[#IsWitnessStandard]
= IsWitnessStandard
:mrdocs:

Check if the transaction is over standard P2WSH resources limit: 3600bytes witnessScript size, 80bytes per witness stack element, 100 witness stack elements These limits are adequate for multisignatures up to n‐of‐100 using OP_CHECKSIG, OP_ADD, and OP_EQUAL.

== Synopsis

Declared in `<policy/policy.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
bool
IsWitnessStandard(
    xref:CTransaction.adoc[CTransaction] const& tx,
    xref:CCoinsViewCache.adoc[CCoinsViewCache] const& mapInputs);
----

== Description

Also enforce a maximum stack item size limit and no annexes for tapscript spends.

== Return Value

True if every witness stays within standard resource limits.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx*
| Transaction whose witness data is checked.
| *mapInputs*
| View providing the outputs spent by the transaction.
|===


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