
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// Take ownership of this particular state
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go bc.update()
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return bc, nil
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}
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func (bc *BlockChain) getProcInterrupt() bool {
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return atomic.LoadInt32(&bc.procInterrupt) == 1
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}
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// GetVMConfig returns the block chain VM config.
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func (bc *BlockChain) GetVMConfig() *vm.Config {
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return &bc.vmConfig
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}
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// loadLastState loads the last known chain state from the database. This method
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// assumes that the chain manager mutex is held.
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func (bc *BlockChain) loadLastState() error {
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// Restore the last known head block
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head := rawdb.ReadHeadBlockHash(bc.db)
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if head == (common.Hash{}) {
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// Corrupt or empty database, init from scratch
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log.Warn("Empty database, resetting chain")
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return bc.Reset()
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}
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// Make sure the entire head block is available
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currentBlock := bc.GetBlockByHash(head)
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if currentBlock == nil {
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// Corrupt or empty database, init from scratch
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log.Warn("Head block missing, resetting chain", "hash", head)
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return bc.Reset()
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}
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// Make sure the state associated with the block is available
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if _, err := state.New(currentBlock.Root(), bc.stateCache); err != nil {
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// Dangling block without a state associated, init from scratch
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log.Warn("Head state missing, repairing chain", "number", currentBlock.Number(), "hash", currentBlock.Hash())
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if err := bc.repair(¤tBlock); err != nil {
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return err
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}
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}
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// Everything seems to be fine, set as the head block
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bc.currentBlock.Store(currentBlock)
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// Restore the last known head header
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currentHeader := currentBlock.Header()
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if head := rawdb.ReadHeadHeaderHash(bc.db); head != (common.Hash{}) {
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if header := bc.GetHeaderByHash(head); header != nil {
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currentHeader = header
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}
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}
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bc.hc.SetCurrentHeader(currentHeader)
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// Restore the last known head fast block
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bc.currentFastBlock.Store(currentBlock)
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if head := rawdb.ReadHeadFastBlockHash(bc.db); head != (common.Hash{}) {
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if block := bc.GetBlockByHash(head); block != nil {
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bc.currentFastBlock.Store(block)
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}
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}
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// Issue a status log for the user
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currentFastBlock := bc.CurrentFastBlock()
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headerTd := bc.GetTd(currentHeader.Hash(), currentHeader.Number.Uint64())
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blockTd := bc.GetTd(currentBlock.Hash(), currentBlock.NumberU64())
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fastTd := bc.GetTd(currentFastBlock.Hash(), currentFastBlock.NumberU64())
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log.Info("Loaded most recent local header", "number", currentHeader.Number, "hash", currentHeader.Hash(), "td", headerTd, "age", common.PrettyAge(time.Unix(currentHeader.Time.Int64(), 0)))
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log.Info("Loaded most recent local full block", "number", currentBlock.Number(), "hash", currentBlock.Hash(), "td", blockTd, "age", common.PrettyAge(time.Unix(currentBlock.Time().Int64(), 0)))
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log.Info("Loaded most recent local fast block", "number", currentFastBlock.Number(), "hash", currentFastBlock.Hash(), "td", fastTd, "age", common.PrettyAge(time.Unix(currentFastBlock.Time().Int64(), 0)))
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return nil
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}
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// SetHead rewinds the local chain to a new head. In the case of headers, everything
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// above the new head will be deleted and the new one set. In the case of blocks
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// though, the head may be further rewound if block bodies are missing (non-archive
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// nodes after a fast sync).
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func (bc *BlockChain) SetHead(head uint64) error {
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log.Warn("Rewinding blockchain", "target", head)
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bc.chainmu.Lock()
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defer bc.chainmu.Unlock()
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// Rewind the header chain, deleting all block bodies until then
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delFn := func(db rawdb.DatabaseDeleter, hash common.Hash, num uint64) {
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rawdb.DeleteBody(db, hash, num)
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}
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bc.hc.SetHead(head, delFn)
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currentHeader := bc.hc.CurrentHeader()
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// Clear out any stale content from the caches
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bc.bodyCache.Purge()
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bc.bodyRLPCache.Purge()
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bc.receiptsCache.Purge()
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bc.blockCache.Purge()
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bc.futureBlocks.Purge()
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// Rewind the block chain, ensuring we don't end up with a stateless head block
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if currentBlock := bc.CurrentBlock(); currentBlock != nil && currentHeader.Number.Uint64() < currentBlock.NumberU64() {
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bc.currentBlock.Store(bc.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64()))
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}
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if currentBlock := bc.CurrentBlock(); currentBlock != nil {
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if _, err := state.New(currentBlock.Root(), bc.stateCache); err != nil {
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// Rewound state missing, rolled back to before pivot, reset to genesis
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bc.currentBlock.Store(bc.genesisBlock)
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}
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}
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// Rewind the fast block in a simpleton way to the target head
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if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock != nil && currentHeader.Number.Uint64() < currentFastBlock.NumberU64() {
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bc.currentFastBlock.Store(bc.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64()))
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}
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// If either blocks reached nil, reset to the genesis state
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if currentBlock := bc.CurrentBlock(); currentBlock == nil {
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bc.currentBlock.Store(bc.genesisBlock)
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}
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if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock == nil {
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bc.currentFastBlock.Store(bc.genesisBlock)
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}
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currentBlock := bc.CurrentBlock()
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currentFastBlock := bc.CurrentFastBlock()
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rawdb.WriteHeadBlockHash(bc.db, currentBlock.Hash())
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rawdb.WriteHeadFastBlockHash(bc.db, currentFastBlock.Hash())
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return bc.loadLastState()
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}
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// FastSyncCommitHead sets the current head block to the one defined by the hash
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// irrelevant what the chain contents were prior.
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func (bc *BlockChain) FastSyncCommitHead(hash common.Hash) error {
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// Make sure that both the block as well at its state trie exists
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block := bc.GetBlockByHash(hash)
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if block == nil {
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return fmt.Errorf("non existent block [%x…]", hash[:4])
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}
|
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if _, err := trie.NewSecure(block.Root(), bc.stateCache.TrieDB(), 0); err != nil {
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return err
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}
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// If all checks out, manually set the head block
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bc.chainmu.Lock()
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bc.currentBlock.Store(block)
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bc.chainmu.Unlock()
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log.Info("Committed new head block", "number", block.Number(), "hash", hash)
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return nil
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}
|
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|
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// GasLimit returns the gas limit of the current HEAD block.
|
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func (bc *BlockChain) GasLimit() uint64 {
|
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return bc.CurrentBlock().GasLimit()
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}
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|
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// CurrentBlock retrieves the current head block of the canonical chain. The
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// block is retrieved from the blockchain's internal cache.
|
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func (bc *BlockChain) CurrentBlock() *types.Block {
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return bc.currentBlock.Load().(*types.Block)
|
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}
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|
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// CurrentFastBlock retrieves the current fast-sync head block of the canonical
|
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// chain. The block is retrieved from the blockchain's internal cache.
|
|
func (bc *BlockChain) CurrentFastBlock() *types.Block {
|
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return bc.currentFastBlock.Load().(*types.Block)
|
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}
|
|
|
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// SetProcessor sets the processor required for making state modifications.
|
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func (bc *BlockChain) SetProcessor(processor Processor) {
|
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bc.procmu.Lock()
|
|
defer bc.procmu.Unlock()
|
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bc.processor = processor
|
|
}
|
|
|
|
// SetValidator sets the validator which is used to validate incoming blocks.
|
|
func (bc *BlockChain) SetValidator(validator Validator) {
|
|
bc.procmu.Lock()
|
|
defer bc.procmu.Unlock()
|
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bc.validator = validator
|
|
}
|
|
|
|
// Validator returns the current validator.
|
|
func (bc *BlockChain) Validator() Validator {
|
|
bc.procmu.RLock()
|
|
defer bc.procmu.RUnlock()
|
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return bc.validator
|
|
}
|
|
|
|
// Processor returns the current processor.
|
|
func (bc *BlockChain) Processor() Processor {
|
|
bc.procmu.RLock()
|
|
defer bc.procmu.RUnlock()
|
|
return bc.processor
|
|
}
|
|
|
|
// State returns a new mutable state based on the current HEAD block.
|
|
func (bc *BlockChain) State() (*state.StateDB, error) {
|
|
return bc.StateAt(bc.CurrentBlock().Root())
|
|
}
|
|
|
|
// StateAt returns a new mutable state based on a particular point in time.
