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blockchain_impl.go
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blockchain_impl.go
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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
// Package core implements the Ethereum consensus protocol.
package core
import (
"bytes"
"encoding/json"
"fmt"
"io"
"math/big"
"os"
"strings"
"sync"
"sync/atomic"
"time"
"github.com/PositionExchange/posichain/block"
consensus_engine "github.com/PositionExchange/posichain/consensus/engine"
"github.com/PositionExchange/posichain/consensus/reward"
"github.com/PositionExchange/posichain/consensus/votepower"
"github.com/PositionExchange/posichain/core/rawdb"
"github.com/PositionExchange/posichain/core/state"
"github.com/PositionExchange/posichain/core/types"
"github.com/PositionExchange/posichain/core/vm"
"github.com/PositionExchange/posichain/internal/params"
"github.com/PositionExchange/posichain/internal/utils"
"github.com/PositionExchange/posichain/numeric"
"github.com/PositionExchange/posichain/shard"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/common/prque"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/metrics"
"github.com/ethereum/go-ethereum/rlp"
"github.com/PositionExchange/posichain/hmy/tracers"
"github.com/PositionExchange/posichain/shard/committee"
"github.com/PositionExchange/posichain/staking/apr"
"github.com/PositionExchange/posichain/staking/effective"
"github.com/PositionExchange/posichain/staking/slash"
staking "github.com/PositionExchange/posichain/staking/types"
lru "github.com/hashicorp/golang-lru"
"github.com/pkg/errors"
)
var (
headBlockGauge = metrics.NewRegisteredGauge("chain/head/block", nil)
headHeaderGauge = metrics.NewRegisteredGauge("chain/head/header", nil)
headFastBlockGauge = metrics.NewRegisteredGauge("chain/head/receipt", nil)
accountReadTimer = metrics.NewRegisteredTimer("chain/account/reads", nil)
accountHashTimer = metrics.NewRegisteredTimer("chain/account/hashes", nil)
accountUpdateTimer = metrics.NewRegisteredTimer("chain/account/updates", nil)
accountCommitTimer = metrics.NewRegisteredTimer("chain/account/commits", nil)
storageReadTimer = metrics.NewRegisteredTimer("chain/storage/reads", nil)
storageHashTimer = metrics.NewRegisteredTimer("chain/storage/hashes", nil)
storageUpdateTimer = metrics.NewRegisteredTimer("chain/storage/updates", nil)
storageCommitTimer = metrics.NewRegisteredTimer("chain/storage/commits", nil)
blockInsertTimer = metrics.NewRegisteredTimer("chain/inserts", nil)
blockValidationTimer = metrics.NewRegisteredTimer("chain/validation", nil)
blockExecutionTimer = metrics.NewRegisteredTimer("chain/execution", nil)
blockWriteTimer = metrics.NewRegisteredTimer("chain/write", nil)
// ErrNoGenesis is the error when there is no genesis.
ErrNoGenesis = errors.New("Genesis not found in chain")
// errExceedMaxPendingSlashes ..
errExceedMaxPendingSlashes = errors.New("exceeed max pending slashes")
errNilEpoch = errors.New("nil epoch for voting power computation")
)
const (
bodyCacheLimit = 2048
blockCacheLimit = 2048
receiptsCacheLimit = 32
maxFutureBlocks = 256
maxTimeFutureBlocks = 30
badBlockLimit = 10
triesInMemory = 128
shardCacheLimit = 10
commitsCacheLimit = 10
epochCacheLimit = 10
randomnessCacheLimit = 10
validatorCacheLimit = 1024
validatorStatsCacheLimit = 1024
validatorListCacheLimit = 10
validatorListByDelegatorCacheLimit = 1024
pendingCrossLinksCacheLimit = 2
blockAccumulatorCacheLimit = 256
maxPendingSlashes = 512
// BlockChainVersion ensures that an incompatible database forces a resync from scratch.
