wallet2: wait for propagation timeout before marking tx as failed

src/wallet/wallet2.cpp

@@ -2963,6 +2963,8 @@ void wallet2::update_pool_state(std::vector<std::tuple<cryptonote::transaction,
   MTRACE("update_pool_state got pool");
 
   // remove any pending tx that's not in the pool
+  constexpr const std::chrono::seconds tx_propagation_timeout{CRYPTONOTE_DANDELIONPP_EMBARGO_AVERAGE * 3 / 2};
+  const auto now = std::chrono::system_clock::now();
   std::unordered_map<crypto::hash, wallet2::unconfirmed_transfer_details>::iterator it = m_unconfirmed_txs.begin();
   while (it != m_unconfirmed_txs.end())
   {
@@ -2990,9 +2992,11 @@ void wallet2::update_pool_state(std::vector<std::tuple<cryptonote::transaction,
         LOG_PRINT_L1("Pending txid " << txid << " not in pool, marking as not in pool");
         pit->second.m_state = wallet2::unconfirmed_transfer_details::pending_not_in_pool;
       }
-      else if (pit->second.m_state == wallet2::unconfirmed_transfer_details::pending_not_in_pool && refreshed)
+      else if (pit->second.m_state == wallet2::unconfirmed_transfer_details::pending_not_in_pool && refreshed &&
+        now > std::chrono::system_clock::from_time_t(pit->second.m_sent_time) + tx_propagation_timeout)
       {
-        LOG_PRINT_L1("Pending txid " << txid << " not in pool, marking as failed");
+        LOG_PRINT_L1("Pending txid " << txid << " not in pool after " << tx_propagation_timeout.count() <<
+          " seconds, marking as failed");
         pit->second.m_state = wallet2::unconfirmed_transfer_details::failed;
 
         // the inputs aren't spent anymore, since the tx failed