cmd/geth: add support for sepolia testnet (ethereum#23730)

* cmd/geth: add support for sepolia testnet

* core: last details on sepolia genesis

* params: fix sepolia hash + reduce testing code

* Update params/bootnodes.go

* cmd/geth: fix attach path for sepolia

* params: update bootnodes

* params: fix

* core: fix docstring

* params: add sepolia CHT

cmd/geth/dbcmd.go

@@ -187,9 +187,6 @@ WARNING: This is a low-level operation which may cause database corruption!`,
 			utils.DataDirFlag,
 			utils.SyncModeFlag,
 			utils.MainnetFlag,
-			utils.RopstenFlag,
-			utils.RinkebyFlag,
-			utils.GoerliFlag,
 		},
 		Description: "The import command imports the specific chain data from an RLP encoded stream.",
 	}
@@ -202,9 +199,6 @@ WARNING: This is a low-level operation which may cause database corruption!`,
 			utils.DataDirFlag,
 			utils.SyncModeFlag,
 			utils.MainnetFlag,
-			utils.RopstenFlag,
-			utils.RinkebyFlag,
-			utils.GoerliFlag,
 		},
 		Description: "Exports the specified chain data to an RLP encoded stream, optionally gzip-compressed.",
 	}

cmd/utils/flags.go

@@ -147,6 +147,10 @@ var (
 		Name:  "testnet",
 		Usage: "Testnet network: pre-configured proof-of-authority shortlived test network.",
 	}
+	SepoliaFlag = cli.BoolFlag{
+		Name:  "sepolia",
+		Usage: "Sepolia network: pre-configured proof-of-work test network",
+	}
 	DeveloperFlag = cli.BoolFlag{
 		Name:  "dev",
 		Usage: "Ephemeral proof-of-authority network with a pre-funded developer account, mining enabled",
@@ -782,6 +786,9 @@ func MakeDataDir(ctx *cli.Context) string {
 		if ctx.GlobalBool(TestnetFlag.Name) {
 			return filepath.Join(path, "testnet")
 		}
+		if ctx.GlobalBool(SepoliaFlag.Name) {
+			return filepath.Join(path, "sepolia")
+		}
 		return path
 	}
 	Fatalf("Cannot determine default data directory, please set manually (--datadir)")

core/genesis_test.go

@@ -153,21 +153,22 @@ func TestSetupGenesis(t *testing.T) {
 	}
 }
 
-// TestGenesisHashes checks the congruity of default genesis data to corresponding hardcoded genesis hash values.
+// TestGenesisHashes checks the congruity of default genesis data to
+// corresponding hardcoded genesis hash values.
 func TestGenesisHashes(t *testing.T) {
-	cases := []struct {
+	for i, c := range []struct {
 		genesis *Genesis
-		hash    common.Hash
+		want    common.Hash
 	}{
-		{
-			genesis: DefaultGenesisBlock(),
-			hash:    params.MainnetGenesisHash,
-		},
-	}
-	for i, c := range cases {
-		b := c.genesis.MustCommit(rawdb.NewMemoryDatabase())
-		if got := b.Hash(); got != c.hash {
-			t.Errorf("case: %d, want: %s, got: %s", i, c.hash.Hex(), got.Hex())
+		{DefaultGenesisBlock(), params.MainnetGenesisHash},
+	} {
+		// Test via MustCommit
+		if have := c.genesis.MustCommit(rawdb.NewMemoryDatabase()).Hash(); have != c.want {
+			t.Errorf("case: %d a), want: %s, got: %s", i, c.want.Hex(), have.Hex())
+		}
+		// Test via ToBlock
+		if have := c.genesis.ToBlock(nil).Hash(); have != c.want {
+			t.Errorf("case: %d a), want: %s, got: %s", i, c.want.Hex(), have.Hex())
 		}
 	}
 }