[Shipped] A Multi-View Solution for PBFT Protocol

[thaibao]

Hi @team

I’m working to review 2nd for multiview on pull request 880(after your team merged portal v2 for a final pull request). And I have some trouble with ChainInterface. I know that we have blsbft for fixed node version and blsbftv2 for non-fixed node version. So we have 2 interface here
blsbft

blsbftv2

But, the fact that I also have a ChainInterface in consensus folder, for What?

This is no need for our design, right?

[thaibao]

And by the way, in case we only use ChainInterface of blsbft folder. So, where is function GetPubkeyRole

In my memory, I remember this function is used for some function of pNode of app team for checking staking node. If this function is removed, you guys checked to related feature on RPC, right?

[ruler]

ChainInterface in consensus/interface.go is no longer is used, @0xkumi plz confirm this

[thaibao]

Hi @team,

We complete reivew PR 880. Tomorrow, we will deploy this on testnet

Congratulation!

[0xkumi]

Weekly update 25 April - 1 May (in milestone “Run multiview for consensus v1 on testnet”)

• We are ready to launch multiview on testnet this week, however, there is a delay due to holiday time.
• In May, the team will work on the next milestone which we allow to round-robin the proposer (consensus v2). One step closer to decentralize our network.
• Regard to team resource, @dungtran and @lam will not join in next phase as they will research on another topic.

[thaibao]

I’m running some validator node with this multiview solution by docker tag consensus_multiview_20200504_1 on testnet. Because we have some change in state of beacon and shard, this version should sync testnet data again. When these node is ready for consensus, I will deploy for all testnet node. Hope these will be synced full data of testnet on tomorrow and we can do that on tomorrow afternoon

Thanks

[thaibao]

Hi @0xkumi @hungngo and team,
I tried to run a node with multiview and realized that it did not sync the data of shard 2, although this node is a validator of shard 2.

Please look into this issue.

Thanks

[thaibao]

Hi @0xkumi and team

We have an issue with portal V2, can not sync data, so we will delay deploy consensus-v2 -multiview on testnet and run an old version with portal v2 and sync from scratch again with code of portal v2 to make sure this is not an issue of your team.

I will notice later.

Thanks

[thaibao]

Hi @team, with your consensus-v2 multiview, I can sync data of testnet. But we have a new issue that validator can not join consensus and send vote, it only receive other vote

Please look over this issue and fix it

Thanks

[0xkumi]

Thank you @thaibao we have issue with new database layout. And already fixed it.

Weekly update 2 May - 8 May (in milestone “Run multiview for consensus v2 on testnet”)

• This week, we have some issues of multiview protocol related to database and fork logic. They all fixed and we are re-run on testnet.
• QC team also start to test consensus v2 which allows round-robin proposer.
• The fork case simulation tool also finish this week.

Next week, we will focus on testing consensus v2 code and run simulation cases.

[thaibao]

@0xkumi

This week, we have some issues of multiview protocol related to database and fork logic. They all fixed and we are re-run on testnet.

The fact is, I could run your latest code on 1 node of each shard in the testnet. It synced perfectly and joined consensus. But this is only one node in a shard. We need to replace all nodes in testnet with this code and unfortunately, we have some issues around portal v2 which I noticed. We need to:

• Try syncing a fullnode in testnet with fully verified block
• Wait for portal v2 bugs to be fix and replace all nodes in testnet

Thanks.

[thaibao]

We have an issue with deposit token on testnet when I test by changing beacons with 1/3 node is multiview. Beacon can not create block with deposit token bridge

That means
1/ beacon 0(old code) create block with deposit tx
2/ beacon 1(old code) verify that ok and send vote
3/ beacon 3(multiview code) verify fail

-> Block can not be created.

Please look into this issue.

[annie]

Hey @0xkumi, for the April work, your project got 3/5 votes, resulting in a 50% funding released. PRV should have arrived at your wallet by now. Please kindly check!

Great month ahead!!

[0xkumi]

Update (in milestone “Run multiview for consensus v2 on testnet”)

• This week, we didnot develop consensus v2 anymore, but focus on fix bug reported from QC team.
• We also started to simulate some fork scenarios in local machine.
• From this week, team will focus on making the network more robust and reliable, which will be shown in another thread.

[thaibao]

For a good early publishment this feature on mainnet and prepare better for multiview bft-2 solution (with round robind block proposor). We have plan publish multiview with engine bft-1(still fix block proposor) in this July on mainnet.

About multiview bft-2, we’re working in new proposal Improve Node Performance