feat(client/keys): add support for importing hex key using standard input

CHANGELOG.md

@@ -40,6 +40,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Features
 
+* (client/keys) [#24071](https://github.com/cosmos/cosmos-sdk/pull/24071) Add support for importing hex key using standard input.
 * (perf)[#24045](https://github.com/cosmos/cosmos-sdk/pull/24045) Sims: Replace runsim command with Go stdlib testing. CLI: `Commit` default true, `Lean`, `SimulateEveryOperation`, `PrintAllInvariants`, `DBBackend` params removed
 * (crypto/keyring) [#24040](https://github.com/cosmos/cosmos-sdk/pull/24040) Expose the db keyring used in the keystore.
 * (types) [#23919](https://github.com/cosmos/cosmos-sdk/pull/23919) Add MustValAddressFromBech32 function.

client/keys/import.go

@@ -2,8 +2,10 @@ package keys
 
 import (
 	"bufio"
+	"errors"
 	"fmt"
 	"os"
+	"strings"
 
 	"github.com/spf13/cobra"
 
@@ -26,9 +28,13 @@ func ImportKeyCommand() *cobra.Command {
 			if err != nil {
 				return err
 			}
+			name := args[0]
+			if strings.TrimSpace(name) == "" {
+				return errors.New("the provided name is invalid or empty after trimming whitespace")
+			}
 			buf := bufio.NewReader(clientCtx.Input)
 
-			bz, err := os.ReadFile(args[1])
+			armor, err := os.ReadFile(args[1])
 			if err != nil {
 				return err
 			}
@@ -38,24 +44,39 @@ func ImportKeyCommand() *cobra.Command {
 				return err
 			}
 
-			return clientCtx.Keyring.ImportPrivKey(args[0], string(bz), passphrase)
+			return clientCtx.Keyring.ImportPrivKey(name, string(armor), passphrase)
 		},
 	}
 }
 
 func ImportKeyHexCommand() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "import-hex <name> <hex>",
+		Use:   "import-hex <name> [hex]",
 		Short: "Import private keys into the local keybase",
 		Long:  fmt.Sprintf("Import hex encoded private key into the local keybase.\nSupported key-types can be obtained with:\n%s list-key-types", version.AppName),
-		Args:  cobra.ExactArgs(2),
+		Args:  cobra.RangeArgs(1, 2),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			clientCtx, err := client.GetClientQueryContext(cmd)
 			if err != nil {
 				return err
 			}
+			name := args[0]
+			if strings.TrimSpace(name) == "" {
+				return errors.New("the provided name is invalid or empty after trimming whitespace")
+			}
+
 			keyType, _ := cmd.Flags().GetString(flags.FlagKeyType)
-			return clientCtx.Keyring.ImportPrivKeyHex(args[0], args[1], keyType)
+			var hexKey string
+			if len(args) == 2 {
+				hexKey = args[1]
+			} else {
+				buf := bufio.NewReader(clientCtx.Input)
+				hexKey, err = input.GetPassword("Enter hex private key:", buf)
+				if err != nil {
+					return err
+				}
+			}
+			return clientCtx.Keyring.ImportPrivKeyHex(name, hexKey, keyType)
 		},
 	}
 	cmd.Flags().String(flags.FlagKeyType, string(hd.Secp256k1Type), "private key signing algorithm kind")

client/keys/import_test.go

@@ -82,10 +82,10 @@ HbP+c6JmeJy9JXe2rbbF1QtCX1gLqGcDQPBXiCtFvP7/8wTZtVOPj8vREzhZ9ElO
 			// Now add a temporary keybase
 			kbHome := filepath.Join(t.TempDir(), fmt.Sprintf("kbhome-%s", tc.name))
 			// Create dir, otherwise os.WriteFile will fail
-			if _, err := os.Stat(kbHome); os.IsNotExist(err) {
-				err = os.MkdirAll(kbHome, 0o700)
-				require.NoError(t, err)
-			}
+			require.NoError(t, os.MkdirAll(kbHome, 0o700))
+			t.Cleanup(func() {
+				require.NoError(t, os.RemoveAll(kbHome))
+			})
 			kb, err := keyring.New(sdk.KeyringServiceName(), tc.keyringBackend, kbHome, nil, cdc)
 			require.NoError(t, err)
 
@@ -127,6 +127,7 @@ func Test_runImportHexCmd(t *testing.T) {
 		name           string
 		keyringBackend string
 		hexKey         string
+		stdInput       bool
 		keyType        string
 		expectError    bool
 	}{
@@ -136,6 +137,13 @@ func Test_runImportHexCmd(t *testing.T) {
 			hexKey:         "0xa3e57952e835ed30eea86a2993ac2a61c03e74f2085b3635bd94aa4d7ae0cfdf",
 			keyType:        "secp256k1",
 		},
+		{
+			name:           "read the hex key from standard input",
+			keyringBackend: keyring.BackendTest,
+			stdInput:       true,
+			hexKey:         "0xa3e57952e835ed30eea86a2993ac2a61c03e74f2085b3635bd94aa4d7ae0cfdf",
+			keyType:        "secp256k1",
+		},
 	}
 
 	for _, tc := range testCases {
@@ -146,6 +154,10 @@ func Test_runImportHexCmd(t *testing.T) {
 
 			// Now add a temporary keybase
 			kbHome := filepath.Join(t.TempDir(), fmt.Sprintf("kbhome-%s", tc.name))
+			t.Cleanup(func() {
+				require.NoError(t, os.RemoveAll(kbHome))
+			})
+
 			kb, err := keyring.New(sdk.KeyringServiceName(), tc.keyringBackend, kbHome, nil, cdc)
 			require.NoError(t, err)
 
@@ -156,17 +168,17 @@ func Test_runImportHexCmd(t *testing.T) {
 				WithCodec(cdc)
 			ctx := context.WithValue(context.Background(), client.ClientContextKey, &clientCtx)
 
-			t.Cleanup(cleanupKeys(t, kb, "keyname1"))
-
-			defer func() {
-				_ = os.RemoveAll(kbHome)
-			}()
-
-			cmd.SetArgs([]string{
-				"keyname1", tc.hexKey,
+			args := []string{"keyname1"}
+			if tc.stdInput {
+				mockIn.Reset(tc.hexKey)
+			} else {
+				args = append(args, tc.hexKey)
+			}
+			cmd.SetArgs(append(
+				args,
 				fmt.Sprintf("--%s=%s", flags.FlagKeyType, tc.keyType),
 				fmt.Sprintf("--%s=%s", flags.FlagKeyringBackend, tc.keyringBackend),
-			})
+			))
 
 			err = cmd.ExecuteContext(ctx)
 			if tc.expectError {