refactor: move --generate-key to a generate-key subcommand

cmd/waku/flags.go

@@ -115,16 +115,6 @@ var (
 		Destination: &options.KeyPasswd,
 		EnvVars:     []string{"WAKUNODE2_KEY_PASSWORD"},
 	})
-	GenerateKey = altsrc.NewBoolFlag(&cli.BoolFlag{
-		Name:        "generate-key",
-		Usage:       "Generate private key file at path specified in --key-file with the password defined by --key-password",
-		Destination: &options.GenerateKey,
-	})
-	Overwrite = altsrc.NewBoolFlag(&cli.BoolFlag{
-		Name:        "overwrite",
-		Usage:       "When generating a keyfile, overwrite the nodekey file if it already exists",
-		Destination: &options.Overwrite,
-	})
 	StaticNode = cliutils.NewGenericFlagMultiValue(&cli.GenericFlag{
 		Name:  "staticnode",
 		Usage: "Multiaddr of peer to directly connect with. Option may be repeated",

cmd/waku/keygen/command.go

@@ -0,0 +1,80 @@
+package keygen
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/ethereum/go-ethereum/accounts/keystore"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/urfave/cli/v2"
+	"github.com/waku-org/go-waku/waku/v2/utils"
+	"go.uber.org/zap"
+)
+
+// Command generates a key file used to generate the node's peerID, encrypted with an optional password
+var Command = cli.Command{
+	Name:  "generate-key",
+	Usage: "Generate private key file at path specified in --key-file with the password defined by --key-password",
+	Action: func(cCtx *cli.Context) error {
+		if err := generateKeyFile(Options.KeyFile, []byte(Options.KeyPasswd), Options.Overwrite); err != nil {
+			utils.Logger().Fatal("could not write keyfile", zap.Error(err))
+		}
+		return nil
+	},
+	Flags: []cli.Flag{
+		KeyFile,
+		KeyPassword,
+		Overwrite,
+	},
+}
+
+func checkForFileExistence(path string, overwrite bool) error {
+	_, err := os.Stat(path)
+
+	if err == nil && !overwrite {
+		return fmt.Errorf("%s already exists. Use --overwrite to overwrite the file", path)
+	}
+
+	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+
+	return nil
+}
+
+func generatePrivateKey() ([]byte, error) {
+	key, err := crypto.GenerateKey()
+	if err != nil {
+		return nil, err
+	}
+
+	return key.D.Bytes(), nil
+}
+
+func writeKeyFile(path string, key []byte, passwd []byte) error {
+	encryptedK, err := keystore.EncryptDataV3(key, passwd, keystore.StandardScryptN, keystore.StandardScryptP)
+	if err != nil {
+		return err
+	}
+
+	output, err := json.Marshal(encryptedK)
+	if err != nil {
+		return err
+	}
+
+	return os.WriteFile(path, output, 0600)
+}
+
+func generateKeyFile(path string, passwd []byte, overwrite bool) error {
+	if err := checkForFileExistence(path, overwrite); err != nil {
+		return err
+	}
+
+	key, err := generatePrivateKey()
+	if err != nil {
+		return err
+	}
+
+	return writeKeyFile(path, key, passwd)
+}

cmd/waku/keygen/flags.go

@@ -0,0 +1,35 @@
+package keygen
+
+import (
+	cli "github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
+)
+
+// Options contain the settings used for generating a key file
+var Options GenerateKeyOptions
+
+var (
+	// KeyFile is a flag that contains the path where the node key will be written
+	KeyFile = altsrc.NewPathFlag(&cli.PathFlag{
+		Name:        "key-file",
+		Value:       "./nodekey",
+		Usage:       "Path to a file containing the private key for the P2P node",
+		Destination: &Options.KeyFile,
+		EnvVars:     []string{"WAKUNODE2_KEY_FILE"},
+	})
+	// KeyPassword is a flag to set the password used to encrypt the file
+	KeyPassword = altsrc.NewStringFlag(&cli.StringFlag{
+		Name:        "key-password",
+		Value:       "secret",
+		Usage:       "Password used for the private key file",
+		Destination: &Options.KeyPasswd,
+		EnvVars:     []string{"WAKUNODE2_KEY_PASSWORD"},
+	})
+	// Overwrite is a flag used to overwrite an existing key file
+	Overwrite = altsrc.NewBoolFlag(&cli.BoolFlag{
+		Name:        "overwrite",
+		Value:       false,
+		Usage:       "Overwrite the nodekey file if it already exists",
+		Destination: &Options.Overwrite,
+	})
+)

cmd/waku/keygen/options.go

@@ -0,0 +1,9 @@
+package keygen
+
+// GenerateKeyOptions contains all the settings that can be used when generating
+// a keyfile with the generate-key command
+type GenerateKeyOptions struct {
+	KeyFile   string
+	KeyPasswd string
+	Overwrite bool
+}

cmd/waku/main.go

@@ -5,10 +5,11 @@ import (
 
 	cli "github.com/urfave/cli/v2"
 	"github.com/urfave/cli/v2/altsrc"
+	"github.com/waku-org/go-waku/cmd/waku/keygen"
 	"github.com/waku-org/go-waku/waku/v2/node"
 )
 
