@endo/errors

When host and guest programs share a JavaScript context, there is some risk that the guest will call a host function and induce it to throw an exception that inadvertently reveals information about its internal state to the guest. It is similarly possible that a guest would inadvertently reveal information to a cotenant guest.

For this reason, the @endo/errors package provides utilities for constructing errors with redacted messages. In coordination with ses in the host realm, the information redacted by these utilities will be revealed to the realm's console for use in debugging, but be invisible to code that catches them.