Verifies one statement, its signature before any claim is believed.
the statement JWT
base, the address the request arrived on
base
a promise of { ok: true, trusted, issuer, issuerKind, publisher, metadata, ... }, or a refusal carrying error, description and errorCode
{ ok: true, trusted, issuer, issuerKind, publisher, metadata, ... }
error
description
errorCode
Verifies one statement, its signature before any claim is believed.