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process.go
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process.go
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package coordinator
import (
"bytes"
"sort"
"sync"
"time"
"github.com/ElrondNetwork/elrond-go/core"
"github.com/ElrondNetwork/elrond-go/core/check"
"github.com/ElrondNetwork/elrond-go/data"
"github.com/ElrondNetwork/elrond-go/data/block"
"github.com/ElrondNetwork/elrond-go/data/state"
"github.com/ElrondNetwork/elrond-go/hashing"
"github.com/ElrondNetwork/elrond-go/logger"
"github.com/ElrondNetwork/elrond-go/marshal"
"github.com/ElrondNetwork/elrond-go/process"
"github.com/ElrondNetwork/elrond-go/process/factory"
"github.com/ElrondNetwork/elrond-go/sharding"
"github.com/ElrondNetwork/elrond-go/storage"
)
var log = logger.GetOrCreate("process/coordinator")
type transactionCoordinator struct {
shardCoordinator sharding.Coordinator
accounts state.AccountsAdapter
miniBlockPool storage.Cacher
hasher hashing.Hasher
marshalizer marshal.Marshalizer
mutPreProcessor sync.RWMutex
txPreProcessors map[block.Type]process.PreProcessor
keysTxPreProcs []block.Type
mutInterimProcessors sync.RWMutex
interimProcessors map[block.Type]process.IntermediateTransactionHandler
keysInterimProcs []block.Type
mutRequestedTxs sync.RWMutex
requestedTxs map[block.Type]int
onRequestMiniBlock func(shardId uint32, mbHash []byte)
gasHandler process.GasHandler
}
// NewTransactionCoordinator creates a transaction coordinator to run and coordinate preprocessors and processors
func NewTransactionCoordinator(
hasher hashing.Hasher,
marshalizer marshal.Marshalizer,
shardCoordinator sharding.Coordinator,
accounts state.AccountsAdapter,
miniBlockPool storage.Cacher,
requestHandler process.RequestHandler,
preProcessors process.PreProcessorsContainer,
interProcessors process.IntermediateProcessorContainer,
gasHandler process.GasHandler,
) (*transactionCoordinator, error) {
if check.IfNil(shardCoordinator) {
return nil, process.ErrNilShardCoordinator
}
if check.IfNil(accounts) {
return nil, process.ErrNilAccountsAdapter
}
if check.IfNil(miniBlockPool) {
return nil, process.ErrNilMiniBlockPool
}
if check.IfNil(requestHandler) {
return nil, process.ErrNilRequestHandler
}
if check.IfNil(interProcessors) {
return nil, process.ErrNilIntermediateProcessorContainer
}
if check.IfNil(preProcessors) {
return nil, process.ErrNilPreProcessorsContainer
}
if check.IfNil(gasHandler) {
return nil, process.ErrNilGasHandler
}
if check.IfNil(hasher) {
return nil, process.ErrNilHasher
}
if check.IfNil(marshalizer) {
return nil, process.ErrNilMarshalizer
}
tc := &transactionCoordinator{
shardCoordinator: shardCoordinator,
accounts: accounts,
gasHandler: gasHandler,
hasher: hasher,
marshalizer: marshalizer,
}
tc.miniBlockPool = miniBlockPool
tc.miniBlockPool.RegisterHandler(tc.receivedMiniBlock)
tc.onRequestMiniBlock = requestHandler.RequestMiniBlock
tc.requestedTxs = make(map[block.Type]int)
tc.txPreProcessors = make(map[block.Type]process.PreProcessor)
tc.interimProcessors = make(map[block.Type]process.IntermediateTransactionHandler)
tc.keysTxPreProcs = preProcessors.Keys()
