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pendingMiniBlocks.go
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/
pendingMiniBlocks.go
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package pendingMb
import (
"fmt"
"sync"
"github.com/ElrondNetwork/elrond-go-core/core"
"github.com/ElrondNetwork/elrond-go-core/core/check"
"github.com/ElrondNetwork/elrond-go-core/data"
"github.com/ElrondNetwork/elrond-go-logger"
"github.com/ElrondNetwork/elrond-go/process"
)
var _ process.PendingMiniBlocksHandler = (*pendingMiniBlocks)(nil)
var log = logger.GetOrCreate("process/block/pendingMb")
type pendingMiniBlocks struct {
mutPendingMbShard sync.RWMutex
mapPendingMbShard map[string]uint32
beforeRevertPendingMbShard map[string]uint32
}
// NewPendingMiniBlocks will create a new pendingMiniBlocks object
func NewPendingMiniBlocks() (*pendingMiniBlocks, error) {
return &pendingMiniBlocks{
mapPendingMbShard: make(map[string]uint32),
beforeRevertPendingMbShard: make(map[string]uint32),
}, nil
}
func (p *pendingMiniBlocks) getAllCrossShardMiniBlocksHashes(metaBlock data.MetaHeaderHandler) map[string]uint32 {
crossShardMiniBlocks := make(map[string]uint32)
for _, mbHeader := range metaBlock.GetMiniBlockHeaderHandlers() {
if !shouldConsiderCrossShardMiniBlock(mbHeader.GetSenderShardID(), mbHeader.GetReceiverShardID()) {
continue
}
crossShardMiniBlocks[string(mbHeader.GetHash())] = mbHeader.GetReceiverShardID()
}
shardInfoHandlers := metaBlock.GetShardInfoHandlers()
for _, shardData := range shardInfoHandlers {
miniblockHandlers := shardData.GetShardMiniBlockHeaderHandlers()
for _, mbHeader := range miniblockHandlers {
if !shouldConsiderCrossShardMiniBlock(mbHeader.GetSenderShardID(), mbHeader.GetReceiverShardID()) {
continue
}
crossShardMiniBlocks[string(mbHeader.GetHash())] = mbHeader.GetReceiverShardID()
}
}
return crossShardMiniBlocks
}
func shouldConsiderCrossShardMiniBlock(senderShardID uint32, receiverShardID uint32) bool {
if senderShardID == receiverShardID {
return false
}
if senderShardID != core.MetachainShardId && receiverShardID == core.MetachainShardId {
return false
}
if senderShardID == core.MetachainShardId && receiverShardID == core.AllShardId {
return false
}
return true
}
// AddProcessedHeader will add in pending list all miniblocks hashes from a given metablock
func (p *pendingMiniBlocks) AddProcessedHeader(headerHandler data.HeaderHandler) error {
if check.IfNil(headerHandler) {
return process.ErrNilHeaderHandler
}
metaHandler, ok := headerHandler.(data.MetaHeaderHandler)
if !ok {
return fmt.Errorf("%w in pendingMiniBlocks.AddProcessedHeader", process.ErrWrongTypeAssertion)
}
log.Trace("AddProcessedHeader",
"shard", metaHandler.GetShardID(),
"epoch", metaHandler.GetEpoch(),
"round", metaHandler.GetRound(),
"nonce", metaHandler.GetNonce(),
"is start of epoch", metaHandler.IsStartOfEpochBlock(),
)
if metaHandler.IsStartOfEpochBlock() {
return p.processStartOfEpochMeta(metaHandler)
}
return p.processHeader(metaHandler)
}
// RevertHeader will remove from pending list all miniblocks hashes from a given metablock
func (p *pendingMiniBlocks) RevertHeader(headerHandler data.HeaderHandler) error {
if check.IfNil(headerHandler) {
return process.ErrNilHeaderHandler
}
metaHandler, ok := headerHandler.(data.MetaHeaderHandler)
if !ok {
return fmt.Errorf("%w in pendingMiniBlocks.RevertHeader", process.ErrWrongTypeAssertion)
}
log.Trace("RevertHeader",
