How to change the consensus algorithm in ethereum from PoW to PBFT?

Question

https://github.com/ethereum/wiki/wiki/Consortium-Chain-Development

I would like to use PBFT as the consensus mechanism in my locally deployed ethereum network.

as the document specified above, we can use PoA, PBFT, DPoS consensus algorithm in private or consortium ethereum blockchain. Anybody have any clue about how to implement it?

Any suggestions would be appreciated.

Answer 1

Parity supports the Tendermint consensus engine (experimental). You can use it to run a private PBFT-based network, i.e., by adding the following to your chain configuration:

"engine": {
    "tendermint": {
        "params": {
            "gasLimitBoundDivisor": "0x400",
            "validators" : {
                "list": [
                    "0x37f93cfe411fa244b87ff257085ee360fca245e8",
                    "0x610a3a37b98bf0c91c35442e489c246096739324"
                ]
            }
        }
    }
}

"gasLimitBoundDivisor" determines how fast the gas limit should adjust, most of the time 0x400 is fine "validators" is the list of addresses of the entities which will be allowed to issue blocks Optional: "blockReward" determines the reward given to issuing authority "timeoutPropose" "timeoutPrevote" "timeoutPrecommit" "timeoutCommit" "registrar" address of a contract containing registry, used for UI

"seal": {
    "tendermint": {
        "round": "0x0",
        "proposal": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
        "precommits": [
            "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000"
        ]
    }
}

The genesis seal should not be changed unless a hard fork is conducted.

Disclosure, I work for Parity.