sort.Slice(tc.keysTxPreProcs, func(i, j int) bool {
return tc.keysTxPreProcs[i] < tc.keysTxPreProcs[j]
})
for _, value := range tc.keysTxPreProcs {
preProc, err := preProcessors.Get(value)
if err != nil {
return nil, err
}
tc.txPreProcessors[value] = preProc
}
tc.keysInterimProcs = interProcessors.Keys()
sort.Slice(tc.keysInterimProcs, func(i, j int) bool {
return tc.keysInterimProcs[i] < tc.keysInterimProcs[j]
})
for _, value := range tc.keysInterimProcs {
interProc, err := interProcessors.Get(value)
if err != nil {
return nil, err
}
tc.interimProcessors[value] = interProc
}
return tc, nil
}
// separateBodyByType creates a map of bodies according to type
func (tc *transactionCoordinator) separateBodyByType(body block.Body) map[block.Type]block.Body {
separatedBodies := make(map[block.Type]block.Body)
for i := 0; i < len(body); i++ {
mb := body[i]
if separatedBodies[mb.Type] == nil {
separatedBodies[mb.Type] = block.Body{}
}
separatedBodies[mb.Type] = append(separatedBodies[mb.Type], mb)
}
return separatedBodies
}
// initRequestedTxs init the requested txs number
func (tc *transactionCoordinator) initRequestedTxs() {
tc.mutRequestedTxs.Lock()
tc.requestedTxs = make(map[block.Type]int)
tc.mutRequestedTxs.Unlock()
}
// RequestBlockTransactions verifies missing transaction and requests them
func (tc *transactionCoordinator) RequestBlockTransactions(body block.Body) {
separatedBodies := tc.separateBodyByType(body)
tc.initRequestedTxs()
wg := sync.WaitGroup{}
wg.Add(len(separatedBodies))
for key, value := range separatedBodies {
go func(blockType block.Type, blockBody block.Body) {
preproc := tc.getPreProcessor(blockType)
if preproc == nil {
wg.Done()
return
}
requestedTxs := preproc.RequestBlockTransactions(blockBody)
tc.mutRequestedTxs.Lock()
tc.requestedTxs[blockType] = requestedTxs
tc.mutRequestedTxs.Unlock()
wg.Done()
}(key, value)
}
wg.Wait()
}
// IsDataPreparedForProcessing verifies if all the needed data is prepared
func (tc *transactionCoordinator) IsDataPreparedForProcessing(haveTime func() time.Duration) error {
var errFound error
errMutex := sync.Mutex{}
wg := sync.WaitGroup{}
tc.mutRequestedTxs.RLock()
wg.Add(len(tc.requestedTxs))
for key, value := range tc.requestedTxs {
go func(blockType block.Type, requestedTxs int) {
preproc := tc.getPreProcessor(blockType)
if preproc == nil {
wg.Done()
return
}
err := preproc.IsDataPrepared(requestedTxs, haveTime)
if err != nil {
log.Trace("IsDataPrepared", "error", err.Error())
errMutex.Lock()
errFound = err
errMutex.Unlock()
}
wg.Done()
}(key, value)
}
tc.mutRequestedTxs.RUnlock()
wg.Wait()
return errFound
}
// SaveBlockDataToStorage saves the data from block body into storage units
func (tc *transactionCoordinator) SaveBlockDataToStorage(body block.Body) error {
separatedBodies := tc.separateBodyByType(body)
var errFound error
errMutex := sync.Mutex{}
wg := sync.WaitGroup{}
wg.Add(len(separatedBodies) + len(tc.keysInterimProcs))
for key, value := range separatedBodies {
go func(blockType block.Type, blockBody block.Body) {
preproc := tc.getPreProcessor(blockType)
if preproc == nil {
wg.Done()
return
}
err := preproc.SaveTxBlockToStorage(blockBody)
if err != nil {