BlockChainVersion = 3
pendingCLCacheKey = "pendingCLs"
)
// CacheConfig contains the configuration values for the trie caching/pruning
// that's resident in a blockchain.
type CacheConfig struct {
Disabled bool // Whether to disable trie write caching (archive node)
TrieNodeLimit int // Memory limit (MB) at which to flush the current in-memory trie to disk
TrieTimeLimit time.Duration // Time limit after which to flush the current in-memory trie to disk
}
type BlockChainImpl struct {
chainConfig *params.ChainConfig // Chain & network configuration
cacheConfig *CacheConfig // Cache configuration for pruning
pruneBeaconChainEnable bool // pruneBeaconChainEnable is enable prune BeaconChain feature
db ethdb.Database // Low level persistent database to store final content in
triegc *prque.Prque // Priority queue mapping block numbers to tries to gc
gcproc time.Duration // Accumulates canonical block processing for trie dumping
hc *HeaderChain
trace bool // atomic?
traceFeed event.Feed // send trace_block result to explorer
rmLogsFeed event.Feed
chainFeed event.Feed
chainSideFeed event.Feed
chainHeadFeed event.Feed
logsFeed event.Feed
scope event.SubscriptionScope
genesisBlock *types.Block
mu sync.RWMutex // global mutex for locking chain operations
chainmu sync.RWMutex // blockchain insertion lock
procmu sync.RWMutex // block processor lock
pendingCrossLinksMutex sync.RWMutex // pending crosslinks lock
pendingSlashingCandidatesMU sync.RWMutex // pending slashing candidates
currentBlock atomic.Value // Current head of the block chain
currentFastBlock atomic.Value // Current head of the fast-sync chain (may be above the block chain!)
stateCache state.Database // State database to reuse between imports (contains state cache)
bodyCache *lru.Cache // Cache for the most recent block bodies
bodyRLPCache *lru.Cache // Cache for the most recent block bodies in RLP encoded format
receiptsCache *lru.Cache // Cache for the most recent receipts per block
blockCache *lru.Cache // Cache for the most recent entire blocks
futureBlocks *lru.Cache // future blocks are blocks added for later processing
shardStateCache *lru.Cache
lastCommitsCache *lru.Cache
epochCache *lru.Cache // Cache epoch number → first block number
randomnessCache *lru.Cache // Cache for vrf/vdf
validatorSnapshotCache *lru.Cache // Cache for validator snapshot
validatorStatsCache *lru.Cache // Cache for validator stats
validatorListCache *lru.Cache // Cache of validator list
validatorListByDelegatorCache *lru.Cache // Cache of validator list by delegator
pendingCrossLinksCache *lru.Cache // Cache of last pending crosslinks
blockAccumulatorCache *lru.Cache // Cache of block accumulators
quit chan struct{} // blockchain quit channel
running int32 // running must be called atomically
blockchainPruner *blockchainPruner // use to prune beacon chain
// procInterrupt must be atomically called
procInterrupt int32 // interrupt signaler for block processing
engine consensus_engine.Engine
processor Processor // block processor interface
validator Validator // block and state validator interface
vmConfig vm.Config
badBlocks *lru.Cache // Bad block cache
shouldPreserve func(*types.Block) bool // Function used to determine whether should preserve the given block.
pendingSlashes slash.Records
maxGarbCollectedBlkNum int64
}
// NewBlockChain returns a fully initialised block chain using information
// available in the database. It initialises the default Ethereum validator and
// Processor.
