Skip to content
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
167 lines (156 sloc) 8.56 KB

Ethereum Core Devs Meeting 48 Notes

Meeting Date/Time: Fri, October 12, 2018 14:00 UTC

Meeting Duration: 1.5 hours

GitHub Agenda Page

Audio/Video of the meeting


  1. Testing
  2. Client Updates
  3. Research Updates
  4. Constantinople
  5. ProgPoW

Call starts at [5:33]

Testing update

  • Martin update
    • Tests not yet stabilized, still activity in generating the tests
    • Earlier today we found a consensus issue in the cpp-ethereum engine, this has been fixed, waiting for tests to be regenerated
    • Can't speak to coverage of tests
  • Dimitry update
    • Getting reports of failing tests from different developers, we are fixing these issues, tests already regenerated and merged
    • Hope we find all consensus issues during this test period
    • But extcodehash tests and some around storage, blockchain transition tests still in dev
    • Difficulty formula tests merged in past week, see basictests/difficulty-constantinople-json
  • Martin: Fuzz testing framework running for a couple of weeks, has run millions of tests, some false positives, found one consensus issue but it cannot be triggered on mainnet since it's due to behavior of non-existing precompiles
  • Hudson: Have you been getting help with testing or do you still need help?
    • D: No help developing tests in JSON format, Jared helped a bit

Client updates

  • Parity (Afri)
    • Did Constantinople releases today: 2.0.7, 2.1.2
    • Prepared for Ropsten, Kovan HF
  • Geth (Peter)
    • We did a release Monday or Tuesday which enabled all EIPs for Ropsten HF
  • Trinity (Piper)
    • Working on sync performance, getting sync time down to a reasonable level
    • Have made a lot of progress but still a lot left to do
  • EthereumJ (Dmitrii)
    • Published release just now, Constantinople on Ropsten
    • Not passing all tests, I hope no consensus issues
  • Aleth (Pawel)
    • Released v1.4, stable for some time
    • Mostly an effort to have stable releases from time to time
    • Not fully Constantinople-compatible
    • But master branch is and we have one node running cpp on Ropsten
    • Switched to parity's network monitor, so it should be on the list
    • This is the only node that will participate in the Ropsten HF
  • Nimbus (Jacek)
    • Continuing to work on sync and getting general state tests to pass, making steady progress
    • ETH2 beacon chain, work being done on test format, if you're interested, check beaconchain project on ethereum, there are open issues
    • Looking into platforms, making sure we can compile on ARM and others
  • Pantheon (Meredith)
    • Implemented all Constantinople EIPs
  • TurboGeth (not present)
  • EthereumJS (not present, left comment)
    • Making good progress, have substantial parts of all EIPs implemented
    • Merging SSTORE implementation
    • Confident we can do Constantinople ready release of VM within 1-2 weeks
  • Mana (Andrew)
    • Updated all EIPs, working on syncing Ropsten, began last week, at around block 300k
    • Mainnet, we are at 1.7M
  • Nethermind (not present)
  • Exthereum (not present)
  • Ewasm
    • Lane
      • Lots of work on benchmarking, will report results at some point
      • Testnet running and mostly stable, will launch publicly at DevCon
      • Working on documentation
    • Pawel
      • Close to release EVMC v6, need to update go bindings
      • Don't want to modify more for next month
  • Hudson: Every client is totally Constantinople-compatible
    • Except: Trinity, ethereumJS, exthereum
    • All major clients have updated CREATE2 specs

Research updates

  • Danny update
    • Justin working on VDF feasibility study, effort to create strong, unbiasable randomness
    • Filecoin has agreed to split the cost of the next chunk of the feasibility study which involves circuit design, they are interested in it for the same reason
    • Within next couple months we'll hopefully have an idea if this is going to work for the random beacon
    • Randao serves our purposes for most uses, will likely move fwd with this and can add VDF as hardening in future
    • Been cleaning up, expanding ETH 2.0 spec, lots of development going on
    • You guys all have lots of valuable insights to add to this process
    • There is an ETH2.0 specs repo, eth2.0-pm, please take a look, don't hesitate to reach out to me to talk about what's going on and where you can get involved