|
|
func (bc *BlockChain) StateAt(root common.Hash) (*state.StateDB, error) {
|
|
return state.New(root, bc.stateCache)
|
|
}
|
|
|
|
// StateCache returns the caching database underpinning the blockchain instance.
|
|
func (bc *BlockChain) StateCache() state.Database {
|
|
return bc.stateCache
|
|
}
|
|
|
|
// Reset purges the entire blockchain, restoring it to its genesis state.
|
|
func (bc *BlockChain) Reset() error {
|
|
return bc.ResetWithGenesisBlock(bc.genesisBlock)
|
|
}
|
|
|
|
// ResetWithGenesisBlock purges the entire blockchain, restoring it to the
|
|
// specified genesis state.
|
|
func (bc *BlockChain) ResetWithGenesisBlock(genesis *types.Block) error {
|
|
// Dump the entire block chain and purge the caches
|
|
if err := bc.SetHead(0); err != nil {
|
|
return err
|
|
}
|
|
bc.chainmu.Lock()
|
|
defer bc.chainmu.Unlock()
|
|
|
|
// Prepare the genesis block and reinitialise the chain
|
|
if err := bc.hc.WriteTd(genesis.Hash(), genesis.NumberU64(), genesis.Difficulty()); err != nil {
|
|
log.Crit("Failed to write genesis block TD", "err", err)
|
|
}
|
|
rawdb.WriteBlock(bc.db, genesis)
|
|
|
|
bc.genesisBlock = genesis
|
|
bc.insert(bc.genesisBlock)
|
|
bc.currentBlock.Store(bc.genesisBlock)
|
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bc.hc.SetGenesis(bc.genesisBlock.Header())
|
|
bc.hc.SetCurrentHeader(bc.genesisBlock.Header())
|
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bc.currentFastBlock.Store(bc.genesisBlock)
|
|
|
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return nil
|
|
}
|
|
|
|
// repair tries to repair the current blockchain by rolling back the current block
|
|
// until one with associated state is found. This is needed to fix incomplete db
|
|
// writes caused either by crashes/power outages, or simply non-committed tries.
|
|
//
|
|
// This method only rolls back the current block. The current header and current
|
|
// fast block are left intact.
|
|
func (bc *BlockChain) repair(head **types.Block) error {
|
|
for {
|
|
// Abort if we've rewound to a head block that does have associated state
|
|
if _, err := state.New((*head).Root(), bc.stateCache); err == nil {
|
|
log.Info("Rewound blockchain to past state", "number", (*head).Number(), "hash", (*head).Hash())
|
|
return nil
|
|
}
|
|
// Otherwise rewind one block and recheck state availability there
|
|
block := bc.GetBlock((*head).ParentHash(), (*head).NumberU64()-1)
|
|
if block == nil {
|
|
return fmt.Errorf("missing block %d [%x]", (*head).NumberU64()-1, (*head).ParentHash())
|
|
}
|
|
(*head) = block
|
|
}
|
|
}
|
|
|
|
// Export writes the active chain to the given writer.
|
|
func (bc *BlockChain) Export(w io.Writer) error {
|
|
return bc.ExportN(w, uint64(0), bc.CurrentBlock().NumberU64())
|
|
}
|
|
|
|
// ExportN writes a subset of the active chain to the given writer.
|
|
func (bc *BlockChain) ExportN(w io.Writer, first uint64, last uint64) error {
|
|
bc.chainmu.RLock()
|
|
defer bc.chainmu.RUnlock()
|
|
|
|
if first > last {
|
|
return fmt.Errorf("export failed: first (%d) is greater than last (%d)", first, last)
|
|
}
|
|
log.Info("Exporting batch of blocks", "count", last-first+1)
|
|
|
|
start, reported := time.Now(), time.Now()
|
|
for nr := first; nr <= last; nr++ {
|
|
block := bc.GetBlockByNumber(nr)
|
|
if block == nil {
|
|
return fmt.Errorf("export failed on #%d: not found", nr)
|
|
}
|
|
if err := block.EncodeRLP(w); err != nil {
|
|
return err
|
|
}
|
|
if time.Since(reported) >= statsReportLimit {
|
|
log.Info("Exporting blocks", "exported", block.NumberU64()-first, "elapsed", common.PrettyDuration(time.Since(start)))
|
|
reported = time.Now()
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// insert injects a new head block into the current block chain. This method
|
|
// assumes that the block is indeed a true head. It will also reset the head
|
|
// header and the head fast sync block to this very same block if they are older
|
|
// or if they are on a different side chain.
|
|
//
|
|
// Note, this function assumes that the `mu` mutex is held!
|
|
func (bc *BlockChain) insert(block *types.Block) {
|
|
// If the block is on a side chain or an unknown one, force other heads onto it too
|
|
updateHeads := rawdb.ReadCanonicalHash(bc.db, block.NumberU64()) != block.Hash()
|
|
|
|
// Add the block to the canonical chain number scheme and mark as the head
|
|
rawdb.WriteCanonicalHash(bc.db, block.Hash(), block.NumberU64())
|
|
rawdb.WriteHeadBlockHash(bc.db, block.Hash())
|
|
|
|
bc.currentBlock.Store(block)
|
|
|
|
// If the block is better than our head or is on a different chain, force update heads
|
|
if updateHeads {
|
|
bc.hc.SetCurrentHeader(block.Header())
|
|
rawdb.WriteHeadFastBlockHash(bc.db, block.Hash())
|
|
|
|
bc.currentFastBlock.Store(block)
|
|
}
|
|
}
|
|
|
|
// Genesis retrieves the chain's genesis block.
|
|
func (bc *BlockChain) Genesis() *types.Block {
|
|
return bc.genesisBlock
|
|
}
|
|
|
|
// GetBody retrieves a block body (transactions and uncles) from the database by
|
|
// hash, caching it if found.
|
|
func (bc *BlockChain) GetBody(hash common.Hash) *types.Body {
|
|
// Short circuit if the body's already in the cache, retrieve otherwise
|
|
if cached, ok := bc.bodyCache.Get(hash); ok {
|
|
body := cached.(*types.Body)
|
|
return body
|
|
}
|
|
number := bc.hc.GetBlockNumber(hash)
|
|
if number == nil {
|
|
return nil
|
|
}
|
|
body := rawdb.ReadBody(bc.db, hash, *number)
|
|
if body == nil {
|
|
return nil
|
|
}
|
|
// Cache the found body for next time and return
|
|
bc.bodyCache.Add(hash, body)
|
|
return body
|
|
}
|
|
|
|
// GetBodyRLP retrieves a block body in RLP encoding from the database by hash,
|
|
// caching it if found.
|
|
func (bc *BlockChain) GetBodyRLP(hash common.Hash) rlp.RawValue {
|
|
// Short circuit if the body's already in the cache, retrieve otherwise
|
|
if cached, ok := bc.bodyRLPCache.Get(hash); ok {
|
|
return cached.(rlp.RawValue)
|
|
}
|
|
number := bc.hc.GetBlockNumber(hash)
|
|
if number == nil {
|
|
return nil
|
|
}
|
|
body := rawdb.ReadBodyRLP(bc.db, hash, *number)
|
|
if len(body) == 0 {
|
|
return nil
|
|
}
|
|
// Cache the found body for next time and return
|
|
bc.bodyRLPCache.Add(hash, body)
|
|
return body
|
|
}
|
|
|
|
// HasBlock checks if a block is fully present in the database or not.
|
|
func (bc *BlockChain) HasBlock(hash common.Hash, number uint64) bool {
|
|
if bc.blockCache.Contains(hash) {
|
|
return true
|
|
}
|
|
return rawdb.HasBody(bc.db, hash, number)
|
|
}
|
|
|
|
// HasFastBlock checks if a fast block is fully present in the database or not.
|
|
func (bc *BlockChain) HasFastBlock(hash common.Hash, number uint64) bool {
|
|
if !bc.HasBlock(hash, number) {
|
|
return false
|
|
}
|
|
if bc.receiptsCache.Contains(hash) {
|
|
return true
|
|
}
|
|
return rawdb.HasReceipts(bc.db, hash, number)
|
|
}
|
|
|
|
// HasState checks if state trie is fully present in the database or not.
|
|
func (bc *BlockChain) HasState(hash common.Hash) bool {
|
|
_, err := bc.stateCache.OpenTrie(hash)
|
|
return err == nil
|
|
}
|
|
|
|
// HasBlockAndState checks if a block and associated state trie is fully present
|
|
// in the database or not, caching it if present.
