Ethereum Classic Atlantis Hard Fork

This morning, Ethereum Classic successfully implemented the Atlantis hard fork at block height # 8,772,000. We would like to take this opportunity to highlight the significance of Atlantis. First, ETC is engaged in robust technical development and innovation. The fork is a major upgrade for the network and brings the Byzantium and Spurious Dragon upgrades from Ethereum to Ethereum Classic. It makes the blockchain more stable and secure. This is the first of several upgrades currently being built on ETC with developers and the community.


Second, Atlantis reflects genuine consensus. It is the result of collaboration with all stakeholders who had an opportunity to debate and analyze the impact of the hard fork, and who undertook the hard work of coming to agreement in a diverse and decentralized network.

Overall, the ETC network is stronger and more secure on both a technical and community level. We look forward to building on this strength in the weeks and months ahead.

Bob Summerwill, Ethereum Classic Cooperative
Terry Culver, Ethereum Classic Labs
Afri Schoedon, Developer and Hard Fork Coordinator

Bob Summerwill for Recruiters (2019)

What am I looking for:

  • Technical leadership, project management or community / developer relations role for a well-funded blockchain company.
  • Market-rate pay commensurate with my experience.
  • Happy and indeed keen to be public-facing.
  • Vancouver-based or remote-working.  This is not negotiable.

What I bring to the table:

  • 22 years of professional software development, the majority of which was on high-profile multi-million or billion-dollar projects customer-facing projects under strict time pressures.  20 AAA videogames shipped, across around 10 platforms.   Mainly technical leadership roles, on product teams, on central technology teams, studio level, EA Sports wide roles, worldwide roles.
  • 4 years of blockchain experience (Ethereum Foundation, ConsenSys, Enterprise Ethereum Alliance), including work on an Ethereum client (cpp-ethereum).
  • Experience working within a bank (TD Securities)
  • Enthusiasm and positivity which is very rare for somebody so senior, but married with suitable cynicism and risk awareness.
  • Real enjoyment of mentoring and leadership of more junior engineers
  • Unparalleled goodwill and broad connections across the blockchain ecosystem, both public and enterprise.
  • Community and ecosystem focus, which means that I can be very useful in building positive PR for the company and defusing trolls and haters.

  • Somewhere in the $150K-$200K USD ballpark
  • I expect to have some other advisories or sidelines, which will not be time-consuming.
  • I volunteer into the Ethereum community, EEA, Hyperledger, CryptoChicks, Canadian blockchain ecosystem.

More information on Bob:


Women of Hyperledger – How can I help you?

So today is the last day of Hyperledger TSC voting.  The polls close at 5pm Pacific today, with the results announced tomorrow.

There was a little Twitter activity around my observation on the diversity issues which we have in the TSC, and a new mail thread has been kicked off:

How can we improve diversity in the Hyperledger technical community?

I am a Community Ambassador for CryptoChicks and I care deeply about this topic and will do everything which I can to help promote a healthy and welcoming environment for women in the Hyperledger technical community.

Women of Hyperledger – How can I help you?   Please join that thread.

Hyperledger TSC candidates and thoughts on diversity

The candidates for the Hyperledger Technical Steering Committee (TSC) elections were announced today, together with everybody’s one page “pitches”, including my own:

Hyperledger Annual TSC Election Candidates (2018-2019)

There are 29 candidates for the 11 seats on the committee.  All of the incumbents are standing for re-election, together with 18 challengers, including myself.

The existing committee has the following composition:

  • Intel – Dan Middleton, Kelly Olson and Mic Bowman
  • IBM – Arnaud Le Hors and Chris Ferris (Chair)
  • State Street – Greg Haskins and Binh Nguyen (recently ex-IBM)
  • Other – Jonathan Levi (Hacera), Hart Montgomery (Fujitsu), Nathan George (Evernym), Baohua Yang (Oracle)

And here are the challengers:

  • Bitwise IO – Shawn Amundson
  • Blockchain Engineering Council – Claudio Lima
  • CME – Stanislav Liberman
  • Finterra – Mostafa S. Joo
  • Independent – Axe Tang, Clive Boulton, Sjir Njissen
  • Monax – Silas Davis
  • Ontario Provincial Government – Steve Boyd
  • Oracle – Todd Little
  • Quantfury – Bob Summerwill
  • Red Hat – Mark Wagner
  • SANLIAN Technology – Leon Liang
  • SecureKey – Troy Ronda
  • Soramitsu – Mukhutdinov Bualt, Nikolai Iushkevich
  • State Street – Srinivasan “Murali” Muralidharan
  • T-Mobile – Chris Spanton

I really enjoyed what Silas Davis and Mark Wagner had to say.  I worked with Silas on the Technology Working Group for the first few months of the Enterprise Ethereum Alliance and love what Monax have been doing to bridge the worlds.  This quote from Mark also really resonated with my own motivations for standing for election:

One of the reasons that I have chosen to run for the TSC is to provide more vendor diversity on the Committee as over half of the TSC is from two companies. My time is focused in the working groups and I am currently not associated with any of the projects. Thus I try to span all the projects with equal interest

– Mark Wagner

There most certainly is an overweight representation from IBM and Intel on the TSC at the moment, and I hope that we can come out of these elections with a more diverse balance of representatives.

