[#node-MiniMiner-CalculateTotalBumpFees]
= xref:node.adoc[node]::xref:node/MiniMiner.adoc[MiniMiner]::CalculateTotalBumpFees
:relfileprefix: ../../
:mrdocs:

Construct a new block template and, calculate the cost of bumping all transactions that did not make it into the block to the target feerate. Returns the total bump fee, or std::nullopt if it cannot be calculated.

== Synopsis

Declared in `<node/mini_miner.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<CAmount>
CalculateTotalBumpFees(xref:CFeeRate.adoc[CFeeRate] const& target_feerate);
----

== Return Value

The total bump fee, or std::nullopt if it cannot be calculated.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *target_feerate*
| The feerate the bumped transactions should reach.
|===


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