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

Maximum block weight, defaults to ‐maxblockweight

== Synopsis

Declared in `<node/mining_types.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<uint64_t> block_max_weight = {};
----

== Description

Must not be lower than block_reserved_weight. Setting this equal to block_reserved_weight leaves no room for non‐coinbase transactions.


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