Embedded mainnet genesis state + load genesis.ssz from file (#8614)

* Update rules_go and fix proto conflicts

* gaz

* Update generated code

* First pass inclusion of using baked states

* more emptypb fixes

* remove testnet genesis files, only embed mainnet

* Refactoring for SaveGenesisData, fix tests that use mainnet config but do not support mainnet genesis values

* a bit more refactoring, load genesis from a file. Needs tests still

* Add method to ensure an embedded genesis file also has the appropriate genesis block

* gofmt

* more clear error

* Check genesis fork version to ensure testnet config matches genesis file

* viz

* test for SaveGenesisData

* More genesis db method tests

* Merge

* Minor tweaks, lint, fmt, etc

* Add more test to genesis db methods

* Revert beacon-chain/state/stateV0/BUILD.bazel

* Update beacon-chain/db/iface/errors.go

Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>

* PR feedback

* Update beacon-chain/db/kv/genesis.go

Co-authored-by: terence tsao <terence@prysmaticlabs.com>

* fmt.Errorf works better for nil errors

Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
Co-authored-by: terence tsao <terence@prysmaticlabs.com>

cmd/beacon-chain/flags/base.go

@@ -166,4 +166,10 @@ var (
 		Usage: "Sets the maximum number of headers that a deposit log query can fetch.",
 		Value: uint64(1000),
 	}
+	// GenesisStatePath defines a flag to start the beacon chain from a give genesis state file.
+	GenesisStatePath = &cli.StringFlag{
+		Name: "genesis-state",
+		Usage: "Load a genesis state from ssz file. Testnet genesis files can be found in the " +
+			"eth2-clients/eth2-testnets repository on github.",
+	}
 )

cmd/beacon-chain/flags/interop.go

@@ -7,8 +7,10 @@ import (
 var (
 	// InteropGenesisStateFlag defines a flag for the beacon node to load genesis state via file.
 	InteropGenesisStateFlag = &cli.StringFlag{
-		Name:  "interop-genesis-state",
-		Usage: "The genesis state file (.SSZ) to load from",
+		Name: "interop-genesis-state",
+		Usage: "The genesis state file (.SSZ) to load from. Note: loading from an interop genesis " +
+			"state does not use a web3 connection to read any deposits. This interop " +
+			"functionality should not be used with public testnets.",
 	}
 	// InteropMockEth1DataVotesFlag enables mocking the eth1 proof-of-work chain data put into blocks by proposers.
 	InteropMockEth1DataVotesFlag = &cli.BoolFlag{

cmd/beacon-chain/main.go

@@ -60,6 +60,7 @@ var appFlags = []cli.Flag{
 	flags.NetworkID,
 	flags.WeakSubjectivityCheckpt,
 	flags.Eth1HeaderReqLimit,
+	flags.GenesisStatePath,
 	cmd.EnableBackupWebhookFlag,
 	cmd.BackupWebhookOutputDir,
 	cmd.MinimalConfigFlag,

cmd/beacon-chain/usage.go

@@ -119,6 +119,7 @@ var appHelpFlagGroups = []flagGroup{
 			flags.NetworkID,
 			flags.WeakSubjectivityCheckpt,
 			flags.Eth1HeaderReqLimit,
+			flags.GenesisStatePath,
 		},
 	},
 	{