func NewBlockChain(
db ethdb.Database, cacheConfig *CacheConfig, chainConfig *params.ChainConfig,
engine consensus_engine.Engine, vmConfig vm.Config,
shouldPreserve func(block *types.Block) bool,
) (*BlockChainImpl, error) {
if cacheConfig == nil {
cacheConfig = &CacheConfig{
TrieNodeLimit: 256 * 1024 * 1024,
TrieTimeLimit: 2 * time.Minute,
}
}
bodyCache, _ := lru.New(bodyCacheLimit)
bodyRLPCache, _ := lru.New(bodyCacheLimit)
receiptsCache, _ := lru.New(receiptsCacheLimit)
blockCache, _ := lru.New(blockCacheLimit)
futureBlocks, _ := lru.New(maxFutureBlocks)
badBlocks, _ := lru.New(badBlockLimit)
shardCache, _ := lru.New(shardCacheLimit)
commitsCache, _ := lru.New(commitsCacheLimit)
epochCache, _ := lru.New(epochCacheLimit)
randomnessCache, _ := lru.New(randomnessCacheLimit)
validatorCache, _ := lru.New(validatorCacheLimit)
validatorStatsCache, _ := lru.New(validatorStatsCacheLimit)
validatorListCache, _ := lru.New(validatorListCacheLimit)
validatorListByDelegatorCache, _ := lru.New(validatorListByDelegatorCacheLimit)
pendingCrossLinksCache, _ := lru.New(pendingCrossLinksCacheLimit)
blockAccumulatorCache, _ := lru.New(blockAccumulatorCacheLimit)
bc := &BlockChainImpl{
chainConfig: chainConfig,
cacheConfig: cacheConfig,
db: db,
triegc: prque.New(nil),
stateCache: state.NewDatabase(db),
quit: make(chan struct{}),
shouldPreserve: shouldPreserve,
bodyCache: bodyCache,
bodyRLPCache: bodyRLPCache,
receiptsCache: receiptsCache,
blockCache: blockCache,
futureBlocks: futureBlocks,
shardStateCache: shardCache,
lastCommitsCache: commitsCache,
epochCache: epochCache,
randomnessCache: randomnessCache,
validatorSnapshotCache: validatorCache,
validatorStatsCache: validatorStatsCache,
validatorListCache: validatorListCache,
validatorListByDelegatorCache: validatorListByDelegatorCache,
pendingCrossLinksCache: pendingCrossLinksCache,
blockAccumulatorCache: blockAccumulatorCache,
blockchainPruner: newBlockchainPruner(db),
engine: engine,
vmConfig: vmConfig,
badBlocks: badBlocks,
pendingSlashes: slash.Records{},
maxGarbCollectedBlkNum: -1,
}
bc.SetValidator(NewBlockValidator(chainConfig, bc, engine))
bc.SetProcessor(NewStateProcessor(chainConfig, bc, engine))
var err error
bc.hc, err = NewHeaderChain(db, chainConfig, engine, bc.getProcInterrupt)
if err != nil {
return nil, err
}
bc.genesisBlock = bc.GetBlockByNumber(0)
if bc.genesisBlock == nil {
return nil, ErrNoGenesis
}
var nilBlock *types.Block
bc.currentBlock.Store(nilBlock)
bc.currentFastBlock.Store(nilBlock)
if err := bc.loadLastState(); err != nil {
return nil, err
}
// Take ownership of this particular state
go bc.update()
return bc, nil
}
func (bc *BlockChainImpl) ValidateNewBlock(block *types.Block) error {
state, err := state.New(bc.CurrentBlock().Root(), bc.stateCache)
if err != nil {
return err
}
// NOTE Order of mutating state here matters.
// Process block using the parent state as reference point.
// Do not read cache from processor.
receipts, cxReceipts, _, _, usedGas, _, _, err := bc.processor.Process(
block, state, bc.vmConfig, false,
)
if err != nil {
bc.reportBlock(block, receipts, err)
return err
}
// Verify all the hash roots (state, txns, receipts, cross-shard)
if err := bc.Validator().ValidateState(
block, state, receipts, cxReceipts, usedGas,
); err != nil {
bc.reportBlock(block, receipts, err)
return err
}
return nil
}
// IsEpochBlock returns whether this block is the first block of an epoch.
