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

An options struct for `BlockManager`, more ergonomically referred to as `BlockManager::Options` due to the using‐declaration in `BlockManager`.

== Synopsis

Declared in `<kernel/blockmanager_opts.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct BlockManagerOpts;
----

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:kernel/BlockManagerOpts/block_tree_db_params.adoc[`block_tree_db_params`] 
| Parameters for opening the block tree database.
| xref:kernel/BlockManagerOpts/blocks_dir.adoc[`blocks_dir`] 
| Directory that holds the block and undo files.
| xref:kernel/BlockManagerOpts/chainparams.adoc[`chainparams`] 
| Chain parameters governing the block storage.
| xref:kernel/BlockManagerOpts/fast_prune.adoc[`fast_prune`] 
| Whether to prune aggressively, mainly for testing.
| xref:kernel/BlockManagerOpts/notifications.adoc[`notifications`] 
| Sink for block storage notifications.
| xref:kernel/BlockManagerOpts/prune_target.adoc[`prune_target`] 
| Target size, in bytes, to prune the block files down to (0 disables pruning).
| xref:kernel/BlockManagerOpts/use_xor.adoc[`use_xor`] 
| Whether to obfuscate (XOR) block files on disk.
|===



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