Merge pull request #1949

0ee018b4 wallet2: do not go over the target tx size if many destinations (moneromooo-monero)
9ae566d0 simplewallet: fix cold signing of split transactions (moneromooo-monero)
aae14a10 simplewallet: allow setting confirm-missing-payment-id in watch wallets (moneromooo-monero)

src/simplewallet/simplewallet.cpp

@@ -560,12 +560,6 @@ bool simple_wallet::set_refresh_type(const std::vector<std::string> &args/* = st
 
 bool simple_wallet::set_confirm_missing_payment_id(const std::vector<std::string> &args/* = std::vector<std::string>()*/)
 {
-  if (m_wallet->watch_only())
-  {
-    fail_msg_writer() << tr("wallet is watch-only and cannot transfer");
-    return true;
-  }
-
   const auto pwd_container = get_and_verify_password();
   if (pwd_container)
   {
@@ -2911,6 +2905,7 @@ bool simple_wallet::accept_loaded_tx(const std::function<size_t()> get_num_txes,
   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());
+  int first_known_non_zero_change_index = -1;
   for (size_t n = 0; n < get_num_txes(); ++n)
   {
     const tools::wallet2::tx_construction_data &cd = get_tx(n);
@@ -2945,10 +2940,15 @@ bool simple_wallet::accept_loaded_tx(const std::function<size_t()> get_num_txes,
         fail_msg_writer() << tr("Claimed change is larger than payment to the change address");
         return false;
       }
-      if (memcmp(&cd.change_dts.addr, &get_tx(0).change_dts.addr, sizeof(cd.change_dts.addr)))
+      if (cd.change_dts.amount > 0)
       {
-        fail_msg_writer() << tr("Change does to more than one address");
+        if (first_known_non_zero_change_index == -1)
-        return false;
+          first_known_non_zero_change_index = n;
+        if (memcmp(&cd.change_dts.addr, &get_tx(first_known_non_zero_change_index).change_dts.addr, sizeof(cd.change_dts.addr)))
+        {
+          fail_msg_writer() << tr("Change goes to more than one address");
+          return false;
+        }
       }
       change += cd.change_dts.amount;
       it->second -= cd.change_dts.amount;

src/wallet/wallet2.cpp

@@ -4102,6 +4102,14 @@ static size_t estimate_rct_tx_size(int n_inputs, int mixin, int n_outputs)
   return size;
 }
 
+static size_t estimate_tx_size(bool use_rct, int n_inputs, int mixin, int n_outputs)
+{
+  if (use_rct)
+    return estimate_rct_tx_size(n_inputs, mixin, n_outputs + 1);
+  else
+    return n_inputs * (mixin+1) * APPROXIMATE_INPUT_BYTES;
+}
+
 std::vector<size_t> wallet2::pick_preferred_rct_inputs(uint64_t needed_money) const
 {
   std::vector<size_t> picks;
@@ -4409,7 +4417,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
     }
     else
     {
-      while (!dsts.empty() && dsts[0].amount <= available_amount)
+      while (!dsts.empty() && dsts[0].amount <= available_amount && estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size()) < TX_SIZE_TARGET(upper_transaction_size_limit))
       {
         // we can fully pay that destination
         LOG_PRINT_L2("We can fully pay " << get_account_address_as_str(m_testnet, dsts[0].addr) <<
@@ -4420,7 +4428,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
         pop_index(dsts, 0);
       }
 
-      if (available_amount > 0 && !dsts.empty()) {
+      if (available_amount > 0 && !dsts.empty() && estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size()) < TX_SIZE_TARGET(upper_transaction_size_limit)) {
         // we can partially fill that destination
         LOG_PRINT_L2("We can partially pay " << get_account_address_as_str(m_testnet, dsts[0].addr) <<
           " for " << print_money(available_amount) << "/" << print_money(dsts[0].amount));
@@ -4441,11 +4449,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
     }
     else
     {
-      size_t estimated_rct_tx_size;
+      const size_t estimated_rct_tx_size = estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size());
-      if (use_rct)
-        estimated_rct_tx_size = estimate_rct_tx_size(tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
-      else
-        estimated_rct_tx_size = tx.selected_transfers.size() * (fake_outs_count+1) * APPROXIMATE_INPUT_BYTES;
       try_tx = dsts.empty() || (estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit));
     }
 
@@ -4633,11 +4637,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_from(const crypton
     // here, check if we need to sent tx and start a new one
     LOG_PRINT_L2("Considering whether to create a tx now, " << tx.selected_transfers.size() << " inputs, tx limit "
       << upper_transaction_size_limit);
-    size_t estimated_rct_tx_size;
+    const size_t estimated_rct_tx_size = estimate_tx_size(use_rct, tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
-    if (use_rct)
-      estimated_rct_tx_size = estimate_rct_tx_size(tx.selected_transfers.size(), fake_outs_count, tx.dsts.size() + 1);
-    else
-      estimated_rct_tx_size = tx.selected_transfers.size() * (fake_outs_count+1) * APPROXIMATE_INPUT_BYTES;
     bool try_tx = (unused_dust_indices.empty() && unused_transfers_indices.empty()) || ( estimated_rct_tx_size >= TX_SIZE_TARGET(upper_transaction_size_limit));
 
     if (try_tx) {