On the topic of diversity, as a Community Ambassador for CryptoChicks, I have to say that I am sorely disappointed to note that not a single candidate for these elections is female.  The Hyperledger Governing Board has 21 members, only one of whom, Blythe Masters, the Chair, is female.


I spoke about CryptoChicks on Coindesk LIVE during Consensus 2018 in New York this year.  CryptoChicks are a non-profit blockchain educational hub with a mission to grow the professional and leadership potential of women in blockchain technology through education and mentorship.  I am delighted to do everything I can help in that noble mission.


Voting starts tomorrow and runs until August 22nd, with the results announced a week tomorrow on August 23rd.

Good luck, everyone!

Self-nomination for Hyperledger TSC

[Sent on August 9th 2018 in response to CALL FOR NOMINATIONS / Hyperledger / Annual TSC Election sent to eligible candidates]

My name is Bob Summerwill. I have been a professional software developer since 1996 with the majority of my career in the videogames industry, including 15+ years at Electronic Arts in various technical leadership roles on 20 AAA tiles, including a spell as Label Software Architect for EA Sports. I always found myself gravitating to collaboration projects of all stripes within EA. I later worked as a DevOps Solutions Architect at TD Securities in Toronto. I am currently Blockchain Lead for Quantfury, CTO at Varro Technologies, a community leader for the Ethereum Project and Community Ambassador for CryptoChicks, a Canadian non-profit organization working towards gender balance in blockchain.

I have been involved in blockchain since 2014 and have been an active participant in the Ethereum ecosystem in particular since 2015, working at the Ethereum Foundation, ConsenSys and the Enterprise Ethereum Alliance. I worked as a developer on the C++ Ethereum client at the Ethereum Foundation after several months in the community adding ARM Linux cross-build support to bring Ethereum to mobile Linux devices and smartwatches.

I spent 5 months in 2016 leading a failed attempt to relicense the C++ Ethereum client as Apache 2.0 so that the codebase could be contributed to Hyperledger. I have always been supportive of Hyperledger, recently speaking at the relaunch of the Hyperledger Vancouver Meetup. I have been participating in the Identity Working Group. I see Hyperledger as critical to the technology, providing an umbrella for open source development with a common IP and licensing policy and with the mature governance and collaboration project expertise of the the Linux Foundation standing behind the projects.

I was instrumental in the creation of the Enterprise Ethereum Alliance. As Co-Lead Architect I presented the Technical Roadmap at the launch event and later served first as Secretary of the Technical Working Group and later as Vice-Chair of the Technical Steering Committee. I have a very intimate understanding of the dynamics within enterprise blockchain, spanning both public blockchain and enterprise companies. I have spoken at dozens of Meetups and conferences on a large variety of topics in the last couple of years and am I very active on social media and in the community:

Here are some blog posts about my blockchain journey:

I have been working to build bridges across the blockchain ecosystem for many years, but I have unfinished business in building what I see is the most important bridge of all to help blockchain reach its full potential: The bridge to mainstream adoption. That is why I spent a year working on the Enterprise Ethereum Alliance and why I want to offer my service on the Hyperledger Technical Steering Committee.

This is not a zero sum game. Nobody has all the answers, but many of us are on parallel journeys and would be better served by sharing the road. What might have looked like hard lines in 2015/2016 are increasingly blurring and the line between public and private networks is blurring.

I believe I have both the technical background, personal character and blockchain consortium experience to bring people together on Hyperledger, to broaden engagement, and especially to bring together the Ethereum and Hyperledger communities to a degree which has proved elusive to this point.

Here is my conflict of interests statement:

Best wishes, and I thank you for your consideration!

– Bob

Building Bridges

I have never enjoyed zero sum thinking.

I am an eternal optimist and my view is that most humans are essentially good people.  Who wants wars, famine and conflict?   Surely it is better to collaborate where that makes sense, and not to sabotage each other where our goals are not aligned?

I have been told that I am too altruistic.  That I need to be a little more selfish.  And perhaps it is true, but that is something which is an effort for me.  It is a stretch from my default position, where I always seek to build a better future for humanity and for my children.

