mirror of https://github.com/poanetwork/quorum.git
1294 lines
43 KiB
Go
1294 lines
43 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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"runtime"
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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/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/logger"
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"github.com/ethereum/go-ethereum/logger/glog"
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"github.com/ethereum/go-ethereum/metrics"
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"github.com/ethereum/go-ethereum/pow"
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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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chainlogger = logger.NewLogger("CHAIN")
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jsonlogger = logger.NewJsonLogger()
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blockInsertTimer = metrics.NewTimer("chain/inserts")
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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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maxFutureBlocks = 256
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maxTimeFutureBlocks = 30
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// must be bumped when consensus algorithm is changed, this forces the upgradedb
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// command to be run (forces the blocks to be imported again using the new algorithm)
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BlockChainVersion = 3
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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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config *ChainConfig // chain & network configuration
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hc *HeaderChain
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chainDb ethdb.Database
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eventMux *event.TypeMux
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genesisBlock *types.Block
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mu sync.RWMutex // global mutex for locking chain operations
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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 *types.Block // Current head of the block chain
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currentFastBlock *types.Block // Current head of the fast-sync chain (may be above the block chain!)
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stateCache *state.StateDB // 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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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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pow pow.PoW
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processor Processor // block processor interface
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validator Validator // block and state validator interface
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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 initialiser the default Ethereum Validator and
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// Processor.
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func NewBlockChain(chainDb ethdb.Database, config *ChainConfig, pow pow.PoW, mux *event.TypeMux) (*BlockChain, error) {
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bodyCache, _ := lru.New(bodyCacheLimit)
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bodyRLPCache, _ := lru.New(bodyCacheLimit)
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blockCache, _ := lru.New(blockCacheLimit)
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futureBlocks, _ := lru.New(maxFutureBlocks)
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bc := &BlockChain{
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config: config,
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chainDb: chainDb,
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eventMux: mux,
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quit: make(chan struct{}),
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bodyCache: bodyCache,
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bodyRLPCache: bodyRLPCache,
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blockCache: blockCache,
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futureBlocks: futureBlocks,
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pow: pow,
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}
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bc.SetValidator(NewBlockValidator(config, bc, pow))
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bc.SetProcessor(NewStateProcessor(config, bc))
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gv := func() HeaderValidator { return bc.Validator() }
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var err error
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bc.hc, err = NewHeaderChain(chainDb, config, gv, 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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glog.V(logger.Error).Infof("Found bad hash, rewinding chain to block #%d [%x…]", header.Number, header.ParentHash[:4])
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bc.SetHead(header.Number.Uint64() - 1)
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glog.V(logger.Error).Infoln("Chain rewind was successful, resuming normal operation")
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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 (self *BlockChain) getProcInterrupt() bool {
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return atomic.LoadInt32(&self.procInterrupt) == 1
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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 (self *BlockChain) loadLastState() error {
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// Restore the last known head block
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head := GetHeadBlockHash(self.chainDb)
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if head == (common.Hash{}) {
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// Corrupt or empty database, init from scratch
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self.Reset()
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} else {
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if block := self.GetBlockByHash(head); block != nil {
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// Block found, set as the current head
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self.currentBlock = block
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} else {
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// Corrupt or empty database, init from scratch
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self.Reset()
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}
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}
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// Restore the last known head header
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currentHeader := self.currentBlock.Header()
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if head := GetHeadHeaderHash(self.chainDb); head != (common.Hash{}) {
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if header := self.GetHeaderByHash(head); header != nil {
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currentHeader = header
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}
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}
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self.hc.SetCurrentHeader(currentHeader)
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// Restore the last known head fast block
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self.currentFastBlock = self.currentBlock
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if head := GetHeadFastBlockHash(self.chainDb); head != (common.Hash{}) {
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if block := self.GetBlockByHash(head); block != nil {
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self.currentFastBlock = block
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}
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}
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// Initialize a statedb cache to ensure singleton account bloom filter generation
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statedb, err := state.New(self.currentBlock.Root(), self.chainDb)
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if err != nil {
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return err
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}
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self.stateCache = statedb
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self.stateCache.GetAccount(common.Address{})
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// Issue a status log for the user
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headerTd := self.GetTd(currentHeader.Hash(), currentHeader.Number.Uint64())
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blockTd := self.GetTd(self.currentBlock.Hash(), self.currentBlock.NumberU64())
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fastTd := self.GetTd(self.currentFastBlock.Hash(), self.currentFastBlock.NumberU64())
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glog.V(logger.Info).Infof("Last header: #%d [%x…] TD=%v", currentHeader.Number, currentHeader.Hash().Bytes()[:4], headerTd)
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glog.V(logger.Info).Infof("Last block: #%d [%x…] TD=%v", self.currentBlock.Number(), self.currentBlock.Hash().Bytes()[:4], blockTd)
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glog.V(logger.Info).Infof("Fast block: #%d [%x…] TD=%v", self.currentFastBlock.Number(), self.currentFastBlock.Hash().Bytes()[:4], fastTd)
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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) {
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bc.mu.Lock()
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defer bc.mu.Unlock()
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delFn := func(hash common.Hash, num uint64) {
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DeleteBody(bc.chainDb, hash, num)
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}
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bc.hc.SetHead(head, delFn)
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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.blockCache.Purge()
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bc.futureBlocks.Purge()
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// Update all computed fields to the new head
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currentHeader := bc.hc.CurrentHeader()
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if bc.currentBlock != nil && currentHeader.Number.Uint64() < bc.currentBlock.NumberU64() {
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bc.currentBlock = bc.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64())
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}
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if bc.currentFastBlock != nil && currentHeader.Number.Uint64() < bc.currentFastBlock.NumberU64() {
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bc.currentFastBlock = bc.GetBlock(currentHeader.Hash(), currentHeader.Number.Uint64())
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}
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if bc.currentBlock == nil {
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bc.currentBlock = bc.genesisBlock
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}
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if bc.currentFastBlock == nil {
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bc.currentFastBlock = bc.genesisBlock
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}
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if err := WriteHeadBlockHash(bc.chainDb, bc.currentBlock.Hash()); err != nil {
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glog.Fatalf("failed to reset head block hash: %v", err)
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}
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if err := WriteHeadFastBlockHash(bc.chainDb, bc.currentFastBlock.Hash()); err != nil {
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glog.Fatalf("failed to reset head fast block hash: %v", err)
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}
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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 (self *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 := self.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(), self.chainDb, 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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self.mu.Lock()
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self.currentBlock = block
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self.mu.Unlock()
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glog.V(logger.Info).Infof("committed block #%d [%x…] as new head", block.Number(), hash[:4])
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return nil
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}
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// GasLimit returns the gas limit of the current HEAD block.
