wallet: print tx overview on submit_transfer too

This is on the potentially compromised wallet, but still guards
against stupid mistakes.

src/simplewallet/simplewallet.cpp

@@ -3111,16 +3111,16 @@ bool simple_wallet::sweep_all(const std::vector<std::string> &args_)
   return true;
 }
 //----------------------------------------------------------------------------------------------------
-bool simple_wallet::accept_loaded_tx(const tools::wallet2::unsigned_tx_set &txs)
+bool simple_wallet::accept_loaded_tx(const std::function<size_t()> get_num_txes, const std::function<const tools::wallet2::tx_construction_data&(size_t)> &get_tx)
 {
   // gather info to ask the user
   uint64_t amount = 0, amount_to_dests = 0, change = 0;
   size_t min_mixin = ~0;
   std::unordered_map<std::string, uint64_t> dests;
   const std::string wallet_address = m_wallet->get_account().get_public_address_str(m_wallet->testnet());
-  for (size_t n = 0; n < txs.txes.size(); ++n)
+  for (size_t n = 0; n < get_num_txes(); ++n)
   {
-    const tools::wallet2::tx_construction_data &cd = txs.txes[n];
+    const tools::wallet2::tx_construction_data &cd = get_tx(n);
     for (size_t s = 0; s < cd.sources.size(); ++s)
     {
       amount += cd.sources[s].amount;
@@ -3168,11 +3168,21 @@ bool simple_wallet::accept_loaded_tx(const tools::wallet2::unsigned_tx_set &txs)
     dest_string = tr("with no destinations");
 
   uint64_t fee = amount - amount_to_dests;
-  std::string prompt_str = (boost::format(tr("Loaded %lu transactions, for %s, fee %s, change %s, %s, with min mixin %lu. Is this okay? (Y/Yes/N/No)")) % (unsigned long)txs.txes.size() % print_money(amount) % print_money(fee) % print_money(change) % dest_string % (unsigned long)min_mixin).str();
+  std::string prompt_str = (boost::format(tr("Loaded %lu transactions, for %s, fee %s, change %s, %s, with min mixin %lu. Is this okay? (Y/Yes/N/No)")) % (unsigned long)get_num_txes() % print_money(amount) % print_money(fee) % print_money(change) % dest_string % (unsigned long)min_mixin).str();
   std::string accepted = command_line::input_line(prompt_str);
   return is_it_true(accepted);
 }
 //----------------------------------------------------------------------------------------------------
+bool simple_wallet::accept_loaded_tx(const tools::wallet2::unsigned_tx_set &txs)
+{
+  return accept_loaded_tx([&txs](){return txs.txes.size();}, [&txs](size_t n)->const tools::wallet2::tx_construction_data&{return txs.txes[n];});
+}
+//----------------------------------------------------------------------------------------------------
+bool simple_wallet::accept_loaded_tx(const tools::wallet2::signed_tx_set &txs)
+{
+  return accept_loaded_tx([&txs](){return txs.ptx.size();}, [&txs](size_t n)->const tools::wallet2::tx_construction_data&{return txs.ptx[n].construction_data;});
+}
+//----------------------------------------------------------------------------------------------------
 bool simple_wallet::sign_transfer(const std::vector<std::string> &args_)
 {
   if(m_wallet->watch_only())
@@ -3208,7 +3218,7 @@ bool simple_wallet::submit_transfer(const std::vector<std::string> &args_)
   try
   {
     std::vector<tools::wallet2::pending_tx> ptx_vector;
-    bool r = m_wallet->load_tx("signed_monero_tx", ptx_vector);
+    bool r = m_wallet->load_tx("signed_monero_tx", ptx_vector, [&](const tools::wallet2::signed_tx_set &tx){ return accept_loaded_tx(tx); });
     if (!r)
     {
       fail_msg_writer() << tr("Failed to load transaction from file");

src/simplewallet/simplewallet.h

@@ -156,7 +156,9 @@ namespace cryptonote
     uint64_t get_daemon_blockchain_height(std::string& err);
     bool try_connect_to_daemon(bool silent = false);
     bool ask_wallet_create_if_needed();
+    bool accept_loaded_tx(const std::function<size_t()> get_num_txes, const std::function<const tools::wallet2::tx_construction_data&(size_t)> &get_tx);
     bool accept_loaded_tx(const tools::wallet2::unsigned_tx_set &txs);
+    bool accept_loaded_tx(const tools::wallet2::signed_tx_set &txs);
     bool get_address_from_str(const std::string &str, cryptonote::account_public_address &address, bool &has_payment_id, crypto::hash8 &payment_id);
 
     /*!

src/wallet/wallet2.cpp

@@ -2678,7 +2678,7 @@ bool wallet2::sign_tx(const std::string &unsigned_filename, const std::string &s
   return epee::file_io_utils::save_string_to_file(signed_filename, std::string(SIGNED_TX_PREFIX) + s);
 }
 //----------------------------------------------------------------------------------------------------
-bool wallet2::load_tx(const std::string &signed_filename, std::vector<tools::wallet2::pending_tx> &ptx)
+bool wallet2::load_tx(const std::string &signed_filename, std::vector<tools::wallet2::pending_tx> &ptx, std::function<bool(const signed_tx_set&)> accept_func)
 {
   std::string s;
   boost::system::error_code errcode;
@@ -2709,6 +2709,12 @@ bool wallet2::load_tx(const std::string &signed_filename, std::vector<tools::wal
   LOG_PRINT_L0("Loaded signed tx data from binary: " << signed_txs.ptx.size() << " transactions");
   for (auto &ptx: signed_txs.ptx) LOG_PRINT_L0(cryptonote::obj_to_json_str(ptx.tx));
 
+  if (accept_func && !accept_func(signed_txs))
+  {
+    LOG_PRINT_L1("Transactions rejected by callback");
+    return false;
+  }
+
   ptx = signed_txs.ptx;
 
   return true;

src/wallet/wallet2.h

@@ -357,7 +357,7 @@ namespace tools
     void commit_tx(std::vector<pending_tx>& ptx_vector);
     bool save_tx(const std::vector<pending_tx>& ptx_vector, const std::string &filename);
     bool sign_tx(const std::string &unsigned_filename, const std::string &signed_filename, std::function<bool(const unsigned_tx_set&)> accept_func = NULL);
-    bool load_tx(const std::string &signed_filename, std::vector<tools::wallet2::pending_tx> &ptx);
+    bool load_tx(const std::string &signed_filename, std::vector<tools::wallet2::pending_tx> &ptx, std::function<bool(const signed_tx_set&)> accept_func = NULL);
     std::vector<pending_tx> create_transactions(std::vector<cryptonote::tx_destination_entry> dsts, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t> extra, bool trusted_daemon);
     std::vector<wallet2::pending_tx> create_transactions_2(std::vector<cryptonote::tx_destination_entry> dsts, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t> extra, bool trusted_daemon);
     std::vector<wallet2::pending_tx> create_transactions_all(const cryptonote::account_public_address &address, const size_t fake_outs_count, const uint64_t unlock_time, uint32_t priority, const std::vector<uint8_t> extra, bool trusted_daemon);