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consensus/istanbul: Istanbul BFT (EIP650) #14674

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yutelin
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@yutelin yutelin commented Jun 22, 2017

This PR is the implementation of Istanbul BFT protocol in ethereum/EIPs#650

@fjl fjl changed the title Istanbul Byzantine Fault Tolerance consensus/istanbul: Istanbul Byzantine Fault Tolerance (EIP650) Jun 22, 2017
@fjl fjl changed the title consensus/istanbul: Istanbul Byzantine Fault Tolerance (EIP650) consensus/istanbul: Istanbul BFT (EIP650) Jun 22, 2017
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fjl commented Jun 22, 2017

Warning: it will take a while to get this merged ;)

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GitCop commented Aug 31, 2017

Thank you for your contribution! Your commits seem to not adhere to the repository coding standards

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@stevenroose
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--istanbul.blockpausetime value Pause time when zero tx in previous block, values should be larger than istanbul.blockperiod (default: 2)
I guess it's a good idea to fail when that is not the case :)

}
}

/**
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Forgotten comment?

@kesar
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kesar commented Dec 14, 2017

could conflicts be solved? I would love to use this algo!

@stevenroose
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-- repost of comment on EIP 650 --

The current implementation (as found in Quorum) breaks the concept of the "pending" block, used in several calls, but most notably in eth_getTransactionCount (PendingNonceAt in ethclient):

In Ethereum, the pending block means the latest confirmed block + all pending transactions the node is aware of. This means that directly after a transaction is sent to the node (through RPC), the transaction count (aka nonce) in the "pending" block is increased. A lot of tools, like abigen in this repo or any other tool where tx signing occurs at the application level instead of in geth, rely on this for making multiple transactions at once. After the first one, the result of eth_getTransactionCount will increase so that a valid second tx can be crafted.

With the current implementation of Istanbul, the definition of the "pending block" seem to be different. When submitting a transaction, the result for eth_getTransactionCount for the sender in the "pending" block does not change. When a new block is confirmed (not containing this tx), it does change however (while the value for "latest" doesn't). Then, on the next block confirmation, the "latest" also changes because the tx is in the confirmed block.

So this seems to mean that the "pending block" definition changed from "latest block + pending txs" to "the block that is currently being voted on". I consider this a bug; if this is done on purpose, it breaks with a lot of existing applications (all users of abigen, f.e.) and should be reconsidered.

I originally reported about this issue in the Quorum repo, but there doesn't seem to be a good place to report bugs in Istanbul other than here.

Protocol() Protocol
}

// Handler should be implemented is the consensus needs to handle and send peer's message
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Isn't it "if the consensus" instead of "is the consensus" ?

LastProposal() (Proposal, common.Address)

// HasPropsal checks if the combination of the given hash and height matches any existing blocks
HasPropsal(hash common.Hash, number *big.Int) bool
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I would change it to HasProposal to keep it consistent with the rest

)

const (
// fetcherID is the ID indicates the block is from Istanbul engine
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I would say "fetcher ID indicates that the block..."


// ----------------------------------------------------------------------------

type backend struct {
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I would rather get rid of the // --------------------- comment line and move the struct before the New function (which would make sense because we use the backend struct in the New function) for clarity/cleanliness.

return nil
}

// Broadcast implements istanbul.Backend.Gossip
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Isn't is Gossip, rather than Broadcast ?

if err == nil {
backlog.Push(msg, toPriority(msg.Code, p.View))
}
// for msgRoundChange, msgPrepare and msgCommit cases
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Indentation problem, or is this expected ?

return nil
}

// ----------------------------------------------------------------------------
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I would remove this comment

}
}

// ----------------------------------------------------------------------------
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Useless comment ?

return ms.messages[addr]
}

// ----------------------------------------------------------------------------
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Useless comment ?

}

// roundState stores the consensus state
type roundState struct {
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I would move this struct just before the newRoundState function

@kaidiren
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cool, please go ahead

@adamschmideg
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We don't have the capacity to merge and maintain it. We had an informal chat with Quorum, and they might write the integration.

@osouza-de
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Is there any update regarding the integration?

@jpmsam
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jpmsam commented Feb 18, 2019

It is integrated in Quorum which is a fork of Geth.

@osouza-de
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osouza-de commented Feb 18, 2019

It is integrated in Quorum which is a fork of Geth.

Yes, I'm aware of it.
But I mean when it's going to be merged into Ethereum geth official repository.

As we can see in the comment:

We don't have the capacity to merge and maintain it. We had an informal chat with Quorum, and they might write the integration.

}

for _, seal := range committedSeals {
if len(seal) != types.IstanbulExtraSeal {
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Could someone tell me what this checks? I was trying to figure out where we check during the commit/finalization that the commit seals are valid?

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stale bot commented Mar 1, 2020

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

@itsdevbear
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wen merge >:(

@karalabe
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karalabe commented Dec 2, 2021

never

@zhiqiangxu
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never

@karalabe Is there an official reason for this?

@sarthaktNt
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Polygon Edge migration from POA to POS

I have created a 4 nodes POA network using polygon-edge.
As mentioned ,I have tried out the approach for migration.

I have deployed the staking smart contract in block no 59357 .All the validators staking has staked before block no 59750.I have verified the list in staking contract.
I have restarted all the nodes after migration to rebuild the blocks from new genesis.json.
polygon-edge ibft switch --chain ./genesis.json --type PoS --deployment 59357 --from 59750
But the blocks are not getting generated from 59750 due to the following error.

failed to get validators when calculation quorum

Please guys help me to resolve my issue

@karalabe
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This is a repo for Ethereum, not Polygon.

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