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func (self *BlockChain) GasLimit() *big.Int {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentBlock.GasLimit()
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}
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// LastBlockHash return the hash of the HEAD block.
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func (self *BlockChain) LastBlockHash() common.Hash {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentBlock.Hash()
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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 (self *BlockChain) CurrentBlock() *types.Block {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentBlock
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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.
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func (self *BlockChain) CurrentFastBlock() *types.Block {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.currentFastBlock
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}
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// Status returns status information about the current chain such as the HEAD Td,
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// the HEAD hash and the hash of the genesis block.
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func (self *BlockChain) Status() (td *big.Int, currentBlock common.Hash, genesisBlock common.Hash) {
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self.mu.RLock()
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defer self.mu.RUnlock()
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return self.GetTd(self.currentBlock.Hash(), self.currentBlock.NumberU64()), self.currentBlock.Hash(), self.genesisBlock.Hash()
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}
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// SetProcessor sets the processor required for making state modifications.
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func (self *BlockChain) SetProcessor(processor Processor) {
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self.procmu.Lock()
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defer self.procmu.Unlock()
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self.processor = processor
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}
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// SetValidator sets the validator which is used to validate incoming blocks.
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func (self *BlockChain) SetValidator(validator Validator) {
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self.procmu.Lock()
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defer self.procmu.Unlock()
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self.validator = validator
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}
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// Validator returns the current validator.
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func (self *BlockChain) Validator() Validator {
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self.procmu.RLock()
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defer self.procmu.RUnlock()
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return self.validator
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}
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// Processor returns the current processor.
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func (self *BlockChain) Processor() Processor {
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self.procmu.RLock()
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defer self.procmu.RUnlock()
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return self.processor
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}
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// AuxValidator returns the auxiliary validator (Proof of work atm)
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func (self *BlockChain) AuxValidator() pow.PoW { return self.pow }
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// State returns a new mutable state based on the current HEAD block.
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func (self *BlockChain) State() (*state.StateDB, error) {
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return self.StateAt(self.CurrentBlock().Root())
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}
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// StateAt returns a new mutable state based on a particular point in time.
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func (self *BlockChain) StateAt(root common.Hash) (*state.StateDB, error) {
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return self.stateCache.New(root)
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}
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// Reset purges the entire blockchain, restoring it to its genesis state.
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func (bc *BlockChain) Reset() {
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bc.ResetWithGenesisBlock(bc.genesisBlock)
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}
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// ResetWithGenesisBlock purges the entire blockchain, restoring it to the
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// specified genesis state.
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func (bc *BlockChain) ResetWithGenesisBlock(genesis *types.Block) {
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// Dump the entire block chain and purge the caches
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bc.SetHead(0)
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bc.mu.Lock()
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defer bc.mu.Unlock()
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// Prepare the genesis block and reinitialise the chain
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if err := bc.hc.WriteTd(genesis.Hash(), genesis.NumberU64(), genesis.Difficulty()); err != nil {
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glog.Fatalf("failed to write genesis block TD: %v", err)
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}
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if err := WriteBlock(bc.chainDb, genesis); err != nil {
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glog.Fatalf("failed to write genesis block: %v", err)
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}
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bc.genesisBlock = genesis
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bc.insert(bc.genesisBlock)
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bc.currentBlock = bc.genesisBlock
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bc.hc.SetGenesis(bc.genesisBlock.Header())
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bc.hc.SetCurrentHeader(bc.genesisBlock.Header())
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bc.currentFastBlock = bc.genesisBlock
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}
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// Export writes the active chain to the given writer.
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func (self *BlockChain) Export(w io.Writer) error {
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if err := self.ExportN(w, uint64(0), self.currentBlock.NumberU64()); err != nil {
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return err
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}
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return nil
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}
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// ExportN writes a subset of the active chain to the given writer.
