pub fn verify_grounded(
credential: &Credential,
issuer_key: &VerifyingKey,
signature: &Signature,
now: u32,
index: &QuinIndex,
) -> Result<(), VcError>Expand description
Verify as verify, and additionally reject the credential if its issuer is an
ungrounded artificial agent in index (agency.n3 G1’ — no human Principal behind it).