log.Trace("SaveTxBlockToStorage", "error", err.Error())
errMutex.Lock()
errFound = err
errMutex.Unlock()
}
wg.Done()
}(key, value)
}
for _, blockType := range tc.keysInterimProcs {
go func(blockType block.Type) {
intermediateProc := tc.getInterimProcessor(blockType)
if intermediateProc == nil {
wg.Done()
return
}
err := intermediateProc.SaveCurrentIntermediateTxToStorage()
if err != nil {
log.Trace("SaveCurrentIntermediateTxToStorage", "error", err.Error())
errMutex.Lock()
errFound = err
errMutex.Unlock()
}
wg.Done()
}(blockType)
}
wg.Wait()
return errFound
}
// RestoreBlockDataFromStorage restores block data from storage to pool
func (tc *transactionCoordinator) RestoreBlockDataFromStorage(body block.Body) (int, error) {
separatedBodies := tc.separateBodyByType(body)
var errFound error
localMutex := sync.Mutex{}
totalRestoredTx := 0
wg := sync.WaitGroup{}
wg.Add(len(separatedBodies))
for key, value := range separatedBodies {
go func(blockType block.Type, blockBody block.Body) {
preproc := tc.getPreProcessor(blockType)
if preproc == nil {
wg.Done()
return
}
restoredTxs, err := preproc.RestoreTxBlockIntoPools(blockBody, tc.miniBlockPool)
if err != nil {
log.Trace("RestoreTxBlockIntoPools", "error", err.Error())
localMutex.Lock()
errFound = err
localMutex.Unlock()
}
localMutex.Lock()
totalRestoredTx += restoredTxs
localMutex.Unlock()
wg.Done()
}(key, value)
}
wg.Wait()
return totalRestoredTx, errFound
}
// RemoveBlockDataFromPool deletes block data from pools
func (tc *transactionCoordinator) RemoveBlockDataFromPool(body block.Body) error {
separatedBodies := tc.separateBodyByType(body)
var errFound error
errMutex := sync.Mutex{}
wg := sync.WaitGroup{}
wg.Add(len(separatedBodies))
for key, value := range separatedBodies {
go func(blockType block.Type, blockBody block.Body) {
preproc := tc.getPreProcessor(blockType)
if preproc == nil || preproc.IsInterfaceNil() {
wg.Done()
return
}
err := preproc.RemoveTxBlockFromPools(blockBody, tc.miniBlockPool)
if err != nil {
log.Trace("RemoveTxBlockFromPools", "error", err.Error())
errMutex.Lock()
errFound = err
errMutex.Unlock()
}
wg.Done()
}(key, value)
}
wg.Wait()
return errFound
}
// ProcessBlockTransaction processes transactions and updates state tries
func (tc *transactionCoordinator) ProcessBlockTransaction(
body block.Body,
timeRemaining func() time.Duration,
) error {
haveTime := func() bool {
return timeRemaining() >= 0
}
separatedBodies := tc.separateBodyByType(body)
// processing has to be done in order, as the order of different type of transactions over the same account is strict
for _, blockType := range tc.keysTxPreProcs {
if separatedBodies[blockType] == nil {
continue
}
preproc := tc.getPreProcessor(blockType)
if check.IfNil(preproc) {
return process.ErrMissingPreProcessor
}
err := preproc.ProcessBlockTransactions(separatedBodies[blockType], haveTime)
if err != nil {
return err
}
}
return nil
}
// CreateMbsAndProcessCrossShardTransactionsDstMe creates miniblocks and processes cross shard transaction
// with destination of current shard
func (tc *transactionCoordinator) CreateMbsAndProcessCrossShardTransactionsDstMe(
hdr data.HeaderHandler,
processedMiniBlocksHashes map[string]struct{},