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func (self *BlockChain) ExportN(w io.Writer, first uint64, last uint64) error {
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self.mu.RLock()
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defer self.mu.RUnlock()
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if first > last {
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return fmt.Errorf("export failed: first (%d) is greater than last (%d)", first, last)
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}
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glog.V(logger.Info).Infof("exporting %d blocks...\n", last-first+1)
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for nr := first; nr <= last; nr++ {
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block := self.GetBlockByNumber(nr)
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if block == nil {
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return fmt.Errorf("export failed on #%d: not found", nr)
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}
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if err := block.EncodeRLP(w); err != nil {
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return err
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}
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}
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return nil
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}
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// insert injects a new head block into the current block chain. This method
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// assumes that the block is indeed a true head. It will also reset the head
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// header and the head fast sync block to this very same block if they are older
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// or if they are on a different side chain.
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//
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// Note, this function assumes that the `mu` mutex is held!
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func (bc *BlockChain) insert(block *types.Block) {
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// If the block is on a side chain or an unknown one, force other heads onto it too
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updateHeads := GetCanonicalHash(bc.chainDb, block.NumberU64()) != block.Hash()
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// Add the block to the canonical chain number scheme and mark as the head
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if err := WriteCanonicalHash(bc.chainDb, block.Hash(), block.NumberU64()); err != nil {
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glog.Fatalf("failed to insert block number: %v", err)
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}
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if err := WriteHeadBlockHash(bc.chainDb, block.Hash()); err != nil {
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glog.Fatalf("failed to insert head block hash: %v", err)
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}
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bc.currentBlock = block
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// If the block is better than out head or is on a different chain, force update heads
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if updateHeads {
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bc.hc.SetCurrentHeader(block.Header())
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if err := WriteHeadFastBlockHash(bc.chainDb, block.Hash()); err != nil {
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glog.Fatalf("failed to insert head fast block hash: %v", err)
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}
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bc.currentFastBlock = block
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}
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}
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// Accessors
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func (bc *BlockChain) Genesis() *types.Block {
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return bc.genesisBlock
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}
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// GetBody retrieves a block body (transactions and uncles) from the database by
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// hash, caching it if found.
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func (self *BlockChain) GetBody(hash common.Hash) *types.Body {
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// Short circuit if the body's already in the cache, retrieve otherwise
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if cached, ok := self.bodyCache.Get(hash); ok {
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body := cached.(*types.Body)
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return body
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}
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body := GetBody(self.chainDb, hash, self.hc.GetBlockNumber(hash))
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if body == nil {
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return nil
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}
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// Cache the found body for next time and return
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self.bodyCache.Add(hash, body)
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return body
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}
|
|
|
|
// GetBodyRLP retrieves a block body in RLP encoding from the database by hash,
|
|
// caching it if found.
|
|
func (self *BlockChain) GetBodyRLP(hash common.Hash) rlp.RawValue {
|
|
// Short circuit if the body's already in the cache, retrieve otherwise
|
|
if cached, ok := self.bodyRLPCache.Get(hash); ok {
|
|
return cached.(rlp.RawValue)
|
|
}
|
|
body := GetBodyRLP(self.chainDb, hash, self.hc.GetBlockNumber(hash))
|
|
if len(body) == 0 {
|
|
return nil
|
|
}
|
|
// Cache the found body for next time and return
|
|
self.bodyRLPCache.Add(hash, body)
|
|
return body
|
|
}
|
|
|
|
// HasBlock checks if a block is fully present in the database or not, caching
|
|
// it if present.
|
|
func (bc *BlockChain) HasBlock(hash common.Hash) bool {
|
|
return bc.GetBlockByHash(hash) != 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) bool {
|
|
// Check first that the block itself is known
|
|
block := bc.GetBlockByHash(hash)
|
|
if block == nil {
|
|
return false
|
|
}
|
|
// Ensure the associated state is also present
|
|
_, err := state.New(block.Root(), bc.chainDb)
|
|
return err == nil
|
|
}
|
|
|
|
// GetBlock retrieves a block from the database by hash and number,
|
|
// caching it if found.
|
|
func (self *BlockChain) GetBlock(hash common.Hash, number uint64) *types.Block {
|
|
// Short circuit if the block's already in the cache, retrieve otherwise
|
|
if block, ok := self.blockCache.Get(hash); ok {
|
|
return block.(*types.Block)
|
|
}
|
|
block := GetBlock(self.chainDb, hash, number)
|
|
if block == nil {
|
|
return nil
|
|
}
|
|
// Cache the found block for next time and return
|
|
self.blockCache.Add(block.Hash(), block)
|
|
return block
|
|
}
|
|
|
|
// GetBlockByHash retrieves a block from the database by hash, caching it if found.
|
|
func (self *BlockChain) GetBlockByHash(hash common.Hash) *types.Block {
|
|
return self.GetBlock(hash, self.hc.GetBlockNumber(hash))
|
|
}
|
|
|
|
// GetBlockByNumber retrieves a block from the database by number, caching it
|
|
// (associated with its hash) if found.
|
|
func (self *BlockChain) GetBlockByNumber(number uint64) *types.Block {
|
|
hash := GetCanonicalHash(self.chainDb, number)
|
|
if hash == (common.Hash{}) {
|
|
return nil
|
|
}
|
|
return self.GetBlock(hash, number)
|
|
}
|
|
|
|
// [deprecated by eth/62]
|
|
// GetBlocksFromHash returns the block corresponding to hash and up to n-1 ancestors.
