Merge pull request #214 from harmony-one/213

[#213] Export keystore to an output directory

cmd/subcommands/keys.go

@@ -292,16 +292,20 @@ func keysSub() []*cobra.Command {
 	cmdExportPK.Flags().StringVar(&passphraseFilePath, "passphrase-file", "", "path to a file containing the passphrase")
 
 	cmdExportKS := &cobra.Command{
-		Use:     "export-ks <ACCOUNT_ADDRESS>",
+		Use:     "export-ks <ACCOUNT_ADDRESS> <OUTPUT_DIRECTORY>",
 		Short:   "Export the keystore file contents",
-		Args:    cobra.ExactArgs(1),
+		Args:    cobra.ExactArgs(2),
 		PreRunE: validateAddress,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			passphrase, err := getPassphrase()
 			if err != nil {
 				return err
 			}
-			return account.ExportKeystore(addr.address, passphrase)
+			file, e := account.ExportKeystore(addr.address, args[1], passphrase)
+			if file != "" {
+				fmt.Println("Exported keystore to", file)
+			}
+			return e
 		},
 	}
 	cmdExportKS.Flags().BoolVar(&userProvidesPassphrase, "passphrase", false, ppPrompt)

pkg/account/export.go

@@ -2,7 +2,8 @@ package account
 
 import (
 	"fmt"
-	
+	"path/filepath"
+
 	"github.com/harmony-one/go-sdk/pkg/store"
 	"github.com/harmony-one/harmony/accounts"
 )
@@ -20,15 +21,23 @@ func ExportPrivateKey(address, passphrase string) error {
 	return nil
 }
 
-func ExportKeystore(address, passphrase string) error {
+func ExportKeystore(address, path, passphrase string) (string, error) {
 	ks := store.FromAddress(address)
 	allAccounts := ks.Accounts()
+	dirPath, err := filepath.Abs(path)
+	if err != nil {
+		return "", err
+	}
+	outFile := filepath.Join(dirPath, fmt.Sprintf("%s.key", address))
 	for _, account := range allAccounts {
 		keyFile, err := ks.Export(accounts.Account{Address: account.Address}, passphrase, passphrase)
 		if err != nil {
-			return err
+			return "", err
+		}
+		e := writeToFile(outFile, string(keyFile))
+		if e != nil {
+			return "", e
 		}
-		fmt.Printf("%s\n", keyFile)
 	}
-	return nil
+	return outFile, nil
 }

pkg/keys/keys.go

@@ -37,7 +37,6 @@ func ListKeys(keystoreDir string) {
 	for _, account := range allAccounts {
 		fmt.Printf("%s\t\t %s\n", address.ToBech32(account.Address), account.URL)
 	}
-
 }
 
 func AddNewKey(password string) {