demo-config flag (#3473)

* democonfig

* 3.2

beacon-chain/node/node.go

@@ -82,9 +82,11 @@ func NewBeaconNode(ctx *cli.Context) (*BeaconNode, error) {
 	// Use custom config values if the --no-custom-config flag is set.
 	if !ctx.GlobalBool(flags.NoCustomConfigFlag.Name) {
 		log.Info("Using custom parameter configuration")
-		// TODO(3439): Conditionally use demo config?
-		// params.UseDemoBeaconConfig()
-		params.UseMinimalConfig()
+		if featureconfig.FeatureConfig().DemoConfig {
+			params.UseDemoBeaconConfig()
+		} else {
+			params.UseMinimalConfig()
+		}
 	}
 
 	featureconfig.ConfigureBeaconFeatures(ctx)

shared/featureconfig/config.go

@@ -26,6 +26,7 @@ var log = logrus.WithField("prefix", "flags")
 // FeatureFlagConfig is a struct to represent what features the client will perform on runtime.
 type FeatureFlagConfig struct {
 	NoGenesisDelay bool // NoGenesisDelay when processing a chain start genesis event.
+	DemoConfig     bool // DemoConfig with lower deposit thresholds.
 
 	// Cache toggles.
 	EnableActiveBalanceCache bool // EnableActiveBalanceCache; see https://github.com/prysmaticlabs/prysm/issues/3106.

shared/featureconfig/flags.go

@@ -10,6 +10,11 @@ var (
 		Name:  "no-genesis-delay",
 		Usage: "Process genesis event 30s after the ETH1 block time, rather than wait to midnight of the next day.",
 	}
+	// DemoConfigFlag enables the demo configuration.
+	DemoConfigFlag = cli.BoolFlag{
+		Name:        "demo-config",
+		Usage:       "Use demo config with lower deposit thresholds.",
+	}
 	// EnableActiveBalanceCacheFlag see https://github.com/prysmaticlabs/prysm/issues/3106.
 	EnableActiveBalanceCacheFlag = cli.BoolFlag{
 		Name:  "enable-active-balance-cache",
@@ -48,11 +53,14 @@ var (
 )
 
 // ValidatorFlags contains a list of all the feature flags that apply to the validator client.
-var ValidatorFlags = []cli.Flag{}
+var ValidatorFlags = []cli.Flag{
+	DemoConfigFlag,
+}
 
 // BeaconChainFlags contains a list of all the feature flags that apply to the beacon-chain client.
 var BeaconChainFlags = []cli.Flag{
 	NoGenesisDelayFlag,
+	DemoConfigFlag,
 	EnableActiveBalanceCacheFlag,
 	EnableAttestationCacheFlag,
 	EnableAncestorBlockCacheFlag,

shared/params/config.go

@@ -82,7 +82,6 @@ type BeaconChainConfig struct {
 
 	// Prysm constants.
 	GweiPerEth                uint64        // GweiPerEth is the amount of gwei corresponding to 1 eth.
-	SyncPollingInterval       int64         // SyncPollingInterval queries network nodes for sync status.
 	LogBlockDelay             int64         // Number of blocks to wait from the current head before processing logs from the deposit contract.
 	BLSPubkeyLength           int           // BLSPubkeyLength defines the expected length of BLS public keys in bytes.
 	DefaultBufferSize         int           // DefaultBufferSize for channels across the Prysm repository.
@@ -228,11 +227,9 @@ func MainnetConfig() *BeaconChainConfig {
 func DemoBeaconConfig() *BeaconChainConfig {
 	demoConfig := MinimalSpecConfig()
 	demoConfig.MinDepositAmount = 100
-	demoConfig.MaxEffectiveBalance = 32 * 1e9
+	demoConfig.MaxEffectiveBalance = 3.2 * 1e9
 	demoConfig.EjectionBalance = 1.6 * 1e9
 	demoConfig.EffectiveBalanceIncrement = 0.1 * 1e9
-	demoConfig.SyncPollingInterval = 1 * 10 // Query nodes over the network every slot.
-	demoConfig.MinGenesisTime = 0
 	demoConfig.Eth1FollowDistance = 16
 
 	return demoConfig

validator/node/node.go

@@ -59,7 +59,11 @@ func NewValidatorClient(ctx *cli.Context, keys map[string]*keystore.Key) (*Valid
 	// Use custom config values if the --no-custom-config flag is set.
 	if !ctx.GlobalBool(flags.NoCustomConfigFlag.Name) {
 		log.Info("Using custom parameter configuration")
-		params.UseDemoBeaconConfig()
+		if featureconfig.FeatureConfig().DemoConfig {
+			params.UseDemoBeaconConfig()
+		} else {
+			params.UseMinimalConfig()
+		}
 	}
 
 	featureconfig.ConfigureBeaconFeatures(ctx)