disable beacon protocol in epoch 7 (#5083)

## Motivation
disable beacon protocol until #4989 and #4583 are fixed

## Changes
set RoundsNumber == 0 to disable beacon protocol and not listen to beacon gossip

## TODO
- [x] Update [changelog](../CHANGELOG.md) as needed
- [x] test on devnet-406-short

CHANGELOG.md

@@ -47,6 +47,7 @@ In order to enable provide following configuration:
 * [#5032](https://github.com/spacemeshos/go-spacemesh/pull/5032) Ativeset data pruned from ballots.
 * [#5035](https://github.com/spacemeshos/go-spacemesh/pull/5035) Fix possible nil pointer panic when node fails to persist nipost builder state.
 * [#5079](https://github.com/spacemeshos/go-spacemesh/pull/5079) increase atx cache to 50 000 to reduce disk reads.
+* [#5083](https://github.com/spacemeshos/go-spacemesh/pull/5083) Disable beacon protocol temporarily.
 
 ## v1.1.5
 

beacon/beacon.go

@@ -231,13 +231,16 @@ func (pd *ProtocolDriver) setMetricsRegistry(registry *prometheus.Registry) {
 // Start starts listening for layers and outputs.
 func (pd *ProtocolDriver) Start(ctx context.Context) {
 	pd.startOnce.Do(func() {
-		pd.logger.With().Info("starting beacon protocol", log.String("config", fmt.Sprintf("%+v", pd.config)))
 		if pd.sync == nil {
 			pd.logger.Fatal("update sync state provider can't be nil")
 		}
-
 		pd.metricsCollector.Start(nil)
 
+		if pd.config.RoundsNumber == 0 {
+			pd.logger.Info("beacon protocol disabled")
+			return
+		}
+		pd.logger.With().Info("starting beacon protocol", log.String("config", fmt.Sprintf("%+v", pd.config)))
 		pd.setProposalTimeForNextEpoch()
 		pd.eg.Go(func() error {
 			pd.listenEpochs(ctx)

config/mainnet.go

@@ -115,7 +115,7 @@ func MainnetConfig() Config {
 			GracePeriodDuration:      10 * time.Minute,
 			ProposalDuration:         4 * time.Minute,
 			FirstVotingRoundDuration: 30 * time.Minute,
-			RoundsNumber:             300,
+			RoundsNumber:             0,
 			VotingRoundDuration:      4 * time.Minute,
 			WeakCoinRoundDuration:    4 * time.Minute,
 			VotesLimit:               100,

node/node.go

@@ -916,10 +916,12 @@ func (app *App) initServices(ctx context.Context) error {
 		return errors.New("not synced for gossip")
 	}
 
-	app.host.Register(pubsub.BeaconWeakCoinProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleWeakCoinProposal), pubsub.WithValidatorInline(true))
-	app.host.Register(pubsub.BeaconProposalProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleProposal), pubsub.WithValidatorInline(true))
-	app.host.Register(pubsub.BeaconFirstVotesProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleFirstVotes), pubsub.WithValidatorInline(true))
-	app.host.Register(pubsub.BeaconFollowingVotesProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleFollowingVotes), pubsub.WithValidatorInline(true))
+	if app.Config.Beacon.RoundsNumber > 0 {
+		app.host.Register(pubsub.BeaconWeakCoinProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleWeakCoinProposal), pubsub.WithValidatorInline(true))
+		app.host.Register(pubsub.BeaconProposalProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleProposal), pubsub.WithValidatorInline(true))
+		app.host.Register(pubsub.BeaconFirstVotesProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleFirstVotes), pubsub.WithValidatorInline(true))
+		app.host.Register(pubsub.BeaconFollowingVotesProtocol, pubsub.ChainGossipHandler(syncHandler, beaconProtocol.HandleFollowingVotes), pubsub.WithValidatorInline(true))
+	}
 	app.host.Register(pubsub.ProposalProtocol, pubsub.ChainGossipHandler(syncHandler, proposalListener.HandleProposal))
 	app.host.Register(pubsub.AtxProtocol, pubsub.ChainGossipHandler(atxSyncHandler, atxHandler.HandleGossipAtx))
 	app.host.Register(pubsub.TxProtocol, pubsub.ChainGossipHandler(syncHandler, app.txHandler.HandleGossipTransaction))