https://github.com/commerceblock/mercurylayer/blob/testnet_guide/docs/testnet_guide.md

Instructions for experimenting with Mercury Layer on testnet.

Mercury Layer is an implementation of the statechains concept in which the server is fully blind and doesn't even have to know it is doing anything related to Bitcoin. All it does is generate keys, sign things and delete keys.

An amazing technology that works today but could be made 10x better with APO.