maxTxSpaceRemained uint32,
maxMbSpaceRemained uint32,
haveTime func() bool,
) (block.MiniBlockSlice, uint32, bool) {
miniBlocks := make(block.MiniBlockSlice, 0)
nrTxAdded := uint32(0)
nrMiniBlocksProcessed := 0
if hdr == nil || hdr.IsInterfaceNil() {
return miniBlocks, nrTxAdded, true
}
crossMiniBlockHashes := hdr.GetMiniBlockHeadersWithDst(tc.shardCoordinator.SelfId())
for key, senderShardId := range crossMiniBlockHashes {
if !haveTime() {
break
}
_, ok := processedMiniBlocksHashes[key]
if ok {
nrMiniBlocksProcessed++
continue
}
miniVal, _ := tc.miniBlockPool.Peek([]byte(key))
if miniVal == nil {
go tc.onRequestMiniBlock(senderShardId, []byte(key))
continue
}
miniBlock, ok := miniVal.(*block.MiniBlock)
if !ok {
continue
}
preproc := tc.getPreProcessor(miniBlock.Type)
if preproc == nil || preproc.IsInterfaceNil() {
continue
}
// overflow would happen if processing would continue
txOverFlow := nrTxAdded+uint32(len(miniBlock.TxHashes)) > maxTxSpaceRemained
if txOverFlow {
return miniBlocks, nrTxAdded, false
}
requestedTxs := preproc.RequestTransactionsForMiniBlock(miniBlock)
if requestedTxs > 0 {
continue
}
err := tc.processCompleteMiniBlock(preproc, miniBlock, haveTime)
if err != nil {
continue
}
// all txs processed, add to processed miniblocks
miniBlocks = append(miniBlocks, miniBlock)
nrTxAdded = nrTxAdded + uint32(len(miniBlock.TxHashes))
nrMiniBlocksProcessed++
mbOverFlow := uint32(len(miniBlocks)) >= maxMbSpaceRemained
if mbOverFlow {
return miniBlocks, nrTxAdded, false
}
}
allMBsProcessed := nrMiniBlocksProcessed == len(crossMiniBlockHashes)
return miniBlocks, nrTxAdded, allMBsProcessed
}
// CreateMbsAndProcessTransactionsFromMe creates miniblocks and processes transactions from pool
func (tc *transactionCoordinator) CreateMbsAndProcessTransactionsFromMe(
maxTxSpaceRemained uint32,
maxMbSpaceRemained uint32,
haveTime func() bool,
) block.MiniBlockSlice {
miniBlocks := make(block.MiniBlockSlice, 0)
for _, blockType := range tc.keysTxPreProcs {
txPreProc := tc.getPreProcessor(blockType)
if txPreProc == nil || txPreProc.IsInterfaceNil() {
return nil
}
mbs, err := txPreProc.CreateAndProcessMiniBlocks(
maxTxSpaceRemained,
maxMbSpaceRemained,
haveTime,
)
if err != nil {
log.Debug("CreateAndProcessMiniBlocks", "error", err.Error())
}
if len(mbs) > 0 {
miniBlocks = append(miniBlocks, mbs...)
}
}
interMBs := tc.processAddedInterimTransactions()
if len(interMBs) > 0 {
miniBlocks = append(miniBlocks, interMBs...)
}
return miniBlocks
}
func (tc *transactionCoordinator) processAddedInterimTransactions() block.MiniBlockSlice {
miniBlocks := make(block.MiniBlockSlice, 0)
// processing has to be done in order, as the order of different type of transactions over the same account is strict
for _, blockType := range tc.keysInterimProcs {
if blockType == block.RewardsBlock {
// this has to be processed last
continue
}
interimProc := tc.getInterimProcessor(blockType)
if interimProc == nil {
// this will never be reached as keysInterimProcs are the actual keys from the interimMap
continue
}
currMbs := interimProc.CreateAllInterMiniBlocks()
for _, value := range currMbs {
miniBlocks = append(miniBlocks, value)
}
}
