Resolves an entity to one of the given Trust Anchors (the realm's when none), from the cache while the chain lives, otherwise by walking.
the request
the entity's Entity Identifier
the Trust Anchors to resolve to
whether the walk may fetch from other entities
a promise of { ok, resolved, marks, anchor }, or of a refusal in section 8.9's vocabulary
{ ok, resolved, marks, anchor }
Resolves an entity to one of the given Trust Anchors (the realm's when none), from the cache while the chain lives, otherwise by walking.