|
|
func (bc *BlockChain) HasBlockAndState(hash common.Hash, number uint64) bool {
|
|
// Check first that the block itself is known
|
|
block := bc.GetBlock(hash, number)
|
|
if block == nil {
|
|
return false
|
|
}
|
|
return bc.HasState(block.Root())
|
|
}
|
|
|
|
// GetBlock retrieves a block from the database by hash and number,
|
|
// caching it if found.
|
|
func (bc *BlockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
|
|
// Short circuit if the block's already in the cache, retrieve otherwise
|
|
if block, ok := bc.blockCache.Get(hash); ok {
|
|
return block.(*types.Block)
|
|
}
|
|
block := rawdb.ReadBlock(bc.db, hash, number)
|
|
if block == nil {
|
|
return nil
|
|
}
|
|
// Cache the found block for next time and return
|
|
bc.blockCache.Add(block.Hash(), block)
|
|
return block
|
|
}
|
|
|
|
// GetBlockByHash retrieves a block from the database by hash, caching it if found.
|
|
func (bc *BlockChain) GetBlockByHash(hash common.Hash) *types.Block {
|
|
number := bc.hc.GetBlockNumber(hash)
|
|
if number == nil {
|
|
return nil
|
|
}
|
|
return bc.GetBlock(hash, *number)
|
|
}
|
|
|
|
// GetBlockByNumber retrieves a block from the database by number, caching it
|
|
// (associated with its hash) if found.
|
|
func (bc *BlockChain) GetBlockByNumber(number uint64) *types.Block {
|
|
hash := rawdb.ReadCanonicalHash(bc.db, number)
|
|
if hash == (common.Hash{}) {
|
|
return nil
|
|
}
|
|
return bc.GetBlock(hash, number)
|
|
}
|
|
|
|
// GetReceiptsByHash retrieves the receipts for all transactions in a given block.
|
|
func (bc *BlockChain) GetReceiptsByHash(hash common.Hash) types.Receipts {
|
|
if receipts, ok := bc.receiptsCache.Get(hash); ok {
|
|
return receipts.(types.Receipts)
|
|
}
|
|
number := rawdb.ReadHeaderNumber(bc.db, hash)
|
|
if number == nil {
|
|
return nil
|
|
}
|
|
receipts := rawdb.ReadReceipts(bc.db, hash, *number)
|
|
if receipts == nil {
|
|
return nil
|
|
}
|
|
bc.receiptsCache.Add(hash, receipts)
|
|
return receipts
|
|
}
|
|
|
|
// GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors.
|
|
// [deprecated by eth/62]
|
|
func (bc *BlockChain) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
|
|
number := bc.hc.GetBlockNumber(hash)
|
|
if number == nil {
|
|
return nil
|
|
}
|
|
for i := 0; i < n; i++ {
|
|
block := bc.GetBlock(hash, *number)
|
|
if block == nil {
|
|
break
|
|
}
|
|
blocks = append(blocks, block)
|
|
hash = block.ParentHash()
|
|
*number--
|
|
}
|
|
return
|
|
}
|
|
|
|
// GetUnclesInChain retrieves all the uncles from a given block backwards until
|
|
// a specific distance is reached.
|
|
func (bc *BlockChain) GetUnclesInChain(block *types.Block, length int) []*types.Header {
|
|
uncles := []*types.Header{}
|
|
for i := 0; block != nil && i < length; i++ {
|
|
uncles = append(uncles, block.Uncles()...)
|
|
block = bc.GetBlock(block.ParentHash(), block.NumberU64()-1)
|
|
}
|
|
return uncles
|
|
}
|
|
|
|
// TrieNode retrieves a blob of data associated with a trie node (or code hash)
|
|
// either from ephemeral in-memory cache, or from persistent storage.
|
|
func (bc *BlockChain) TrieNode(hash common.Hash) ([]byte, error) {
|
|
return bc.stateCache.TrieDB().Node(hash)
|
|
}
|
|
|
|
// Stop stops the blockchain service. If any imports are currently in progress
|
|
// it will abort them using the procInterrupt.
|
|
func (bc *BlockChain) Stop() {
|
|
if !atomic.CompareAndSwapInt32(&bc.running, 0, 1) {
|
|
return
|
|
}
|
|
// Unsubscribe all subscriptions registered from blockchain
|
|
bc.scope.Close()
|
|
close(bc.quit)
|
|
atomic.StoreInt32(&bc.procInterrupt, 1)
|
|
|
|
bc.wg.Wait()
|
|
|
|
// Ensure the state of a recent block is also stored to disk before exiting.
|
|
// We're writing three different states to catch different restart scenarios:
|
|
// - HEAD: So we don't need to reprocess any blocks in the general case
|
|
// - HEAD-1: So we don't do large reorgs if our HEAD becomes an uncle
|
|
// - HEAD-127: So we have a hard limit on the number of blocks reexecuted
|
|
if !bc.cacheConfig.Disabled {
|
|
triedb := bc.stateCache.TrieDB()
|
|
|
|
for _, offset := range []uint64{0, 1, triesInMemory - 1} {
|
|
if number := bc.CurrentBlock().NumberU64(); number > offset {
|
|
recent := bc.GetBlockByNumber(number - offset)
|
|
|
|
log.Info("Writing cached state to disk", "block", recent.Number(), "hash", recent.Hash(), "root", recent.Root())
|
|
if err := triedb.Commit(recent.Root(), true); err != nil {
|
|
log.Error("Failed to commit recent state trie", "err", err)
|
|
}
|
|
}
|
|
}
|
|
for !bc.triegc.Empty() {
|
|
triedb.Dereference(bc.triegc.PopItem().(common.Hash))
|
|
}
|
|
if size, _ := triedb.Size(); size != 0 {
|
|
log.Error("Dangling trie nodes after full cleanup")
|
|
}
|
|
}
|
|
log.Info("Blockchain manager stopped")
|
|
}
|
|
|
|
func (bc *BlockChain) procFutureBlocks() {
|
|
blocks := make([]*types.Block, 0, bc.futureBlocks.Len())
|
|
for _, hash := range bc.futureBlocks.Keys() {
|
|
if block, exist := bc.futureBlocks.Peek(hash); exist {
|
|
blocks = append(blocks, block.(*types.Block))
|
|
}
|
|
}
|
|
if len(blocks) > 0 {
|
|
types.BlockBy(types.Number).Sort(blocks)
|
|
|
|
// Insert one by one as chain insertion needs contiguous ancestry between blocks
|
|
for i := range blocks {
|
|
bc.InsertChain(blocks[i : i+1])
|
|
}
|
|
}
|
|
}
|
|
|
|
// WriteStatus status of write
|
|
type WriteStatus byte
|
|
|
|
const (
|
|
NonStatTy WriteStatus = iota
|
|
CanonStatTy
|
|
SideStatTy
|
|
)
|
|
|
|
// Rollback is designed to remove a chain of links from the database that aren't
|
|
// certain enough to be valid.
|
|
func (bc *BlockChain) Rollback(chain []common.Hash) {
|
|
bc.chainmu.Lock()
|
|
defer bc.chainmu.Unlock()
|
|
|
|
for i := len(chain) - 1; i >= 0; i-- {
|
|
hash := chain[i]
|
|
|
|
currentHeader := bc.hc.CurrentHeader()
|
|
if currentHeader.Hash() == hash {
|
|
bc.hc.SetCurrentHeader(bc.GetHeader(currentHeader.ParentHash, currentHeader.Number.Uint64()-1))
|
|
}
|
|
if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock.Hash() == hash {
|
|
newFastBlock := bc.GetBlock(currentFastBlock.ParentHash(), currentFastBlock.NumberU64()-1)
|
|
bc.currentFastBlock.Store(newFastBlock)
|
|
rawdb.WriteHeadFastBlockHash(bc.db, newFastBlock.Hash())
|
|
}
|
|
if currentBlock := bc.CurrentBlock(); currentBlock.Hash() == hash {
|
|
newBlock := bc.GetBlock(currentBlock.ParentHash(), currentBlock.NumberU64()-1)
|
|
bc.currentBlock.Store(newBlock)
|
|
rawdb.WriteHeadBlockHash(bc.db, newBlock.Hash())
|
|
}
|
|
}
|
|
}
|
|
|
|
// SetReceiptsData computes all the non-consensus fields of the receipts
|
|
func SetReceiptsData(config *params.ChainConfig, block *types.Block, receipts types.Receipts) error {
|
|
signer := types.MakeSigner(config, block.Number())
|
|
|
|
transactions, logIndex := block.Transactions(), uint(0)
|
|
if len(transactions) != len(receipts) {
|
|
return errors.New("transaction and receipt count mismatch")
|
|
}
|
|
|
|
for j := 0; j < len(receipts); j++ {
|
|
// The transaction hash can be retrieved from the transaction itself
|
|
receipts[j].TxHash = transactions[j].Hash()
|
|
|
|
// The contract address can be derived from the transaction itself
|
|
if transactions[j].To() == nil {
|
|
// Deriving the signer is expensive, only do if it's actually needed
|
|
from, _ := types.Sender(signer, transactions[j])
|
|
receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
|
|
}
|
|
// The used gas can be calculated based on previous receipts
|
|
if j == 0 {
|
|
receipts[j].GasUsed = receipts[j].CumulativeGasUsed
|
|
} else {
|
|
receipts[j].GasUsed = receipts[j].CumulativeGasUsed - receipts[j-1].CumulativeGasUsed
|
|
}
|
|
// The derived log fields can simply be set from the block and transaction
|
|
for k := 0; k < len(receipts[j].Logs); k++ {
|
|
receipts[j].Logs[k].BlockNumber = block.NumberU64()
|
|
receipts[j].Logs[k].BlockHash = block.Hash()
|
|
receipts[j].Logs[k].TxHash = receipts[j].TxHash
|
|
receipts[j].Logs[k].TxIndex = uint(j)
|
|
receipts[j].Logs[k].Index = logIndex
|
|
logIndex++
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// InsertReceiptChain attempts to complete an already existing header chain with
|
|
// transaction and receipt data.
