diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index d9d24b4f0..6170000b7 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -47,6 +47,47 @@ namespace {
     static const size_t DEFAULT_MIX = 4;
 }
 
+struct Wallet2CallbackImpl : public tools::i_wallet2_callback
+{
+
+    ~Wallet2CallbackImpl()
+    {
+
+    }
+
+    void setListener(WalletListener * listener)
+    {
+        // TODO;
+    }
+
+    WalletListener * getListener() const
+    {
+        return m_listener;
+    }
+
+    virtual void on_new_block(uint64_t height, const cryptonote::block& block)
+    {
+        // TODO;
+    }
+    virtual void on_money_received(uint64_t height, const cryptonote::transaction& tx, size_t out_index)
+    {
+        // TODO;
+
+    }
+    virtual void on_money_spent(uint64_t height, const cryptonote::transaction& in_tx, size_t out_index,
+                                const cryptonote::transaction& spend_tx)
+    {
+        // TODO;
+    }
+
+    virtual void on_skip_transaction(uint64_t height, const cryptonote::transaction& tx)
+    {
+        // TODO;
+    }
+
+    WalletListener * m_listener;
+};
+
 Wallet::~Wallet() {}
 
 string Wallet::displayAmount(uint64_t amount)
@@ -56,14 +97,17 @@ string Wallet::displayAmount(uint64_t amount)
 
 ///////////////////////// WalletImpl implementation ////////////////////////
 WalletImpl::WalletImpl(bool testnet)
-    :m_wallet(nullptr), m_status(Wallet::Status_Ok), m_trustedDaemon(false)
+    :m_wallet(nullptr), m_status(Wallet::Status_Ok), m_trustedDaemon(false),
+      m_wallet2Callback(nullptr)
 {
     m_wallet = new tools::wallet2(testnet);
     m_history = new TransactionHistoryImpl(this);
+    m_wallet2Callback = new Wallet2CallbackImpl;
 }
 
 WalletImpl::~WalletImpl()
 {
+    delete m_wallet2Callback;
     delete m_history;
     delete m_wallet;
 }
@@ -399,6 +443,14 @@ TransactionHistory *WalletImpl::history() const
     return m_history;
 }
 
+void WalletImpl::setListener(WalletListener *l)
+{
+    // TODO thread synchronization;
+    m_wallet2Callback->setListener(l);
+}
+
+
+
 bool WalletImpl::connectToDaemon()
 {
     bool result = m_wallet->check_connection();
diff --git a/src/wallet/api/wallet.h b/src/wallet/api/wallet.h
index 3671c2f7a..c0fa31003 100644
--- a/src/wallet/api/wallet.h
+++ b/src/wallet/api/wallet.h
@@ -40,6 +40,7 @@
 namespace Bitmonero {
 class TransactionHistoryImpl;
 class PendingTransactionImpl;
+struct Wallet2CallbackImpl;
 
 class WalletImpl : public Wallet
 {
@@ -70,6 +71,7 @@ public:
     PendingTransaction * createTransaction(const std::string &dst_addr, uint64_t amount);
     virtual void disposeTransaction(PendingTransaction * t);
     virtual TransactionHistory * history() const;
+    virtual void setListener(WalletListener * l);
 
 private:
     void clearStatus();
@@ -84,6 +86,8 @@ private:
     std::string m_password;
     TransactionHistoryImpl * m_history;
     bool        m_trustedDaemon;
+    WalletListener * m_walletListener;
+    Wallet2CallbackImpl * m_wallet2Callback;
 };
 
 
diff --git a/src/wallet/wallet2_api.h b/src/wallet/wallet2_api.h
index 43f5c9472..8e0830746 100644
--- a/src/wallet/wallet2_api.h
+++ b/src/wallet/wallet2_api.h
@@ -103,6 +103,13 @@ struct TransactionHistory
 };
 
 
+struct WalletListener
+{
+    virtual ~WalletListener() = 0;
+    virtual void moneySpent(const std::string &txId, uint64_t amount);
+    virtual void moneyReceived(const std::string &txId, uint64_t amount);
+};
+
 
 /**
  * @brief Interface for wallet operations.
@@ -141,6 +148,7 @@ struct Wallet
     virtual PendingTransaction * createTransaction(const std::string &dst_addr, uint64_t amount) = 0;
     virtual void disposeTransaction(PendingTransaction * t) = 0;
     virtual TransactionHistory * history() const = 0;
+    virtual void setListener(WalletListener *) = 0;
 };
 
 /**