return miniBlocks
}
// CreateBlockStarted initializes necessary data for preprocessors at block create or block process
func (tc *transactionCoordinator) CreateBlockStarted() {
tc.gasHandler.Init()
tc.mutPreProcessor.RLock()
for _, value := range tc.txPreProcessors {
value.CreateBlockStarted()
}
tc.mutPreProcessor.RUnlock()
tc.mutInterimProcessors.RLock()
for _, value := range tc.interimProcessors {
value.CreateBlockStarted()
}
tc.mutInterimProcessors.RUnlock()
}
func (tc *transactionCoordinator) getPreProcessor(blockType block.Type) process.PreProcessor {
tc.mutPreProcessor.RLock()
preprocessor, exists := tc.txPreProcessors[blockType]
tc.mutPreProcessor.RUnlock()
if !exists {
return nil
}
return preprocessor
}
func (tc *transactionCoordinator) getInterimProcessor(blockType block.Type) process.IntermediateTransactionHandler {
tc.mutInterimProcessors.RLock()
interProcessor, exists := tc.interimProcessors[blockType]
tc.mutInterimProcessors.RUnlock()
if !exists {
return nil
}
return interProcessor
}
func createBroadcastTopic(shardC sharding.Coordinator, destShId uint32, mbType block.Type) (string, error) {
var baseTopic string
switch mbType {
case block.TxBlock:
baseTopic = factory.TransactionTopic
case block.PeerBlock:
baseTopic = factory.PeerChBodyTopic
case block.SmartContractResultBlock:
baseTopic = factory.UnsignedTransactionTopic
case block.RewardsBlock:
baseTopic = factory.RewardsTransactionTopic
default:
return "", process.ErrUnknownBlockType
}
transactionTopic := baseTopic +
shardC.CommunicationIdentifier(destShId)
return transactionTopic, nil
}
// CreateMarshalizedData creates marshalized data for broadcasting
func (tc *transactionCoordinator) CreateMarshalizedData(body block.Body) (map[uint32]block.MiniBlockSlice, map[string][][]byte) {
mrsTxs := make(map[string][][]byte)
bodies := make(map[uint32]block.MiniBlockSlice)
for i := 0; i < len(body); i++ {
miniblock := body[i]
receiverShardId := miniblock.ReceiverShardID
if receiverShardId == tc.shardCoordinator.SelfId() { // not taking into account miniblocks for current shard
continue
}
broadcastTopic, err := createBroadcastTopic(tc.shardCoordinator, receiverShardId, miniblock.Type)
if err != nil {
log.Trace("createBroadcastTopic", "error", err.Error())
continue
}
appended := false
preproc := tc.getPreProcessor(miniblock.Type)
if preproc != nil && !preproc.IsInterfaceNil() {
bodies[receiverShardId] = append(bodies[receiverShardId], miniblock)
appended = true
currMrsTxs, err := preproc.CreateMarshalizedData(miniblock.TxHashes)
if err != nil {
log.Trace("CreateMarshalizedData", "error", err.Error())
continue
}
if len(currMrsTxs) > 0 {
mrsTxs[broadcastTopic] = append(mrsTxs[broadcastTopic], currMrsTxs...)
}
}
interimProc := tc.getInterimProcessor(miniblock.Type)
if interimProc != nil && !interimProc.IsInterfaceNil() {
if !appended {
bodies[receiverShardId] = append(bodies[receiverShardId], miniblock)
}
currMrsInterTxs, err := interimProc.CreateMarshalizedData(miniblock.TxHashes)
if err != nil {
log.Trace("CreateMarshalizedData", "error", err.Error())
continue
}
if len(currMrsInterTxs) > 0 {
mrsTxs[broadcastTopic] = append(mrsTxs[broadcastTopic], currMrsInterTxs...)