|
|
func (bc *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain []types.Receipts) (int, error) {
|
|
bc.wg.Add(1)
|
|
defer bc.wg.Done()
|
|
|
|
// Do a sanity check that the provided chain is actually ordered and linked
|
|
for i := 1; i < len(blockChain); i++ {
|
|
if blockChain[i].NumberU64() != blockChain[i-1].NumberU64()+1 || blockChain[i].ParentHash() != blockChain[i-1].Hash() {
|
|
log.Error("Non contiguous receipt insert", "number", blockChain[i].Number(), "hash", blockChain[i].Hash(), "parent", blockChain[i].ParentHash(),
|
|
"prevnumber", blockChain[i-1].Number(), "prevhash", blockChain[i-1].Hash())
|
|
return 0, fmt.Errorf("non contiguous insert: item %d is #%d [%x…], item %d is #%d [%x…] (parent [%x…])", i-1, blockChain[i-1].NumberU64(),
|
|
blockChain[i-1].Hash().Bytes()[:4], i, blockChain[i].NumberU64(), blockChain[i].Hash().Bytes()[:4], blockChain[i].ParentHash().Bytes()[:4])
|
|
}
|
|
}
|
|
|
|
var (
|
|
stats = struct{ processed, ignored int32 }{}
|
|
start = time.Now()
|
|
bytes = 0
|
|
batch = bc.db.NewBatch()
|
|
)
|
|
for i, block := range blockChain {
|
|
receipts := receiptChain[i]
|
|
// Short circuit insertion if shutting down or processing failed
|
|
if atomic.LoadInt32(&bc.procInterrupt) == 1 {
|
|
return 0, nil
|
|
}
|
|
// Short circuit if the owner header is unknown
|
|
if !bc.HasHeader(block.Hash(), block.NumberU64()) {
|
|
return i, fmt.Errorf("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
|
|
}
|
|
// Skip if the entire data is already known
|
|
if bc.HasBlock(block.Hash(), block.NumberU64()) {
|
|
stats.ignored++
|
|
continue
|
|
}
|
|
// Compute all the non-consensus fields of the receipts
|
|
if err := SetReceiptsData(bc.chainConfig, block, receipts); err != nil {
|
|
return i, fmt.Errorf("failed to set receipts data: %v", err)
|
|
}
|
|
// Write all the data out into the database
|
|
rawdb.WriteBody(batch, block.Hash(), block.NumberU64(), block.Body())
|
|
rawdb.WriteReceipts(batch, block.Hash(), block.NumberU64(), receipts)
|
|
rawdb.WriteTxLookupEntries(batch, block)
|
|
|
|
stats.processed++
|
|
|
|
if batch.ValueSize() >= ethdb.IdealBatchSize {
|
|
if err := batch.Write(); err != nil {
|
|
return 0, err
|
|
}
|
|
bytes += batch.ValueSize()
|
|
batch.Reset()
|
|
}
|
|
}
|
|
if batch.ValueSize() > 0 {
|
|
bytes += batch.ValueSize()
|
|
if err := batch.Write(); err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
|
|
// Update the head fast sync block if better
|
|
bc.chainmu.Lock()
|
|
head := blockChain[len(blockChain)-1]
|
|
if td := bc.GetTd(head.Hash(), head.NumberU64()); td != nil { // Rewind may have occurred, skip in that case
|
|
currentFastBlock := bc.CurrentFastBlock()
|
|
if bc.GetTd(currentFastBlock.Hash(), currentFastBlock.NumberU64()).Cmp(td) < 0 {
|
|
rawdb.WriteHeadFastBlockHash(bc.db, head.Hash())
|
|
bc.currentFastBlock.Store(head)
|
|
}
|
|
}
|
|
bc.chainmu.Unlock()
|
|
|
|
context := []interface{}{
|
|
"count", stats.processed, "elapsed", common.PrettyDuration(time.Since(start)),
|
|
"number", head.Number(), "hash", head.Hash(), "age", common.PrettyAge(time.Unix(head.Time().Int64(), 0)),
|
|
"size", common.StorageSize(bytes),
|
|
}
|
|
if stats.ignored > 0 {
|
|
context = append(context, []interface{}{"ignored", stats.ignored}...)
|
|
}
|
|
log.Info("Imported new block receipts", context...)
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
var lastWrite uint64
|
|
|
|
// WriteBlockWithoutState writes only the block and its metadata to the database,
|
|
// but does not write any state. This is used to construct competing side forks
|
|
// up to the point where they exceed the canonical total difficulty.
|
|
func (bc *BlockChain) WriteBlockWithoutState(block *types.Block, td *big.Int) (err error) {
|
|
bc.wg.Add(1)
|
|
defer bc.wg.Done()
|
|
|
|
if err := bc.hc.WriteTd(block.Hash(), block.NumberU64(), td); err != nil {
|
|
return err
|
|
}
|
|
rawdb.WriteBlock(bc.db, block)
|
|
|
|
return nil
|
|
}
|
|
|
|
// WriteBlockWithState writes the block and all associated state to the database.
|
|
func (bc *BlockChain) WriteBlockWithState(block *types.Block, receipts []*types.Receipt, state *state.StateDB) (status WriteStatus, err error) {
|
|
bc.chainmu.Lock()
|
|
defer bc.chainmu.Unlock()
|
|
|
|
return bc.writeBlockWithState(block, receipts, state)
|
|
}
|
|
|
|
// writeBlockWithState writes the block and all associated state to the database,
|
|
// but is expects the chain mutex to be held.
|
|
func (bc *BlockChain) writeBlockWithState(block *types.Block, receipts []*types.Receipt, state *state.StateDB) (status WriteStatus, err error) {
|
|
bc.wg.Add(1)
|
|
defer bc.wg.Done()
|
|
|
|
// Calculate the total difficulty of the block
|
|
ptd := bc.GetTd(block.ParentHash(), block.NumberU64()-1)
|
|
if ptd == nil {
|
|
return NonStatTy, consensus.ErrUnknownAncestor
|
|
}
|
|
// Make sure no inconsistent state is leaked during insertion
|
|
currentBlock := bc.CurrentBlock()
|
|
localTd := bc.GetTd(currentBlock.Hash(), currentBlock.NumberU64())
|
|
externTd := new(big.Int).Add(block.Difficulty(), ptd)
|
|
|
|
// Irrelevant of the canonical status, write the block itself to the database
|
|
if err := bc.hc.WriteTd(block.Hash(), block.NumberU64(), externTd); err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
rawdb.WriteBlock(bc.db, block)
|
|
|
|
root, err := state.Commit(bc.chainConfig.IsEIP158(block.Number()))
|
|
if err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
triedb := bc.stateCache.TrieDB()
|
|
|
|
// If we're running an archive node, always flush
|
|
if bc.cacheConfig.Disabled {
|
|
if err := triedb.Commit(root, false); err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
} else {
|
|
// Full but not archive node, do proper garbage collection
|
|
triedb.Reference(root, common.Hash{}) // metadata reference to keep trie alive
|
|
bc.triegc.Push(root, -int64(block.NumberU64()))
|
|
|
|
if current := block.NumberU64(); current > triesInMemory {
|
|
// If we exceeded our memory allowance, flush matured singleton nodes to disk
|
|
var (
|
|
nodes, imgs = triedb.Size()
|
|
limit = common.StorageSize(bc.cacheConfig.TrieDirtyLimit) * 1024 * 1024
|
|
)
|
|
if nodes > limit || imgs > 4*1024*1024 {
|
|
triedb.Cap(limit - ethdb.IdealBatchSize)
|
|
}
|
|
// Find the next state trie we need to commit
|
|
header := bc.GetHeaderByNumber(current - triesInMemory)
|
|
chosen := header.Number.Uint64()
|
|
|
|
// If we exceeded out time allowance, flush an entire trie to disk
|
|
if bc.gcproc > bc.cacheConfig.TrieTimeLimit {
|
|
// If we're exceeding limits but haven't reached a large enough memory gap,
|
|
// warn the user that the system is becoming unstable.
