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

Construct a new block template and, for each outpoint corresponding to a transaction that did not make it into the block, calculate the cost of bumping those transactions (and their ancestors) to the minimum feerate. Returns a map from outpoint to bump fee, or an empty map if they cannot be calculated.

== Synopsis

Declared in `<node/mini_miner.h>`

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

== Return Value

A map from outpoint to required bump fee, or an empty map if it cannot be calculated.

== Parameters

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


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