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UN-pluggable Consensus With Hyperledger Sawtooth

By | Blog, Hyperledger Sawtooth

We have an exciting technical update to share! Hyperledger Sawtooth now supports un-pluggable consensus. That means you can easily change all blockchain settings by submitting a transaction to the network – including changing the consensus algorithm on the fly. This transition happens, like all state, at the block boundary.

When we designed our 0.8 architecture this year a big part of it was putting all blockchain configuration on the chain itself. That includes the selection of consensus algorithm.

The benefit is you can start a network with a small-scale or lax byzantine consensus algorithm and change as your network grows. And that change does not require you to stop all validators, flush your state, and start over with a new genesis block. There’s no outage at all involved in changing consensus. Coordination among peers to change consensus is implicit with this being a blockchain transaction.

In our 0.8 stable builds you can submit transactions to change between DevMode, PoET, and PoET-SGX. The initial development to add Raft is underway. We anticipate adding full support for Raft after we get Hyperledger Sawtooth 1.0 release completed this year.

For more information, you can review this presentation:

If you’re interested, you can learn more about Hyperledger Sawtooth and see real world examples of how the technology is being used. You can also read the documentation, join the community on RocketChat or pull the code from GitHub to kick the tires today.


Developer Showcase Series: Chris Kowalski, Blockchain Tech Labs

By | Blog

Our Developer Showcase blog series serves to highlight the work and motivations of developers, users and researchers collaborating on Hyperledger’s incubated projects. Next up is Chris Kowalski an engineer at Blockchain Tech Labs.

What advice would you offer other technologists or developers interested in getting started working on blockchain? 

My advice to offer other technologist is to start right on. The blockchain space offers a dynamic set of unique opportunities to work in a field that is not that explored from other developers hence you can easily stand out. The parallels with the foundation of the web in the 90s are so many and working on blockchain projects can empower developers, so they leave their footprint. Not to underestimate the demand for skilled engineers from financial perspective however with blockchain coming more and more to surface this is an area that offers endless opportunities. There are many projects out there looking to pay premium salary for the top talent in this area.

Getting into blockchain development will require dedication, continuous improvement and a lot of reading but it’s definitely worth it in the long run.

Give a bit of background on what you’re working on, and let us know what was it that made you want to get into blockchain?

I have been involved with cryptography since my university years. In addition for the last 5 years I have been working on various blockchain projects including ATMCoin, Clinicubes and others. For me as a software engineer, this was an interesting challenge and offered me the chance to meet really amazing, talented people. We are lucky to have some of the smartest developers working on Blockchain/DLT projects and this had motivated me to be a part of this technology.

What project in Hyperledger are you working on? Any new developments to share? Can you sum up your experience with Hyperledger?

We have started with Hyperledger Fabric and had been successfully implementing several Proof of concepts such as a Supply Chain demo, Mortgages product and Clinical Trails Management infrastructure. When Hyperledger Composer came out it was the natural move for us. It made development and testing so much easier. Since we grew in numbers within Blockchain Technology Labs it made it easier and faster for our new team members to adapt to Hyperledger quicker.

What do you think is most important for Hyperledger to focus on in the next year?

I would say building more developer tools and improving on the awesome work done on the Composer framework but also getting some out-of-the-box testing and automation tools.

Where do you hope to see Hyperledger and/or blockchain in 5 years?

Hyperledger would still be the preferred infrastructure for permissioned based blockchain and thus preferred for Enterprise applications. I don’t see that changing anytime soon. The adoption and support from Intel and IBM is key for this success. I expect blockchain type of protocols to be everywhere and replacing centralized infrastructure.

Meet the TSC: Binh Nguyen, State Street

By | Blog, Hyperledger Fabric

Back to our blog series that focuses on the motivations and backgrounds of the individuals that make up Hyperledger’s Technical Steering Committee (TSC). The TSC is a group of community-elected developers drawn from a pool of active participants and is a core element of Hyperledger’s Open Governance model. The TSC is responsible for all technical decisions – from which features to add, how to add them and when, among others.

Now let’s introduce the next Hyperledger TSC member, Binh Nguyen from State Street. Let’s see what he had to say about Hyperledger, his role in the TSC and the community!

Describe your current role, background and why you wanted to be a part of the Hyperledger TSC?

I am currently a development director at State Street. I founded Open Blockchain, an open source project, which became the initial codebase of Hyperledger Fabric. I have been the chief architect of Hyperledger Fabric project since genesis and been working passionately with the community on architecture and implementation of Fabric. With my hands-on experience in blockchain, serving the community as a TSC member would allow me to help:

1) guide our technical projects in the right direction

2) involve in building and growing our community

3) learn from other members for my professional and personal development

4) be visible: after all, it’s not about who you know, it’s about who knows you

Binh Nguyen, State Street

What are the benefits of Hyperledger’s open governance model?