|
|
if chosen < lastWrite+triesInMemory && bc.gcproc >= 2*bc.cacheConfig.TrieTimeLimit {
|
|
log.Info("State in memory for too long, committing", "time", bc.gcproc, "allowance", bc.cacheConfig.TrieTimeLimit, "optimum", float64(chosen-lastWrite)/triesInMemory)
|
|
}
|
|
// Flush an entire trie and restart the counters
|
|
triedb.Commit(header.Root, true)
|
|
lastWrite = chosen
|
|
bc.gcproc = 0
|
|
}
|
|
// Garbage collect anything below our required write retention
|
|
for !bc.triegc.Empty() {
|
|
root, number := bc.triegc.Pop()
|
|
if uint64(-number) > chosen {
|
|
bc.triegc.Push(root, number)
|
|
break
|
|
}
|
|
triedb.Dereference(root.(common.Hash))
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write other block data using a batch.
|
|
batch := bc.db.NewBatch()
|
|
rawdb.WriteReceipts(batch, block.Hash(), block.NumberU64(), receipts)
|
|
|
|
// If the total difficulty is higher than our known, add it to the canonical chain
|
|
// Second clause in the if statement reduces the vulnerability to selfish mining.
|
|
// Please refer to http://www.cs.cornell.edu/~ie53/publications/btcProcFC.pdf
|
|
reorg := externTd.Cmp(localTd) > 0
|
|
currentBlock = bc.CurrentBlock()
|
|
if !reorg && externTd.Cmp(localTd) == 0 {
|
|
// Split same-difficulty blocks by number, then preferentially select
|
|
// the block generated by the local miner as the canonical block.
|
|
if block.NumberU64() < currentBlock.NumberU64() {
|
|
reorg = true
|
|
} else if block.NumberU64() == currentBlock.NumberU64() {
|
|
var currentPreserve, blockPreserve bool
|
|
if bc.shouldPreserve != nil {
|
|
currentPreserve, blockPreserve = bc.shouldPreserve(currentBlock), bc.shouldPreserve(block)
|
|
}
|
|
reorg = !currentPreserve && (blockPreserve || mrand.Float64() < 0.5)
|
|
}
|
|
}
|
|
if reorg {
|
|
// Reorganise the chain if the parent is not the head block
|
|
if block.ParentHash() != currentBlock.Hash() {
|
|
if err := bc.reorg(currentBlock, block); err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
}
|
|
// Write the positional metadata for transaction/receipt lookups and preimages
|
|
rawdb.WriteTxLookupEntries(batch, block)
|
|
rawdb.WritePreimages(batch, state.Preimages())
|
|
|
|
status = CanonStatTy
|
|
} else {
|
|
status = SideStatTy
|
|
}
|
|
if err := batch.Write(); err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
|
|
// Set new head.
|
|
if status == CanonStatTy {
|
|
bc.insert(block)
|
|
}
|
|
bc.futureBlocks.Remove(block.Hash())
|
|
return status, nil
|
|
}
|
|
|
|
// addFutureBlock checks if the block is within the max allowed window to get
|
|
// accepted for future processing, and returns an error if the block is too far
|
|
// ahead and was not added.
|
|
func (bc *BlockChain) addFutureBlock(block *types.Block) error {
|
|
max := big.NewInt(time.Now().Unix() + maxTimeFutureBlocks)
|
|
if block.Time().Cmp(max) > 0 {
|
|
return fmt.Errorf("future block timestamp %v > allowed %v", block.Time(), max)
|
|
}
|
|
bc.futureBlocks.Add(block.Hash(), block)
|
|
return nil
|
|
}
|
|
|
|
// InsertChain attempts to insert the given batch of blocks in to the canonical
|
|
// chain or, otherwise, create a fork. If an error is returned it will return
|
|
// the index number of the failing block as well an error describing what went
|
|
// wrong.
|
|
//
|
|
// After insertion is done, all accumulated events will be fired.
|
|
func (bc *BlockChain) InsertChain(chain types.Blocks) (int, error) {
|
|
// Sanity check that we have something meaningful to import
|
|
if len(chain) == 0 {
|
|
return 0, nil
|
|
}
|
|
// Do a sanity check that the provided chain is actually ordered and linked
|
|
for i := 1; i < len(chain); i++ {
|
|
if chain[i].NumberU64() != chain[i-1].NumberU64()+1 || chain[i].ParentHash() != chain[i-1].Hash() {
|
|
// Chain broke ancestry, log a message (programming error) and skip insertion
|
|
log.Error("Non contiguous block insert", "number", chain[i].Number(), "hash", chain[i].Hash(),
|
|
"parent", chain[i].ParentHash(), "prevnumber", chain[i-1].Number(), "prevhash", chain[i-1].Hash())
|
|
|
|
return 0, fmt.Errorf("non contiguous insert: item %d is #%d [%x…], item %d is #%d [%x…] (parent [%x…])", i-1, chain[i-1].NumberU64(),
|
|
chain[i-1].Hash().Bytes()[:4], i, chain[i].NumberU64(), chain[i].Hash().Bytes()[:4], chain[i].ParentHash().Bytes()[:4])
|
|
}
|
|
}
|
|
// Pre-checks passed, start the full block imports
|
|
bc.wg.Add(1)
|
|
bc.chainmu.Lock()
|
|
n, events, logs, err := bc.insertChain(chain, true)
|
|
bc.chainmu.Unlock()
|
|
bc.wg.Done()
|
|
|
|
bc.PostChainEvents(events, logs)
|
|
return n, err
|
|
}
|
|
|
|
// insertChain is the internal implementation of insertChain, which assumes that
|
|
// 1) chains are contiguous, and 2) The chain mutex is held.
|
|
//
|
|
// This method is split out so that import batches that require re-injecting
|
|
// historical blocks can do so without releasing the lock, which could lead to
|
|
// racey behaviour. If a sidechain import is in progress, and the historic state
|
|
// is imported, but then new canon-head is added before the actual sidechain
|
|
// completes, then the historic state could be pruned again
|
|
func (bc *BlockChain) insertChain(chain types.Blocks, verifySeals bool) (int, []interface{}, []*types.Log, error) {
|
|
// If the chain is terminating, don't even bother starting u
|
|
if atomic.LoadInt32(&bc.procInterrupt) == 1 {
|
|
return 0, nil, nil, nil
|
|
}
|
|
// Start a parallel signature recovery (signer will fluke on fork transition, minimal perf loss)
|
|
senderCacher.recoverFromBlocks(types.MakeSigner(bc.chainConfig, chain[0].Number()), chain)
|
|
|
|
// A queued approach to delivering events. This is generally
|
|
// faster than direct delivery and requires much less mutex
|
|
// acquiring.
|
|
var (
|
|
stats = insertStats{startTime: mclock.Now()}
|
|
events = make([]interface{}, 0, len(chain))
|
|
lastCanon *types.Block
|
|
coalescedLogs []*types.Log
|
|
)
|
|
// Start the parallel header verifier
|
|
headers := make([]*types.Header, len(chain))
|
|
seals := make([]bool, len(chain))
|
|
|
|
for i, block := range chain {
|
|
headers[i] = block.Header()
|
|
seals[i] = verifySeals
|
|
}
|
|
abort, results := bc.engine.VerifyHeaders(bc, headers, seals)
|
|
defer close(abort)
|
|
|
|
// Peek the error for the first block to decide the directing import logic
|
|
it := newInsertIterator(chain, results, bc.Validator())
|
|
|
|
block, err := it.next()
|
|
switch {
|
|
// First block is pruned, insert as sidechain and reorg only if TD grows enough
|
|
case err == consensus.ErrPrunedAncestor:
|
|
return bc.insertSidechain(it)
|
|
|
|
// First block is future, shove it (and all children) to the future queue (unknown ancestor)
|
|
case err == consensus.ErrFutureBlock || (err == consensus.ErrUnknownAncestor && bc.futureBlocks.Contains(it.first().ParentHash())):
|
|
for block != nil && (it.index == 0 || err == consensus.ErrUnknownAncestor) {
|
|
if err := bc.addFutureBlock(block); err != nil {
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
block, err = it.next()
|
|
}
|
|
stats.queued += it.processed()
|
|
stats.ignored += it.remaining()
|
|
|
|
// If there are any still remaining, mark as ignored
|
|
return it.index, events, coalescedLogs, err
|
|
|
|
// First block (and state) is known
|
|
// 1. We did a roll-back, and should now do a re-import
|
|
// 2. The block is stored as a sidechain, and is lying about it's stateroot, and passes a stateroot
|
|
// from the canonical chain, which has not been verified.
