Community realm. Read the code first. Community realm, deployed by its author. Read the code before you interact or send coins.
Package impl is version 0 of the implementation realm of the "self-registering implementation" upgrade pattern (pattern E; see ../../README.md).
Deploying this realm is the whole upgrade: init registers it with the facade.
Instance exposes the singleton so a test (or a rollback) can re-register it without redeploying.
gnokey query vm/qeval -remote "https://rpc.onyx.testnets.gno.land" -data "gno.land/r/nym-moultest123/x/upgrade/selfreg/impl/v0.Instance()"