Integrity and transparency are really important to me.  I don’t want to wear a mask.  I don’t want there to be a business Bob and a personal Bob.   You get the same Bob whoever you are and whatever the context.  It is this one, here with my friend and fellow Vancouver blockchainer, Chelsea Palmer (AKA Ms Gnu) at Decentralized Web Summit last week:


Last November I started maintaining a Conflict of Interests Statement on my website, so everyone on the planet can know who I am and what my financial incentives are.  I want there to be no doubt whatsoever about the purity of my intentions.

Somebody asked why would I do this?  Was I running for office or something?  I replied:

Well here we are.  Nine months further on and I am running for office.

I am standing for election to the Hyperledger Technical Steering Committee (TSC) because I have unfinished business in building what I see is the most important bridge of all to help blockchain reach its full potential: The bridge to mainstream adoption.

800px-Golden_Gate_Bridge_Golden Gate Bridge in the Evening Sun (Creative Commons Attributed 3.0 Unported)

As I wrote more than two years ago in my Ethereum Everywhere blog post while I was attempting to bridge the Ethereum and Hyperledger communities for the first time:

Corporations will build blockchain technology irrespective of what we do.   It is already happening.

Just as both Intranets and the Internet have a role to play, so do public and private/consortium chains.    Maximalist thinking is not particularly helpful here.

The real world never works in black-and-white, and demonizing people with similar but not identical goals is self-defeating.

And I still love this quote:


So maybe the world was not ready for such a public <-> enterprise blockchain bridge in 2016, but I see a real shift in that thinking in the meantime.  Maximalism of all forms is melting away as more and more people realize that a one-size-fits all solution is very unlikely for blockchain.

There are use-cases where public permissionless chains make sense, where public permissioned chains make sense, where consortium chains make sense, where private chains make sense, where throughput trumps decentralization, where security is paramount over performance.   We need scaling on-chain, off-chain, with sidechains, child-chains, with sharding, with alternative consensus.   We need privacy features.   We need interchain solutions.   We need content-addressable storage solutions with incentive layers.  We need standard libraries, frameworks, debuggers, testing tools, better IDE integration, formal verification, and much more more.

Nobody has all the answers, but many of us are on parallel journeys and would be better served by sharing the road.

R3 are now building a public network and Richard Crook’s Cordite project is building enterprise tokens on Corda:

The Enterprise Ethereum Alliance which I helped to bring to life in early 2017 recently published the EEA Enterprise Ethereum Client Specification 1.0.

ConsenSys have announced that they will release a new Enterprise grade Ethereum client this October at DEVCON4:

IBM are experimenting with building a USD stablecoin on Stellar.   Their joint venture with Maersk will undoubtedly require some means of settlement as well. has popped into existence.  We had the latest phase of Project Ubin in Singapore not so long back.   IBM and ConsenSys’s work in Dubai aiming to migrate all government systems to blockchain by 2020 continues.  The owner of the NYSE is partnering with Microsoft and Starbucks on a Bitcoin exchange.

We are starting to make steps towards regulatory clarity.

We are not playing games anymore.  This is seriously impactful stuff.   What might have looked like hard lines between public and private and between different technology bases in 2015/2016 are rapidly blurring.

As John Wolpert said so well in his recent Bring on the Stateful Internet post:Screen Shot 2018-08-07 at 10.28.58 PM

There is no conflict here.  His conclusion is spot-on:

Screen Shot 2018-08-07 at 10.31.17 PM

This is the same perspective which I would bring to my work on the Hyperledger Technical Steering Committee.  This is not a zero sum game.  We need to work together across all of these technologies, and to have a neutral forum where we can all collaborate on the open source projects which underpin both commercial and non-commercial efforts.   Same as Linux.  Same as the web.

Say hello to the Hyperledger Greenhouse:

I have done lots of interviews and conferences in the last year or two and they are all up on my website if you would like to get more of a flavor of where I am coming from.

My door is always open to communication.   Here are all of the ways you can contact me, but I am most active on Twitter.

Have a great day!

Decentralized Web Summit 2018

I am flying back to Vancouver after a fantastic few days at Decentralized Web Summit 2018 in San Francisco. The list of attendees was stellar and the event itself did not disappoint. As has become usual for me, I saw close to zero of the sessions, and instead spent my time on face-to-face conversations with some of the most interesting and brilliant individuals on the planet. It is hard to express how grateful I am to have this opportunity. The life I have led since starting my journey down the blockchain rabbit hole in 2014 has been a delight.

IMG_20180731_160106With my good friend and fellow Vancouverite Chelsea Palmer, AKA Ms GNU.

With Mamie Rheingold, Alison Alexis and Chelsea Palmer.   Mamie is doing lots of the organization for the Ethereum DEVCON4 conference in Prague in Oct/Nov of this year.  Can’t wait for that.  It was lovely to meet her and spend some time together.   Chelsea has been assisting too, and was organizing Lightning Sessions at Decentralized Web Summit.