|
|
case err == ErrKnownBlock:
|
|
// Skip all known blocks that behind us
|
|
current := bc.CurrentBlock().NumberU64()
|
|
|
|
for block != nil && err == ErrKnownBlock && current >= block.NumberU64() {
|
|
stats.ignored++
|
|
block, err = it.next()
|
|
}
|
|
// Falls through to the block import
|
|
|
|
// Some other error occurred, abort
|
|
case err != nil:
|
|
stats.ignored += len(it.chain)
|
|
bc.reportBlock(block, nil, err)
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
// No validation errors for the first block (or chain prefix skipped)
|
|
for ; block != nil && err == nil; block, err = it.next() {
|
|
// If the chain is terminating, stop processing blocks
|
|
if atomic.LoadInt32(&bc.procInterrupt) == 1 {
|
|
log.Debug("Premature abort during blocks processing")
|
|
break
|
|
}
|
|
// If the header is a banned one, straight out abort
|
|
if BadHashes[block.Hash()] {
|
|
bc.reportBlock(block, nil, ErrBlacklistedHash)
|
|
return it.index, events, coalescedLogs, ErrBlacklistedHash
|
|
}
|
|
// Retrieve the parent block and it's state to execute on top
|
|
start := time.Now()
|
|
|
|
parent := it.previous()
|
|
if parent == nil {
|
|
parent = bc.GetBlock(block.ParentHash(), block.NumberU64()-1)
|
|
}
|
|
state, err := state.New(parent.Root(), bc.stateCache)
|
|
if err != nil {
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
// Process block using the parent state as reference point.
|
|
t0 := time.Now()
|
|
receipts, logs, usedGas, err := bc.processor.Process(block, state, bc.vmConfig)
|
|
t1 := time.Now()
|
|
if err != nil {
|
|
bc.reportBlock(block, receipts, err)
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
// Validate the state using the default validator
|
|
if err := bc.Validator().ValidateState(block, parent, state, receipts, usedGas); err != nil {
|
|
bc.reportBlock(block, receipts, err)
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
t2 := time.Now()
|
|
proctime := time.Since(start)
|
|
|
|
// Write the block to the chain and get the status.
|
|
status, err := bc.writeBlockWithState(block, receipts, state)
|
|
t3 := time.Now()
|
|
if err != nil {
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
blockInsertTimer.UpdateSince(start)
|
|
blockExecutionTimer.Update(t1.Sub(t0))
|
|
blockValidationTimer.Update(t2.Sub(t1))
|
|
blockWriteTimer.Update(t3.Sub(t2))
|
|
switch status {
|
|
case CanonStatTy:
|
|
log.Debug("Inserted new block", "number", block.Number(), "hash", block.Hash(),
|
|
"uncles", len(block.Uncles()), "txs", len(block.Transactions()), "gas", block.GasUsed(),
|
|
"elapsed", common.PrettyDuration(time.Since(start)),
|
|
"root", block.Root())
|
|
|
|
coalescedLogs = append(coalescedLogs, logs...)
|
|
events = append(events, ChainEvent{block, block.Hash(), logs})
|
|
lastCanon = block
|
|
|
|
// Only count canonical blocks for GC processing time
|
|
bc.gcproc += proctime
|
|
|
|
case SideStatTy:
|
|
log.Debug("Inserted forked block", "number", block.Number(), "hash", block.Hash(),
|
|
"diff", block.Difficulty(), "elapsed", common.PrettyDuration(time.Since(start)),
|
|
"txs", len(block.Transactions()), "gas", block.GasUsed(), "uncles", len(block.Uncles()),
|
|
"root", block.Root())
|
|
events = append(events, ChainSideEvent{block})
|
|
}
|
|
blockInsertTimer.UpdateSince(start)
|
|
stats.processed++
|
|
stats.usedGas += usedGas
|
|
|
|
cache, _ := bc.stateCache.TrieDB().Size()
|
|
stats.report(chain, it.index, cache)
|
|
}
|
|
// Any blocks remaining here? The only ones we care about are the future ones
|
|
if block != nil && err == consensus.ErrFutureBlock {
|
|
if err := bc.addFutureBlock(block); err != nil {
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
block, err = it.next()
|
|
|
|
for ; block != nil && err == consensus.ErrUnknownAncestor; block, err = it.next() {
|
|
if err := bc.addFutureBlock(block); err != nil {
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
stats.queued++
|
|
}
|
|
}
|
|
stats.ignored += it.remaining()
|
|
|
|
// Append a single chain head event if we've progressed the chain
|
|
if lastCanon != nil && bc.CurrentBlock().Hash() == lastCanon.Hash() {
|
|
events = append(events, ChainHeadEvent{lastCanon})
|
|
}
|
|
return it.index, events, coalescedLogs, err
|
|
}
|
|
|
|
// insertSidechain is called when an import batch hits upon a pruned ancestor
|
|
// error, which happens when a sidechain with a sufficiently old fork-block is
|
|
// found.
|
|
//
|
|
// The method writes all (header-and-body-valid) blocks to disk, then tries to
|
|
// switch over to the new chain if the TD exceeded the current chain.
|
|
func (bc *BlockChain) insertSidechain(it *insertIterator) (int, []interface{}, []*types.Log, error) {
|
|
var (
|
|
externTd *big.Int
|
|
current = bc.CurrentBlock()
|
|
)
|
|
// The first sidechain block error is already verified to be ErrPrunedAncestor.
|
|
// Since we don't import them here, we expect ErrUnknownAncestor for the remaining
|
|
// ones. Any other errors means that the block is invalid, and should not be written
|
|
// to disk.
|
|
block, err := it.current(), consensus.ErrPrunedAncestor
|
|
for ; block != nil && (err == consensus.ErrPrunedAncestor); block, err = it.next() {
|
|
// Check the canonical state root for that number
|
|
if number := block.NumberU64(); current.NumberU64() >= number {
|
|
if canonical := bc.GetBlockByNumber(number); canonical != nil && canonical.Root() == block.Root() {
|
|
// This is most likely a shadow-state attack. When a fork is imported into the
|
|
// database, and it eventually reaches a block height which is not pruned, we
|
|
// just found that the state already exist! This means that the sidechain block
|
|
// refers to a state which already exists in our canon chain.
|
|
//
|
|
// If left unchecked, we would now proceed importing the blocks, without actually
|
|
// having verified the state of the previous blocks.
|
|
log.Warn("Sidechain ghost-state attack detected", "number", block.NumberU64(), "sideroot", block.Root(), "canonroot", canonical.Root())
|
|
|
|
// If someone legitimately side-mines blocks, they would still be imported as usual. However,
|
|
// we cannot risk writing unverified blocks to disk when they obviously target the pruning
|
|
// mechanism.
|
|
return it.index, nil, nil, errors.New("sidechain ghost-state attack")
|
|
}
|
|
}
|
|
if externTd == nil {
|
|
externTd = bc.GetTd(block.ParentHash(), block.NumberU64()-1)
|
|
}
|
|
externTd = new(big.Int).Add(externTd, block.Difficulty())
|
|
|
|
if !bc.HasBlock(block.Hash(), block.NumberU64()) {
|
|
start := time.Now()
|
|
if err := bc.WriteBlockWithoutState(block, externTd); err != nil {
|
|
return it.index, nil, nil, err
|
|
}
|
|
log.Debug("Inserted sidechain block", "number", block.Number(), "hash", block.Hash(),
|
|
"diff", block.Difficulty(), "elapsed", common.PrettyDuration(time.Since(start)),
|
|
"txs", len(block.Transactions()), "gas", block.GasUsed(), "uncles", len(block.Uncles()),
|
|
"root", block.Root())
|
|
}
|
|
}
|
|
// At this point, we've written all sidechain blocks to database. Loop ended
|
|
// either on some other error or all were processed. If there was some other
|
|
// error, we can ignore the rest of those blocks.