// by checking if the previous block is the last block of the previous epoch
func IsEpochBlock(block *types.Block) bool {
if block.NumberU64() == 0 {
// genesis block is the first epoch block
return true
}
return shard.Schedule.IsLastBlock(block.NumberU64() - 1)
}
func (bc *BlockChainImpl) getProcInterrupt() bool {
return atomic.LoadInt32(&bc.procInterrupt) == 1
}
// loadLastState loads the last known chain state from the database. This method
// assumes that the chain manager mutex is held.
func (bc *BlockChainImpl) loadLastState() error {
// Restore the last known head block
head := rawdb.ReadHeadBlockHash(bc.db)
if head == (common.Hash{}) {
// Corrupt or empty database, init from scratch
utils.Logger().Warn().Msg("Empty database, resetting chain")
return bc.Reset()
}
// Make sure the entire head block is available
currentBlock := bc.GetBlockByHash(head)
if currentBlock == nil {
// Corrupt or empty database, init from scratch
utils.Logger().Warn().Str("hash", head.Hex()).Msg("Head block missing, resetting chain")
return bc.Reset()
}
// Make sure the state associated with the block is available
if _, err := state.New(currentBlock.Root(), bc.stateCache); err != nil {
// Dangling block without a state associated, init from scratch
utils.Logger().Warn().
Str("number", currentBlock.Number().String()).
Str("hash", currentBlock.Hash().Hex()).
Msg("Head state missing, repairing chain")
if err := bc.repair(¤tBlock); err != nil {
return err
}
}
// Everything seems to be fine, set as the head block
bc.currentBlock.Store(currentBlock)
headBlockGauge.Update(int64(currentBlock.NumberU64()))
// We don't need the following as we want the current header and block to be consistent
// Restore the last known head header
//currentHeader := currentBlock.Header()
//if head := rawdb.ReadHeadHeaderHash(bc.db); head != (common.Hash{}) {
// if header := bc.GetHeaderByHash(head); header != nil {
// currentHeader = header
// }
//}
currentHeader := currentBlock.Header()
if err := bc.hc.SetCurrentHeader(currentHeader); err != nil {
return errors.Wrap(err, "headerChain SetCurrentHeader")
}
// Restore the last known head fast block
bc.currentFastBlock.Store(currentBlock)
headFastBlockGauge.Update(int64(currentBlock.NumberU64()))
if head := rawdb.ReadHeadFastBlockHash(bc.db); head != (common.Hash{}) {
if block := bc.GetBlockByHash(head); block != nil {
bc.currentFastBlock.Store(block)
headFastBlockGauge.Update(int64(block.NumberU64()))
}
}
// Issue a status log for the user
currentFastBlock := bc.CurrentFastBlock()
headerTd := bc.GetTd(currentHeader.Hash(), currentHeader.Number().Uint64())
blockTd := bc.GetTd(currentBlock.Hash(), currentBlock.NumberU64())
fastTd := bc.GetTd(currentFastBlock.Hash(), currentFastBlock.NumberU64())
utils.Logger().Info().
Str("number", currentHeader.Number().String()).
Str("hash", currentHeader.Hash().Hex()).
Str("td", headerTd.String()).
Str("age", common.PrettyAge(time.Unix(currentHeader.Time().Int64(), 0)).String()).
Msg("Loaded most recent local header")
utils.Logger().Info().
Str("number", currentBlock.Number().String()).
Str("hash", currentBlock.Hash().Hex()).
Str("td", blockTd.String()).
Str("age", common.PrettyAge(time.Unix(currentBlock.Time().Int64(), 0)).String()).
Msg("Loaded most recent local full block")
utils.Logger().Info().
Str("number", currentFastBlock.Number().String()).
Str("hash", currentFastBlock.Hash().Hex()).
Str("td", fastTd.String()).
Str("age", common.PrettyAge(time.Unix(currentFastBlock.Time().Int64(), 0)).String()).
