[#SignatureCache]
= SignatureCache
:mrdocs:

Valid signature cache, to avoid doing expensive ECDSA signature checking twice for every transaction (once when accepted into memory pool, and again when accepted into the block chain)

== Synopsis

Declared in `<script/sigcache.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class SignatureCache;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:SignatureCache/2constructor-019.adoc[`SignatureCache`]         [.small]#[constructor]#
| Constructors
| xref:SignatureCache/operator_assign.adoc[`operator=`]  [.small]#[deleted]#
| Deleted copy assignment; the cache is non‐copyable.
| xref:SignatureCache/ComputeEntryECDSA.adoc[`ComputeEntryECDSA`] 
| Compute the cache entry for an ECDSA signature check.
| xref:SignatureCache/ComputeEntrySchnorr.adoc[`ComputeEntrySchnorr`] 
| Compute the cache entry for a Schnorr signature check.
| xref:SignatureCache/Get.adoc[`Get`] 
| Look up whether an entry is present, optionally erasing it.
| xref:SignatureCache/Set.adoc[`Set`] 
| Insert an entry, marking its signature as valid.
|===



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