The circuit the event is written into (the integrator's domain knowledge).
OptionalcontentDeclared content type. Default: text/plain for strings, application/json otherwise.
The item's DFID.
The field to seal (e.g. preco_venda).
OptionalincludeWrap for your own key too, so you never lose access to your own data. Default true; opt-out is explicit.
OptionaltoWho can open. Default: nobody but yourself (sealed-private).
The value — a string is sealed as text/plain, anything else as JSON.
OptionalvisibilityEvent visibility. Default private (safe default for sensitive data). public makes the
ENVELOPE (commitment, not the value) surface on the public /verify page.
Everything
sealneeds, in one object (issue #3:sealandopenshare the same shape style).