Msg("Loaded most recent local fast block")
return nil
}
func (bc *BlockChainImpl) SetHead(head uint64) error {
utils.Logger().Warn().Uint64("target", head).Msg("Rewinding blockchain")
bc.mu.Lock()
defer bc.mu.Unlock()
// Rewind the header chain, deleting all block bodies until then
delFn := func(db rawdb.DatabaseDeleter, hash common.Hash, num uint64) error {
return rawdb.DeleteBody(db, hash, num)
}
if err := bc.hc.SetHead(head, delFn); err != nil {
return errors.Wrap(err, "headerChain SetHeader")
}
currentHeader := bc.hc.CurrentHeader()
// Clear out any stale content from the caches
bc.bodyCache.Purge()
bc.bodyRLPCache.Purge()
bc.receiptsCache.Purge()
bc.blockCache.Purge()
bc.futureBlocks.Purge()
bc.shardStateCache.Purge()
// Rewind the block chain, ensuring we don't end up with a stateless head block
if currentBlock := bc.CurrentBlock(); currentBlock != nil && currentHeader.Number().Uint64() < currentBlock.NumberU64() {
newHeadBlock := bc.GetBlock(currentHeader.Hash(), currentHeader.Number().Uint64())
bc.currentBlock.Store(newHeadBlock)
headBlockGauge.Update(int64(newHeadBlock.NumberU64()))
}
if currentBlock := bc.CurrentBlock(); currentBlock != nil {
if _, err := state.New(currentBlock.Root(), bc.stateCache); err != nil {
// Rewound state missing, rolled back to before pivot, reset to genesis
bc.currentBlock.Store(bc.genesisBlock)
headBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
}
}
// Rewind the fast block in a simpleton way to the target head
if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock != nil && currentHeader.Number().Uint64() < currentFastBlock.NumberU64() {
newHeadFastBlock := bc.GetBlock(currentHeader.Hash(), currentHeader.Number().Uint64())
bc.currentFastBlock.Store(newHeadFastBlock)
headFastBlockGauge.Update(int64(newHeadFastBlock.NumberU64()))
}
// If either blocks reached nil, reset to the genesis state
if currentBlock := bc.CurrentBlock(); currentBlock == nil {
bc.currentBlock.Store(bc.genesisBlock)
headBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
}
if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock == nil {
bc.currentFastBlock.Store(bc.genesisBlock)
headFastBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
}
currentBlock := bc.CurrentBlock()
currentFastBlock := bc.CurrentFastBlock()
if err := rawdb.WriteHeadBlockHash(bc.db, currentBlock.Hash()); err != nil {
return err
}
if err := rawdb.WriteHeadFastBlockHash(bc.db, currentFastBlock.Hash()); err != nil {
return err
}
return bc.loadLastState()
}
// TODO: use a better solution before resharding shuffle nodes to different shards.
func (bc *BlockChainImpl) ShardID() uint32 {
return bc.CurrentBlock().ShardID()
}
func (bc *BlockChainImpl) CurrentBlock() *types.Block {
return bc.currentBlock.Load().(*types.Block)
}
// CurrentFastBlock retrieves the current fast-sync head block of the canonical
// chain. The block is retrieved from the blockchain's internal cache.
