blockchain reorg testing framework

[InoMurko]

I would like to be able to trigger random reorgs on private geth chains of N depth. I believe something like that could possibly be achieved with docker engine and https://github.com/alexei-led/pumba (or similar tool, that allows you to manipulate network and containers).

This was we are going to be able to validate our assumptions in designing childchain and provide proofs of whit-standing these attacks and glitches.

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linked: #31

[InoMurko]

blocks #45

[InoMurko]

More info and help: https://ethereum.stackexchange.com/questions/2851/how-can-i-reliably-induce-a-blockchain-fork-for-testing-purposes

[InoMurko]

https://github.com/drandreaskrueger/chainhammer
Chain hammer: This is a collection of python scripts that rapidly sends asynchronous transactions to an Ethereum node.

https://github.com/wolfcw/libfaketime
libfaketime: This library allows us to intercept system calls made within the containers and return values modified by the user. With this, we were able to simulate clock skew between the containers.

[InoMurko]

https://brave.com/mjolnir-tooling-for-bat-apollo/

[ayrat555]

@InoMurko Can we just use geth chain config which defines block numbers for hard forks?

{
  "config": {
    "chainId": <arbitrary positive integer>,
    "homesteadBlock": 0,
    "eip150Block": 0,
    "eip155Block": 0,
    "eip158Block": 0,
    "byzantiumBlock": 0,
    "constantinopleBlock": 0,
    "petersburgBlock": 0,
    "istanbulBlock": 0
  },
...

[InoMurko]

Hmm. This issue is specifically related to manually induce https://en.bitcoin.it/wiki/Chain_Reorganization

[boolafish]

some of my previous note talking with white block: https://omisego.atlassian.net/l/c/2ECjxSf6

[InoMurko]

This is cool. I would like to wait for @ayrat555 to review the task in detail, provide some feedback to us how difficult would this be to create on our own - since we would like to see this testable, we would need this continuously (in CI).

[ayrat555]

Currently, I'm trying to do the following:

1. Create private geth chain with 2 nodes with clique poa consensus
2. Disconnect nodes from each other using pumba
3. Submit the same transaction to both of them
4. Connect these nodes to each other again