Problem: need to add JSON-RPC endpoint personal_initializeWallet

* Closes evmos#738

* will simply return error since smartcard wallet is not supported yet.

rpc/ethereum/namespaces/personal/api.go

@@ -230,3 +230,11 @@ func (api *PrivateAccountAPI) Unpair(_ context.Context, url, pin string) error {
 	// TODO: Smartcard wallet not supported yet, refer to: https://github.com/ethereum/go-ethereum/blob/master/accounts/scwallet/README.md
 	return fmt.Errorf("smartcard wallet not supported yet")
 }
+
+// InitializeWallet initializes a new wallet at the provided URL, by generating and returning a new private key.
+func (api *PrivateAccountAPI) InitializeWallet(_ context.Context, url string) (string, error) {
+	api.logger.Debug("personal_initializeWallet", "url", url)
+	api.logger.Info("personal_initializeWallet for smartcard wallet not supported")
+	// TODO: Smartcard wallet not supported yet, refer to: https://github.com/ethereum/go-ethereum/blob/master/accounts/scwallet/README.md
+	return "", fmt.Errorf("smartcard wallet not supported yet")
+}

tests/rpc/personal_test.go

@@ -148,9 +148,13 @@ func TestPersonal_LockAccount(t *testing.T) {
 func TestPersonal_Unpair(t *testing.T) {
 	t.Skip("skipping TestPersonal_Unpair")
 
-	rpcRes := Call(t, "personal_unpair", []interface{}{"", 0})
+	_, err := CallWithError(t, "personal_unpair", []interface{}{"", 0})
+	require.True(t, errors.Is(err, fmt.Errorf("smartcard wallet not supported yet")))
+}
 
-	var res error
-	err := json.Unmarshal(rpcRes.Result, &res)
+func TestPersonal_InitializeWallet(t *testing.T) {
+	t.Skip("skipping TestPersonal_InitializeWallet")
+
+	_, err := CallWithError(t, "personal_initializeWallet", []interface{}{""})
 	require.True(t, errors.Is(err, fmt.Errorf("smartcard wallet not supported yet")))
 }