On the opening night, I got to chat with Alex Voto, Christian Lundkvist, Ron Patiro and Rouven Heck, all former colleagues at ConsenSys, many with degrees of involvement in the Enterprise Ethereum Alliance (EEA) as well, especially Alex.   So that was lovely.   The opening night was at the Internet Archive building, with Cory Doctorow interviewing Mike Judge, amongst other things.

With Tim Berners-Lee.  Such an delight to chat with him.  Legend.

The San Francisco Mint, where the two main days events were held is a beautiful brick and stone building, built in 1869.  Multiple rooms and vaults and a central courtyard.

Sunny Aggarwal on the move!   We had met in Vancouver in June too, for Dogecon.

With the inimitable Karl Floersch of Ethereum Research fame.   Check out his Cryptoeconomics blockchain course.  He makes things so accessible and fun.

I am running for election to the running for election to the Hyperledger Technical Steering Committee so it was great to grab some time with Brian Behlendorf (the Executive Director), Marta Piekarska (Director of Ecosystem) and Juan Benet (Protocol Labs, IPFS, FileCoin).   I had last seen Marta and Brian in New York in May for Consensus 2018.    I first met Brian in May 2016 while I was still at the Ethereum Foundation and was working towards relicensing of the cpp-ethereum so that we could have bridged these communities more than two years ago.   Maybe 2018 is when this can finally happen 🙂

Many people in blockchain are probably completely unaware of Anthony Donofrio (“Texture”) who was involved in the Ethereum Project almost from Day 1.   He is a philosopher and an amazing human being.   I love him to bits.

Aya Miyaguchi was appointed as the new Executive Director of the Ethereum Foundation in February of this year, but we had not managed to connect and have any face-to-face time since then.  It was lovely to have some time with her and Albert Ni and to give them a big brain-dump of my years worth of context into the EF and the broader Ethereum ecosystem.   They have a lot of work to do, but I am confident that the EF is in great hands.  Good luck, guys, and please don’t hesitate to call on me!

I first met Jay Carpenter of Desert Blockchain when I was down in Phoenix while working for Sweetbridge late last year and early this year.   We had a lot to catch up on.

On Wednesday night we got to have the long philosophy and psychology discussion with Texture which Alison had been waiting months for, with Chelsea and Michael Zargham also bringing their mighty brains to bear!   Michael is the founder of BlockScience, and our paths first crossed at Sweetbridge.  We got to spend a fair bit of time together in the last few days too, which was great.   I hope that our paths continue to cross.

This is Christopher Wray of Mattereum.  I have known Vinay Gupta from the interwebs for many years, and we worked together for a while on Sweetbridge recently, and I’ve been in contact with Rob Knight and Vinay WRT the EEA and Mattereum on several occasions in the last few months.   Great to meet Christopher too.   I had only seen him on videos until now.

Diana Stern is lots of fun.  She is a blockchain focused lawyer, now working for Baker and Hostetler, and we’ve been talking a lot over the last few months.   And Rick Dudley is an OG, who was around before Ethereum was “a thing”.   He’s a deep thinker, with real insight into mechanism design, complex systems, security and many other fields.   Check out his “What I don’t like about Ethereum” talk from the Ethereum Community Conference in March.  It is great.   He is the CEO of Vulcanize.

Christopher Allen is another OG, with decades of experience in open source, internet infrastructure, security, identity, decentralization and much much more.   Alison had been looking forward to talking to him for months, and it was indeed a real treat.

Jonathan Levi is the Founder of Hacera, and a member of the Hyperledger TSC.   We have been in contact on-and-off for several months online, and have seen each other IRL once or twice.   I hope that we can work together on Hyperledger soon enough.

Mike Slinn is a recent online acquaintance, and we grabbed an hour or so together to have a walk and talk and some food.   He’s been working with Scala for several years and has been getting to know Ethereum over the last little while.   He has a wealth of experience of previous paradigm shifts.  Great to meet you, Mike!

Aaron Davis (“kumavis”) is a MetaMask monster who I have known for at least 2 years.  What a team.  What a product.  Always great to catch up.

At the closing event we finally got to spend some time with Steven McKie, another renaissance man with brain-power to burn.   Here with Rick Dudley, Alison, myself, and Jamie Pitts of the Ethereum Foundation, who booted up the Ethereum Magicians and who Alison calls the Philosopher in Residence for Ethereum.   He missed out on the meal with Texture.   And Cassandra Shih, of the Ethereum Community Fund, who I met for the first time that night too.

And Chelsea closed out the evening with her fantastic raps, including the seminal “What happens on the Blockchain stays on the Blockchain”

What a blast!   See you all at Decentralized Web Summit 2020 🙂