[#kernel-CBlockFileInfo]
= xref:kernel.adoc[kernel]::CBlockFileInfo
:relfileprefix: ../
:mrdocs:

On‐disk statistics describing the contents of one block file.

== Synopsis

Declared in `<node/blockstorage.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class CBlockFileInfo;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:kernel/CBlockFileInfo/2constructor.adoc[`CBlockFileInfo`]         [.small]#[constructor]#
| Construct an empty block‐file info with all counters zeroed.
| xref:kernel/CBlockFileInfo/AddBlock.adoc[`AddBlock`] 
| update statistics (does not update nSize)
| xref:kernel/CBlockFileInfo/ToString.adoc[`ToString`] 
| Return a human‐readable summary of the block‐file statistics.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:kernel/CBlockFileInfo/nBlocks.adoc[`nBlocks`] 
| number of blocks stored in file
| xref:kernel/CBlockFileInfo/nHeightFirst.adoc[`nHeightFirst`] 
| lowest height of block in file
| xref:kernel/CBlockFileInfo/nHeightLast.adoc[`nHeightLast`] 
| highest height of block in file
| xref:kernel/CBlockFileInfo/nSize.adoc[`nSize`] 
| number of used bytes of block file
| xref:kernel/CBlockFileInfo/nTimeFirst.adoc[`nTimeFirst`] 
| earliest time of block in file
| xref:kernel/CBlockFileInfo/nTimeLast.adoc[`nTimeLast`] 
| latest time of block in file
| xref:kernel/CBlockFileInfo/nUndoSize.adoc[`nUndoSize`] 
| number of used bytes in the undo file
|===



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