simplewallet: add a store-tx-keys option to set

To enable storing tx keys in the (now encrypted) wallet cache.

src/simplewallet/simplewallet.cpp

@@ -334,6 +334,35 @@ bool simple_wallet::set_always_confirm_transfers(const std::vector<std::string>
   return true;
 }
 
+bool simple_wallet::set_store_tx_keys(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
+{
+  bool success = false;
+  if (m_wallet->watch_only())
+  {
+    fail_msg_writer() << tr("This wallet is watch-only and cannot transfer.");
+    return true;
+  }
+  tools::password_container pwd_container;
+  success = pwd_container.read_password();
+  if (!success)
+  {
+    fail_msg_writer() << tr("failed to read wallet password");
+    return true;
+  }
+
+  /* verify password before using so user doesn't accidentally set a new password for rewritten wallet */
+  success = m_wallet->verify_password(pwd_container.password());
+  if (!success)
+  {
+    fail_msg_writer() << tr("invalid password");
+    return true;
+  }
+
+  m_wallet->store_tx_keys(is_it_true(args[1]));
+  m_wallet->rewrite(m_wallet_file, pwd_container.password());
+  return true;
+}
+
 bool simple_wallet::help(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
 {
   success_msg_writer() << get_commands_str();
@@ -363,7 +392,7 @@ simple_wallet::simple_wallet()
   m_cmd_binder.set_handler("viewkey", boost::bind(&simple_wallet::viewkey, this, _1), tr("Get viewkey"));
   m_cmd_binder.set_handler("spendkey", boost::bind(&simple_wallet::spendkey, this, _1), tr("Get spendkey"));
   m_cmd_binder.set_handler("seed", boost::bind(&simple_wallet::seed, this, _1), tr("Get deterministic seed"));
-  m_cmd_binder.set_handler("set", boost::bind(&simple_wallet::set_variable, this, _1), tr("available options: seed language - Set wallet seed langage; always-confirm-transfers <1|0> - whether to confirm unsplit txes"));
+  m_cmd_binder.set_handler("set", boost::bind(&simple_wallet::set_variable, this, _1), tr("available options: seed language - Set wallet seed langage; always-confirm-transfers <1|0> - whether to confirm unsplit txes; store-tx-keys <1|0> - whether to store per-tx private keys for future reference"));
   m_cmd_binder.set_handler("rescan_spent", boost::bind(&simple_wallet::rescan_spent, this, _1), tr("Rescan blockchain for spent outputs"));
   m_cmd_binder.set_handler("get_tx_key", boost::bind(&simple_wallet::get_tx_key, this, _1), tr("Get transaction key (r) for a given tx"));
   m_cmd_binder.set_handler("help", boost::bind(&simple_wallet::help, this, _1), tr("Show this help"));
@@ -408,6 +437,21 @@ bool simple_wallet::set_variable(const std::vector<std::string> &args)
         return true;
       }
     }
+    else if (args[0] == "store-tx-keys")
+    {
+      if (args.size() <= 1)
+      {
+        fail_msg_writer() << tr("set store-tx-keys: needs an argument (0 or 1)");
+        return true;
+      }
+      else
+      {
+        std::vector<std::string> local_args = args;
+        local_args.erase(local_args.begin(), local_args.begin()+2);
+        set_store_tx_keys(local_args);
+        return true;
+      }
+    }
   }
   fail_msg_writer() << tr("set: unrecognized argument(s)");
   return true;

src/simplewallet/simplewallet.h

@@ -99,6 +99,7 @@ namespace cryptonote
      */
     bool seed_set_language(const std::vector<std::string> &args = std::vector<std::string>());
     bool set_always_confirm_transfers(const std::vector<std::string> &args = std::vector<std::string>());
+    bool set_store_tx_keys(const std::vector<std::string> &args = std::vector<std::string>());
     bool help(const std::vector<std::string> &args = std::vector<std::string>());
     bool start_mining(const std::vector<std::string> &args);
     bool stop_mining(const std::vector<std::string> &args);