|
|
func (self *BlockChain) GetBlocksFromHash(hash common.Hash, n int) (blocks []*types.Block) {
|
|
number := self.hc.GetBlockNumber(hash)
|
|
for i := 0; i < n; i++ {
|
|
block := self.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 (self *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 = self.GetBlock(block.ParentHash(), block.NumberU64()-1)
|
|
}
|
|
return uncles
|
|
}
|
|
|
|
// 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
|
|
}
|
|
close(bc.quit)
|
|
atomic.StoreInt32(&bc.procInterrupt, 1)
|
|
|
|
bc.wg.Wait()
|
|
|
|
glog.V(logger.Info).Infoln("Chain manager stopped")
|
|
}
|
|
|
|
func (self *BlockChain) procFutureBlocks() {
|
|
blocks := make([]*types.Block, 0, self.futureBlocks.Len())
|
|
for _, hash := range self.futureBlocks.Keys() {
|
|
if block, exist := self.futureBlocks.Get(hash); exist {
|
|
blocks = append(blocks, block.(*types.Block))
|
|
}
|
|
}
|
|
if len(blocks) > 0 {
|
|
types.BlockBy(types.Number).Sort(blocks)
|
|
self.InsertChain(blocks)
|
|
}
|
|
}
|
|
|
|
type WriteStatus byte
|
|
|
|
const (
|
|
NonStatTy WriteStatus = iota
|
|
CanonStatTy
|
|
SplitStatTy
|
|
SideStatTy
|
|
)
|
|
|
|
// Rollback is designed to remove a chain of links from the database that aren't
|
|
// certain enough to be valid.
|
|
func (self *BlockChain) Rollback(chain []common.Hash) {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
for i := len(chain) - 1; i >= 0; i-- {
|
|
hash := chain[i]
|
|
|
|
currentHeader := self.hc.CurrentHeader()
|
|
if currentHeader.Hash() == hash {
|
|
self.hc.SetCurrentHeader(self.GetHeader(currentHeader.ParentHash, currentHeader.Number.Uint64()-1))
|
|
}
|
|
if self.currentFastBlock.Hash() == hash {
|
|
self.currentFastBlock = self.GetBlock(self.currentFastBlock.ParentHash(), self.currentFastBlock.NumberU64()-1)
|
|
WriteHeadFastBlockHash(self.chainDb, self.currentFastBlock.Hash())
|
|
}
|
|
if self.currentBlock.Hash() == hash {
|
|
self.currentBlock = self.GetBlock(self.currentBlock.ParentHash(), self.currentBlock.NumberU64()-1)
|
|
WriteHeadBlockHash(self.chainDb, self.currentBlock.Hash())
|
|
}
|
|
}
|
|
}
|
|
|
|
// InsertReceiptChain attempts to complete an already existing header chain with
|
|
// transaction and receipt data.
|
|
func (self *BlockChain) InsertReceiptChain(blockChain types.Blocks, receiptChain []types.Receipts) (int, error) {
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
// Collect some import statistics to report on
|
|
stats := struct{ processed, ignored int32 }{}
|
|
start := time.Now()
|
|
|
|
// Create the block importing task queue and worker functions
|
|
tasks := make(chan int, len(blockChain))
|
|
for i := 0; i < len(blockChain) && i < len(receiptChain); i++ {
|
|
tasks <- i
|
|
}
|
|
close(tasks)
|
|
|
|
errs, failed := make([]error, len(tasks)), int32(0)
|
|
process := func(worker int) {
|
|
for index := range tasks {
|
|
block, receipts := blockChain[index], receiptChain[index]
|
|
|
|
// Short circuit insertion if shutting down or processing failed
|
|
if atomic.LoadInt32(&self.procInterrupt) == 1 {
|
|
return
|
|
}
|
|
if atomic.LoadInt32(&failed) > 0 {
|
|
return
|
|
}
|
|
// Short circuit if the owner header is unknown
|
|
if !self.HasHeader(block.Hash()) {
|
|
errs[index] = fmt.Errorf("containing header #%d [%x…] unknown", block.Number(), block.Hash().Bytes()[:4])
|
|
atomic.AddInt32(&failed, 1)
|
|
return
|
|
}
|
|
// Skip if the entire data is already known
|
|
if self.HasBlock(block.Hash()) {
|
|
atomic.AddInt32(&stats.ignored, 1)
|
|
continue
|
|
}
|
|
// Compute all the non-consensus fields of the receipts
|
|
transactions, logIndex := block.Transactions(), uint(0)
|
|
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 MessageCreatesContract(transactions[j]) {
|
|
from, _ := transactions[j].From()
|
|
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 = new(big.Int).Set(receipts[j].CumulativeGasUsed)
|
|
} else {
|
|
receipts[j].GasUsed = new(big.Int).Sub(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++
|
|
}
|
|
}
|
|
// Write all the data out into the database
|
|
if err := WriteBody(self.chainDb, block.Hash(), block.NumberU64(), block.Body()); err != nil {
|
|
errs[index] = fmt.Errorf("failed to write block body: %v", err)
|
|
atomic.AddInt32(&failed, 1)
|
|
glog.Fatal(errs[index])
|
|
return
|
|
}
|
|
if err := WriteBlockReceipts(self.chainDb, block.Hash(), block.NumberU64(), receipts); err != nil {
|
|
errs[index] = fmt.Errorf("failed to write block receipts: %v", err)
|
|
atomic.AddInt32(&failed, 1)
|
|
glog.Fatal(errs[index])
|
|
return
|
|
}
|
|
if err := WriteMipmapBloom(self.chainDb, block.NumberU64(), receipts); err != nil {
