[#Chainstate-ConnectBlock]
= xref:Chainstate.adoc[Chainstate]::ConnectBlock
:relfileprefix: ../
:mrdocs:

Apply the effects of a block to a given coins view, checking its validity.

== Synopsis

Declared in `<validation.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[requires_capability(0x7f2e1ba844e8), requires_capability(0x7f2e14564138), requires_capability(0x7f2e373bd2e8), requires_capability(0x7f2e36e33f38)]]
bool
ConnectBlock(
    xref:CBlock.adoc[CBlock] const& block,
    xref:BlockValidationState.adoc[BlockValidationState]& state,
    xref:CBlockIndex.adoc[CBlockIndex]* pindex,
    xref:CCoinsViewCache.adoc[CCoinsViewCache]& view,
    bool fJustCheck = false);
----

== Return Value

true if the block was connected successfully.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *block*
| The block to connect.
| *state*
| Validation state updated with the reason for any failure.
| *pindex*
| Block index entry corresponding to the block.
| *view*
| The coins view to apply the block to.
| *fJustCheck*
| When true, validate the block without committing the changes.
|===


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