"shard", metaHandler.GetShardID(),
"epoch", metaHandler.GetEpoch(),
"round", metaHandler.GetRound(),
"nonce", metaHandler.GetNonce(),
"is start of epoch", metaHandler.IsStartOfEpochBlock(),
)
if metaHandler.IsStartOfEpochBlock() {
p.revertStartOfEpochMeta()
return nil
}
return p.processHeader(metaHandler)
}
func (p *pendingMiniBlocks) processHeader(metaHandler data.MetaHeaderHandler) error {
crossShardMiniBlocksHashes := p.getAllCrossShardMiniBlocksHashes(metaHandler)
p.mutPendingMbShard.Lock()
defer p.mutPendingMbShard.Unlock()
for mbHash, shardID := range crossShardMiniBlocksHashes {
_, ok := p.mapPendingMbShard[mbHash]
if !ok {
p.mapPendingMbShard[mbHash] = shardID
continue
}
delete(p.mapPendingMbShard, mbHash)
}
p.displayPendingMb()
return nil
}
func (p *pendingMiniBlocks) processStartOfEpochMeta(metaHandler data.MetaHeaderHandler) error {
p.mutPendingMbShard.Lock()
defer p.mutPendingMbShard.Unlock()
p.performBackup()
return p.recreateMap(metaHandler)
}
func (p *pendingMiniBlocks) performBackup() {
p.beforeRevertPendingMbShard = make(map[string]uint32)
for hash, shardID := range p.mapPendingMbShard {
p.beforeRevertPendingMbShard[hash] = shardID
}
}
func (p *pendingMiniBlocks) recreateMap(metaHandler data.MetaHeaderHandler) error {
p.mapPendingMbShard = make(map[string]uint32)
epochStartHandler := metaHandler.GetEpochStartHandler()
lastFinalizedHeaders := epochStartHandler.GetLastFinalizedHeaderHandlers()
for _, hdr := range lastFinalizedHeaders {
pendingMiniBlocksHeaders := hdr.GetPendingMiniBlockHeaderHandlers()
for _, mbh := range pendingMiniBlocksHeaders {
if !shouldConsiderCrossShardMiniBlock(mbh.GetSenderShardID(), mbh.GetReceiverShardID()) {
continue
}
p.mapPendingMbShard[string(mbh.GetHash())] = mbh.GetReceiverShardID()
}
}
return nil
}
func (p *pendingMiniBlocks) revertStartOfEpochMeta() {
p.mutPendingMbShard.Lock()
defer p.mutPendingMbShard.Unlock()
p.mapPendingMbShard = make(map[string]uint32)
for hash, shardID := range p.beforeRevertPendingMbShard {
p.mapPendingMbShard[hash] = shardID
}
}
// GetPendingMiniBlocks will return the pending miniblocks hashes for a given shard
func (p *pendingMiniBlocks) GetPendingMiniBlocks(shardID uint32) [][]byte {
p.mutPendingMbShard.RLock()
defer p.mutPendingMbShard.RUnlock()
pendingMiniBlocksToReturn := make([][]byte, 0)
for mbHash, mbShardID := range p.mapPendingMbShard {
if mbShardID != shardID {
continue
}
pendingMiniBlocksToReturn = append(pendingMiniBlocksToReturn, []byte(mbHash))
}
if len(pendingMiniBlocksToReturn) == 0 {
return nil
}
return pendingMiniBlocksToReturn
}
// SetPendingMiniBlocks will set the pending miniblocks hashes for a given shard
func (p *pendingMiniBlocks) SetPendingMiniBlocks(shardID uint32, mbHashes [][]byte) {
p.mutPendingMbShard.Lock()
defer p.mutPendingMbShard.Unlock()
for _, mbHash := range mbHashes {
p.mapPendingMbShard[string(mbHash)] = shardID
}
}
// IsInterfaceNil returns true if there is no value under the interface
func (p *pendingMiniBlocks) IsInterfaceNil() bool {
return p == nil
}
func (p *pendingMiniBlocks) displayPendingMb() {
mapShardNumPendingMb := make(map[uint32]int)
for mbHash, shardID := range p.mapPendingMbShard {
mapShardNumPendingMb[shardID]++
log.Trace("pending miniblocks", "shard", shardID, "hash", []byte(mbHash))
}
for shardID, num := range mapShardNumPendingMb {
log.Debug("pending miniblocks", "shard", shardID, "num", num)
}
}