chore: Add keygen CLI (#278)

Co-authored-by: mace <[email protected]>

cli/cli.go

@@ -8,6 +8,7 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 
+	"github.com/ChainSafe/sygma-relayer/cli/keygen"
 	"github.com/ChainSafe/sygma-relayer/cli/peer"
 	"github.com/ChainSafe/sygma-relayer/cli/topology"
 	"github.com/ChainSafe/sygma-relayer/cli/utils"
@@ -30,7 +31,7 @@ func init() {
 }
 
 func Execute() {
-	rootCMD.AddCommand(runCMD, peer.PeerCLI, topology.TopologyCLI, utils.UtilsCLI)
+	rootCMD.AddCommand(runCMD, peer.PeerCLI, topology.TopologyCLI, utils.UtilsCLI, keygen.KeygenCLI)
 	if err := rootCMD.Execute(); err != nil {
 		log.Fatal().Err(err).Msg("failed to execute root cmd")
 	}

cli/keygen/cli.go

@@ -0,0 +1,17 @@
+// The Licensed Work is (c) 2022 Sygma
+// SPDX-License-Identifier: LGPL-3.0-only
+
+package keygen
+
+import (
+	"github.com/spf13/cobra"
+)
+
+var KeygenCLI = &cobra.Command{
+	Use:   "keygen",
+	Short: "Key generation",
+}
+
+func init() {
+	KeygenCLI.AddCommand(generateKeyCMD)
+}

cli/keygen/generateKey.go

@@ -0,0 +1,34 @@
+// The Licensed Work is (c) 2022 Sygma
+// SPDX-License-Identifier: LGPL-3.0-only
+
+package keygen
+
+import (
+	"encoding/hex"
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/sygmaprotocol/sygma-core/crypto/secp256k1"
+)
+
+var (
+	generateKeyCMD = &cobra.Command{
+		Use:   "gen-key",
+		Short: "Generate keys for signing transactions",
+		Long:  "Generate keys for signing transactions",
+		RunE:  generateKey,
+	}
+)
+
+func generateKey(cmd *cobra.Command, args []string) error {
+	kp, err := secp256k1.GenerateKeypair()
+	if err != nil {
+		return err
+	}
+
+	privHex := hex.EncodeToString(kp.Encode())
+
+	fmt.Printf("Public key: %s\n", kp.PublicKey())
+	fmt.Printf("Private key: 0x%s\n", privHex)
+	return nil
+}

docs/general/CLI.md

@@ -2,7 +2,7 @@
 
 ### Introduction
 
-This guide details specific Command Line Interface (CLI) commands for the Sygma relayer, focusing on functionalities provided in the `topology`, `peer`, and `utils` modules.
+This guide details specific Command Line Interface (CLI) commands for the Sygma relayer, focusing on functionalities provided in the `topology`, `peer`, `keygen` and `utils` modules.
 
 ## Topology commands
 
@@ -52,6 +52,16 @@ Calculate a libp2p peer ID from the provided base64 encoded libp2p private key.
 #### Flags:
 - `--private-key`: Base64 encoded libp2p private key.
 
+## Keygen commands
+
+### Generate ECDSA keypair
+
+#### Usage: 
+`./sygma-relayer keygen gen-key`
+
+#### Description:
+Generate a 256-bit ECDSA keypair and print it out. This keypair can be used as a relayer's execution keypair.
+
 ## Other util commands
 
 ### Derivate SS58 Command (utils)