Wallet API: add support for wallet creation from hardware device

src/common/util.cpp

@@ -827,4 +827,22 @@ std::string get_nix_version_display_string()
       return false;
     return true;
   }
+
+  boost::optional<std::pair<uint32_t, uint32_t>> parse_subaddress_lookahead(const std::string& str)
+  {
+    auto pos = str.find(":");
+    bool r = pos != std::string::npos;
+    uint32_t major;
+    r = r && epee::string_tools::get_xtype_from_string(major, str.substr(0, pos));
+    uint32_t minor;
+    r = r && epee::string_tools::get_xtype_from_string(minor, str.substr(pos + 1));
+    if (r)
+    {
+      return std::make_pair(major, minor);
+    }
+    else
+    {
+      return {};
+    }
+  }
 }

src/common/util.h

@@ -32,6 +32,7 @@
 
 #include <boost/thread/locks.hpp>
 #include <boost/thread/mutex.hpp>
+#include <boost/optional.hpp>
 #include <system_error>
 #include <csignal>
 #include <cstdio>
@@ -214,4 +215,6 @@ namespace tools
   bool sha256sum(const std::string &filename, crypto::hash &hash);
 
   bool is_hdd(const char *path);
+
+  boost::optional<std::pair<uint32_t, uint32_t>> parse_subaddress_lookahead(const std::string& str);
 }

src/simplewallet/simplewallet.cpp

@@ -379,21 +379,10 @@ namespace
 
   boost::optional<std::pair<uint32_t, uint32_t>> parse_subaddress_lookahead(const std::string& str)
   {
-    auto pos = str.find(":");
-    bool r = pos != std::string::npos;
-    uint32_t major;
-    r = r && epee::string_tools::get_xtype_from_string(major, str.substr(0, pos));
-    uint32_t minor;
-    r = r && epee::string_tools::get_xtype_from_string(minor, str.substr(pos + 1));
-    if (r)
-    {
-      return std::make_pair(major, minor);
-    }
-    else
-    {
+    auto r = tools::parse_subaddress_lookahead(str);
+    if (!r)
       fail_msg_writer() << tr("invalid format for subaddress lookahead; must be <major>:<minor>");
-      return {};
-    }
+    return r;
   }
 
   void handle_transfer_exception(const std::exception_ptr &e, bool trusted_daemon)

src/wallet/api/wallet.cpp

@@ -372,6 +372,7 @@ WalletImpl::WalletImpl(NetworkType nettype)
     , m_trustedDaemon(false)
     , m_wallet2Callback(nullptr)
     , m_recoveringFromSeed(false)
+    , m_recoveringFromDevice(false)
     , m_synchronized(false)
     , m_rebuildWalletCache(false)
     , m_is_connected(false)
@@ -419,6 +420,7 @@ bool WalletImpl::create(const std::string &path, const std::string &password, co
 
     clearStatus();
     m_recoveringFromSeed = false;
+    m_recoveringFromDevice = false;
     bool keys_file_exists;
     bool wallet_file_exists;
     tools::wallet2::wallet_exists(path, keys_file_exists, wallet_file_exists);
@@ -621,11 +623,28 @@ bool WalletImpl::recoverFromKeysWithPassword(const std::string &path,
     return true;
 }
 
+bool WalletImpl::recoverFromDevice(const std::string &path, const std::string &password, const std::string &device_name)
+{
+    clearStatus();
+    m_recoveringFromSeed = false;
+    m_recoveringFromDevice = true;
+    try
+    {
+        m_wallet->restore(path, password, device_name);
+        LOG_PRINT_L1("Generated new wallet from device: " + device_name);
+    }
+    catch (const std::exception& e) {
+        setStatusError(string(tr("failed to generate new wallet: ")) + e.what());
+        return false;
+    }
+    return true;
+}
 
 bool WalletImpl::open(const std::string &path, const std::string &password)
 {
     clearStatus();
     m_recoveringFromSeed = false;
+    m_recoveringFromDevice = false;
     try {
         // TODO: handle "deprecated"
         // Check if wallet cache exists
@@ -663,6 +682,7 @@ bool WalletImpl::recover(const std::string &path, const std::string &password, c
     }
 
     m_recoveringFromSeed = true;
+    m_recoveringFromDevice = false;
     crypto::secret_key recovery_key;
     std::string old_language;
     if (!crypto::ElectrumWords::words_to_bytes(seed, recovery_key, old_language)) {
@@ -884,6 +904,16 @@ void WalletImpl::setRecoveringFromSeed(bool recoveringFromSeed)
     m_recoveringFromSeed = recoveringFromSeed;
 }
 
+void WalletImpl::setRecoveringFromDevice(bool recoveringFromDevice)
+{
+    m_recoveringFromDevice = recoveringFromDevice;
+}
+
+void WalletImpl::setSubaddressLookahead(uint32_t major, uint32_t minor)
+{
+    m_wallet->set_subaddress_lookahead(major, minor);
+}
+
 uint64_t WalletImpl::balance(uint32_t accountIndex) const
 {
     return m_wallet->balance(accountIndex);
@@ -1996,7 +2026,7 @@ bool WalletImpl::isNewWallet() const
     // with the daemon (pull hashes instead of pull blocks).
     // If wallet cache is rebuilt, creation height stored in .keys is used.
     // Watch only wallet is a copy of an existing wallet. 
-    return !(blockChainHeight() > 1 || m_recoveringFromSeed || m_rebuildWalletCache) && !watchOnly();
+    return !(blockChainHeight() > 1 || m_recoveringFromSeed || m_recoveringFromDevice || m_rebuildWalletCache) && !watchOnly();
 }
 
 bool WalletImpl::doInit(const string &daemon_address, uint64_t upper_transaction_size_limit, bool ssl)

src/wallet/api/wallet.h

@@ -76,6 +76,9 @@ class WalletImpl : public Wallet
                             const std::string &address_string, 
                             const std::string &viewkey_string,
                             const std::string &spendkey_string = "");
+    bool recoverFromDevice(const std::string &path,
+                           const std::string &password,
+                           const std::string &device_name);
     bool close(bool store = true);
     std::string seed() const;
     std::string getSeedLanguage() const;
@@ -115,6 +118,8 @@ class WalletImpl : public Wallet
     void setRefreshFromBlockHeight(uint64_t refresh_from_block_height);
     uint64_t getRefreshFromBlockHeight() const { return m_wallet->get_refresh_from_block_height(); };
     void setRecoveringFromSeed(bool recoveringFromSeed);
+    void setRecoveringFromDevice(bool recoveringFromDevice) override;
+    void setSubaddressLookahead(uint32_t major, uint32_t minor) override;
     bool watchOnly() const;
     bool rescanSpent();
     NetworkType nettype() const {return static_cast<NetworkType>(m_wallet->nettype());}
@@ -232,6 +237,7 @@ class WalletImpl : public Wallet
     // so it shouldn't be considered as new and pull blocks (slow-refresh)
     // instead of pulling hashes (fast-refresh)
     std::atomic<bool>   m_recoveringFromSeed;
+    std::atomic<bool>   m_recoveringFromDevice;
     std::atomic<bool>   m_synchronized;
     std::atomic<bool>   m_rebuildWalletCache;
     // cache connection status to avoid unnecessary RPC calls

src/wallet/api/wallet2_api.h

@@ -509,6 +509,21 @@ struct Wallet
     */
     virtual void setRecoveringFromSeed(bool recoveringFromSeed) = 0;
 
+   /*!
+    * \brief setRecoveringFromDevice - set state to recovering from device
+    *
+    * \param recoveringFromDevice - true/false
+    */
+    virtual void setRecoveringFromDevice(bool recoveringFromDevice) = 0;
+
+    /*!
+     * \brief setSubaddressLookahead - set size of subaddress lookahead
+     *
+     * \param major - size fot the major index
+     * \param minor - size fot the minor index
+     */
+    virtual void setSubaddressLookahead(uint32_t major, uint32_t minor) = 0;
+
     /**
      * @brief connectToDaemon - connects to the daemon. TODO: check if it can be removed
      * @return
@@ -1014,6 +1029,23 @@ struct WalletManager
         return createWalletFromKeys(path, language, testnet ? TESTNET : MAINNET, restoreHeight, addressString, viewKeyString, spendKeyString);
     }
 
