Merge pull request #2309

d58700e0 WalletAPI: only allow trusted daemon when importing key images (Jaquee)
8a9bbd26 WalletAPI: copy wallet data when creating a view only wallet (Jaquee)
d27fe32e wallet2: export/import wallet data functions (Jaquee)
225a25f3 import_key_images - allow importing without being connected to daemon (Jaquee)

3 files changed, 111 insertions, 20 deletions

diff --git a/src/wallet/api/wallet.cpp b/src/wallet/api/wallet.cpp
index c0974f880..7afc1f449 100644
--- a/src/wallet/api/wallet.cpp
+++ b/src/wallet/api/wallet.cpp
@@ -379,7 +379,32 @@ bool WalletImpl::createWatchOnly(const std::string &path, const std::string &pas
     const cryptonote::account_public_address address = m_wallet->get_account().get_keys().m_account_address;
 
     try {
+        // Generate view only wallet
         view_wallet->generate(path, password, address, viewkey);
+
+        // Export/Import outputs
+        auto outputs = m_wallet->export_outputs();
+        view_wallet->import_outputs(outputs);
+
+        // Copy scanned blockchain
+        auto bc = m_wallet->export_blockchain();
+        view_wallet->import_blockchain(bc);
+
+        // copy payments
+        auto payments = m_wallet->export_payments();
+        view_wallet->import_payments(payments);
+
+        // copy confirmed outgoing payments
+        std::list<std::pair<crypto::hash, tools::wallet2::confirmed_transfer_details>> out_payments;
+        m_wallet->get_payments_out(out_payments, 0);
+        view_wallet->import_payments_out(out_payments);
+
+        // Export/Import key images
+        // We already know the spent status from the outputs we exported, thus no need to check them again
+        auto key_images = m_wallet->export_key_images();
+        uint64_t spent = 0;
+        uint64_t unspent = 0;
+        view_wallet->import_key_images(key_images,spent,unspent,false);
         m_status = Status_Ok;
     } catch (const std::exception &e) {
         LOG_ERROR("Error creating view only wallet: " << e.what());
@@ -387,6 +412,8 @@ bool WalletImpl::createWatchOnly(const std::string &path, const std::string &pas
         m_errorString = e.what();
         return false;
     }
+    // Store wallet
+    view_wallet->store();
     return true;
 }
 
@@ -862,6 +889,11 @@ bool WalletImpl::exportKeyImages(const string &filename)
 
 bool WalletImpl::importKeyImages(const string &filename)
 {
+  if (!trustedDaemon()) {
+    m_status = Status_Error;
+    m_errorString = tr("Key images can only be imported with a trusted daemon");
+    return false;
+  }
   try
   {
     uint64_t spent = 0, unspent = 0;
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 09ca8efe1..4f21e3e77 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -5330,7 +5330,7 @@ uint64_t wallet2::import_key_images(const std::string &filename, uint64_t &spent
 }
 
 //----------------------------------------------------------------------------------------------------
-uint64_t wallet2::import_key_images(const std::vector<std::pair<crypto::key_image, crypto::signature>> &signed_key_images, uint64_t &spent, uint64_t &unspent)
+uint64_t wallet2::import_key_images(const std::vector<std::pair<crypto::key_image, crypto::signature>> &signed_key_images, uint64_t &spent, uint64_t &unspent, bool check_spent)
 {
   COMMAND_RPC_IS_KEY_IMAGE_SPENT::request req = AUTO_VAL_INIT(req);
   COMMAND_RPC_IS_KEY_IMAGE_SPENT::response daemon_resp = AUTO_VAL_INIT(daemon_resp);
@@ -5379,34 +5379,88 @@ uint64_t wallet2::import_key_images(const std::vector<std::pair<crypto::key_imag
     m_transfers[n].m_key_image_known = true;
   }
 
