diff --git a/programs/light_client/CMakeLists.txt b/programs/light_client/CMakeLists.txt
index 6a35f279..36608db3 100644
--- a/programs/light_client/CMakeLists.txt
+++ b/programs/light_client/CMakeLists.txt
@@ -18,7 +18,16 @@ if (NOT CMAKE_BUILD_TYPE STREQUAL "Debug")
     qt5_add_resources(QML_QRC qml/qml.qrc)
 endif()
 
-add_executable(light_client ChainDataModel.cpp Operations.cpp GrapheneApplication.cpp GrapheneObject.cpp Asset.cpp Account.cpp Balance.cpp main.cpp ${QML_QRC} ${QML})
+add_executable(light_client 
+        Wallet.cpp 
+        ChainDataModel.cpp 
+        Operations.cpp 
+        GrapheneApplication.cpp 
+        GrapheneObject.cpp 
+        Asset.cpp 
+        Account.cpp 
+        Balance.cpp 
+        main.cpp ${QML_QRC} ${QML})
 
 if (CMAKE_VERSION VERSION_LESS 3.0)
     add_dependencies(light_client gen_qrc)
diff --git a/programs/light_client/Wallet.cpp b/programs/light_client/Wallet.cpp
new file mode 100644
index 00000000..9fd4e43c
--- /dev/null
+++ b/programs/light_client/Wallet.cpp
@@ -0,0 +1,139 @@
+#include "Wallet.hpp"
+
+Wallet::Wallet()
+{
+}
+
+Wallet::~Wallet()
+{
+   close();
+}
+
+bool Wallet::open( QString file_path )
+{
+   return false;
+}
+
+bool Wallet::close()
+{
+   save();
+   return false;
+}
+
+bool Wallet::save()
+{
+   return false;
+}
+
+bool Wallet::saveAs( QString file_path )
+{
+   return false;
+}
+
+bool Wallet::create( QString file_path, QString brain_key )
+{
+   return false;
+}
+
+bool Wallet::loadBrainKey( QString brain_key )
+{
+   return false;
+}
+
+bool Wallet::purgeBrainKey()
+{
+   return false;
+}
+
+bool Wallet::hasBrainKey()const
+{
+   return false;
+}
+
+QString Wallet::getBrainKey()const
+{
+   return QString();
+}
+
+bool Wallet::isLocked()const
+{
+   return false;
+}
+QString Wallet::unlock( QString password )
+{
+   return QString();
+}
+
+bool Wallet::lock()
+{
+   return false;
+}
+bool  Wallet::changePassword( QString new_password )
+{
+   return false;
+}
+
+QString Wallet::getActivePrivateKey( QString owner_pub_key, uint32_t seq )
+{
+   return QString();
+}
+
+QString Wallet::getOwnerPrivateKey( uint32_t seq )
+{
+   return QString();
+}
+
+
+QString Wallet::getKeyLabel( QString pubkey )
+{
+   return QString();
+}
+
+QString Wallet::getPublicKey( QString label )
+{
+   return QString();
+}
+
+/** imports a public key and assigns it a label */
+bool    Wallet::importPublicKey( QString pubkey, QString label)
+{
+   return false;
+}
+
+/** 
+ * @param wifkey a private key in (WIF) Wallet Import Format
+ * @pre !isLocked() 
+ **/
+bool    Wallet::importPrivateKey( QString wifkey, QString label  )
+{
+   return false;
+}
+
+/** removes the key, its lablel and its private key */
+bool    Wallet::removePublicKey( QString pubkey )
+{
+   return false;
+}
+
+/** removes only the private key, keeping the public key and label */
+bool    Wallet::removePrivateKey( QString pubkey )
+{
+   return false;
+}
+
+/**
+ * @pre !isLocked()
+ */
+vector<signature_type>           Wallet::signDigest( const digest_type& d, 
+                                             const set<public_key_type>& keys )const
+{
+   vector<signature_type> result;
+   return result;
+}
+
+const flat_set<public_key_type>& Wallet::getAvailablePrivateKeys()const
+{
+   return _available_private_keys;
+}
+
+
diff --git a/programs/light_client/Wallet.hpp b/programs/light_client/Wallet.hpp
new file mode 100644
index 00000000..3c229365
--- /dev/null
+++ b/programs/light_client/Wallet.hpp
@@ -0,0 +1,121 @@
+#pragma once
+#pragma GCC diagnostic ignored "-Wunknown-pragmas"
+