|
|
//
|
|
// If the externTd was larger than our local TD, we now need to reimport the previous
|
|
// blocks to regenerate the required state
|
|
localTd := bc.GetTd(current.Hash(), current.NumberU64())
|
|
if localTd.Cmp(externTd) > 0 {
|
|
log.Info("Sidechain written to disk", "start", it.first().NumberU64(), "end", it.previous().NumberU64(), "sidetd", externTd, "localtd", localTd)
|
|
return it.index, nil, nil, err
|
|
}
|
|
// Gather all the sidechain hashes (full blocks may be memory heavy)
|
|
var (
|
|
hashes []common.Hash
|
|
numbers []uint64
|
|
)
|
|
parent := bc.GetHeader(it.previous().Hash(), it.previous().NumberU64())
|
|
for parent != nil && !bc.HasState(parent.Root) {
|
|
hashes = append(hashes, parent.Hash())
|
|
numbers = append(numbers, parent.Number.Uint64())
|
|
|
|
parent = bc.GetHeader(parent.ParentHash, parent.Number.Uint64()-1)
|
|
}
|
|
if parent == nil {
|
|
return it.index, nil, nil, errors.New("missing parent")
|
|
}
|
|
// Import all the pruned blocks to make the state available
|
|
var (
|
|
blocks []*types.Block
|
|
memory common.StorageSize
|
|
)
|
|
for i := len(hashes) - 1; i >= 0; i-- {
|
|
// Append the next block to our batch
|
|
block := bc.GetBlock(hashes[i], numbers[i])
|
|
|
|
blocks = append(blocks, block)
|
|
memory += block.Size()
|
|
|
|
// If memory use grew too large, import and continue. Sadly we need to discard
|
|
// all raised events and logs from notifications since we're too heavy on the
|
|
// memory here.
|
|
if len(blocks) >= 2048 || memory > 64*1024*1024 {
|
|
log.Info("Importing heavy sidechain segment", "blocks", len(blocks), "start", blocks[0].NumberU64(), "end", block.NumberU64())
|
|
if _, _, _, err := bc.insertChain(blocks, false); err != nil {
|
|
return 0, nil, nil, err
|
|
}
|
|
blocks, memory = blocks[:0], 0
|
|
|
|
// If the chain is terminating, stop processing blocks
|
|
if atomic.LoadInt32(&bc.procInterrupt) == 1 {
|
|
log.Debug("Premature abort during blocks processing")
|
|
return 0, nil, nil, nil
|
|
}
|
|
}
|
|
}
|
|
if len(blocks) > 0 {
|
|
log.Info("Importing sidechain segment", "start", blocks[0].NumberU64(), "end", blocks[len(blocks)-1].NumberU64())
|
|
return bc.insertChain(blocks, false)
|
|
}
|
|
return 0, nil, nil, nil
|
|
}
|
|
|
|
// reorgs takes two blocks, an old chain and a new chain and will reconstruct the blocks and inserts them
|
|
// to be part of the new canonical chain and accumulates potential missing transactions and post an
|
|
// event about them
|
|
func (bc *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
|
|
var (
|
|
newChain types.Blocks
|
|
oldChain types.Blocks
|
|
commonBlock *types.Block
|
|
deletedTxs types.Transactions
|
|
deletedLogs []*types.Log
|
|
// collectLogs collects the logs that were generated during the
|
|
// processing of the block that corresponds with the given hash.
|
|
// These logs are later announced as deleted.
|
|
collectLogs = func(hash common.Hash) {
|
|
// Coalesce logs and set 'Removed'.
|
|
number := bc.hc.GetBlockNumber(hash)
|
|
if number == nil {
|
|
return
|
|
}
|
|
receipts := rawdb.ReadReceipts(bc.db, hash, *number)
|
|
for _, receipt := range receipts {
|
|
for _, log := range receipt.Logs {
|
|
del := *log
|
|
del.Removed = true
|
|
deletedLogs = append(deletedLogs, &del)
|
|
}
|
|
}
|
|
}
|
|
)
|
|
|
|
// first reduce whoever is higher bound
|
|
if oldBlock.NumberU64() > newBlock.NumberU64() {
|
|
// reduce old chain
|
|
for ; oldBlock != nil && oldBlock.NumberU64() != newBlock.NumberU64(); oldBlock = bc.GetBlock(oldBlock.ParentHash(), oldBlock.NumberU64()-1) {
|
|
oldChain = append(oldChain, oldBlock)
|
|
deletedTxs = append(deletedTxs, oldBlock.Transactions()...)
|
|
|
|
collectLogs(oldBlock.Hash())
|
|
}
|
|
} else {
|
|
// reduce new chain and append new chain blocks for inserting later on
|
|
for ; newBlock != nil && newBlock.NumberU64() != oldBlock.NumberU64(); newBlock = bc.GetBlock(newBlock.ParentHash(), newBlock.NumberU64()-1) {
|
|
newChain = append(newChain, newBlock)
|
|
}
|
|
}
|
|
if oldBlock == nil {
|
|
return fmt.Errorf("Invalid old chain")
|
|
}
|
|
if newBlock == nil {
|
|
return fmt.Errorf("Invalid new chain")
|
|
}
|
|
|
|
for {
|
|
if oldBlock.Hash() == newBlock.Hash() {
|
|
commonBlock = oldBlock
|
|
break
|
|
}
|
|
|
|
oldChain = append(oldChain, oldBlock)
|
|
newChain = append(newChain, newBlock)
|
|
deletedTxs = append(deletedTxs, oldBlock.Transactions()...)
|
|
collectLogs(oldBlock.Hash())
|
|
|
|
oldBlock, newBlock = bc.GetBlock(oldBlock.ParentHash(), oldBlock.NumberU64()-1), bc.GetBlock(newBlock.ParentHash(), newBlock.NumberU64()-1)
|
|
if oldBlock == nil {
|
|
return fmt.Errorf("Invalid old chain")
|
|
}
|
|
if newBlock == nil {
|
|
return fmt.Errorf("Invalid new chain")
|
|
}
|
|
}
|
|
// Ensure the user sees large reorgs
|
|
if len(oldChain) > 0 && len(newChain) > 0 {
|
|
logFn := log.Debug
|
|
if len(oldChain) > 63 {
|
|
logFn = log.Warn
|
|
}
|
|
logFn("Chain split detected", "number", commonBlock.Number(), "hash", commonBlock.Hash(),
|
|
"drop", len(oldChain), "dropfrom", oldChain[0].Hash(), "add", len(newChain), "addfrom", newChain[0].Hash())
|
|
} else {
|
|
log.Error("Impossible reorg, please file an issue", "oldnum", oldBlock.Number(), "oldhash", oldBlock.Hash(), "newnum", newBlock.Number(), "newhash", newBlock.Hash())
|
|
}
|
|
// Insert the new chain, taking care of the proper incremental order
|
|
var addedTxs types.Transactions
|
|
for i := len(newChain) - 1; i >= 0; i-- {
|
|
// insert the block in the canonical way, re-writing history
|
|
bc.insert(newChain[i])
|
|
// write lookup entries for hash based transaction/receipt searches
|
|
rawdb.WriteTxLookupEntries(bc.db, newChain[i])
|
|
addedTxs = append(addedTxs, newChain[i].Transactions()...)
|
|
}
|
|
// calculate the difference between deleted and added transactions
|
|
diff := types.TxDifference(deletedTxs, addedTxs)
|
|
// When transactions get deleted from the database that means the
|
|
// receipts that were created in the fork must also be deleted
|
|
batch := bc.db.NewBatch()
|
|
for _, tx := range diff {
|
|
rawdb.DeleteTxLookupEntry(batch, tx.Hash())
|
|
}
|
|
batch.Write()
|
|
|
|
if len(deletedLogs) > 0 {
|
|
go bc.rmLogsFeed.Send(RemovedLogsEvent{deletedLogs})
|
|
}
|
|
if len(oldChain) > 0 {
|
|
go func() {
|
|
for _, block := range oldChain {
|
|
bc.chainSideFeed.Send(ChainSideEvent{Block: block})
|
|
}
|
|
}()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// PostChainEvents iterates over the events generated by a chain insertion and
|
|
// posts them into the event feed.
|
|
// TODO: Should not expose PostChainEvents. The chain events should be posted in WriteBlock.
