[#node-UNDO_DATA_DISK_OVERHEAD]
= xref:node.adoc[node]::UNDO_DATA_DISK_OVERHEAD
:relfileprefix: ../
:mrdocs:

Total overhead when writing undo data: header (8 bytes) plus checksum (32 bytes)

== Synopsis

Declared in `<node/blockstorage.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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inline constexpr uint32_t UNDO_DATA_DISK_OVERHEAD = {STORAGE_HEADER_BYTES + uint256::size()};
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