wallet2: default to trying to keep 5 outputs of 2+ monero

In the case where previously a second unneeded output would be
added to a transaction. This should help *some* of the cases
where outputs are slowly being consolidated, leading to the
whole balance being locked when sending monero.

1 files changed, 13 insertions, 3 deletions

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 831166d5f..013a9671b 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -131,6 +131,9 @@ using namespace cryptonote;
 #define GAMMA_SHAPE 19.28
 #define GAMMA_SCALE (1/1.61)
 
+#define DEFAULT_MIN_OUTPUT_COUNT 5
+#define DEFAULT_MIN_OUTPUT_VALUE (2*COIN)
+
 static const std::string MULTISIG_SIGNATURE_MAGIC = "SigMultisigPkV1";
 static const std::string MULTISIG_EXTRA_INFO_MAGIC = "MultisigxV1";
 
@@ -9373,9 +9376,16 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
       idx = pop_best_value(indices, tx.selected_transfers, true);
 
       // we might not want to add it if it's a large output and we don't have many left
-      if (m_transfers[idx].amount() >= m_min_output_value) {
-        if (get_count_above(m_transfers, *unused_transfers_indices, m_min_output_value) < m_min_output_count) {
-          LOG_PRINT_L2("Second output was not strictly needed, and we're running out of outputs above " << print_money(m_min_output_value) << ", not adding");
+      uint64_t min_output_value = m_min_output_value;
+      uint32_t min_output_count = m_min_output_count;
+      if (min_output_value == 0 && min_output_count == 0)
+      {
+        min_output_value = DEFAULT_MIN_OUTPUT_VALUE;
+        min_output_count = DEFAULT_MIN_OUTPUT_COUNT;
+      }
+      if (m_transfers[idx].amount() >= min_output_value) {
+        if (get_count_above(m_transfers, *unused_transfers_indices, min_output_value) < min_output_count) {
+          LOG_PRINT_L2("Second output was not strictly needed, and we're running out of outputs above " << print_money(min_output_value) << ", not adding");
           break;
         }
       }