-  m_daemon_rpc_mutex.lock();
-  bool r = epee::net_utils::invoke_http_json("/is_key_image_spent", req, daemon_resp, m_http_client, rpc_timeout);
-  m_daemon_rpc_mutex.unlock();
-  THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "is_key_image_spent");
-  THROW_WALLET_EXCEPTION_IF(daemon_resp.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "is_key_image_spent");
-  THROW_WALLET_EXCEPTION_IF(daemon_resp.status != CORE_RPC_STATUS_OK, error::is_key_image_spent_error, daemon_resp.status);
-  THROW_WALLET_EXCEPTION_IF(daemon_resp.spent_status.size() != signed_key_images.size(), error::wallet_internal_error,
-    "daemon returned wrong response for is_key_image_spent, wrong amounts count = " +
-    std::to_string(daemon_resp.spent_status.size()) + ", expected " +  std::to_string(signed_key_images.size()));
-
+  if(check_spent)
+  {
+    m_daemon_rpc_mutex.lock();
+    bool r = epee::net_utils::invoke_http_json("/is_key_image_spent", req, daemon_resp, m_http_client, rpc_timeout);
+    m_daemon_rpc_mutex.unlock();
+    THROW_WALLET_EXCEPTION_IF(!r, error::no_connection_to_daemon, "is_key_image_spent");
+    THROW_WALLET_EXCEPTION_IF(daemon_resp.status == CORE_RPC_STATUS_BUSY, error::daemon_busy, "is_key_image_spent");
+    THROW_WALLET_EXCEPTION_IF(daemon_resp.status != CORE_RPC_STATUS_OK, error::is_key_image_spent_error, daemon_resp.status);
+    THROW_WALLET_EXCEPTION_IF(daemon_resp.spent_status.size() != signed_key_images.size(), error::wallet_internal_error,
+      "daemon returned wrong response for is_key_image_spent, wrong amounts count = " +
+      std::to_string(daemon_resp.spent_status.size()) + ", expected " +  std::to_string(signed_key_images.size()));
+    for (size_t n = 0; n < daemon_resp.spent_status.size(); ++n)
+    {
+      transfer_details &td = m_transfers[n];
+      td.m_spent = daemon_resp.spent_status[n] != COMMAND_RPC_IS_KEY_IMAGE_SPENT::UNSPENT;
+    }
+  }
   spent = 0;
   unspent = 0;
-  for (size_t n = 0; n < daemon_resp.spent_status.size(); ++n)
+  for(size_t i = 0; i < m_transfers.size(); ++i)
   {
-    transfer_details &td = m_transfers[n];
+    transfer_details &td = m_transfers[i];
     uint64_t amount = td.amount();
-    td.m_spent = daemon_resp.spent_status[n] != COMMAND_RPC_IS_KEY_IMAGE_SPENT::UNSPENT;
     if (td.m_spent)
       spent += amount;
     else
       unspent += amount;
-    LOG_PRINT_L2("Transfer " << n << ": " << print_money(amount) << " (" << td.m_global_output_index << "): "
-        << (td.m_spent ? "spent" : "unspent") << " (key image " << req.key_images[n] << ")");
+    LOG_PRINT_L2("Transfer " << i << ": " << print_money(amount) << " (" << td.m_global_output_index << "): "
+        << (td.m_spent ? "spent" : "unspent") << " (key image " << req.key_images[i] << ")");
   }
-  LOG_PRINT_L1("Total: " << print_money(spent) << " spent, " << print_money(unspent) << " unspent");
-
+  MDEBUG("Total: " << print_money(spent) << " spent, " << print_money(unspent) << " unspent");
   return m_transfers[signed_key_images.size() - 1].m_block_height;
 }
+wallet2::payment_container wallet2::export_payments() const
+{
+  payment_container payments;
+  for (auto const &p : m_payments)
+  {
+    payments.emplace(p);
+  }
+  return payments;
+}
+void wallet2::import_payments(const payment_container &payments)
+{
+  m_payments.clear();
+  for (auto const &p : payments)
+  {
+    m_payments.emplace(p);
+  }
+}
+void wallet2::import_payments_out(const std::list<std::pair<crypto::hash,wallet2::confirmed_transfer_details>> &confirmed_payments)
+{
+  m_confirmed_txs.clear();
+  for (auto const &p : confirmed_payments)
+  {
+    m_confirmed_txs.emplace(p);
+  }
+}
+
+std::vector<crypto::hash> wallet2::export_blockchain() const
+{
+  std::vector<crypto::hash> bc;
+  for (auto const &b : m_blockchain)
+  {
+    bc.push_back(b);
+  }
+  return bc;
+}
+
+void wallet2::import_blockchain(const std::vector<crypto::hash> &bc)
+{
+  m_blockchain.clear();
+  for (auto const &b : bc)
+  {
+    m_blockchain.push_back(b);
+  }
+  cryptonote::block genesis;
+  generate_genesis(genesis);
+  crypto::hash genesis_hash = get_block_hash(genesis);
+  check_genesis(genesis_hash);
+  m_local_bc_height = m_blockchain.size();
+}
 //----------------------------------------------------------------------------------------------------
 std::vector<tools::wallet2::transfer_details> wallet2::export_outputs() const
 {
diff --git a/src/wallet/wallet2.h b/src/wallet/wallet2.h
index f30c97635..3d5033535 100644
--- a/src/wallet/wallet2.h
+++ b/src/wallet/wallet2.h
@@ -582,12 +582,17 @@ namespace tools
     std::string sign(const std::string &data) const;
     bool verify(const std::string &data, const cryptonote::account_public_address &address, const std::string &signature) const;
 
+    // Import/Export wallet data
     std::vector<tools::wallet2::transfer_details> export_outputs() const;
     size_t import_outputs(const std::vector<tools::wallet2::transfer_details> &outputs);
-
+    payment_container export_payments() const;
+    void import_payments(const payment_container &payments);
+    void import_payments_out(const std::list<std::pair<crypto::hash,wallet2::confirmed_transfer_details>> &confirmed_payments);
+    std::vector<crypto::hash> export_blockchain() const;
+    void import_blockchain(const std::vector<crypto::hash> &bc);
     bool export_key_images(const std::string filename);
     std::vector<std::pair<crypto::key_image, crypto::signature>> export_key_images() const;
-    uint64_t import_key_images(const std::vector<std::pair<crypto::key_image, crypto::signature>> &signed_key_images, uint64_t &spent, uint64_t &unspent);
+    uint64_t import_key_images(const std::vector<std::pair<crypto::key_image, crypto::signature>> &signed_key_images, uint64_t &spent, uint64_t &unspent, bool check_spent = true);
     uint64_t import_key_images(const std::string &filename, uint64_t &spent, uint64_t &unspent);
 
     void update_pool_state(bool refreshed = false);