monero-wallet-cli: Added command scan_tx

To implement this feature, the wallet2::scan_tx API was implemented.

src/simplewallet/simplewallet.cpp

@@ -282,6 +282,7 @@ namespace
   const char* USAGE_VERSION("version");
   const char* USAGE_HELP("help [<command> | all]");
   const char* USAGE_APROPOS("apropos <keyword> [<keyword> ...]");
+  const char* USAGE_SCAN_TX("scan_tx <txid> [<txid> ...]");
 
   std::string input_line(const std::string& prompt, bool yesno = false)
   {
@@ -3214,6 +3215,45 @@ bool simple_wallet::apropos(const std::vector<std::string> &args)
   return true;
 }
 
+bool simple_wallet::scan_tx(const std::vector<std::string> &args)
+{
+  if (args.empty())
+  {
+    PRINT_USAGE(USAGE_SCAN_TX);
+    return true;
+  }
+
+  // Parse and dedup args
+  std::unordered_set<crypto::hash> txids;
+  for (const auto &s : args) {
+    crypto::hash txid;
+    if (!epee::string_tools::hex_to_pod(s, txid)) {
+      fail_msg_writer() << tr("Invalid txid specified: ") << s;
+      return true;
+    }
+    txids.insert(txid);
+  }
+  std::vector<crypto::hash> txids_v(txids.begin(), txids.end());
+
+  if (!m_wallet->is_trusted_daemon()) {
+    message_writer(console_color_red, true) << tr("WARNING: this operation may reveal the txids to the remote node and affect your privacy");
+    if (!command_line::is_yes(input_line("Do you want to continue?", true))) {
+      message_writer() << tr("You have canceled the operation");
+      return true;
+    }
+  }
+
+  LOCK_IDLE_SCOPE();
+  m_in_manual_refresh.store(true);
+  try {
+    m_wallet->scan_tx(txids_v);
+  } catch (const std::exception &e) {
+    fail_msg_writer() << e.what();
+  }
+  m_in_manual_refresh.store(false);
+  return true;
+}
+
 simple_wallet::simple_wallet()
   : m_allow_mismatched_daemon_version(false)
   , m_refresh_progress_reporter(*this)
@@ -3763,6 +3803,10 @@ simple_wallet::simple_wallet()
                            boost::bind(&simple_wallet::on_command, this, &simple_wallet::apropos, _1),
                            tr(USAGE_APROPOS),
                            tr("Search all command descriptions for keyword(s)"));
+ m_cmd_binder.set_handler("scan_tx",
+                           boost::bind(&simple_wallet::on_command, this, &simple_wallet::scan_tx, _1),
+                           tr(USAGE_SCAN_TX),
+                           tr("Scan the transactions given by <txid>(s), processing them and looking for outputs"));
   m_cmd_binder.set_unknown_command_handler(boost::bind(&simple_wallet::on_command, this, &simple_wallet::on_unknown_command, _1));
   m_cmd_binder.set_empty_command_handler(boost::bind(&simple_wallet::on_empty_command, this));
   m_cmd_binder.set_cancel_handler(boost::bind(&simple_wallet::on_cancelled_command, this));
@@ -11648,4 +11692,3 @@ bool simple_wallet::mms(const std::vector<std::string> &args)
   return true;
 }
 // End MMS ------------------------------------------------------------------------------------------------
-

src/simplewallet/simplewallet.h

@@ -158,6 +158,7 @@ namespace cryptonote
     bool set_credits_target(const std::vector<std::string> &args = std::vector<std::string>());
     bool help(const std::vector<std::string> &args = std::vector<std::string>());
     bool apropos(const std::vector<std::string> &args);
+    bool scan_tx(const std::vector<std::string> &args);
     bool start_mining(const std::vector<std::string> &args);
     bool stop_mining(const std::vector<std::string> &args);
     bool set_daemon(const std::vector<std::string> &args);

