--chain-config-file: Do not use any more mainnet boot nodes. (#15460)

config/features/config.go

@@ -156,7 +156,8 @@ func configureTestnet(ctx *cli.Context) error {
 		params.UseHoodiNetworkConfig()
 	} else {
 		if ctx.IsSet(cmd.ChainConfigFileFlag.Name) {
-			log.Warn("Running on custom Ethereum network specified in a chain configuration yaml file")
+			log.Warning("Running on custom Ethereum network specified in a chain configuration YAML file")
+			params.UseCustomNetworkConfig()
 		} else {
 			log.Info("Running on Ethereum Mainnet")
 		}
@@ -168,11 +169,11 @@ func configureTestnet(ctx *cli.Context) error {
 }
 
 // Insert feature flags within the function to be enabled for Sepolia testnet.
-func applySepoliaFeatureFlags(ctx *cli.Context) {
+func applySepoliaFeatureFlags(_ *cli.Context) {
 }
 
 // Insert feature flags within the function to be enabled for Holesky testnet.
-func applyHoleskyFeatureFlags(ctx *cli.Context) {
+func applyHoleskyFeatureFlags(_ *cli.Context) {
 }
 
 // ConfigureBeaconChain sets the global config based

config/params/BUILD.bazel

@@ -14,6 +14,7 @@ go_library(
         "mainnet_config.go",
         "minimal_config.go",
         "network_config.go",
+        "testnet_custom_network_config.go",
         "testnet_e2e_config.go",
         "testnet_holesky_config.go",
         "testnet_hoodi_config.go",

config/params/testnet_custom_network_config.go

@@ -0,0 +1,9 @@
+package params
+
+func UseCustomNetworkConfig() {
+	cfg := BeaconNetworkConfig().Copy()
+	cfg.ContractDeploymentBlock = 0
+	cfg.BootstrapNodes = []string{}
+
+	OverrideBeaconNetworkConfig(cfg)
+}