Returns the signature metadata envelope if the given verifier has signed this envelope, or undefined if no matching signature is found.
Handles both simple signatures and wrapped (double-signed) signatures with metadata.
EnvelopeError with code InvalidOuterSignatureType, UnverifiedInnerSignature, InvalidInnerSignatureType, InvalidSignatureType.
InvalidOuterSignatureType
UnverifiedInnerSignature
InvalidInnerSignatureType
InvalidSignatureType
Returns the signature metadata envelope if the given verifier has signed this envelope, or undefined if no matching signature is found.
Handles both simple signatures and wrapped (double-signed) signatures with metadata.