[#MemPoolFeeRateEstimator-EstimateFeeRate]
= xref:MemPoolFeeRateEstimator.adoc[MemPoolFeeRateEstimator]::EstimateFeeRate
:relfileprefix: ../
:mrdocs:

Estimates the fee rate for inclusion in the next block.

== Synopsis

Declared in `<policy/fees/mempool_estimator.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e403ca028), requires_capability(0x7f2e1404c788)]]
xref:util/Expected-0b.adoc[util::Expected<FeeRateEstimation, FeeRateEstimationError>]
EstimateFeeRate(bool conservative) const;
----

== Return Value

The estimated fee rate, or an error describing why estimation failed.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *conservative*
| When true, return the conservative (50th percentile) estimate; otherwise the economical (75th percentile) estimate.
|===


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