[#CheckProofOfWork]
= CheckProofOfWork
:mrdocs:

Check whether a block hash satisfies the proof‐of‐work requirement specified by nBits

== Synopsis

Declared in `<pow.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
CheckProofOfWork(
    xref:uint256.adoc[uint256] hash,
    unsigned int nBits,
    xref:Consensus/Params.adoc[Consensus::Params] const& params);
----

== Return Value

true if the hash meets the target specified by nBits.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *hash*
| The block hash to check.
| *nBits*
| The proof‐of‐work requirement in compact target form.
| *params*
| The consensus parameters for the active chain.
|===


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