device/trezor: HF10 support added, wallet::API

- import only key images generated by cold signing process
- wallet_api: trezor methods added
- wallet: button request code added
- const added to methods
- wallet2::get_tx_key_device() tries to decrypt stored tx private keys using the device.
- simplewallet supports get_tx_key and get_tx_proof on hw device using the get_tx_key feature
- live refresh enables refresh with trezor i.e. computing key images on the fly. More convenient and efficient for users.
- device: has_ki_live_refresh added
- a thread is watching whether live refresh is being computed, if not for 30 seconds, it terminates the live refresh process - switches Trezor state

src/wallet/api/wallet2_api.h

@@ -324,6 +324,19 @@ struct MultisigState {
     uint32_t total;
 };
 
+
+struct DeviceProgress {
+    DeviceProgress(): m_progress(0), m_indeterminate(false) {}
+    DeviceProgress(double progress, bool indeterminate=false): m_progress(progress), m_indeterminate(indeterminate) {}
+
+    virtual double progress() const { return m_progress; }
+    virtual bool indeterminate() const { return m_indeterminate; }
+
+protected:
+    double m_progress;
+    bool m_indeterminate;
+};
+
 struct WalletListener
 {
     virtual ~WalletListener() = 0;
@@ -364,6 +377,31 @@ struct WalletListener
      * @brief refreshed - called when wallet refreshed by background thread or explicitly refreshed by calling "refresh" synchronously
      */
     virtual void refreshed() = 0;
+
+    /**
+     * @brief called by device if the action is required
+     */
+    virtual void onDeviceButtonRequest(uint64_t code) {}
+
+    /**
+     * @brief called by device when PIN is needed
+     */
+    virtual optional<std::string> onDevicePinRequest() {
+        throw std::runtime_error("Not supported");
+    }
+
+    /**
+     * @brief called by device when passphrase entry is needed
+     */
+    virtual optional<std::string> onDevicePassphraseRequest(bool on_device) {
+        if (!on_device) throw std::runtime_error("Not supported");
+        return optional<std::string>();
+    }
+
+    /**
+     * @brief Signalizes device operation progress
+     */
+    virtual void onDeviceProgress(const DeviceProgress & event) {};
 };
 
 
@@ -375,7 +413,8 @@ struct Wallet
 {
     enum Device {
         Device_Software = 0,
-        Device_Ledger = 1
+        Device_Ledger = 1,
+        Device_Trezor = 2
     };
 
     enum Status {
@@ -401,6 +440,8 @@ struct Wallet
     //! returns both error and error string atomically. suggested to use in instead of status() and errorString()
     virtual void statusWithErrorString(int& status, std::string& errorString) const = 0;
     virtual bool setPassword(const std::string &password) = 0;
+    virtual bool setDevicePin(const std::string &password) { return false; };
+    virtual bool setDevicePassphrase(const std::string &password) { return false; };
     virtual std::string address(uint32_t accountIndex = 0, uint32_t addressIndex = 0) const = 0;
     std::string mainAddress() const { return address(0, 0); }
     virtual std::string path() const = 0;
@@ -947,6 +988,9 @@ struct Wallet
      * \return Device they are on
      */
     virtual Device getDeviceType() const = 0;
+
+    //! cold-device protocol key image sync
+    virtual uint64_t coldKeyImageSync(uint64_t &spent, uint64_t &unspent) = 0;
 };
 
 /**