I’ve been working on open source projects and learned to appreciate the model, more so for blockchain due to its potential to transform our economy, governance systems and businesses. No one company or organization should have control of the technology but by an open governance, we can ensure it is driven by the interests of the community and humanity. This is, to me, the number one reason why we do what we do in Hyperledger.

What advice would you offer other technologists or developers interested in getting started working on blockchain?

For those who want to work on shaping blockchain technologies, I would say read up and join Hyperledger; we are always welcome more developers. For those who are looking at building blockchain applications, my advice is to start small with a clear use-case, like bitcoin, a very simple but powerful and elegant application of blockchain. The key is to maximize the network effect between members participating in the blockchain. If you can crystalize that, you have a good blockchain application use-case.

What’s the one thing you hope to accomplish by being a part of Hyperledger’s TSC?

I am grateful for having been elected to TSC. My key objective is to help our community foster leading exemplar of blockchain projects for the good of everyone.

What use cases are you most excited about with Hyperledger and/or blockchain?

I am excited about a lot of blockchain use-cases as this technology can be applied to many different areas, both public and private sectors. From voting records to asset titles management to shipping and logistics. But the set of use cases that I think would have the most immediately impact on everyone of us is finance: from clearing and settlements to capital markets to payments. Financial institutions are facing once-in-a-lifetime disruption, and that’s what I am so excited about blockchain.


(11.9.17) CoinTelegraph: New Blockchain-Based Startups Create New Opportunities for Healthcare

By | News

Blockchain technology has huge potential to disrupt a wide range of industries, ranging from data management, security and healthcare as a few examples.

The Blockchain can provide a new foundation and structure for health information management by making electronic medical records more efficient, without intermediaries and empowering patients to be the owners of their own records.

More here.

Developer Showcase: Vishwasrao Salunkhe, Virtusa

By | Blog, Hyperledger Composer, Hyperledger Fabric

Our Developer Showcase blog series serves to highlight the work and motivations of developers, users and researchers collaborating on Hyperledger’s incubated projects. Next up is Vishwasrao Salunkhe, a lead consultant at Virtusa.

What advice would you offer other technologists or developers interested in getting started working on blockchain?

First start with the basic concepts of Blockchain like Cryptography, Consensus algorithm, Peer to Peer communication, distributed applications. Once you are comfortable I recommend completing the below course to get high level overview of Blockchain:

After this course, you can start playing with Hyperledger Composer Playground and start with existing examples, understand how to define business network, Assets, Participants, Transactions and Events.

You should be familiar with JavaScript. You will be able to define business network in Hyperledger Composer with a JavaScript like Language. Also with help of NodeJS SDK you will be able to talk to the underlining Hyperledger Fabric network. So, only with the JavaScript Language you will be able to develop applications (frontend, backend) around Hyperledger Fabric.

Vishwasrao Salunkhe, Lead Consultant, Virtusa

What project in Hyperledger are you working on? Can you sum up your experience with Hyperledger?

I am working on Hyperledger Fabric. I started working with Fabric 0.6. Once I got basics of it, I started writing a smart contract in the Go Language. There were few issues I was facing like setting the Hyperledger Fabric network, writing smart contracts in Go (new language for me) and deploying the smart contracts.

Hyperledger Composer is life savior for me, it made my job so easy that I am able to define my business network, assets, transactions etc with a JavaScript like language, deploy locally and test it. Before defining my own business network, I went through all existing demo business network and tried to run them, then changed few things like assets attributes, participant’s attributes and transactions.

What do you think is most important for Hyperledger to focus on in the next year?

Make developers’ lives easy. Until we have an ecosystem of tools around Hyperledger to design, develop, test, deploy blockchain applications, developers will not be able to move fast with Hyperledger

With Hyperledger Composer, it’s easy to get started, so we need more tools like composer.

Also, we need to evangelize Hyperledger projects through online talks, webinars, workshops and conferences to spread word.

As Hyperledger’s incubated projects start maturing and hit 1.0s and beyond, what are the most interesting technologies, apps, or use cases coming out as a result from your perspective?

Prior to the 1.0 release of Hyperledger Fabric, people had so many business cases to solve with blockchain but they were not enough tools to get beyond POCs. But with 1.0, people started going beyond POCs or MVPs. Some businesses are already started to use Hyperledger Fabric in production. This is good sign. Also, now new apps, tools frameworks are sprouting up all over.

