– JEFF GARZIK, Metronome Chief Designer – via Medium
Portability empowers MET owners to choose the chain where they hold their MET for whatever reason they desire, such as security, fee optimization, and governance arbitrage.
Currently, MET can be ported between Ethereum and Ethereum Classic. Additional chain support is under research and development.
The Validator Network ensures the global supply of Metronome is not violated when chainhopping. There are three phases of Validator network rollout, each phase is increasingly decentralized:
In Phase 1, federated network of validators operates in a multi-signature, multi-party approach to validate import/export transactions. MET owners may export at any time. For import, a quorum of validators approves a set of import transactions submitted by users. Initially, there are five validators: ETC Labs, the QTUM Team, Bloq, Inc., Veriblock, and Spacechain.
In the event of a chain fork, the quorum of validators will choose which side of a fork is The Real Metronome.
Phase 2 will decentralize and rely less on validators. For each blockchain, Metronome will look to chain oracles that provide a very specific piece of data: What is the correct chain for a particular currency?
The goal is to automate the choosing of hard fork sides, automatically ingesting and following the community choice for each blockchain.
Phase 3 of cross-chain validation provides a fully decentralized end state. The model mirrors that of the original Bitcoin blockchain. This is possibly the first cross-blockchain blockchain. Each lily pad — each set of smart contracts — uses a Bitcoin-style consensus protocol, with Proof-of-Stake modification to determine the outcome of hard forks. This consensus protocol automatically chooses one side of a hard fork over another.