Implement beacon committee selections (#13503)

* implement beacon committee selections

* fix build

* fix lint

* fix lint

* Update beacon-chain/rpc/eth/shared/structs.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update validator/client/beacon-api/beacon_committee_selections.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update validator/client/beacon-api/beacon_committee_selections.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* Update validator/client/beacon-api/beacon_committee_selections.go

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

* move beacon committee selection structs to validator module

* fix bazel build files

* add support for POST and GET endpoints for get state validators query

* add a handler to return error from beacon node

* move beacon committee selection to validator top-level module

* fix bazel

* re-arrange fields to fix lint

* fix TestServer_InitializeRoutes

* fix build and lint

* fix build and lint

* fix TestSubmitAggregateAndProof_Distributed

---------

Co-authored-by: Radosław Kapka <rkapka@wp.pl>

cmd/validator/flags/flags.go

@@ -377,6 +377,13 @@ var (
 		Usage: "Sets the maximum size for one batch of validator registrations. Use a non-positive value to disable batching.",
 		Value: 0,
 	}
+
+	// EnableDistributed enables the usage of prysm validator client in a Distributed Validator Cluster.
+	EnableDistributed = &cli.BoolFlag{
+		Name:  "distributed",
+		Usage: "To enable the use of prysm validator client in Distributed Validator Cluster",
+		Value: false,
+	}
 )
 
 // DefaultValidatorDir returns OS-specific default validator directory.

cmd/validator/main.go

@@ -74,6 +74,7 @@ var appFlags = []cli.Flag{
 	flags.WalletDirFlag,
 	flags.EnableWebFlag,
 	flags.GraffitiFileFlag,
+	flags.EnableDistributed,
 	// Consensys' Web3Signer flags
 	flags.Web3SignerURLFlag,
 	flags.Web3SignerPublicValidatorKeysFlag,

cmd/validator/usage.go

@@ -122,6 +122,7 @@ var appHelpFlagGroups = []flagGroup{
 			flags.EnableBuilderFlag,
 			flags.BuilderGasLimitFlag,
 			flags.ValidatorsRegistrationBatchSizeFlag,
+			flags.EnableDistributed,
 		},
 	},
 	{