wallet2: fix wrong change being recorded for cold signed txes

src/wallet/wallet2.cpp

@@ -2730,7 +2730,7 @@ void wallet2::add_unconfirmed_tx(const cryptonote::transaction& tx, uint64_t amo
   utd.m_amount_out = 0;
   for (const auto &d: dests)
     utd.m_amount_out += d.amount;
-  utd.m_amount_out += change_amount;
+  utd.m_amount_out += change_amount; // dests does not contain change
   utd.m_change = change_amount;
   utd.m_sent_time = time(NULL);
   utd.m_tx = (const cryptonote::transaction_prefix&)tx;
@@ -3057,7 +3057,7 @@ bool wallet2::sign_tx(const std::string &unsigned_filename, const std::string &s
     ptx.change_dts = sd.change_dts;
     ptx.selected_transfers = sd.selected_transfers;
     ptx.tx_key = rct::rct2sk(rct::identity()); // don't send it back to the untrusted view wallet
-    ptx.dests = sd.splitted_dsts;
+    ptx.dests = sd.dests;
     ptx.construction_data = sd;
 
     txs.push_back(ptx);
@@ -3656,6 +3656,7 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
   ptx.construction_data.extra = tx.extra;
   ptx.construction_data.unlock_time = unlock_time;
   ptx.construction_data.use_rct = false;
+  ptx.construction_data.dests = dsts;
 }
 
 void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry> dsts, const std::list<size_t> selected_transfers, size_t fake_outputs_count,
@@ -3776,6 +3777,7 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
   ptx.construction_data.extra = tx.extra;
   ptx.construction_data.unlock_time = unlock_time;
   ptx.construction_data.use_rct = true;
+  ptx.construction_data.dests = dsts;
 }
 
 static size_t estimate_rct_tx_size(int n_inputs, int mixin, int n_outputs)

src/wallet/wallet2.h

@@ -191,11 +191,12 @@ namespace tools
     {
       std::vector<cryptonote::tx_source_entry> sources;
       cryptonote::tx_destination_entry change_dts;
-      std::vector<cryptonote::tx_destination_entry> splitted_dsts;
+      std::vector<cryptonote::tx_destination_entry> splitted_dsts; // split, includes change
       std::list<size_t> selected_transfers;
       std::vector<uint8_t> extra;
       uint64_t unlock_time;
       bool use_rct;
+      std::vector<cryptonote::tx_destination_entry> dests; // original setup, does not include change
 
       BEGIN_SERIALIZE_OBJECT()
         FIELD(sources)
@@ -205,12 +206,16 @@ namespace tools
         FIELD(extra)
         VARINT_FIELD(unlock_time)
         FIELD(use_rct)
+        FIELD(dests)
       END_SERIALIZE()
     };
 
     typedef std::vector<transfer_details> transfer_container;
     typedef std::unordered_multimap<crypto::hash, payment_details> payment_container;
 
+    // The convention for destinations is:
+    // dests does not include change
+    // splitted_dsts (in construction_data) does
     struct pending_tx
     {
       cryptonote::transaction tx;
@@ -1047,6 +1052,7 @@ namespace tools
     ptx.construction_data.extra = tx.extra;
     ptx.construction_data.unlock_time = unlock_time;
     ptx.construction_data.use_rct = false;
+    ptx.construction_data.dests = dsts;
   }