Live ref

A live ref is an eventual ref into another vat — a reference to a remote object. Live refs last only as long as the two vats are running and in communication; they become broken refs afterward.

All live refs arrive either by being passed over another live ref (argument or return) or as the result of dereferencing a SturdyRef.

References to remote objects are either live refs, SturdyRefs, or not part of Pluribus.