[#wallet-SelectCoinsBnB]
= xref:wallet.adoc[wallet]::SelectCoinsBnB
:relfileprefix: ../
:mrdocs:

Select coins using the Branch and Bound algorithm to find a changeless solution.

== Synopsis

Declared in `<wallet/coinselection.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:util/Result.adoc[util::Result<SelectionResult>]
SelectCoinsBnB(
    std::vector<OutputGroup>& utxo_pool,
    xref:CAmount.adoc[CAmount] const& selection_target,
    xref:CAmount.adoc[CAmount] const& cost_of_change,
    int max_selection_weight);
----

== Return Value

If successful, a valid SelectionResult, otherwise util::Error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *utxo_pool*
| The output groups eligible for selection.
| *selection_target*
| The target value to select for.
| *cost_of_change*
| The cost of creating and later spending a change output.
| *max_selection_weight*
| The maximum allowed weight for a valid selection.
|===


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