I would like to see more tools and frameworks come up which will help to speed blockchain implementations. Also, giants like IBM, SAP, Oracle will come up with integrations of their existing applications with Hyperledger.

Where do you hope to see Hyperledger and/or blockchain in 5 years?

Internet made people to come close, now blockchain will make businesses to come close

As per hype made in media that blockchain will be mostly used in financial sector, I think not only in finance but fields like supply chain, Insurance, retail and most importantly government sectors will also be covered by blockchain. And Hyperledger will be leading blockchain.

Consider Shipping/Logistics scenario with IoT enabled shipping containers:

Participants: Sender, receiver, freight companies, customs, and banks, Insurance Companies

Assets: Cargo Properties, shipping documents

Business Rule: temperature in containers should always be more than 5 degree.

Sender  =====è  Transporter 1(Ship)      ======è Transporter 2 (Road)  ===è Receiver

                              Insurance Company 1             Insurance Company2   

Blockchain in Logistics/Supply Chain Example (Image Credit)

Goods moved from sender to receiver go through various transportation mode and different insurance companies are involved.

Containers are IoT enabled and data sent from them are stored into Blockchain network. Now when goods are with Transporter 1 and while transporting he does not follow business contract (E.g. Temp of containers should be below 5 degree all time), because of that some containers are not damaged/not useful, then T1 will get penalized based on smart contract and claim processing of these damaged goods will be trigger automatically for Insurance Company 1.

Also, once T1 hands over container to T2, his payment gets triggered


(11.6.17) Distributed: Hyperledger Goes to School

By | News

Now that Hyperledger is getting more popular, developers and businesspeople alike will want to get more acquainted with it. To that end, the Linux Foundation has partnered with edX to launch an online course. Founded by Harvard and MIT, edX is one of the many Massive Open Online Course (MOOC) providers on the web.

More here.

VIDEO: Hyperledger, A Greenhouse Incubator for Blockchain Projects

By | Blog, Hyperledger Burrow, Hyperledger Cello, Hyperledger Chaintool, Hyperledger Composer, Hyperledger Explorer, Hyperledger Fabric, Hyperledger Indy, Hyperledger Iroha, Hyperledger Sawtooth

Hyperledger hosts and incubates multiple technology projects, all advancing business blockchain frameworks and modules through open source collaboration. Currently, Hyperledger hosts 6 open source frameworks and 3 open source blockchain tools.

To introduce the concept of blockchain technologies and the Hyperledger organization, we created an explainer video illustrating Hyperledger as a greenhouse incubator for these open source blockchain projects. Intended to serve as a starting point suitable for all audiences wanting to learn about Hyperledger and business blockchain technologies, we hope this 3-minute explainer video will shed light on the following:

1. A distributed ledger is a common system of record with no central authority.

A ledger contains a record of your transactions, along with other transactions in the network. Distributed ledgers are multi-party databases with no central trusted authority. Blockchains can be used to record promises, trades, transactions or simply items we never want to disappear.

2. It’s vitally important to know that your copy of the ledger is identical to everyone else’s

All businesses participating in a commercial ecosystem need a ledger to contain a record of transactions. As a result, across the global market there are ledgers that organizations and individuals alike must trust. Mirrored exactly across all nodes in a given network, distributed ledgers allow everyone in an ecosystem to keep a copy of the common system of record, free from discrepancies. Nothing can ever be erased or edited; parties can only add to the ledger.

3. Hyperledger provides the underlying open source software, on top of which anyone can set up blockchain apps and services to meet business needs.

Hyperledger is incubating and promoting enterprise grade, open source business blockchain technologies, including distributed ledgers, smart contract engines, client libraries, graphical interfaces, utility libraries, and sample applications. Built under technical governance and open collaboration, individual developers, service and solution providers, government associations, corporate members and end users alike are all invited to participate in the development and promotion of these thriving technologies.

4. Hyperledger is a global, cross-industry, collaborative open source consortium.

With 170+ member organizations working across industries and competitive lines, and 400+ code contributors, Hyperledger is the fastest growing consortium in the history of The Linux Foundation’s collaborative projects. Just like you see in this greenhouse, with the help of The Linux Foundation and Hyperledger’s open source approach, everyone does their part to ensure the success of the whole, nurturing these blockchain ecosystems for evolution, expansion and continued growth.

The most renowned leaders in finance, healthcare and supply chain across the globe trust Hyperledger to build their business blockchain technologies. Who will you trust with your trust network?

We encourage developers to join our efforts on Hyperledger via github, Rocket.Chat, the wiki or the mailing lists. You can also follow Hyperledger on Twitter or email us with any questions:

 Watch and Share the video: