wallet-rpc: add on_restore_deterministic RPC call.

1 files changed, 194 insertions, 0 deletions

diff --git a/src/wallet/wallet_rpc_server.cpp b/src/wallet/wallet_rpc_server.cpp
index 6dbea2e14..9c94093a4 100644
--- a/src/wallet/wallet_rpc_server.cpp
+++ b/src/wallet/wallet_rpc_server.cpp
@@ -3089,6 +3089,200 @@ namespace tools
     }
   }
   //------------------------------------------------------------------------------------------------------------------------------
+  bool wallet_rpc_server::on_restore_deterministic_wallet(const wallet_rpc::COMMAND_RPC_RESTORE_DETERMINISTIC_WALLET::request &req, wallet_rpc::COMMAND_RPC_RESTORE_DETERMINISTIC_WALLET::response &res, epee::json_rpc::error &er)
+  {
+    if (m_wallet_dir.empty())
+    {
+      er.code = WALLET_RPC_ERROR_CODE_NO_WALLET_DIR;
+      er.message = "No wallet dir configured";
+      return false;
+    }
+
+    // early check for mandatory fields
+    if (req.filename.empty())
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "field 'filename' is mandatory. Please provide a filename to save the restored wallet to.";
+      return false;
+    }
+    if (req.seed.empty())
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "field 'seed' is mandatory. Please provide a seed you want to restore from.";
+      return false;
+    }
+
+    namespace po = boost::program_options;
+    po::variables_map vm2;
+    const char *ptr = strchr(req.filename.c_str(), '/');
+  #ifdef _WIN32
+    if (!ptr)
+      ptr = strchr(req.filename.c_str(), '\\');
+    if (!ptr)
+      ptr = strchr(req.filename.c_str(), ':');
+  #endif
+    if (ptr)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "Invalid filename";
+      return false;
+    }
+    std::string wallet_file = m_wallet_dir + "/" + req.filename;
+    // check if wallet file already exists
+    if (!wallet_file.empty())
+    {
+      try
+      {
+        boost::system::error_code ignored_ec;
+        THROW_WALLET_EXCEPTION_IF(boost::filesystem::exists(wallet_file, ignored_ec), error::file_exists, wallet_file);
+      }
+      catch (const std::exception &e)
+      {
+        er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+        er.message = "Wallet already exists.";
+        return false;
+      }
+    }
+    crypto::secret_key recovery_key;
+    std::string old_language;
+
+    // check the given seed
+    {
+      if (!crypto::ElectrumWords::words_to_bytes(req.seed, recovery_key, old_language))
+      {
+        er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+        er.message = "Electrum-style word list failed verification";
+        return false;
+      }
+    }
+
+    // process seed_offset if given
+    {
+      if (!req.seed_offset.empty())
+      {
+        recovery_key = cryptonote::decrypt_key(recovery_key, req.seed_offset);
+      }
+    }
+    {
+      po::options_description desc("dummy");
+      const command_line::arg_descriptor<std::string, true> arg_password = {"password", "password"};
+      const char *argv[4];
+      int argc = 3;
+      argv[0] = "wallet-rpc";
+      argv[1] = "--password";
+      argv[2] = req.password.c_str();
+      argv[3] = NULL;
+      vm2 = *m_vm;
+      command_line::add_arg(desc, arg_password);
+      po::store(po::parse_command_line(argc, argv, desc), vm2);
+    }
+
+    auto rc = tools::wallet2::make_new(vm2, true, nullptr);
+    std::unique_ptr<wallet2> wal;
+    wal = std::move(rc.first);
+    if (!wal)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "Failed to create wallet";
+      return false;
+    }
+
+    epee::wipeable_string password = rc.second.password();
+
+    bool was_deprecated_wallet = ((old_language == crypto::ElectrumWords::old_language_name) ||
+                                  crypto::ElectrumWords::get_is_old_style_seed(req.seed));
+
+    std::string mnemonic_language = old_language;
+    if (was_deprecated_wallet)
+    {
+      // The user had used an older version of the wallet with old style mnemonics.
+      res.was_deprecated = true;
+    }
+
+    if (old_language == crypto::ElectrumWords::old_language_name)
+    {
+      if (req.language.empty())
+      {
+        er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+        er.message = "Wallet was using the old seed language. You need to specify a new seed language.";
+        return false;
+      }
+      std::vector<std::string> language_list;
+      std::vector<std::string> language_list_en;
+      crypto::ElectrumWords::get_language_list(language_list);
+      crypto::ElectrumWords::get_language_list(language_list_en, true);
+      if (std::find(language_list.begin(), language_list.end(), req.language) == language_list.end() &&
+          std::find(language_list_en.begin(), language_list_en.end(), req.language) == language_list_en.end())
+      {
+        er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+        er.message = "Wallet was using the old seed language, and the specified new seed language is invalid.";
+        return false;
+      }
+      mnemonic_language = req.language;
+    }
+
+    wal->set_seed_language(mnemonic_language);
+
+    crypto::secret_key recovery_val;
+    try
+    {
+      recovery_val = wal->generate(wallet_file, std::move(rc.second).password(), recovery_key, true, false, false);
+      MINFO("Wallet has been restored.\n");
+    }
+    catch (const std::exception &e)
+    {
+      handle_rpc_exception(std::current_exception(), er, WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR);
+      return false;
+    }
+
+    // // Convert the secret key back to seed
+    epee::wipeable_string electrum_words;
+    if (!crypto::ElectrumWords::bytes_to_words(recovery_val, electrum_words, mnemonic_language))
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "Failed to encode seed";
+      return false;
+    }
+    res.seed = electrum_words.data();
+
+    if (!wal)
+    {
+      er.code = WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR;
+      er.message = "Failed to generate wallet";
+      return false;
+    }
+
+    // set blockheight if given
+    try
+    {
+      wal->set_refresh_from_block_height(req.restore_height);
+      wal->rewrite(wallet_file, password);
+    }
+    catch (const std::exception &e)
+    {
+      handle_rpc_exception(std::current_exception(), er, WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR);
+      return false;
+    }
+
+    if (m_wallet)
+    {
+      try
+      {
+        m_wallet->store();
+      }
+      catch (const std::exception &e)
+      {
+        handle_rpc_exception(std::current_exception(), er, WALLET_RPC_ERROR_CODE_UNKNOWN_ERROR);
+        return false;
+      }
+      delete m_wallet;
+    }
+    m_wallet = wal.release();
+    res.address = m_wallet->get_account().get_public_address_str(m_wallet->nettype());
+    res.info = "Wallet has been restored successfully.";
+    return true;
+  }
+  //------------------------------------------------------------------------------------------------------------------------------
   bool wallet_rpc_server::on_is_multisig(const wallet_rpc::COMMAND_RPC_IS_MULTISIG::request& req, wallet_rpc::COMMAND_RPC_IS_MULTISIG::response& res, epee::json_rpc::error& er)
   {
     if (!m_wallet) return not_open(er);