|
|
func (bc *BlockChain) PostChainEvents(events []interface{}, logs []*types.Log) {
|
|
// post event logs for further processing
|
|
if logs != nil {
|
|
bc.logsFeed.Send(logs)
|
|
}
|
|
for _, event := range events {
|
|
switch ev := event.(type) {
|
|
case ChainEvent:
|
|
bc.chainFeed.Send(ev)
|
|
|
|
case ChainHeadEvent:
|
|
bc.chainHeadFeed.Send(ev)
|
|
|
|
case ChainSideEvent:
|
|
bc.chainSideFeed.Send(ev)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (bc *BlockChain) update() {
|
|
futureTimer := time.NewTicker(5 * time.Second)
|
|
defer futureTimer.Stop()
|
|
for {
|
|
select {
|
|
case <-futureTimer.C:
|
|
bc.procFutureBlocks()
|
|
case <-bc.quit:
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// BadBlocks returns a list of the last 'bad blocks' that the client has seen on the network
|
|
func (bc *BlockChain) BadBlocks() []*types.Block {
|
|
blocks := make([]*types.Block, 0, bc.badBlocks.Len())
|
|
for _, hash := range bc.badBlocks.Keys() {
|
|
if blk, exist := bc.badBlocks.Peek(hash); exist {
|
|
block := blk.(*types.Block)
|
|
blocks = append(blocks, block)
|
|
}
|
|
}
|
|
return blocks
|
|
}
|
|
|
|
// addBadBlock adds a bad block to the bad-block LRU cache
|
|
func (bc *BlockChain) addBadBlock(block *types.Block) {
|
|
bc.badBlocks.Add(block.Hash(), block)
|
|
}
|
|
|
|
// reportBlock logs a bad block error.
|
|
func (bc *BlockChain) reportBlock(block *types.Block, receipts types.Receipts, err error) {
|
|
bc.addBadBlock(block)
|
|
|
|
var receiptString string
|
|
for i, receipt := range receipts {
|
|
receiptString += fmt.Sprintf("\t %d: cumulative: %v gas: %v contract: %v status: %v tx: %v logs: %v bloom: %x state: %x\n",
|
|
i, receipt.CumulativeGasUsed, receipt.GasUsed, receipt.ContractAddress.Hex(),
|
|
receipt.Status, receipt.TxHash.Hex(), receipt.Logs, receipt.Bloom, receipt.PostState)
|
|
}
|
|
log.Error(fmt.Sprintf(`
|
|
########## BAD BLOCK #########
|
|
Chain config: %v
|
|
|
|
Number: %v
|
|
Hash: 0x%x
|
|
%v
|
|
|
|
Error: %v
|
|
##############################
|
|
`, bc.chainConfig, block.Number(), block.Hash(), receiptString, err))
|
|
}
|
|
|
|
// InsertHeaderChain attempts to insert the given header chain in to the local
|
|
// chain, possibly creating a reorg. If an error is returned, it will return the
|
|
// index number of the failing header as well an error describing what went wrong.
|
|
//
|
|
// The verify parameter can be used to fine tune whether nonce verification
|
|
// should be done or not. The reason behind the optional check is because some
|
|
// of the header retrieval mechanisms already need to verify nonces, as well as
|
|
// because nonces can be verified sparsely, not needing to check each.
|
|
func (bc *BlockChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
|
|
start := time.Now()
|
|
if i, err := bc.hc.ValidateHeaderChain(chain, checkFreq); err != nil {
|
|
return i, err
|
|
}
|
|
|
|
// Make sure only one thread manipulates the chain at once
|
|
bc.chainmu.Lock()
|
|
defer bc.chainmu.Unlock()
|
|
|
|
bc.wg.Add(1)
|
|
defer bc.wg.Done()
|
|
|
|
whFunc := func(header *types.Header) error {
|
|
_, err := bc.hc.WriteHeader(header)
|
|
return err
|
|
}
|
|
return bc.hc.InsertHeaderChain(chain, whFunc, start)
|
|
}
|
|
|
|
// CurrentHeader retrieves the current head header of the canonical chain. The
|
|
// header is retrieved from the HeaderChain's internal cache.
|
|
func (bc *BlockChain) CurrentHeader() *types.Header {
|
|
return bc.hc.CurrentHeader()
|
|
}
|
|
|
|
// GetTd retrieves a block's total difficulty in the canonical chain from the
|
|
// database by hash and number, caching it if found.
|
|
func (bc *BlockChain) GetTd(hash common.Hash, number uint64) *big.Int {
|
|
return bc.hc.GetTd(hash, number)
|
|
}
|
|
|
|
// GetTdByHash retrieves a block's total difficulty in the canonical chain from the
|
|
// database by hash, caching it if found.
|
|
func (bc *BlockChain) GetTdByHash(hash common.Hash) *big.Int {
|
|
return bc.hc.GetTdByHash(hash)
|
|
}
|
|
|
|
// GetHeader retrieves a block header from the database by hash and number,
|
|
// caching it if found.
|
|
func (bc *BlockChain) GetHeader(hash common.Hash, number uint64) *types.Header {
|
|
return bc.hc.GetHeader(hash, number)
|
|
}
|
|
|
|
// GetHeaderByHash retrieves a block header from the database by hash, caching it if
|
|
// found.
|
|
func (bc *BlockChain) GetHeaderByHash(hash common.Hash) *types.Header {
|
|
return bc.hc.GetHeaderByHash(hash)
|
|
}
|
|
|
|
// HasHeader checks if a block header is present in the database or not, caching
|
|
// it if present.
|
|
func (bc *BlockChain) HasHeader(hash common.Hash, number uint64) bool {
|
|
return bc.hc.HasHeader(hash, number)
|
|
}
|
|
|
|
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
|
|
// hash, fetching towards the genesis block.
|
|
func (bc *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
|
|
return bc.hc.GetBlockHashesFromHash(hash, max)
|
|
}
|
|
|
|
// GetAncestor retrieves the Nth ancestor of a given block. It assumes that either the given block or
|
|
// a close ancestor of it is canonical. maxNonCanonical points to a downwards counter limiting the
|
|
// number of blocks to be individually checked before we reach the canonical chain.
|
|
//
|
|
// Note: ancestor == 0 returns the same block, 1 returns its parent and so on.
|
|
func (bc *BlockChain) GetAncestor(hash common.Hash, number, ancestor uint64, maxNonCanonical *uint64) (common.Hash, uint64) {
|
|
bc.chainmu.RLock()
|
|
defer bc.chainmu.RUnlock()
|
|
|
|
return bc.hc.GetAncestor(hash, number, ancestor, maxNonCanonical)
|
|
}
|
|
|
|
// GetHeaderByNumber retrieves a block header from the database by number,
|
|
// caching it (associated with its hash) if found.
|
|
func (bc *BlockChain) GetHeaderByNumber(number uint64) *types.Header {
|
|
return bc.hc.GetHeaderByNumber(number)
|
|
}
|
|
|
|
// Config retrieves the blockchain's chain configuration.
|
|
func (bc *BlockChain) Config() *params.ChainConfig { return bc.chainConfig }
|
|
|
|
// Engine retrieves the blockchain's consensus engine.
|
|
func (bc *BlockChain) Engine() consensus.Engine { return bc.engine }
|
|
|
|
// SubscribeRemovedLogsEvent registers a subscription of RemovedLogsEvent.
|
|
func (bc *BlockChain) SubscribeRemovedLogsEvent(ch chan<- RemovedLogsEvent) event.Subscription {
|
|
return bc.scope.Track(bc.rmLogsFeed.Subscribe(ch))
|
|
}
|
|
|
|
// SubscribeChainEvent registers a subscription of ChainEvent.
|
|
func (bc *BlockChain) SubscribeChainEvent(ch chan<- ChainEvent) event.Subscription {
|
|
return bc.scope.Track(bc.chainFeed.Subscribe(ch))
|
|
}
|
|
|
|
// SubscribeChainHeadEvent registers a subscription of ChainHeadEvent.
|
|
func (bc *BlockChain) SubscribeChainHeadEvent(ch chan<- ChainHeadEvent) event.Subscription {
|
|
return bc.scope.Track(bc.chainHeadFeed.Subscribe(ch))
|
|
}
|
|
|
|
// SubscribeChainSideEvent registers a subscription of ChainSideEvent.
|
|
func (bc *BlockChain) SubscribeChainSideEvent(ch chan<- ChainSideEvent) event.Subscription {
|
|
return bc.scope.Track(bc.chainSideFeed.Subscribe(ch))
|
|
}
|
|
|
|
// SubscribeLogsEvent registers a subscription of []*types.Log.
|
|
func (bc *BlockChain) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
|
|
return bc.scope.Track(bc.logsFeed.Subscribe(ch))
|
|
}
|