|
|
errs[index] = fmt.Errorf("failed to write log blooms: %v", err)
|
|
atomic.AddInt32(&failed, 1)
|
|
glog.Fatal(errs[index])
|
|
return
|
|
}
|
|
if err := WriteTransactions(self.chainDb, block); err != nil {
|
|
errs[index] = fmt.Errorf("failed to write individual transactions: %v", err)
|
|
atomic.AddInt32(&failed, 1)
|
|
glog.Fatal(errs[index])
|
|
return
|
|
}
|
|
if err := WriteReceipts(self.chainDb, receipts); err != nil {
|
|
errs[index] = fmt.Errorf("failed to write individual receipts: %v", err)
|
|
atomic.AddInt32(&failed, 1)
|
|
glog.Fatal(errs[index])
|
|
return
|
|
}
|
|
atomic.AddInt32(&stats.processed, 1)
|
|
}
|
|
}
|
|
// Start as many worker threads as goroutines allowed
|
|
pending := new(sync.WaitGroup)
|
|
for i := 0; i < runtime.GOMAXPROCS(0); i++ {
|
|
pending.Add(1)
|
|
go func(id int) {
|
|
defer pending.Done()
|
|
process(id)
|
|
}(i)
|
|
}
|
|
pending.Wait()
|
|
|
|
// If anything failed, report
|
|
if failed > 0 {
|
|
for i, err := range errs {
|
|
if err != nil {
|
|
return i, err
|
|
}
|
|
}
|
|
}
|
|
if atomic.LoadInt32(&self.procInterrupt) == 1 {
|
|
glog.V(logger.Debug).Infoln("premature abort during receipt chain processing")
|
|
return 0, nil
|
|
}
|
|
// Update the head fast sync block if better
|
|
self.mu.Lock()
|
|
head := blockChain[len(errs)-1]
|
|
if self.GetTd(self.currentFastBlock.Hash(), self.currentFastBlock.NumberU64()).Cmp(self.GetTd(head.Hash(), head.NumberU64())) < 0 {
|
|
if err := WriteHeadFastBlockHash(self.chainDb, head.Hash()); err != nil {
|
|
glog.Fatalf("failed to update head fast block hash: %v", err)
|
|
}
|
|
self.currentFastBlock = head
|
|
}
|
|
self.mu.Unlock()
|
|
|
|
// Report some public statistics so the user has a clue what's going on
|
|
first, last := blockChain[0], blockChain[len(blockChain)-1]
|
|
|
|
ignored := ""
|
|
if stats.ignored > 0 {
|
|
ignored = fmt.Sprintf(" (%d ignored)", stats.ignored)
|
|
}
|
|
glog.V(logger.Info).Infof("imported %d receipts%s in %9v. #%d [%x… / %x…]", stats.processed, ignored, common.PrettyDuration(time.Since(start)), last.Number(), first.Hash().Bytes()[:4], last.Hash().Bytes()[:4])
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
// WriteBlock writes the block to the chain.
|
|
func (self *BlockChain) WriteBlock(block *types.Block) (status WriteStatus, err error) {
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
// Calculate the total difficulty of the block
|
|
ptd := self.GetTd(block.ParentHash(), block.NumberU64()-1)
|
|
if ptd == nil {
|
|
return NonStatTy, ParentError(block.ParentHash())
|
|
}
|
|
// Make sure no inconsistent state is leaked during insertion
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
localTd := self.GetTd(self.currentBlock.Hash(), self.currentBlock.NumberU64())
|
|
externTd := new(big.Int).Add(block.Difficulty(), ptd)
|
|
|
|
// Irrelevant of the canonical status, write the block itself to the database
|
|
if err := self.hc.WriteTd(block.Hash(), block.NumberU64(), externTd); err != nil {
|
|
glog.Fatalf("failed to write block total difficulty: %v", err)
|
|
}
|
|
if err := WriteBlock(self.chainDb, block); err != nil {
|
|
glog.Fatalf("failed to write block contents: %v", err)
|
|
}
|
|
|
|
// 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
|
|
if externTd.Cmp(localTd) > 0 || (externTd.Cmp(localTd) == 0 && mrand.Float64() < 0.5) {
|
|
// Reorganise the chain if the parent is not the head block
|
|
if block.ParentHash() != self.currentBlock.Hash() {
|
|
if err := self.reorg(self.currentBlock, block); err != nil {
|
|
return NonStatTy, err
|
|
}
|
|
}
|
|
self.insert(block) // Insert the block as the new head of the chain
|
|
status = CanonStatTy
|
|
} else {
|
|
status = SideStatTy
|
|
}
|
|
|
|
self.futureBlocks.Remove(block.Hash())
|
|
|
|
return
|
|
}
|
|
|
|
// InsertChain will attempt to insert the given chain in to the canonical chain or, otherwise, create a fork. It an error is returned
|
|
// it will return the index number of the failing block as well an error describing what went wrong (for possible errors see core/errors.go).
|
|
func (self *BlockChain) InsertChain(chain types.Blocks) (int, error) {
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
self.chainmu.Lock()
|
|
defer self.chainmu.Unlock()
|
|
|
|
// A queued approach to delivering events. This is generally
|
|
// faster than direct delivery and requires much less mutex
|
|
// acquiring.
|
|
var (
|
|
stats = insertStats{startTime: time.Now()}
|
|
events = make([]interface{}, 0, len(chain))
|
|
coalescedLogs vm.Logs
|
|
nonceChecked = make([]bool, len(chain))
|
|
)
|
|
|
|
// Start the parallel nonce verifier.