+    /*!
+     * \brief  creates wallet using hardware device.
+     * \param  path                 Name of wallet file to be created
+     * \param  password             Password of wallet file
+     * \param  nettype              Network type
+     * \param  deviceName           Device name
+     * \param  restoreHeight        restore from start height (0 sets to current height)
+     * \param  subaddressLookahead  Size of subaddress lookahead (empty sets to some default low value)
+     * \return                      Wallet instance (Wallet::status() needs to be called to check if recovered successfully)
+     */
+    virtual Wallet * createWalletFromDevice(const std::string &path,
+                                            const std::string &password,
+                                            NetworkType nettype,
+                                            const std::string &deviceName,
+                                            uint64_t restoreHeight = 0,
+                                            const std::string &subaddressLookahead = "") = 0;
+
     /*!
      * \brief Closes wallet. In case operation succeeded, wallet object deleted. in case operation failed, wallet object not deleted
      * \param wallet        previously opened / created wallet instance

src/wallet/api/wallet_manager.cpp

@@ -114,6 +114,26 @@ Wallet *WalletManagerImpl::createWalletFromKeys(const std::string &path,
     return wallet;
 }
 
+Wallet *WalletManagerImpl::createWalletFromDevice(const std::string &path,
+                                                  const std::string &password,
+                                                  NetworkType nettype,
+                                                  const std::string &deviceName,
+                                                  uint64_t restoreHeight,
+                                                  const std::string &subaddressLookahead)
+{
+    WalletImpl * wallet = new WalletImpl(nettype);
+    if(restoreHeight > 0){
+        wallet->setRefreshFromBlockHeight(restoreHeight);
+    }
+    auto lookahead = tools::parse_subaddress_lookahead(subaddressLookahead);
+    if (lookahead)
+    {
+        wallet->setSubaddressLookahead(lookahead->first, lookahead->second);
+    }
+    wallet->recoverFromDevice(path, password, deviceName);
+    return wallet;
+}
+
 bool WalletManagerImpl::closeWallet(Wallet *wallet, bool store)
 {
     WalletImpl * wallet_ = dynamic_cast<WalletImpl*>(wallet);

src/wallet/api/wallet_manager.h

@@ -64,6 +64,12 @@ class WalletManagerImpl : public WalletManager
                                                     const std::string &addressString,
                                                     const std::string &viewKeyString,
                                                     const std::string &spendKeyString = "");
+    virtual Wallet * createWalletFromDevice(const std::string &path,
+                                            const std::string &password,
+                                            NetworkType nettype,
+                                            const std::string &deviceName,
+                                            uint64_t restoreHeight = 0,
+                                            const std::string &subaddressLookahead = "") override;
     virtual bool closeWallet(Wallet *wallet, bool store = true);
     bool walletExists(const std::string &path);
     bool verifyWalletPassword(const std::string &keys_file_name, const std::string &password, bool no_spend_key) const;

src/wallet/wallet2.cpp

@@ -3273,6 +3273,12 @@ void wallet2::restore(const std::string& wallet_, const epee::wipeable_string& p
   cryptonote::block b;
   generate_genesis(b);
   m_blockchain.push_back(get_block_hash(b));
+  if (m_subaddress_lookahead_major == SUBADDRESS_LOOKAHEAD_MAJOR && m_subaddress_lookahead_minor == SUBADDRESS_LOOKAHEAD_MINOR)
+  {
+    // the default lookahead setting (50:200) is clearly too much for hardware wallet
+    m_subaddress_lookahead_major = 5;
+    m_subaddress_lookahead_minor = 20;
+  }
   add_subaddress_account(tr("Primary account"));
   if (!wallet_.empty()) {
     store();