[#PSBTInput-sha256_preimages]
= xref:PSBTInput.adoc[PSBTInput]::sha256&lowbar;preimages
:relfileprefix: ../
:mrdocs:

SHA256 preimages keyed by their hash&period;

== Synopsis

Declared in `&lt;psbt&period;h&gt;`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
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std::map&lt;uint256, std::vector&lt;unsigned char&gt;&gt; sha256&lowbar;preimages;
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