[#CoinsViewOverlay-2constructor]
= xref:CoinsViewOverlay.adoc[CoinsViewOverlay]::CoinsViewOverlay
:relfileprefix: ../
:mrdocs:

Construct an overlay that fetches block input prevouts in parallel.

== Synopsis

Declared in `<coins.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
CoinsViewOverlay(
    xref:CCoinsView.adoc[CCoinsView]* in_base,
    std::shared_ptr<ThreadPool> thread_pool,
    bool deterministic = false) noexcept;
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *in_base*
| Non‐null base view this overlay reads through to.
| *thread_pool*
| Non‐null thread pool used to fetch inputs in parallel.
| *deterministic*
| When true, seed the hasher deterministically (for testing).
|===


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