Constantinople, Ropsten HF

  • Progress tracker
  • Hudson
    • Ropsten HF will happen around Sunday or Monday
    • We'll have folks online
    • If anything bad happens we'll get together
    • Mainnet HF will happen after DevCon
    • In about two weeks, first folks will be arriving in Prague for DevCon, should we skip the next meeting?
    • (No complaints, consensus achieved, we'll do the next meeting in four weeks)
  • Martin
    • Everything is implemented in all clients
    • If we find no consensus errors in testing or on the testnet, when should we aim to do the HF?
  • Afri: mid-November might be a bit rushed
    • Maybe end of November?
  • Piper: second end of November
  • Hudson: How much time do we need after setting the block number, before the fork?
    • About a month
    • When should we decide the block number?
  • Piper: Can announce it outside of this call, confirm on 11/9 call
  • Afri: Should we have a quick call in ~one week, just evaluate the fork on Ropsten, see if it's going well, announce a preliminary block number
    • If something goes wrong, we can put it on hold until January
  • Martin: How do we avoid the fiasco of the last HF?
  • Peter: We discussed at the last DevCon, whether we need a bailout mechanism for the HF
  • Piper: Let's take this offline and see if we can settle on something before the meeting next Friday
  • Hudson: Having a smart contract that the clients can ping to see if the fork is still on - is this the idea?
  • Dimitry: Clone existing mainnet, where every client repeats existing mainnet tx as if already running on Constantinople
  • Martin: We could do it but no one would be using many of the changes, bomb delay not noticable, etc., would be useful to see gas changes
  • Afri: Check out, WS secret same as ethstats


  • Martin: Andrei, Pawel and I have been in touch w ProgPoW folks

    • Have ironed out some kinks
    • Some problems with the EIP
  • Pawel: Some big gaps in EIP spec

    • Practically impossible to implement it based on the EIP itself
    • Had to reach out for source code mostly done by ProgPoW team
    • Final version found somewhere in one of the implementations, we discussed the differences
    • C++/Go implementation on the same page
    • EIP is in bad shape
    • There are some very small improvements we can make
    • Most important part is we have two reference implementations but no proper spec
    • I don't like this situation as I don't want people to have to read the C or Go code to figure out how to implement it
    • The team did some work on improving EIP and answering questions but not so much in public
    • We are in touch with them, we can ask them questions directly and usually get some answers
    • This helped me finish implementation that produced same results - just yesterday
  • Martin

    • Some changes need to be made, the original idea is that it has internal epoch of 50 blocks
    • When translated into ethereum it uses the same epoch as ethash which is 30k blocks, which leads to some problems
    • Needs an update of protocols between the miners, the getwork function
    • Other than that, the general idea is to launch a testnet for it ASAP
  • Hudson: So we want the EIP updated to include more detail

    • Have we communicated this to them?
    • Pawel: Yes. As of today they still plan to update the EIP with what we discussed privately, to fill the gaps.
  • Hudson

    • Skipping next call
    • Constantinople special call in a week
    • Won't shift overall meeting schedule


  • Meredith Baxter (ConsenSys/PegaSys/Pantheon)
  • Paweł Bylica (EF/aleth)
  • Jason Carver (EF/python/trinity)
  • Dmitry (Harmony)
  • Daniel Ellison (ConsenSys/LLL)
  • Matthew English (ConsenSys/PegaSys)
  • Andrew Gross (Mana)
  • Fredrik Harrysson (Parity)
  • Hudson Jameson (EF)
  • Mikhail Kalinin (EF/EthereumJ)
  • Eric Kellstrand (ConsenSys/PegaSys)
  • Dimitry Khokhlov (EF/testing)
  • Piper Merriam (EF/python/trinity)
  • Lane Rettig (Ewasm)
  • Danny Ryan (EF/research)
  • Afri Schoeden (Parity)
  • Jacek Sieka (Status/Nimbus)
  • Martin Holst Swende (EF/geth/security)
  • Péter Szilágyi (EF/geth)
You can’t perform that action at this time.