wallet: encapsulate pre-selected-inputs lookup into its own function

First step towards decoupling the pre-selected-inputs fetching functionality
from `SelectCoins`. Which, will let us not waste resources calculating the
available coins if one of the pre-set inputs has an error.

(right now, if one of the pre-set inputs is invalid, we first walk through
the entire wallet txes map just to end up failing right after it finish)

1 files changed, 6 insertions, 0 deletions

diff --git a/src/wallet/coinselection.cpp b/src/wallet/coinselection.cpp
index b568e90998..a8be6cd83a 100644
--- a/src/wallet/coinselection.cpp
+++ b/src/wallet/coinselection.cpp
@@ -444,6 +444,12 @@ void SelectionResult::AddInput(const OutputGroup& group)
     m_use_effective = !group.m_subtract_fee_outputs;
 }
 
+void SelectionResult::AddInputs(const std::set<COutput>& inputs, bool subtract_fee_outputs)
+{
+    util::insert(m_selected_inputs, inputs);
+    m_use_effective = !subtract_fee_outputs;
+}
+
 void SelectionResult::Merge(const SelectionResult& other)
 {
     m_target += other.m_target;