Add Sepolia config (#10868)

config/features/config.go

@@ -123,13 +123,15 @@ func configureTestnet(ctx *cli.Context) error {
 		if err := params.SetActive(params.RopstenConfig().Copy()); err != nil {
 			return err
 		}
-		if err := ctx.Set(enableVecHTR.Names()[0], "true"); err != nil {
+		applyRopstenFeatureFlags(ctx)
-			log.WithError(err).Debug("error enabling vectorized HTR flag")
-		}
-		if err := ctx.Set(enableForkChoiceDoublyLinkedTree.Names()[0], "true"); err != nil {
-			log.WithError(err).Debug("error enabling doubly linked tree forkchoice flag")
-		}
 		params.UseRopstenNetworkConfig()
+	} else if ctx.Bool(SepoliaTestnet.Name) {
+		log.Warn("Running on the Sepolia Beacon Chain Testnet")
+		if err := params.SetActive(params.SepoliaConfig().Copy()); err != nil {
+			return err
+		}
+		applySepoliaFeatureFlags(ctx)
+		params.UseSepoliaNetworkConfig()
 	} else {
 		if ctx.IsSet(cmd.ChainConfigFileFlag.Name) {
 			log.Warn("Running on custom Ethereum network specified in a chain configuration yaml file")
@@ -143,6 +145,26 @@ func configureTestnet(ctx *cli.Context) error {
 	return nil
 }
 
+// Insert feature flags within the function to be enabled for Ropsten testnet.
+func applyRopstenFeatureFlags(ctx *cli.Context) {
+	if err := ctx.Set(enableVecHTR.Names()[0], "true"); err != nil {
+		log.WithError(err).Debug("error enabling vectorized HTR flag")
+	}
+	if err := ctx.Set(enableForkChoiceDoublyLinkedTree.Names()[0], "true"); err != nil {
+		log.WithError(err).Debug("error enabling doubly linked tree forkchoice flag")
+	}
+}
+
+// Insert feature flags within the function to be enabled for Sepolia testnet.
+func applySepoliaFeatureFlags(ctx *cli.Context) {
+	if err := ctx.Set(enableVecHTR.Names()[0], "true"); err != nil {
+		log.WithError(err).Debug("error enabling vectorized HTR flag")
+	}
+	if err := ctx.Set(enableForkChoiceDoublyLinkedTree.Names()[0], "true"); err != nil {
+		log.WithError(err).Debug("error enabling doubly linked tree forkchoice flag")
+	}
+}
+
 // ConfigureBeaconChain sets the global config based
 // on what flags are enabled for the beacon-chain client.
 func ConfigureBeaconChain(ctx *cli.Context) error {

config/features/flags.go

@@ -17,6 +17,11 @@ var (
 		Name:  "ropsten",
 		Usage: "Run Prysm configured for the Ropsten beacon chain test network",
 	}
+	// SepoliaTestnet flag for the multiclient Ethereum consensus testnet.
+	SepoliaTestnet = &cli.BoolFlag{
+		Name:  "sepolia",
+		Usage: "Run Prysm configured for the Sepolia beacon chain test network",
+	}
 	// Mainnet flag for easier tooling, no-op
 	Mainnet = &cli.BoolFlag{
 		Value: true,

config/params/BUILD.bazel

@@ -17,6 +17,7 @@ go_library(
         "testnet_e2e_config.go",
         "testnet_prater_config.go",
         "testnet_ropsten_config.go",
+        "testnet_sepolia_config.go",
         "testutils.go",
         "values.go",
     ],

config/params/testnet_sepolia_config.go

@@ -0,0 +1,37 @@
+package params
+
+import (
+	eth1Params "github.com/ethereum/go-ethereum/params"
+)
+
+// UseSepoliaNetworkConfig uses the Sepolia beacon chain specific network config.
+func UseSepoliaNetworkConfig() {
+	cfg := BeaconNetworkConfig().Copy()
+	cfg.ContractDeploymentBlock = 1273020
+	cfg.BootstrapNodes = []string{
+		// EF boot node
+		"enr:-Iq4QMCTfIMXnow27baRUb35Q8iiFHSIDBJh6hQM5Axohhf4b6Kr_cOCu0htQ5WvVqKvFgY28893DHAg8gnBAXsAVqmGAX53x8JggmlkgnY0gmlwhLKAlv6Jc2VjcDI1NmsxoQK6S-Cii_KmfFdUJL2TANL3ksaKUnNXvTCv1tLwXs0QgIN1ZHCCIyk",
+	}
+	OverrideBeaconNetworkConfig(cfg)
+}
+
+// SepoliaConfig defines the config for the Sepolia beacon chain testnet.
+func SepoliaConfig() *BeaconChainConfig {
+	cfg := MainnetConfig().Copy()
+	cfg.MinGenesisTime = 1655647200
+	cfg.GenesisDelay = 86400
+	cfg.MinGenesisActiveValidatorCount = 1300
+	cfg.ConfigName = SepoliaName
+	cfg.GenesisForkVersion = []byte{0x90, 0x00, 0x00, 0x69}
+	cfg.SecondsPerETH1Block = 14
+	cfg.DepositChainID = eth1Params.SepoliaChainConfig.ChainID.Uint64()
+	cfg.DepositNetworkID = eth1Params.SepoliaChainConfig.ChainID.Uint64()
+	cfg.AltairForkEpoch = 50
+	cfg.AltairForkVersion = []byte{0x90, 0x00, 0x00, 0x70}
+	cfg.BellatrixForkEpoch = 100
+	cfg.BellatrixForkVersion = []byte{0x90, 0x00, 0x00, 0x71}
+	cfg.TerminalTotalDifficulty = "100000000000000000000000"
+	cfg.DepositContractAddress = "0x7f02C3E3c98b133055B8B348B2Ac625669Ed295D"
+	cfg.InitializeForkSchedule()
+	return cfg
+}

config/params/values.go

@@ -10,4 +10,5 @@ const (
 	MinimalName         = "minimal"
 	PraterName          = "prater"
 	RopstenName         = "ropsten"
+	SepoliaName         = "sepolia"
 )