+#include <graphene/chain/protocol/types.hpp>
+#include <QObject>
+
+using std::string;
+using std::vector;
+using std::set;
+using fc::flat_set;
+using std::map;
+using graphene::chain::public_key_type;
+using graphene::chain::digest_type;
+using graphene::chain::signature_type;
+using fc::optional;
+
+struct key_data
+{
+   string       label; /** unique label assigned to this key */
+   vector<char> encrypted_private_key;
+};
+FC_REFLECT( key_data, (label)(encrypted_private_key) );
+
+struct wallet_file
+{
+   optional<vector<char>>          encrypted_brain_key;
+   optional<vector<char>>          encrypted_master_key;
+   map<public_key_type, key_data>  encrypted_private_keys;
+};
+
+FC_REFLECT( wallet_file, 
+            (encrypted_brain_key)
+            (encrypted_master_key)
+            (encrypted_private_keys) 
+          );
+
+
+/**
+ *  @class Wallet
+ *  @brief Securely maintains a set of labeled public and private keys
+ */
+class Wallet : public QObject
+{
+   public:
+      Q_OBJECT
+
+      Wallet();
+      ~Wallet();
+
+      Q_INVOKABLE bool open( QString file_path );
+      Q_INVOKABLE bool close();
+      Q_INVOKABLE bool save();
+      Q_INVOKABLE bool saveAs( QString file_path );
+      Q_INVOKABLE bool create( QString file_path, QString brain_key = QString() );
+
+      /** required to generate new owner keys */
+      Q_INVOKABLE bool loadBrainKey( QString brain_key );
+
+      /** removes brain key to secure owner keys */
+      Q_INVOKABLE bool purgeBrainKey();
+      Q_INVOKABLE bool hasBrainKey()const;
+
+      /** @pre hasBrainKey() */
+      Q_INVOKABLE QString getBrainKey()const;
+
+      Q_INVOKABLE bool    isLocked()const;
+      Q_INVOKABLE QString unlock( QString password );
+      Q_INVOKABLE bool    lock();
+      Q_INVOKABLE bool    changePassword( QString new_password );
+
+      /**
+       * @pre !isLocked();
+       * @post save()
+       * @return WIF private key 
+       */
+      Q_INVOKABLE QString getActivePrivateKey( QString owner_public_key, uint32_t sequence );
+
+      /**
+       * @pre !isLocked();
+       * @pre hasBrainKey();
+       * @post save()
+       * @return WIF private key 
+       */
+      Q_INVOKABLE QString getOwnerPrivateKey( uint32_t sequence );
+
+      Q_INVOKABLE QString getKeyLabel( QString pubkey );
+      Q_INVOKABLE QString getPublicKey( QString label );
+
+      /** imports a public key and assigns it a label */
+      Q_INVOKABLE bool    importPublicKey( QString pubkey, QString label = QString() );
+
+      /** 
+       * @param wifkey a private key in (WIF) Wallet Import Format
+       * @pre !isLocked() 
+       **/
+      Q_INVOKABLE bool    importPrivateKey( QString wifkey, QString label = QString() );
+
+      /** removes the key, its lablel and its private key */
+      Q_INVOKABLE bool    removePublicKey( QString pubkey );
+
+      /** removes only the private key, keeping the public key and label */
+      Q_INVOKABLE bool    removePrivateKey( QString pubkey );
+
+
+      /**
+       * @pre !isLocked()
+       */
+      vector<signature_type>           signDigest( const digest_type& d, 
+                                                   const set<public_key_type>& keys )const;
+
+      const flat_set<public_key_type>& getAvailablePrivateKeys()const;
+
+   private:
+      fc::path                  _wallet_file_path;
+      wallet_file               _data;
+      fc::sha512                _decrypted_master_key;
+      flat_set<public_key_type> _available_private_keys;
+      map<QString,QString>      _label_to_key;
+};
+
+