Merge pull request #10 from bcdevtools/imp/support-mnemonic-as-secret-key

imp: support mnemonic as account secret

Author: 0xbcdev

cmd/tx/evm.go

@@ -5,6 +5,7 @@ import (
 	"crypto/ecdsa"
 	"fmt"
 	"os"
+	"regexp"
 	"strings"
 
 	"github.com/bcdevtools/devd/v2/cmd/utils"
@@ -64,17 +65,28 @@ func mustSecretEvmAccount(cmd *cobra.Command) (privKey string, ecdsaPrivateKey *
 		os.Exit(1)
 	}
 
-	privKey = strings.TrimPrefix(privKey, "0x")
-
-	pKeyBytes, err := hexutil.Decode("0x" + privKey)
-	if err != nil {
-		utils.PrintlnStdErr("ERR: failed to decode secret key")
-		os.Exit(1)
-	}
-
-	ecdsaPrivateKey, err = crypto.ToECDSA(pKeyBytes)
-	if err != nil {
-		utils.PrintlnStdErr("ERR: failed to convert secret key to ECDSA")
+	if regexp.MustCompile(`^(0x)?[a-fA-F\d]{64}$`).MatchString(privKey) {
+		// private key
+		privKey = strings.TrimPrefix(privKey, "0x")
+
+		pKeyBytes, err := hexutil.Decode("0x" + privKey)
+		if err != nil {
+			utils.PrintlnStdErr("ERR: failed to decode private key")
+			os.Exit(1)
+		}
+
+		ecdsaPrivateKey, err = crypto.ToECDSA(pKeyBytes)
+		if err != nil {
+			utils.PrintlnStdErr("ERR: failed to convert private key to ECDSA")
+			os.Exit(1)
+		}
+	} else if mnemonicCount := len(strings.Split(privKey, " ")); mnemonicCount == 12 || mnemonicCount == 24 {
+		// is mnemonic
+		mnemonic := privKey
+		ecdsaPrivateKey, err = utils.FromMnemonicToPrivateKey(mnemonic, "" /*no password protected*/)
+		utils.ExitOnErr(err, "failed to convert mnemonic to private key")
+	} else {
+		utils.PrintlnStdErr("ERR: invalid secret key format")
 		os.Exit(1)
 	}
 

cmd/tx/root.go

@@ -12,7 +12,7 @@ const (
 
 const (
 	flagEvmRpcDesc    = "EVM Json-RPC endpoint, default is " + constants.DEFAULT_EVM_RPC + ", can be set by environment variable " + constants.ENV_EVM_RPC
-	flagSecretKeyDesc = "Secret key of the account, can be set by environment variable " + constants.ENV_SECRET_KEY
+	flagSecretKeyDesc = "Secret private key or mnemonic of the account, can be set by environment variable " + constants.ENV_SECRET_KEY
 )
 
 // Commands registers a sub-tree of commands

cmd/utils/account_util.go

@@ -0,0 +1,48 @@
+package utils
+
+import (
+	"crypto/ecdsa"
+
+	"github.com/btcsuite/btcd/btcutil/hdkeychain"
+	"github.com/btcsuite/btcd/chaincfg"
+	cosmoshd "github.com/cosmos/cosmos-sdk/crypto/hd"
+	"github.com/cosmos/go-bip39"
+	"github.com/ethereum/go-ethereum/accounts"
+)
+
+func FromMnemonicToPrivateKey(mnemonic, password string) (*ecdsa.PrivateKey, error) {
+	hdPathStr := cosmoshd.CreateHDPath(60, 0, 0).String()
+	hdPath, err := accounts.ParseDerivationPath(hdPathStr)
+	if err != nil {
+		return nil, err
+	}
+
+	seed, err := bip39.NewSeedWithErrorChecking(mnemonic, password)
+	if err != nil {
+		return nil, err
+	}
+
+	// create a BTC-utils hd-derivation key chain
+	masterKey, err := hdkeychain.NewMaster(seed, &chaincfg.MainNetParams)
+	if err != nil {
+		return nil, err
+	}
+
+	key := masterKey
+	for _, n := range hdPath {
+		key, err = key.Derive(n)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	// btc-utils representation of a secp256k1 private key
+	privateKey, err := key.ECPrivKey()
+	if err != nil {
+		return nil, err
+	}
+
+	// cast private key to a convertible form (single scalar field element of secp256k1)
+	// and then load into ethcrypto private key format.
+	return privateKey.ToECDSA(), nil
+}

go.mod

@@ -3,13 +3,16 @@ module github.com/bcdevtools/devd/v2
 go 1.20
 
 require (
+	github.com/btcsuite/btcd v0.24.2
+	github.com/btcsuite/btcd/btcutil v1.1.5
 	github.com/cometbft/cometbft v0.37.4
 	github.com/cosmos/cosmos-sdk v0.47.10
+	github.com/cosmos/go-bip39 v1.0.0
 	github.com/ethereum/go-ethereum v1.10.26
 	github.com/pkg/errors v0.9.1
 	github.com/shirou/gopsutil/v3 v3.24.3
 	github.com/spf13/cobra v1.7.0
-	github.com/stretchr/testify v1.9.0
+	github.com/stretchr/testify v1.10.0
 	golang.org/x/exp v0.0.0-20230711153332-06a737ee72cb
 )
 
@@ -20,6 +23,7 @@ require (
 	github.com/VictoriaMetrics/fastcache v1.6.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/btcsuite/btcd/btcec/v2 v2.3.2 // indirect
+	github.com/btcsuite/btcd/chaincfg/chainhash v1.1.0 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/cometbft/cometbft-db v0.7.0 // indirect
@@ -29,6 +33,7 @@ require (
 	github.com/cosmos/gogoproto v1.4.10 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/deckarep/golang-set v1.8.0 // indirect
+	github.com/decred/dcrd/crypto/blake256 v1.1.0 // indirect
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0 // indirect
 	github.com/dgraph-io/badger/v2 v2.2007.4 // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
@@ -90,10 +95,10 @@ require (
 	github.com/tklauser/numcpus v0.6.1 // indirect
 	github.com/yusufpapurcu/wmi v1.2.4 // indirect
 	go.etcd.io/bbolt v1.3.7 // indirect
-	golang.org/x/crypto v0.22.0 // indirect
+	golang.org/x/crypto v0.32.0 // indirect
 	golang.org/x/net v0.21.0 // indirect
-	golang.org/x/sys v0.19.0 // indirect
-	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20240108191215-35c7eff3a6b1 // indirect
 	google.golang.org/grpc v1.60.1 // indirect
 	google.golang.org/protobuf v1.32.0 // indirect