adding configs for aura api

cmd/geth/chaincmd.go

@@ -136,6 +136,7 @@ The export-preimages command export hash preimages to an RLP encoded stream`,
 			utils.FakePoWFlag,
 			utils.TestnetFlag,
 			utils.RinkebyFlag,
+			utils.GoerliFlag,
 		},
 		Category: "BLOCKCHAIN COMMANDS",
 		Description: `

cmd/utils/flags.go

@@ -34,6 +34,7 @@ import (
 	"github.com/ethereum/go-ethereum/common/fdlimit"
 	"github.com/ethereum/go-ethereum/consensus"
 	"github.com/ethereum/go-ethereum/consensus/clique"
+	"github.com/ethereum/go-ethereum/consensus/aura"
 	"github.com/ethereum/go-ethereum/consensus/ethash"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/state"
@@ -144,7 +145,7 @@ var (
 		Name:  "dev",
 		Usage: "Ephemeral proof-of-authority network with a pre-funded developer account, mining enabled",
 	}
-	GoerliFLag = cli.BoolFlag{
+	GoerliFlag = cli.BoolFlag{
 		Name: "goerli",
 		Usage: "Goerli network: pre-configured proof-of-authority test network",
 	}
@@ -1368,6 +1369,8 @@ func MakeChain(ctx *cli.Context, stack *node.Node) (chain *core.BlockChain, chai
 	var engine consensus.Engine
 	if config.Clique != nil {
 		engine = clique.New(config.Clique, chainDb)
+	} else if config.Aura != nil {
+		engine = aura.New(config.Aura, chainDb)
 	} else {
 		engine = ethash.NewFaker()
 		if !ctx.GlobalBool(FakePoWFlag.Name) {

consensus/aura/aura.go

@@ -218,7 +218,7 @@ func New(config *params.CliqueConfig, db ethdb.Database) *Clique {
 	recents, _ := lru.NewARC(inmemorySnapshots)
 	signatures, _ := lru.NewARC(inmemorySignatures)
 
-	return &Clique{
+	return &Aura{
 		config:     &conf,
 		db:         db,
 		recents:    recents,
@@ -693,9 +693,9 @@ func (c *Aura) Close() error {
 // controlling the signer voting.
 func (c *Aura) APIs(chain consensus.ChainReader) []rpc.API {
 	return []rpc.API{{
-		Namespace: "clique",
+		Namespace: "aura",
 		Version:   "1.0",
-		Service:   &API{chain: chain, clique: c},
+		Service:   &API{chain: chain, aura: c},
 		Public:    false,
 	}}
 }