[#GetBlockProof-03]
= GetBlockProof
:mrdocs:

Compute how much work a block header corresponds to.

== Synopsis

Declared in `<chain.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:arith_uint256.adoc[arith_uint256]
GetBlockProof(xref:CBlockHeader.adoc[CBlockHeader] const& header);
----

== Return Value

The expected number of hashes required to satisfy the header's target.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *header*
| The block header.
|===


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