src/wallet/wallet2.cpp

@@ -30,6 +30,7 @@
 
 #include <numeric>
 #include <tuple>
+#include <queue>
 #include <boost/format.hpp>
 #include <boost/optional/optional.hpp>
 #include <boost/algorithm/string/classification.hpp>
@@ -1602,6 +1603,47 @@ std::string wallet2::get_subaddress_label(const cryptonote::subaddress_index& in
   return m_subaddress_labels[index.major][index.minor];
 }
 //----------------------------------------------------------------------------------------------------
+void wallet2::scan_tx(const std::vector<crypto::hash> &txids)
+{
+  // Get the transactions from daemon in batches and add them to a priority queue ordered in chronological order
+  auto cmp_tx_entry = [](const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::entry& l, const cryptonote::COMMAND_RPC_GET_TRANSACTIONS::entry& r)
+  { return l.block_height > r.block_height; };
+
+  std::priority_queue<cryptonote::COMMAND_RPC_GET_TRANSACTIONS::entry, std::vector<COMMAND_RPC_GET_TRANSACTIONS::entry>, decltype(cmp_tx_entry)> txq(cmp_tx_entry);
+  const size_t SLICE_SIZE =  100; // RESTRICTED_TRANSACTIONS_COUNT as defined in rpc/core_rpc_server.cpp, hardcoded in daemon code
+  for(size_t slice = 0; slice < txids.size(); slice += SLICE_SIZE) {
+    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::request req = AUTO_VAL_INIT(req);
+    cryptonote::COMMAND_RPC_GET_TRANSACTIONS::response res = AUTO_VAL_INIT(res);
+    req.decode_as_json = false;
+    req.prune = true;
+
+    size_t ntxes = slice + SLICE_SIZE > txids.size() ? txids.size() - slice : SLICE_SIZE;
+    for (size_t i = slice; i < slice + ntxes; ++i)
+     req.txs_hashes.push_back(epee::string_tools::pod_to_hex(txids[i]));
+
+    {
+      const boost::lock_guard<boost::recursive_mutex> lock{m_daemon_rpc_mutex};
+      req.client = get_client_signature();
+      bool r = epee::net_utils::invoke_http_json("/gettransactions", req, res, *m_http_client, rpc_timeout);
+      THROW_WALLET_EXCEPTION_IF(!r, error::wallet_internal_error, "Failed to get transaction from daemon");
+      THROW_WALLET_EXCEPTION_IF(res.txs.size() != req.txs_hashes.size(), error::wallet_internal_error, "Failed to get transaction from daemon");
+    }
+
+    for (auto& tx_info : res.txs)
+      txq.push(tx_info);
+  }
+
+  // Process the transactions in chronologically ascending order
+  while(!txq.empty()) {
+    auto& tx_info = txq.top();
+    cryptonote::transaction tx;
+    crypto::hash tx_hash;
+    THROW_WALLET_EXCEPTION_IF(!get_pruned_tx(tx_info, tx, tx_hash), error::wallet_internal_error, "Failed to get transaction from daemon (2)");
+    process_new_transaction(tx_hash, tx, tx_info.output_indices, tx_info.block_height, 0, tx_info.block_timestamp, false, tx_info.in_pool, tx_info.double_spend_seen, {}, {});
+    txq.pop();
+  }
+}
+//----------------------------------------------------------------------------------------------------
 void wallet2::set_subaddress_label(const cryptonote::subaddress_index& index, const std::string &label)
 {
   THROW_WALLET_EXCEPTION_IF(index.major >= m_subaddress_labels.size(), error::account_index_outofbound);

src/wallet/wallet2.h

@@ -1264,6 +1264,8 @@ private:
     std::string get_spend_proof(const crypto::hash &txid, const std::string &message);
     bool check_spend_proof(const crypto::hash &txid, const std::string &message, const std::string &sig_str);
 
+    void scan_tx(const std::vector<crypto::hash> &txids);
+
     /*!
      * \brief  Generates a proof that proves the reserve of unspent funds
      * \param  account_minreserve       When specified, collect outputs only belonging to the given account and prove the smallest reserve above the given amount