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miniblockResolver.go
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/
miniblockResolver.go
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package resolvers
import (
"fmt"
"github.com/multiversx/mx-chain-core-go/core"
"github.com/multiversx/mx-chain-core-go/core/check"
"github.com/multiversx/mx-chain-core-go/data/batch"
"github.com/multiversx/mx-chain-go/dataRetriever"
"github.com/multiversx/mx-chain-go/p2p"
"github.com/multiversx/mx-chain-go/storage"
logger "github.com/multiversx/mx-chain-logger-go"
)
var _ dataRetriever.Resolver = (*miniblockResolver)(nil)
// ArgMiniblockResolver is the argument structure used to create a new miniblockResolver instance
type ArgMiniblockResolver struct {
ArgBaseResolver
MiniBlockPool storage.Cacher
MiniBlockStorage storage.Storer
DataPacker dataRetriever.DataPacker
IsFullHistoryNode bool
}
// miniblockResolver is a wrapper over Resolver that is specialized in resolving miniblocks requests
// TODO extract common functionality between this and transactionResolver
type miniblockResolver struct {
*baseResolver
messageProcessor
baseStorageResolver
miniBlockPool storage.Cacher
dataPacker dataRetriever.DataPacker
}
// NewMiniblockResolver creates a miniblock resolver
func NewMiniblockResolver(arg ArgMiniblockResolver) (*miniblockResolver, error) {
err := checkArgMiniblockResolver(arg)
if err != nil {
return nil, err
}
mbResolver := &miniblockResolver{
baseResolver: &baseResolver{
TopicResolverSender: arg.SenderResolver,
},
miniBlockPool: arg.MiniBlockPool,
baseStorageResolver: createBaseStorageResolver(arg.MiniBlockStorage, arg.IsFullHistoryNode),
dataPacker: arg.DataPacker,
messageProcessor: messageProcessor{
marshalizer: arg.Marshaller,
antifloodHandler: arg.AntifloodHandler,
topic: arg.SenderResolver.RequestTopic(),
throttler: arg.Throttler,
},
}
return mbResolver, nil
}
func checkArgMiniblockResolver(arg ArgMiniblockResolver) error {
err := checkArgBase(arg.ArgBaseResolver)
if err != nil {
return err
}
if check.IfNil(arg.MiniBlockPool) {
return dataRetriever.ErrNilMiniblocksPool
}
if check.IfNil(arg.MiniBlockStorage) {
return dataRetriever.ErrNilMiniblocksStorage
}
if check.IfNil(arg.DataPacker) {
return dataRetriever.ErrNilDataPacker
}
return nil
}
// ProcessReceivedMessage will be the callback func from the p2p.Messenger and will be called each time a new message was received
// (for the topic this validator was registered to, usually a request topic)
func (mbRes *miniblockResolver) ProcessReceivedMessage(message p2p.MessageP2P, fromConnectedPeer core.PeerID, source p2p.MessageHandler) error {
err := mbRes.canProcessMessage(message, fromConnectedPeer)
if err != nil {
return err
}
mbRes.throttler.StartProcessing()
defer mbRes.throttler.EndProcessing()
rd, err := mbRes.parseReceivedMessage(message, fromConnectedPeer)
if err != nil {
return err
}
switch rd.Type {
case dataRetriever.HashType:
err = mbRes.resolveMbRequestByHash(rd.Value, message.Peer(), rd.Epoch, source)
case dataRetriever.HashArrayType:
err = mbRes.resolveMbRequestByHashArray(rd.Value, message.Peer(), rd.Epoch, source)
default:
err = dataRetriever.ErrRequestTypeNotImplemented
}
if err != nil {
err = fmt.Errorf("%w for hash %s", err, logger.DisplayByteSlice(rd.Value))
}
return err
}
func (mbRes *miniblockResolver) resolveMbRequestByHash(hash []byte, pid core.PeerID, epoch uint32, source p2p.MessageHandler) error {
mb, err := mbRes.fetchMbAsByteSlice(hash, epoch)
if err != nil {
return err
}
b := &batch.Batch{
Data: [][]byte{mb},
}
buffToSend, err := mbRes.marshalizer.Marshal(b)
if err != nil {
return err
}
return mbRes.Send(buffToSend, pid, source)
}
func (mbRes *miniblockResolver) fetchMbAsByteSlice(hash []byte, epoch uint32) ([]byte, error) {
value, ok := mbRes.miniBlockPool.Peek(hash)
if ok {
return mbRes.marshalizer.Marshal(value)
}
buff, err := mbRes.getFromStorage(hash, epoch)
if err != nil {
mbRes.DebugHandler().LogFailedToResolveData(
mbRes.topic,
hash,
err,
)
return nil, err
}
mbRes.DebugHandler().LogSucceededToResolveData(mbRes.topic, hash)
return buff, nil
}
func (mbRes *miniblockResolver) resolveMbRequestByHashArray(mbBuff []byte, pid core.PeerID, epoch uint32, source p2p.MessageHandler) error {
b := batch.Batch{}
err := mbRes.marshalizer.Unmarshal(&b, mbBuff)
if err != nil {
return err
}
hashes := b.Data
var errFetch error
errorsFound := 0
mbsBuffSlice := make([][]byte, 0, len(hashes))
for _, hash := range hashes {
mb, errTemp := mbRes.fetchMbAsByteSlice(hash, epoch)
if errTemp != nil {
errFetch = fmt.Errorf("%w for hash %s", errTemp, logger.DisplayByteSlice(hash))
log.Trace("fetchMbAsByteSlice missing",
"error", errFetch.Error(),
"hash", hash)
errorsFound++
continue
}
mbsBuffSlice = append(mbsBuffSlice, mb)
}
buffsToSend, errPack := mbRes.dataPacker.PackDataInChunks(mbsBuffSlice, maxBuffToSendBulkMiniblocks)
if errPack != nil {
return errPack
}
for _, buff := range buffsToSend {
errSend := mbRes.Send(buff, pid, source)
if errSend != nil {
return errSend
}
}
if errFetch != nil {
errFetch = fmt.Errorf("resolveMbRequestByHashArray last error %w from %d encountered errors", errFetch, errorsFound)
}
return errFetch
}
// IsInterfaceNil returns true if there is no value under the interface
func (mbRes *miniblockResolver) IsInterfaceNil() bool {
return mbRes == nil
}