laconicd/client/export.go

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package client
import (
"bufio"
"fmt"
"strings"
"github.com/spf13/cobra"
"github.com/spf13/viper"
"github.com/ethereum/go-ethereum/common/hexutil"
ethcrypto "github.com/ethereum/go-ethereum/crypto"
"github.com/cosmos/cosmos-sdk/client/flags"
"github.com/cosmos/cosmos-sdk/client/input"
"github.com/cosmos/cosmos-sdk/crypto/keys"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/cosmos/ethermint/crypto"
)
// UnsafeExportEthKeyCommand exports a key with the given name as a private key in hex format.
func UnsafeExportEthKeyCommand() *cobra.Command {
return &cobra.Command{
Use: "unsafe-export-eth-key [name]",
Short: "**UNSAFE** Export an Ethereum private key",
Long: `**UNSAFE** Export an Ethereum private key unencrypted to use in dev tooling`,
Args: cobra.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
inBuf := bufio.NewReader(cmd.InOrStdin())
kb, err := keys.NewKeyring(
sdk.KeyringServiceName(),
viper.GetString(flags.FlagKeyringBackend),
viper.GetString(flags.FlagHome),
inBuf,
crypto.EthSecp256k1Options()...,
)
if err != nil {
return err
}
decryptPassword := ""
conf := true
keyringBackend := viper.GetString(flags.FlagKeyringBackend)
switch keyringBackend {
case keys.BackendFile:
decryptPassword, err = input.GetPassword(
"**WARNING this is an unsafe way to export your unencrypted private key**\nEnter key password:",
inBuf)
case keys.BackendOS:
conf, err = input.GetConfirmation(
"**WARNING** this is an unsafe way to export your unencrypted private key, are you sure?",
inBuf)
}
if err != nil || !conf {
return err
}
// Exports private key from keybase using password
privKey, err := kb.ExportPrivateKeyObject(args[0], decryptPassword)
if err != nil {
return err
}
// Converts key to Ethermint secp256 implementation
emintKey, ok := privKey.(crypto.PrivKeySecp256k1)
if !ok {
return fmt.Errorf("invalid private key type, must be Ethereum key: %T", privKey)
}
// Formats key for output
privB := ethcrypto.FromECDSA(emintKey.ToECDSA())
keyS := strings.ToUpper(hexutil.Encode(privB)[2:])
fmt.Println(keyS)
return nil
},
}
}