[#GenericTransactionSignatureChecker-03]
= GenericTransactionSignatureChecker
:mrdocs:

Signature checker that validates against a concrete spending transaction.

== Synopsis

Declared in `<script/interpreter.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template<class T>
class GenericTransactionSignatureChecker
    : public xref:BaseSignatureChecker.adoc[BaseSignatureChecker]
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `xref:BaseSignatureChecker.adoc[BaseSignatureChecker]`
| Interface for verifying signatures and time locks encountered during script evaluation.
|===

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:GenericTransactionSignatureChecker-03/2constructor-0a.adoc[`GenericTransactionSignatureChecker`]         [.small]#[constructor]#
| Constructors
| xref:GenericTransactionSignatureChecker-03/CheckECDSASignature.adoc[`CheckECDSASignature`]  [.small]#[virtual]#
| Verify an ECDSA signature for this transaction's input.
| xref:GenericTransactionSignatureChecker-03/CheckLockTime.adoc[`CheckLockTime`]  [.small]#[virtual]#
| Check an absolute lock time against this transaction's input.
| xref:GenericTransactionSignatureChecker-03/CheckSchnorrSignature.adoc[`CheckSchnorrSignature`]  [.small]#[virtual]#
| Verify a Schnorr signature for this transaction's input.
| xref:GenericTransactionSignatureChecker-03/CheckSequence.adoc[`CheckSequence`]  [.small]#[virtual]#
| Check a relative lock time against this transaction's input.
|===


== Protected Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:GenericTransactionSignatureChecker-03/VerifyECDSASignature.adoc[`VerifyECDSASignature`]  [.small]#[virtual]#
| Verify a raw ECDSA signature against a public key and precomputed sighash.
| xref:GenericTransactionSignatureChecker-03/VerifySchnorrSignature.adoc[`VerifySchnorrSignature`]  [.small]#[virtual]#
| Verify a raw Schnorr signature against an x‐only public key and precomputed sighash.
|===


== Template Parameters

[cols="1,4"]
|===
| Name| Description
| *T*
| The transaction type (CTransaction or CMutableTransaction).
|===


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