Waves Platform

In the NG model, the next miner is selected in advance. The miner creates a ‘key block’, which is then immediately filled with microblocks containing transactions, which requires no further proof-of-work. Whilst maintaining the open structure of the protocol, this allows transactions to be confirmed as fast as the network will allow. Waves’ proof-of-stake approach further improves speed, increasing capacity by a factor of a hundred or more.

‏Source waves-ng.wavesplatform.com