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fullSyncRequestersContainerFactory.go
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/
fullSyncRequestersContainerFactory.go
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package factory
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/core/random"
"github.com/multiversx/mx-chain-core-go/marshal"
"github.com/multiversx/mx-chain-go/common"
"github.com/multiversx/mx-chain-go/dataRetriever"
"github.com/multiversx/mx-chain-go/dataRetriever/factory/resolverscontainer"
"github.com/multiversx/mx-chain-go/dataRetriever/requestHandlers/requesters"
"github.com/multiversx/mx-chain-go/dataRetriever/topicSender"
"github.com/multiversx/mx-chain-go/epochStart/bootstrap/disabled"
"github.com/multiversx/mx-chain-go/p2p"
"github.com/multiversx/mx-chain-go/process/factory"
"github.com/multiversx/mx-chain-go/sharding"
"github.com/multiversx/mx-chain-go/update"
)
const (
numCrossShardPeers = 2
numIntraShardPeers = 2
numFullHistoryPeers = 3
)
type requestersContainerFactory struct {
shardCoordinator sharding.Coordinator
mainMessenger p2p.Messenger
fullArchiveMessenger p2p.Messenger
marshaller marshal.Marshalizer
intRandomizer dataRetriever.IntRandomizer
container dataRetriever.RequestersContainer
outputAntifloodHandler dataRetriever.P2PAntifloodHandler
peersRatingHandler dataRetriever.PeersRatingHandler
}
// ArgsRequestersContainerFactory defines the arguments for the requestersContainerFactory constructor
type ArgsRequestersContainerFactory struct {
ShardCoordinator sharding.Coordinator
MainMessenger p2p.Messenger
FullArchiveMessenger p2p.Messenger
Marshaller marshal.Marshalizer
ExistingRequesters dataRetriever.RequestersContainer
OutputAntifloodHandler dataRetriever.P2PAntifloodHandler
PeersRatingHandler dataRetriever.PeersRatingHandler
}
// NewRequestersContainerFactory creates a new container filled with topic requesters
func NewRequestersContainerFactory(args ArgsRequestersContainerFactory) (*requestersContainerFactory, error) {
if check.IfNil(args.ShardCoordinator) {
return nil, update.ErrNilShardCoordinator
}
if check.IfNil(args.MainMessenger) {
return nil, fmt.Errorf("%w on main network", update.ErrNilMessenger)
}
if check.IfNil(args.FullArchiveMessenger) {
return nil, fmt.Errorf("%w on full archive network", update.ErrNilMessenger)
}
if check.IfNil(args.Marshaller) {
return nil, update.ErrNilMarshalizer
}
if check.IfNil(args.ExistingRequesters) {
return nil, update.ErrNilRequestersContainer
}
if check.IfNil(args.OutputAntifloodHandler) {
return nil, update.ErrNilAntiFloodHandler
}
if check.IfNil(args.PeersRatingHandler) {
return nil, update.ErrNilPeersRatingHandler
}
return &requestersContainerFactory{
shardCoordinator: args.ShardCoordinator,
mainMessenger: args.MainMessenger,
fullArchiveMessenger: args.FullArchiveMessenger,
marshaller: args.Marshaller,
intRandomizer: &random.ConcurrentSafeIntRandomizer{},
container: args.ExistingRequesters,
outputAntifloodHandler: args.OutputAntifloodHandler,
peersRatingHandler: args.PeersRatingHandler,
}, nil
}
// Create returns a requesters container that will hold all requesters in the system
func (rcf *requestersContainerFactory) Create() (dataRetriever.RequestersContainer, error) {
err := rcf.generateTrieNodesRequesters()
if err != nil {
return nil, err
}
return rcf.container, nil
}
func (rcf *requestersContainerFactory) generateTrieNodesRequesters() error {
shardC := rcf.shardCoordinator
keys := make([]string, 0)
requestersSlice := make([]dataRetriever.Requester, 0)
