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

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

== Synopsis

Declared in `<kernel/chainstatemanager_opts.h>`

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

== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:kernel/ChainstateManagerOpts/assumed_valid_block.adoc[`assumed_valid_block`] 
| If set, it will override the block hash whose ancestors we will assume to have valid scripts without checking them.
| xref:kernel/ChainstateManagerOpts/chainparams.adoc[`chainparams`] 
| Chain parameters governing consensus and validation.
| xref:kernel/ChainstateManagerOpts/check_block_index.adoc[`check_block_index`] 
| If set, run the block index sanity check at this frequency.
| xref:kernel/ChainstateManagerOpts/coins_db.adoc[`coins_db`] 
| Options for opening the coins (UTXO) database.
| xref:kernel/ChainstateManagerOpts/coins_view.adoc[`coins_view`] 
| Options for the in‐memory coins view cache.
| xref:kernel/ChainstateManagerOpts/datadir.adoc[`datadir`] 
| Data directory where chainstate and block files are stored.
| xref:kernel/ChainstateManagerOpts/max_tip_age.adoc[`max_tip_age`] 
| If the tip is older than this, the node is considered to be in initial block download.
| xref:kernel/ChainstateManagerOpts/minimum_chain_work.adoc[`minimum_chain_work`] 
| If set, it will override the minimum work we will assume exists on some valid chain.
| xref:kernel/ChainstateManagerOpts/notifications.adoc[`notifications`] 
| Sink for chainstate notifications.
| xref:kernel/ChainstateManagerOpts/prevoutfetch_threads_num.adoc[`prevoutfetch_threads_num`] 
| Number of worker threads used for prefetching block input prevouts. Zero means no parallel fetching.
| xref:kernel/ChainstateManagerOpts/script_execution_cache_bytes.adoc[`script_execution_cache_bytes`] 
| Size, in bytes, of the script execution result cache.
| xref:kernel/ChainstateManagerOpts/signals.adoc[`signals`] 
| Sink for validation event notifications, or null if unused.
| xref:kernel/ChainstateManagerOpts/signature_cache_bytes.adoc[`signature_cache_bytes`] 
| Size, in bytes, of the signature verification cache.
| xref:kernel/ChainstateManagerOpts/worker_threads_num.adoc[`worker_threads_num`] 
| Number of script check worker threads. Zero means no parallel verification.
|===



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