|
|
nonceAbort, nonceResults := verifyNoncesFromBlocks(self.pow, chain)
|
|
defer close(nonceAbort)
|
|
|
|
for i, block := range chain {
|
|
if atomic.LoadInt32(&self.procInterrupt) == 1 {
|
|
glog.V(logger.Debug).Infoln("Premature abort during block chain processing")
|
|
break
|
|
}
|
|
|
|
bstart := time.Now()
|
|
// Wait for block i's nonce to be verified before processing
|
|
// its state transition.
|
|
for !nonceChecked[i] {
|
|
r := <-nonceResults
|
|
nonceChecked[r.index] = true
|
|
if !r.valid {
|
|
block := chain[r.index]
|
|
return r.index, &BlockNonceErr{Hash: block.Hash(), Number: block.Number(), Nonce: block.Nonce()}
|
|
}
|
|
}
|
|
|
|
if BadHashes[block.Hash()] {
|
|
err := BadHashError(block.Hash())
|
|
reportBlock(block, err)
|
|
return i, err
|
|
}
|
|
// Stage 1 validation of the block using the chain's validator
|
|
// interface.
|
|
err := self.Validator().ValidateBlock(block)
|
|
if err != nil {
|
|
if IsKnownBlockErr(err) {
|
|
stats.ignored++
|
|
continue
|
|
}
|
|
|
|
if err == BlockFutureErr {
|
|
// Allow up to MaxFuture second in the future blocks. If this limit
|
|
// is exceeded the chain is discarded and processed at a later time
|
|
// if given.
|
|
max := big.NewInt(time.Now().Unix() + maxTimeFutureBlocks)
|
|
if block.Time().Cmp(max) == 1 {
|
|
return i, fmt.Errorf("%v: BlockFutureErr, %v > %v", BlockFutureErr, block.Time(), max)
|
|
}
|
|
|
|
self.futureBlocks.Add(block.Hash(), block)
|
|
stats.queued++
|
|
continue
|
|
}
|
|
|
|
if IsParentErr(err) && self.futureBlocks.Contains(block.ParentHash()) {
|
|
self.futureBlocks.Add(block.Hash(), block)
|
|
stats.queued++
|
|
continue
|
|
}
|
|
|
|
reportBlock(block, err)
|
|
|
|
return i, err
|
|
}
|
|
|
|
// Create a new statedb using the parent block and report an
|
|
// error if it fails.
|
|
switch {
|
|
case i == 0:
|
|
err = self.stateCache.Reset(self.GetBlock(block.ParentHash(), block.NumberU64()-1).Root())
|
|
default:
|
|
err = self.stateCache.Reset(chain[i-1].Root())
|
|
}
|
|
if err != nil {
|
|
reportBlock(block, err)
|
|
return i, err
|
|
}
|
|
// Process block using the parent state as reference point.
|
|
receipts, logs, usedGas, err := self.processor.Process(block, self.stateCache, self.config.VmConfig)
|
|
if err != nil {
|
|
reportBlock(block, err)
|
|
return i, err
|
|
}
|
|
// Validate the state using the default validator
|
|
err = self.Validator().ValidateState(block, self.GetBlock(block.ParentHash(), block.NumberU64()-1), self.stateCache, receipts, usedGas)
|
|
if err != nil {
|
|
reportBlock(block, err)
|
|
return i, err
|
|
}
|
|
// Write state changes to database
|
|
_, err = self.stateCache.Commit()
|
|
if err != nil {
|
|
return i, err
|
|
}
|
|
|
|
// coalesce logs for later processing
|
|
coalescedLogs = append(coalescedLogs, logs...)
|
|
|
|
if err := WriteBlockReceipts(self.chainDb, block.Hash(), block.NumberU64(), receipts); err != nil {
|
|
return i, err
|
|
}
|
|
|
|
// write the block to the chain and get the status
|
|
status, err := self.WriteBlock(block)
|
|
if err != nil {
|
|
return i, err
|
|
}
|
|
|
|
switch status {
|
|
case CanonStatTy:
|
|
if glog.V(logger.Debug) {
|
|
glog.Infof("inserted block #%d [%x…] in %9v: %3d txs %7v gas %d uncles.", block.Number(), block.Hash().Bytes()[0:4], common.PrettyDuration(time.Since(bstart)), len(block.Transactions()), block.GasUsed(), len(block.Uncles()))
|
|
}
|
|
blockInsertTimer.UpdateSince(bstart)
|
|
events = append(events, ChainEvent{block, block.Hash(), logs})
|
|
|
|
// This puts transactions in a extra db for rpc
|
|
if err := WriteTransactions(self.chainDb, block); err != nil {
|
|
return i, err
|
|
}
|
|
// store the receipts
|
|
if err := WriteReceipts(self.chainDb, receipts); err != nil {
|
|
return i, err
|
|
}
|
|
// Write map map bloom filters
|
|
if err := WriteMipmapBloom(self.chainDb, block.NumberU64(), receipts); err != nil {
|
|
return i, err
|
|
}
|
|
case SideStatTy:
|
|
if glog.V(logger.Detail) {
|
|
glog.Infof("inserted forked block #%d [%x…] (TD=%v) in %9v: %3d txs %d uncles.", block.Number(), block.Hash().Bytes()[0:4], block.Difficulty(), common.PrettyDuration(time.Since(bstart)), len(block.Transactions()), len(block.Uncles()))
|
|
}
|
|
blockInsertTimer.UpdateSince(bstart)
|
|
events = append(events, ChainSideEvent{block, logs})
|
|
|
|
case SplitStatTy:
|
|
events = append(events, ChainSplitEvent{block, logs})
|
|
}
|
|
|
|
stats.processed++
|
|
if glog.V(logger.Info) {
|
|
stats.report(chain, i)
|
|
}
|
|
}
|
|
|
|
go self.postChainEvents(events, coalescedLogs)
|
|
|
|
return 0, nil
|
|
}
|
|
|
|
// insertStats tracks and reports on block insertion.