for i := uint32(0); i < shardC.NumberOfShards(); i++ {
identifierTrieNodes := factory.AccountTrieNodesTopic + core.CommunicationIdentifierBetweenShards(i, core.MetachainShardId)
if rcf.checkIfRequesterExists(identifierTrieNodes) {
continue
}
requester, err := rcf.createTrieNodesRequester(identifierTrieNodes, i)
if err != nil {
return err
}
requestersSlice = append(requestersSlice, requester)
keys = append(keys, identifierTrieNodes)
}
identifierTrieNodes := factory.AccountTrieNodesTopic + core.CommunicationIdentifierBetweenShards(core.MetachainShardId, core.MetachainShardId)
if !rcf.checkIfRequesterExists(identifierTrieNodes) {
requester, err := rcf.createTrieNodesRequester(identifierTrieNodes, core.MetachainShardId)
if err != nil {
return err
}
requestersSlice = append(requestersSlice, requester)
keys = append(keys, identifierTrieNodes)
}
identifierTrieNodes = factory.ValidatorTrieNodesTopic + core.CommunicationIdentifierBetweenShards(core.MetachainShardId, core.MetachainShardId)
if !rcf.checkIfRequesterExists(identifierTrieNodes) {
requester, err := rcf.createTrieNodesRequester(identifierTrieNodes, core.MetachainShardId)
if err != nil {
return err
}
requestersSlice = append(requestersSlice, requester)
keys = append(keys, identifierTrieNodes)
}
return rcf.container.AddMultiple(keys, requestersSlice)
}
func (rcf *requestersContainerFactory) checkIfRequesterExists(topic string) bool {
_, err := rcf.container.Get(topic)
return err == nil
}
func (rcf *requestersContainerFactory) createTrieNodesRequester(baseTopic string, targetShardID uint32) (dataRetriever.Requester, error) {
// for each requester we create a pseudo-intra shard topic as to make at least of half of the requests target the proper peers
// this pseudo-intra shard topic is the consensus_targetShardID
targetShardCoordinator, err := sharding.NewMultiShardCoordinator(rcf.shardCoordinator.NumberOfShards(), targetShardID)
if err != nil {
return nil, err
}
targetConsensusTopic := common.ConsensusTopic + targetShardCoordinator.CommunicationIdentifier(targetShardID)
peerListCreator, err := topicsender.NewDiffPeerListCreator(
rcf.mainMessenger,
baseTopic,
targetConsensusTopic,
resolverscontainer.EmptyExcludePeersOnTopic,
)
if err != nil {
return nil, err
}
arg := topicsender.ArgTopicRequestSender{
ArgBaseTopicSender: topicsender.ArgBaseTopicSender{
MainMessenger: rcf.mainMessenger,
FullArchiveMessenger: rcf.fullArchiveMessenger,
TopicName: baseTopic,
OutputAntiflooder: rcf.outputAntifloodHandler,
MainPreferredPeersHolder: disabled.NewPreferredPeersHolder(),
FullArchivePreferredPeersHolder: disabled.NewPreferredPeersHolder(),
TargetShardId: defaultTargetShardID,
},
Marshaller: rcf.marshaller,
Randomizer: rcf.intRandomizer,
PeerListCreator: peerListCreator,
NumIntraShardPeers: numIntraShardPeers,
NumCrossShardPeers: numCrossShardPeers,
NumFullHistoryPeers: numFullHistoryPeers,
CurrentNetworkEpochProvider: disabled.NewCurrentNetworkEpochProviderHandler(),
SelfShardIdProvider: rcf.shardCoordinator,
PeersRatingHandler: rcf.peersRatingHandler,
}
requestSender, err := topicsender.NewTopicRequestSender(arg)
if err != nil {
return nil, err
}
argTrieRequester := requesters.ArgTrieNodeRequester{
ArgBaseRequester: requesters.ArgBaseRequester{
RequestSender: requestSender,
Marshaller: rcf.marshaller,
},
}
return requesters.NewTrieNodeRequester(argTrieRequester)
}
// IsInterfaceNil returns true if there is no value under the interface
func (rcf *requestersContainerFactory) IsInterfaceNil() bool {
return rcf == nil
}