[#btck_chainstate_manager_options_create]
= btck_chainstate_manager_options_create
:mrdocs:

Create options for the chainstate manager.

== Synopsis

Declared in `<kernel/bitcoinkernel.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[nodiscard, __nonnull__]]
xref:btck_ChainstateManagerOptions-08.adoc[btck_ChainstateManagerOptions]*
btck_chainstate_manager_options_create(
    xref:btck_Context-07.adoc[btck_Context] const* context,
    char const* data_directory,
    size_t data_directory_len,
    char const* blocks_directory,
    size_t blocks_directory_len);
----

== Return Value

The allocated chainstate manager options, or null on error (e.g. if a path is invalid).

[NOTE]
====
The return value https://en.cppreference.com/cpp/language/attributes/nodiscard[should not be discarded^].
====
== Parameters

[cols="1,4"]
|===
| Name| Description
| *context* [in]
| Non‐null, the created options and through it the chainstate manager will associate with this kernel context for the duration of their lifetimes.
| *data_directory* [in]
| Path string of the directory containing the chainstate data. If the directory does not exist yet, it will be created.
| *blocks_directory* [in]
| Path string of the directory containing the block data. If the directory does not exist yet, it will be created.
| *data_directory_len* [in]
| Length in bytes of `data_directory` (not including a trailing NUL).
| *blocks_directory_len* [in]
| Length in bytes of `blocks_directory` (not including a trailing NUL).
|===


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