|
|
type insertStats struct {
|
|
queued, processed, ignored int
|
|
lastIndex int
|
|
startTime time.Time
|
|
}
|
|
|
|
// statsReportLimit is the time limit during import after which we always print
|
|
// out progress. This avoids the user wondering what's going on.
|
|
const statsReportLimit = 8 * time.Second
|
|
|
|
// report prints statistics if some number of blocks have been processed
|
|
// or more than a few seconds have passed since the last message.
|
|
func (st *insertStats) report(chain []*types.Block, index int) {
|
|
var (
|
|
now = time.Now()
|
|
elapsed = now.Sub(st.startTime)
|
|
)
|
|
if index == len(chain)-1 || elapsed >= statsReportLimit {
|
|
start, end := chain[st.lastIndex], chain[index]
|
|
txcount := countTransactions(chain[st.lastIndex : index+1])
|
|
|
|
extra := ""
|
|
if st.queued > 0 || st.ignored > 0 {
|
|
extra = fmt.Sprintf(" (%d queued %d ignored)", st.queued, st.ignored)
|
|
}
|
|
glog.Infof("imported %d blocks%s, %5d txs in %9v. #%v [%x… / %x…]\n", st.processed, extra, txcount, common.PrettyDuration(elapsed), end.Number(), start.Hash().Bytes()[:4], end.Hash().Bytes()[:4])
|
|
|
|
*st = insertStats{startTime: now, lastIndex: index}
|
|
}
|
|
}
|
|
|
|
func countTransactions(chain []*types.Block) (c int) {
|
|
for _, b := range chain {
|
|
c += len(b.Transactions())
|
|
}
|
|
return c
|
|
}
|
|
|
|
// 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 (self *BlockChain) reorg(oldBlock, newBlock *types.Block) error {
|
|
var (
|
|
newChain types.Blocks
|
|
oldChain types.Blocks
|
|
commonBlock *types.Block
|
|
oldStart = oldBlock
|
|
newStart = newBlock
|
|
deletedTxs types.Transactions
|
|
deletedLogs vm.Logs
|
|
deletedLogsByHash = make(map[common.Hash]vm.Logs)
|
|
// 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(h common.Hash) {
|
|
// Coalesce logs
|
|
receipts := GetBlockReceipts(self.chainDb, h, self.hc.GetBlockNumber(h))
|
|
for _, receipt := range receipts {
|
|
deletedLogs = append(deletedLogs, receipt.Logs...)
|
|
|
|
deletedLogsByHash[h] = receipt.Logs
|
|
}
|
|
}
|
|
)
|
|
|
|
// first reduce whoever is higher bound
|
|
if oldBlock.NumberU64() > newBlock.NumberU64() {
|
|
// reduce old chain
|
|
for ; oldBlock != nil && oldBlock.NumberU64() != newBlock.NumberU64(); oldBlock = self.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 = self.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")
|
|
}
|
|
|
|
numSplit := newBlock.Number()
|
|
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 = self.GetBlock(oldBlock.ParentHash(), oldBlock.NumberU64()-1), self.GetBlock(newBlock.ParentHash(), newBlock.NumberU64()-1)
|
|
if oldBlock == nil {
|
|
return fmt.Errorf("Invalid old chain")
|
|
}
|
|
if newBlock == nil {
|
|
return fmt.Errorf("Invalid new chain")
|
|
}
|
|
}
|
|
|
|
if glog.V(logger.Debug) {
|
|
commonHash := commonBlock.Hash()
|
|
glog.Infof("Chain split detected @ %x. Reorganising chain from #%v %x to %x", commonHash[:4], numSplit, oldStart.Hash().Bytes()[:4], newStart.Hash().Bytes()[:4])
|
|
}
|
|
|
|
var addedTxs types.Transactions
|
|
// insert blocks. Order does not matter. Last block will be written in ImportChain itself which creates the new head properly
|
|
for _, block := range newChain {
|
|
// insert the block in the canonical way, re-writing history
|
|
self.insert(block)
|
|
// write canonical receipts and transactions
|
|
if err := WriteTransactions(self.chainDb, block); err != nil {
|
|
return err
|
|
}
|
|
receipts := GetBlockReceipts(self.chainDb, block.Hash(), block.NumberU64())
|
|
// write receipts
|
|
if err := WriteReceipts(self.chainDb, receipts); err != nil {
|
|
return err
|
|
}
|
|
// Write map map bloom filters
|
|
if err := WriteMipmapBloom(self.chainDb, block.NumberU64(), receipts); err != nil {
|
|
return err
|
|
}
|
|
addedTxs = append(addedTxs, block.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
|
|
for _, tx := range diff {
|
|
DeleteReceipt(self.chainDb, tx.Hash())
|
|
DeleteTransaction(self.chainDb, tx.Hash())
|
|
}
|
|
// Must be posted in a goroutine because of the transaction pool trying
|
|
// to acquire the chain manager lock
|
|
if len(diff) > 0 {
|
|
go self.eventMux.Post(RemovedTransactionEvent{diff})
|
|
}
|
|
if len(deletedLogs) > 0 {
|
|
go self.eventMux.Post(RemovedLogsEvent{deletedLogs})
|
|
}
|
|
|
|
if len(oldChain) > 0 {
|
|
go func() {
|
|
for _, block := range oldChain {
|
|
self.eventMux.Post(ChainSideEvent{Block: block, Logs: deletedLogsByHash[block.Hash()]})
|
|
}
|
|
}()
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// postChainEvents iterates over the events generated by a chain insertion and
|
|
// posts them into the event mux.
