pub fn extract_integrity_proof(
document: &Value,
now: i64,
) -> Option<(Map<String, Value>, Cryptosuite, String)>Expand description
Find a usable assertion-method integrity proof on document, if present,
and not expired at now, in seconds since the Unix epoch.
Returns the proof object, its cryptosuite, and its verificationMethod id.
The caller resolves that id to a key of the matching type and passes both
back to verify_object_integrity_proof. proof may be a single object or
an array (only the first usable one is returned; integrity_proofs has
them all).