func (bc *BlockChainImpl) CurrentFastBlock() *types.Block {
return bc.currentFastBlock.Load().(*types.Block)
}
func (bc *BlockChainImpl) SetProcessor(processor Processor) {
bc.procmu.Lock()
defer bc.procmu.Unlock()
bc.processor = processor
}
func (bc *BlockChainImpl) SetValidator(validator Validator) {
bc.procmu.Lock()
defer bc.procmu.Unlock()
bc.validator = validator
}
func (bc *BlockChainImpl) Validator() Validator {
bc.procmu.RLock()
defer bc.procmu.RUnlock()
return bc.validator
}
func (bc *BlockChainImpl) Processor() Processor {
bc.procmu.RLock()
defer bc.procmu.RUnlock()
return bc.processor
}
func (bc *BlockChainImpl) State() (*state.DB, error) {
return bc.StateAt(bc.CurrentBlock().Root())
}
func (bc *BlockChainImpl) StateAt(root common.Hash) (*state.DB, error) {
return state.New(root, bc.stateCache)
}
func (bc *BlockChainImpl) Reset() error {
return bc.ResetWithGenesisBlock(bc.genesisBlock)
}
func (bc *BlockChainImpl) ResetWithGenesisBlock(genesis *types.Block) error {
// Dump the entire block chain and purge the caches
if err := bc.SetHead(0); err != nil {
return err
}
bc.mu.Lock()
defer bc.mu.Unlock()
// Prepare the genesis block and reinitialise the chain
if err := rawdb.WriteBlock(bc.db, genesis); err != nil {
return err
}
bc.genesisBlock = genesis
if err := bc.insert(bc.genesisBlock); err != nil {
return err
}
bc.hc.SetGenesis(bc.genesisBlock.Header())
if err := bc.hc.SetCurrentHeader(bc.genesisBlock.Header()); err != nil {
return err
}
bc.currentBlock.Store(bc.genesisBlock)
headBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
bc.currentFastBlock.Store(bc.genesisBlock)
headFastBlockGauge.Update(int64(bc.genesisBlock.NumberU64()))
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 *BlockChainImpl) repair(head **types.Block) error {
valsToRemove := map[common.Address]struct{}{}
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 {
utils.Logger().Info().
Str("number", (*head).Number().String()).
Str("hash", (*head).Hash().Hex()).
Msg("Rewound blockchain to past state")
return bc.removeInValidatorList(valsToRemove)
}
// Repair last commit sigs
lastSig := (*head).Header().LastCommitSignature()
sigAndBitMap := append(lastSig[:], (*head).Header().LastCommitBitmap()...)
bc.WriteCommitSig((*head).NumberU64()-1, sigAndBitMap)
// Otherwise rewind one block and recheck state availability there
for _, stkTxn := range (*head).StakingTransactions() {
if stkTxn.StakingType() == staking.DirectiveCreateValidator {
if addr, err := stkTxn.SenderAddress(); err == nil {
valsToRemove[addr] = struct{}{}
} else {
return err
}
}
}
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
}
}
// This func is used to remove the validator addresses from the validator list.
func (bc *BlockChainImpl) removeInValidatorList(toRemove map[common.Address]struct{}) error {
if len(toRemove) == 0 {
return nil
}
utils.Logger().Info().
Interface("validators", toRemove).
Msg("Removing validators from validator list")
existingVals, err := bc.ReadValidatorList()
if err != nil {
return err
}
newVals := []common.Address{}
for _, addr := range existingVals {
if _, ok := toRemove[addr]; !ok {
newVals = append(newVals, addr)
}
}
return bc.WriteValidatorList(bc.db, newVals)
}
// Export writes the active chain to the given writer.
func (bc *BlockChainImpl) 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 *BlockChainImpl) ExportN(w io.Writer, first uint64, last uint64) error {
bc.mu.RLock()
defer bc.mu.RUnlock()
if first > last {
return fmt.Errorf("export failed: first (%d) is greater than last (%d)", first, last)
}
utils.Logger().Info().Uint64("count", last-first+1).Msg("Exporting batch of blocks")
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 {
utils.Logger().Info().
Uint64("exported", block.NumberU64()-first).
Str("elapsed", common.PrettyDuration(time.Since(start)).String()).
