Add flags to support new database, new sync (#3252)

shared/featureconfig/config.go

@@ -30,6 +30,8 @@ type FeatureFlagConfig struct {
 	EnableExcessDeposits          bool // EnableExcessDeposits in validator balances.
 	NoGenesisDelay                bool // NoGenesisDelay when processing a chain start genesis event.
 	UseNewP2P                     bool // UseNewP2P service.
+	UseNewSync                    bool // UseNewSync services.
+	UseNewDatabase                bool // UseNewDatabase service.
 
 	// Cache toggles.
 	EnableActiveBalanceCache bool // EnableActiveBalanceCache; see https://github.com/prysmaticlabs/prysm/issues/3106.
@@ -72,10 +74,18 @@ func ConfigureBeaconFeatures(ctx *cli.Context) {
 		log.Warn("Using non standard genesis delay. This may cause problems in a multi-node environment.")
 		cfg.NoGenesisDelay = true
 	}
-	if ctx.GlobalBool(UseNewP2PFlag.Name) {
+	if ctx.GlobalBool(NextFlag.Name) || ctx.GlobalBool(UseNewP2PFlag.Name) {
 		log.Warn("Using new P2P service.")
 		cfg.UseNewP2P = true
 	}
+	if ctx.GlobalBool(NextFlag.Name) || ctx.GlobalBool(UseNewSyncFlag.Name) {
+		log.Warn("Using new sync services.")
+		cfg.UseNewSync = true
+	}
+	if ctx.GlobalBool(NextFlag.Name) || ctx.GlobalBool(UseNewDatabaseFlag.Name) {
+		log.Warn("Using new database service.")
+		cfg.UseNewDatabase = true
+	}
 	if ctx.GlobalBool(EnableActiveBalanceCacheFlag.Name) {
 		log.Warn("Enabled unsafe active balance cache")
 		cfg.EnableActiveBalanceCache = true

shared/featureconfig/flags.go

@@ -36,6 +36,21 @@ var (
 		Name:  "experimental-p2p",
 		Usage: "Use the new experimental p2p library. See issue #3147.",
 	}
+	// UseNewSyncFlag to start the beacon chain using the new sync library.
+	UseNewSyncFlag = cli.BoolFlag{
+		Name:  "experimental-sync",
+		Usage: "Use the new experimental sync libraries. See issue #3147.",
+	}
+	// UseNewDatabaseFlag to start the beacon chain using new database library.
+	UseNewDatabaseFlag = cli.BoolFlag{
+		Name:  "experimental-db",
+		Usage: "Use the new experimental database library.",
+	}
+	// NextFlag to enable all experimental features.
+	NextFlag = cli.BoolFlag{
+		Name:  "next",
+		Usage: "Use next version experimental features.",
+	}
 	// EnableActiveBalanceCacheFlag see https://github.com/prysmaticlabs/prysm/issues/3106.
 	EnableActiveBalanceCacheFlag = cli.BoolFlag{
 		Name:  "enable-active-balance-cache",
@@ -84,6 +99,9 @@ var BeaconChainFlags = []cli.Flag{
 	EnableExcessDepositsFlag,
 	NoGenesisDelayFlag,
 	UseNewP2PFlag,
+	UseNewSyncFlag,
+	UseNewDatabaseFlag,
+	NextFlag,
 	EnableActiveBalanceCacheFlag,
 	EnableAttestationCacheFlag,
 	EnableAncestorBlockCacheFlag,