|
|
func (self *BlockChain) postChainEvents(events []interface{}, logs vm.Logs) {
|
|
// post event logs for further processing
|
|
self.eventMux.Post(logs)
|
|
for _, event := range events {
|
|
if event, ok := event.(ChainEvent); ok {
|
|
// We need some control over the mining operation. Acquiring locks and waiting for the miner to create new block takes too long
|
|
// and in most cases isn't even necessary.
|
|
if self.LastBlockHash() == event.Hash {
|
|
self.eventMux.Post(ChainHeadEvent{event.Block})
|
|
}
|
|
}
|
|
// Fire the insertion events individually too
|
|
self.eventMux.Post(event)
|
|
}
|
|
}
|
|
|
|
func (self *BlockChain) update() {
|
|
futureTimer := time.Tick(5 * time.Second)
|
|
for {
|
|
select {
|
|
case <-futureTimer:
|
|
self.procFutureBlocks()
|
|
case <-self.quit:
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// reportBlock logs a bad block error.
|
|
func reportBlock(block *types.Block, err error) {
|
|
if glog.V(logger.Error) {
|
|
glog.Errorf("Bad block #%v (%s)\n", block.Number(), block.Hash().Hex())
|
|
glog.Errorf(" %v", 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 (self *BlockChain) InsertHeaderChain(chain []*types.Header, checkFreq int) (int, error) {
|
|
// Make sure only one thread manipulates the chain at once
|
|
self.chainmu.Lock()
|
|
defer self.chainmu.Unlock()
|
|
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
whFunc := func(header *types.Header) error {
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
_, err := self.hc.WriteHeader(header)
|
|
return err
|
|
}
|
|
|
|
return self.hc.InsertHeaderChain(chain, checkFreq, whFunc)
|
|
}
|
|
|
|
// writeHeader writes a header into the local chain, given that its parent is
|
|
// already known. If the total difficulty of the newly inserted header becomes
|
|
// greater than the current known TD, the canonical chain is re-routed.
|
|
//
|
|
// Note: This method is not concurrent-safe with inserting blocks simultaneously
|
|
// into the chain, as side effects caused by reorganisations cannot be emulated
|
|
// without the real blocks. Hence, writing headers directly should only be done
|
|
// in two scenarios: pure-header mode of operation (light clients), or properly
|
|
// separated header/block phases (non-archive clients).
|
|
func (self *BlockChain) writeHeader(header *types.Header) error {
|
|
self.wg.Add(1)
|
|
defer self.wg.Done()
|
|
|
|
self.mu.Lock()
|
|
defer self.mu.Unlock()
|
|
|
|
_, err := self.hc.WriteHeader(header)
|
|
return err
|
|
}
|
|
|
|
// CurrentHeader retrieves the current head header of the canonical chain. The
|
|
// header is retrieved from the HeaderChain's internal cache.
|
|
func (self *BlockChain) CurrentHeader() *types.Header {
|
|
self.mu.RLock()
|
|
defer self.mu.RUnlock()
|
|
|
|
return self.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 (self *BlockChain) GetTd(hash common.Hash, number uint64) *big.Int {
|
|
return self.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 (self *BlockChain) GetTdByHash(hash common.Hash) *big.Int {
|
|
return self.hc.GetTdByHash(hash)
|
|
}
|
|
|
|
// GetHeader retrieves a block header from the database by hash and number,
|
|
// caching it if found.
|
|
func (self *BlockChain) GetHeader(hash common.Hash, number uint64) *types.Header {
|
|
return self.hc.GetHeader(hash, number)
|
|
}
|
|
|
|
// GetHeaderByHash retrieves a block header from the database by hash, caching it if
|
|
// found.
|
|
func (self *BlockChain) GetHeaderByHash(hash common.Hash) *types.Header {
|
|
return self.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) bool {
|
|
return bc.hc.HasHeader(hash)
|
|
}
|
|
|
|
// GetBlockHashesFromHash retrieves a number of block hashes starting at a given
|
|
// hash, fetching towards the genesis block.
|
|
func (self *BlockChain) GetBlockHashesFromHash(hash common.Hash, max uint64) []common.Hash {
|
|
return self.hc.GetBlockHashesFromHash(hash, max)
|
|
}
|
|
|
|
// GetHeaderByNumber retrieves a block header from the database by number,
|
|
// caching it (associated with its hash) if found.
|
|
func (self *BlockChain) GetHeaderByNumber(number uint64) *types.Header {
|
|
return self.hc.GetHeaderByNumber(number)
|
|
}
|
|
|
|
// Config retrieves the blockchain's chain configuration.
|
|
func (self *BlockChain) Config() *ChainConfig { return self.config }
|