Msg("Exporting blocks")
reported = time.Now()
}
}
return nil
}
// writeHeadBlock writes a new head block
func (bc *BlockChainImpl) writeHeadBlock(block *types.Block) error {
// 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
batch := bc.ChainDb().NewBatch()
if err := rawdb.WriteCanonicalHash(batch, block.Hash(), block.NumberU64()); err != nil {
return err
}
if err := rawdb.WriteHeadBlockHash(batch, block.Hash()); err != nil {
return err
}
if err := batch.Write(); err != nil {
return err
}
bc.currentBlock.Store(block)
headBlockGauge.Update(int64(block.NumberU64()))
// If the block is better than our head or is on a different chain, force update heads
if updateHeads {
if err := bc.hc.SetCurrentHeader(block.Header()); err != nil {
return errors.Wrap(err, "HeaderChain SetCurrentHeader")
}
if err := rawdb.WriteHeadFastBlockHash(bc.db, block.Hash()); err != nil {
return err
}
bc.currentFastBlock.Store(block)
headFastBlockGauge.Update(int64(block.NumberU64()))
}
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 *BlockChainImpl) insert(block *types.Block) error {
return bc.writeHeadBlock(block)
}
// Genesis retrieves the chain's genesis block.
func (bc *BlockChainImpl) 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 *BlockChainImpl) 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 *BlockChainImpl) 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
}
func (bc *BlockChainImpl) HasBlock(hash common.Hash, number uint64) bool {
if bc.blockCache.Contains(hash) {
return true
}
return rawdb.HasBody(bc.db, hash, number)
}
func (bc *BlockChainImpl) HasState(hash common.Hash) bool {
_, err := bc.stateCache.OpenTrie(hash)
return err == nil
}
func (bc *BlockChainImpl) 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())
}
func (bc *BlockChainImpl) 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
}
func (bc *BlockChainImpl) GetBlockByHash(hash common.Hash) *types.Block {
number := bc.hc.GetBlockNumber(hash)
if number == nil {
return nil
}
return bc.GetBlock(hash, *number)
}
func (bc *BlockChainImpl) GetBlockByNumber(number uint64) *types.Block {
hash := rawdb.ReadCanonicalHash(bc.db, number)
if hash == (common.Hash{}) {
return nil
}
return bc.GetBlock(hash, number)
}
func (bc *BlockChainImpl) 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)
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 *BlockChainImpl) 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
}
func (bc *BlockChainImpl) GetUnclesInChain(b *types.Block, length int) []*block.Header {
uncles := []*block.Header{}
for i := 0; b != nil && i < length; i++ {
uncles = append(uncles, b.Uncles()...)
b = bc.GetBlock(b.ParentHash(), b.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 *BlockChainImpl) TrieNode(hash common.Hash) ([]byte, error) {
return bc.stateCache.TrieDB().Node(hash)
}
func (bc *BlockChainImpl) Stop() {
if !atomic.CompareAndSwapInt32(&bc.running, 0, 1) {
return
}
bc.chainmu.Lock()
defer bc.chainmu.Unlock()
if err := bc.SavePendingCrossLinks(); err != nil {
utils.Logger().Error().Err(err).Msg("Failed to save pending cross links")
}
// Unsubscribe all subscriptions registered from blockchain
bc.scope.Close()
close(bc.quit)
atomic.StoreInt32(&bc.procInterrupt, 1)
// 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.GetHeaderByNumber(number - offset)
if recent != nil {
utils.Logger().Info().
Str("block", recent.Number().String()).
Str("hash", recent.Hash().Hex()).
Str("root", recent.Root().Hex()).
