inbox
The inbox of an account or a handle. Either resolves to the inbox the backend names only when the newest state of that inbox's own identity log holds it, and an old handle of an inbox still resolves to it. An account that resolves to no inbox gets the inbox ID it would create with nonce 0, but only when that inbox's log holds no update or still holds the account. A handle never derives an inbox ID. Any other lookup fails with IdentityNotFound.