make tx keys available to the user

They are also stored in the cache file, to be retrieved using
a new get_tx_key command.

2 files changed, 33 insertions, 0 deletions

diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 0c91d9787..ff60ea38e 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -365,6 +365,7 @@ simple_wallet::simple_wallet()
   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("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"));
 }
 //----------------------------------------------------------------------------------------------------
@@ -1724,6 +1725,37 @@ bool simple_wallet::sweep_dust(const std::vector<std::string> &args_)
   return true;
 }
 //----------------------------------------------------------------------------------------------------
+bool simple_wallet::get_tx_key(const std::vector<std::string> &args_)
+{
+  std::vector<std::string> local_args = args_;
+
+  if(local_args.size() != 1) {
+    fail_msg_writer() << tr("Usage: get_tx_key <txid>");
+    return true;
+  }
+
+  cryptonote::blobdata txid_data;
+  if(!epee::string_tools::parse_hexstr_to_binbuff(local_args.front(), txid_data))
+  {
+    fail_msg_writer() << tr("Failed to parse txid");
+    return false;
+  }
+  crypto::hash txid = *reinterpret_cast<const crypto::hash*>(txid_data.data());
+
+  crypto::secret_key tx_key;
+  bool r = m_wallet->get_tx_key(txid, tx_key);
+  if (r)
+  {
+    success_msg_writer() << tr("tx key: ") << tx_key;
+    return true;
+  }
+  else
+  {
+    fail_msg_writer() << tr("No tx key found for this txid");
+    return true;
+  }
+}
+//----------------------------------------------------------------------------------------------------
 bool simple_wallet::run()
 {
   std::string addr_start = m_wallet->get_account().get_public_address_str(m_wallet->testnet()).substr(0, 6);
diff --git a/src/simplewallet/simplewallet.h b/src/simplewallet/simplewallet.h
index 8aca93210..7db56cdec 100644
--- a/src/simplewallet/simplewallet.h
+++ b/src/simplewallet/simplewallet.h
@@ -122,6 +122,7 @@ namespace cryptonote
     bool set_variable(const std::vector<std::string> &args);
     bool rescan_spent(const std::vector<std::string> &args);
     bool set_log(const std::vector<std::string> &args);
+    bool get_tx_key(const std::vector<std::string> &args);
 
     uint64_t get_daemon_blockchain_height(std::string& err);
     bool try_connect_to_daemon();