}
}
}
return bodies, mrsTxs
}
// GetAllCurrentUsedTxs returns the cached transaction data for current round
func (tc *transactionCoordinator) GetAllCurrentUsedTxs(blockType block.Type) map[string]data.TransactionHandler {
txPool := make(map[string]data.TransactionHandler, 0)
interTxPool := make(map[string]data.TransactionHandler, 0)
preProc := tc.getPreProcessor(blockType)
if preProc != nil {
txPool = preProc.GetAllCurrentUsedTxs()
}
interProc := tc.getInterimProcessor(blockType)
if interProc != nil {
interTxPool = interProc.GetAllCurrentFinishedTxs()
}
for hash, tx := range interTxPool {
txPool[hash] = tx
}
return txPool
}
// RequestMiniBlocks request miniblocks if missing
func (tc *transactionCoordinator) RequestMiniBlocks(header data.HeaderHandler) {
if header == nil || header.IsInterfaceNil() {
return
}
crossMiniBlockHashes := header.GetMiniBlockHeadersWithDst(tc.shardCoordinator.SelfId())
for key, senderShardId := range crossMiniBlockHashes {
obj, _ := tc.miniBlockPool.Peek([]byte(key))
if obj == nil {
go tc.onRequestMiniBlock(senderShardId, []byte(key))
}
}
}
// receivedMiniBlock is a callback function when a new miniblock was received
// it will further ask for missing transactions
func (tc *transactionCoordinator) receivedMiniBlock(miniBlockHash []byte) {
val, ok := tc.miniBlockPool.Peek(miniBlockHash)
if !ok {
return
}
miniBlock, ok := val.(*block.MiniBlock)
if !ok {
return
}
preproc := tc.getPreProcessor(miniBlock.Type)
if preproc == nil || preproc.IsInterfaceNil() {
return
}
_ = preproc.RequestTransactionsForMiniBlock(miniBlock)
}
// processMiniBlockComplete - all transactions must be processed together, otherwise error
func (tc *transactionCoordinator) processCompleteMiniBlock(
preproc process.PreProcessor,
miniBlock *block.MiniBlock,
haveTime func() bool,
) error {
snapshot := tc.accounts.JournalLen()
err := preproc.ProcessMiniBlock(miniBlock, haveTime)
if err != nil {
log.Debug("ProcessMiniBlock", "error", err.Error())
errAccountState := tc.accounts.RevertToSnapshot(snapshot)
if errAccountState != nil {
// TODO: evaluate if reloading the trie from disk will might solve the problem
log.Debug("RevertToSnapshot", "error", errAccountState.Error())
}
return err
}
return nil
}
// VerifyCreatedBlockTransactions checks whether the created transactions are the same as the one proposed
func (tc *transactionCoordinator) VerifyCreatedBlockTransactions(hdr data.HeaderHandler, body block.Body) error {
tc.mutInterimProcessors.RLock()
defer tc.mutInterimProcessors.RUnlock()
errMutex := sync.Mutex{}
var errFound error
wg := sync.WaitGroup{}
wg.Add(len(tc.interimProcessors))
for _, interimProc := range tc.interimProcessors {
go func(intermediateProcessor process.IntermediateTransactionHandler) {
err := intermediateProcessor.VerifyInterMiniBlocks(body)
if err != nil {
errMutex.Lock()
errFound = err
errMutex.Unlock()
}
wg.Done()
}(interimProc)
}
wg.Wait()
if errFound != nil {
return errFound
}
if check.IfNil(hdr) {
return process.ErrNilBlockHeader
}
createdReceiptHash, err := tc.CreateReceiptsHash()
if err != nil {
return err
}
if !bytes.Equal(createdReceiptHash, hdr.GetReceiptsHash()) {
return process.ErrReceiptsHashMissmatch
}
return nil
}
func (tc *transactionCoordinator) CreateReceiptsHash() ([]byte, error) {
allReceiptsHashes := make([]byte, 0)
for _, value := range tc.keysInterimProcs {
interProc, ok := tc.interimProcessors[value]
if !ok {
continue
}
mb := interProc.GetCreatedInShardMiniBlock()
currHash, err := core.CalculateHash(tc.marshalizer, tc.hasher, mb)
if err != nil {
return nil, err
}
allReceiptsHashes = append(allReceiptsHashes, currHash...)
}
finalReceiptHash, err := core.CalculateHash(tc.marshalizer, tc.hasher, allReceiptsHashes)
return finalReceiptHash, err
}
// IsInterfaceNil returns true if there is no value under the interface
func (tc *transactionCoordinator) IsInterfaceNil() bool {
return tc == nil
}