Msg("Writing cached state to disk")
if err := triedb.Commit(recent.Root(), true); err != nil {
utils.Logger().Error().Err(err).Msg("Failed to commit recent state trie")
}
}
}
}
for !bc.triegc.Empty() {
triedb.Dereference(bc.triegc.PopItem().(common.Hash))
}
if size, _ := triedb.Size(); size != 0 {
utils.Logger().Error().Msg("Dangling trie nodes after full cleanup")
}
}
utils.Logger().Info().Msg("Blockchain manager stopped")
}
func (bc *BlockChainImpl) 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], true /* verifyHeaders */)
}
}
}
// WriteStatus status of write
type WriteStatus byte
// Constants for WriteStatus
const (
NonStatTy WriteStatus = iota
CanonStatTy
SideStatTy
)
func (bc *BlockChainImpl) Rollback(chain []common.Hash) error {
bc.mu.Lock()
defer bc.mu.Unlock()
valsToRemove := map[common.Address]struct{}{}
for i := len(chain) - 1; i >= 0; i-- {
hash := chain[i]
currentHeader := bc.hc.CurrentHeader()
if currentHeader != nil && currentHeader.Hash() == hash {
parentHeader := bc.GetHeader(currentHeader.ParentHash(), currentHeader.Number().Uint64()-1)
if parentHeader != nil {
if err := bc.hc.SetCurrentHeader(parentHeader); err != nil {
return errors.Wrap(err, "HeaderChain SetCurrentHeader")
}
}
}
if currentFastBlock := bc.CurrentFastBlock(); currentFastBlock != nil && currentFastBlock.Hash() == hash {
newFastBlock := bc.GetBlock(currentFastBlock.ParentHash(), currentFastBlock.NumberU64()-1)
if newFastBlock != nil {
bc.currentFastBlock.Store(newFastBlock)
headFastBlockGauge.Update(int64(newFastBlock.NumberU64()))
rawdb.WriteHeadFastBlockHash(bc.db, newFastBlock.Hash())
}
}
if currentBlock := bc.CurrentBlock(); currentBlock != nil && currentBlock.Hash() == hash {
newBlock := bc.GetBlock(currentBlock.ParentHash(), currentBlock.NumberU64()-1)
if newBlock != nil {
bc.currentBlock.Store(newBlock)
headBlockGauge.Update(int64(newBlock.NumberU64()))
if err := rawdb.WriteHeadBlockHash(bc.db, newBlock.Hash()); err != nil {
return err
}
for _, stkTxn := range currentBlock.StakingTransactions() {
if stkTxn.StakingType() == staking.DirectiveCreateValidator {
if addr, err := stkTxn.SenderAddress(); err == nil {
valsToRemove[addr] = struct{}{}
}
}
}
}
}
}
return bc.removeInValidatorList(valsToRemove)
}
// 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.Epoch())
ethSigner := types.NewEIP155Signer(config.EthCompatibleChainID)
transactions, stakingTransactions, logIndex := block.Transactions(), block.StakingTransactions(), uint(0)
if len(transactions)+len(stakingTransactions) != len(receipts) {
return errors.New("transaction+stakingTransactions and receipt count mismatch")
}
// The used gas can be calculated based on previous receipts
if len(receipts) > 0 && len(transactions) > 0 {
receipts[0].GasUsed = receipts[0].CumulativeGasUsed
}
for j := 1; j < len(transactions); j++ {
// The transaction hash can be retrieved from the transaction itself
receipts[j].TxHash = transactions[j].Hash()
receipts[j].GasUsed = receipts[j].CumulativeGasUsed - receipts[j-1].CumulativeGasUsed
// 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
var from common.Address
if transactions[j].IsEthCompatible() {
from, _ = types.Sender(ethSigner, transactions[j])
} else {
from, _ = types.Sender(signer, transactions[j])
}
receipts[j].ContractAddress = crypto.CreateAddress(from, transactions[j].Nonce())
}
// 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++
}
}
// The used gas can be calculated based on previous receipts
if len(receipts) > len(transactions) && len(stakingTransactions) > 0 {
receipts[len(transactions)].GasUsed = receipts[len(transactions)].CumulativeGasUsed
}
// in a block, txns are processed before staking txns
for j := len(transactions) + 1; j < len(transactions)+len(stakingTransactions); j++ {
// The transaction hash can be retrieved from the staking transaction itself
receipts[j].TxHash = stakingTransactions[j].Hash()
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()