wallet: improve error messages when not enough money for transfer

1 files changed, 8 insertions, 2 deletions

diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index 98dbc4fd6..f589b0821 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -3457,6 +3457,12 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
   }
   LOG_PRINT_L2("Starting with " << unused_transfers_indices.size() << " non-dust outputs and " << unused_dust_indices.size() << " dust outputs");
 
+  // early out if we know we can't make it anyway
+  // we could also check for being within FEE_PER_KB, but if the fee calculation
+  // ever changes, this might be missed, so let this go through
+  THROW_WALLET_EXCEPTION_IF(needed_money > unlocked_balance(), error::not_enough_money,
+      unlocked_balance(), needed_money, 0);
+
   if (unused_dust_indices.empty() && unused_transfers_indices.empty())
     return std::vector<wallet2::pending_tx>();
 
@@ -3497,7 +3503,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
     // if we need to spend money and don't have any left, we fail
     if (unused_dust_indices.empty() && unused_transfers_indices.empty()) {
       LOG_PRINT_L2("No more outputs to choose from");
-      THROW_WALLET_EXCEPTION_IF(1, error::not_enough_money, unlocked_balance(), needed_money, accumulated_fee + needed_fee);
+      THROW_WALLET_EXCEPTION_IF(1, error::tx_not_possible, unlocked_balance(), needed_money, accumulated_fee + needed_fee);
     }
 
     // get a random unspent output and use it to pay part (or all) of the current destination (and maybe next one, etc)
@@ -3637,7 +3643,7 @@ std::vector<wallet2::pending_tx> wallet2::create_transactions_2(std::vector<cryp
   if (adding_fee)
   {
     LOG_PRINT_L1("We ran out of outputs while trying to gather final fee");
-    THROW_WALLET_EXCEPTION_IF(1, error::not_enough_money, unlocked_balance(), needed_money, accumulated_fee + needed_fee);
+    THROW_WALLET_EXCEPTION_IF(1, error::tx_not_possible, unlocked_balance(), needed_money, accumulated_fee + needed_fee);
   }
 
   LOG_PRINT_L1("Done creating " << txes.size() << " transactions, " << print_money(accumulated_fee) <<