-var options Options
+var options NodeOptions
 
 func main() {
 	// Defaults
@@ -31,8 +32,6 @@ func main() {
 		NodeKey,
 		KeyFile,
 		KeyPassword,
-		GenerateKey,
-		Overwrite,
 		StaticNode,
 		KeepAlive,
 		PersistPeers,
@@ -111,6 +110,9 @@ func main() {
 			Execute(options)
 			return nil
 		},
+		Commands: []*cli.Command{
+			&keygen.Command,
+		},
 	}
 
 	err := app.Run(os.Args)

cmd/waku/node.go

@@ -63,7 +63,7 @@ func failOnErr(err error, msg string) {
 	}
 }
 
-func requiresDB(options Options) bool {
+func requiresDB(options NodeOptions) bool {
 	return options.Store.Enable || options.Rendezvous.Enable
 }
 
@@ -82,14 +82,7 @@ func scalePerc(value float64) float64 {
 const dialTimeout = 7 * time.Second
 
 // Execute starts a go-waku node with settings determined by the Options parameter
-func Execute(options Options) {
-	if options.GenerateKey {
-		if err := writePrivateKeyToFile(options.KeyFile, []byte(options.KeyPasswd), options.Overwrite); err != nil {
-			failOnErr(err, "nodekey error")
-		}
-		return
-	}
-
+func Execute(options NodeOptions) {
 	hostAddr, err := net.ResolveTCPAddr("tcp", fmt.Sprintf("%s:%d", options.Address, options.Port))
 	failOnErr(err, "invalid host address")
 
@@ -527,53 +520,7 @@ func loadPrivateKeyFromFile(path string, passwd string) (*ecdsa.PrivateKey, erro
 	return crypto.ToECDSA(pKey)
 }
 
-func checkForFileExistence(path string, overwrite bool) error {
-	_, err := os.Stat(path)
-
-	if err == nil && !overwrite {
-		return fmt.Errorf("%s already exists. Use --overwrite to overwrite the file", path)
-	}
-
-	if err := os.Remove(path); err != nil && !os.IsNotExist(err) {
-		return err
-	}
-
-	return nil
-}
-
-func generatePrivateKey() ([]byte, error) {
-	key, err := crypto.GenerateKey()
-	if err != nil {
-		return nil, err
-	}
-
-	return key.D.Bytes(), nil
-}
-
-func writePrivateKeyToFile(path string, passwd []byte, overwrite bool) error {
-	if err := checkForFileExistence(path, overwrite); err != nil {
-		return err
-	}
-
-	key, err := generatePrivateKey()
-	if err != nil {
-		return err
-	}
-
-	encryptedK, err := keystore.EncryptDataV3(key, passwd, keystore.StandardScryptN, keystore.StandardScryptP)
-	if err != nil {
-		return err
-	}
-
-	output, err := json.Marshal(encryptedK)
-	if err != nil {
-		return err
-	}
-
-	return os.WriteFile(path, output, 0600)
-}
-
-func getPrivKey(options Options) (*ecdsa.PrivateKey, error) {
+func getPrivKey(options NodeOptions) (*ecdsa.PrivateKey, error) {
 	var prvKey *ecdsa.PrivateKey
 	// get private key from nodeKey or keyFile
 	if options.NodeKey != nil {
@@ -596,7 +543,7 @@ func getPrivKey(options Options) (*ecdsa.PrivateKey, error) {
 	return prvKey, nil
 }
 
-func printListeningAddresses(ctx context.Context, nodeOpts []node.WakuNodeOption, options Options) {
+func printListeningAddresses(ctx context.Context, nodeOpts []node.WakuNodeOption, options NodeOptions) {
 	params := new(node.WakuNodeParameters)
 	for _, opt := range nodeOpts {
 		err := opt(params)

cmd/waku/node_no_rln.go

@@ -8,6 +8,6 @@ import (
 	"go.uber.org/zap"
 )
 
-func checkForRLN(logger *zap.Logger, options Options, nodeOpts *[]node.WakuNodeOption) {
+func checkForRLN(logger *zap.Logger, options NodeOptions, nodeOpts *[]node.WakuNodeOption) {
 	// Do nothing
 }

cmd/waku/node_rln.go

@@ -12,7 +12,7 @@ import (
 	"go.uber.org/zap"
 )
 
-func checkForRLN(logger *zap.Logger, options Options, nodeOpts *[]node.WakuNodeOption) {
+func checkForRLN(logger *zap.Logger, options NodeOptions, nodeOpts *[]node.WakuNodeOption) {
 	if options.RLNRelay.Enable {
 		if !options.Relay.Enable {
 			failOnErr(errors.New("relay not available"), "Could not enable RLN Relay")

cmd/waku/options.go

@@ -142,17 +142,15 @@ type RendezvousOptions struct {
 	Nodes  []multiaddr.Multiaddr
 }
 
-// Options contains all the available features and settings that can be
+// NodeOptions contains all the available features and settings that can be
 // configured via flags when executing go-waku as a service.
-type Options struct {
+type NodeOptions struct {
 	Port                         int
 	Address                      string
 	DNS4DomainName               string
 	NodeKey                      *ecdsa.PrivateKey
 	KeyFile                      string
 	KeyPasswd                    string
-	GenerateKey                  bool
-	Overwrite                    bool
 	StaticNodes                  []multiaddr.Multiaddr
 	KeepAlive                    time.Duration
 	AdvertiseAddresses           []multiaddr.Multiaddr