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Oct 14
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Staff Corner: Thanking community members for their contributions

By Ry Jones and David Boswell, Community Architects Blog, Hyperledger Foundation Staff Corner, Hyperledger Global Forum

Our community is strong and growing thanks to hundreds of community leaders around the world. We recently got back from Hyperledger Global Forum 2022 in Dublin where the strength of our community was displayed in force. While we were there, we had the opportunity to recognize our community members in a number of fun (and hopefully meaningful) ways. 

This year, on the main stage, we announced the winners of our annual Community Recognition Awards:

This year’s honorees were:

  • Daniel Szegö, DLT Advisor, CBDC Think Tank Budapest – Recognised for hosting the most meetups of any organizer this year and doing events in three languages, In addition, he also actively brings community members together around Hyperledger Fabric and Kubernetes projects
  • Josh Kneubuhl, IBM Research, IBM – Recognized for his cross project and lab collaboration with the Hyperledger Fabric community.
  • Arun S M, Staff Software Engineer, Walmart Global Tech India – Recognized for his active role in welcoming new community members on Discord and as one of the leaders of the Hyperledger India Chapter.
  • Char Howland, Software Engineer, Indicio – Recognized for her active role in the Hyperledger Aries/Identity community, including running the identity implementers calls and welcoming new members to that growing community.
  • Nicko Guyer, Senior Full Stack Engineer, Kaleido – Recognized for being very active on Discord and Github and very good at onboarding new people into the Hyperledger FireFly community.
  • Andrew Whitehead, Senior Software Architect, Portage CyberTech – Recognized for being an active Hyperledger Aries contributor who helps with onboarding new people and does a lot of work on security.
  • Antoine Toulme, Senior Engineering Manager, Splunk – Recognized for being extremely responsive on the Hyperledger Besu channels as well as contributing workshops and more.
  • Marcos Sarres, Director Executivo, GoLedger – Recognized as a co-lead our Hyperledger Brazil Chapter and organizer of many very well received meetups for the community this year.
  • Vipin Bharathan, Principal Consultant, dlt.nyc – Recognized for running the Identity WG, serving as the Chair of our Financial Services SIG and doing so much to welcome others into our community.
  • Peter Somogyvari, Software Product Architecture Manager, Accenture – Recognized for always making the time to onboard and help new community members, taking on multiple mentees through our mentorship program and so much more.


Hyperledger Foundation Executive Governing Board Chair David Treat, Executive  Director Daniela Barbosa and Senior Director of Community Architects David Boswell join Community Recognition Awards recipients Marcos Sarres of GoLedger, Arun S M of Walmart Global Tech India, Vipin Bharathan of dlt.nyc, Nicko Guyer of Kaleido and Josh Kneubuhl of IBM  on stage at Hyperledger Global Forum 2022 in Dublin.


Daniela Barbosa presents Community Recognition Awards to Accenute’s Peter Somogyvari and Splunk’s Antoine Toulme

Throughout the event, we were also handing out small pieces of swag to thank the community members who were there. Taking the time to travel to the event and spend multiple days meeting and talking with others is an important contribution attendees were making to the health of the Hyperledger community. We wanted to recognize them for their time, effort and commitment.

One of the items we were giving out were Hyperledger coins that said “Community Code Collaboration Contribution” on the back and had 2022 on the front. Since the event this year was being held in Dublin, we designed the coins to have the two color look of a 2 euro coin.

We started making coins to thank community members – an idea long championed by our current TOC Chair, Tracy Kuhrt – in 2021. People seemed to like them so we wanted to do it again this year. It also seems fun to have an ongoing series of coins that change each year that people can collect to show how long they’ve been active in the community. We don’t know what a 2023 coin would look like yet, so feel free to send us suggestions.

For special occasions, we’ve also engraved the coins for some of the technical leaders in the community. Check out this video of a coin being engraved by a laser for Danno Ferrin, our TOC Vice Chair:

There are many other ways to recognize people for the contributions they make – one of Ry’s personal favorites is a comment in the NTPd source code. At the Hyperledger Foundation, we’ve also issued badges, given poker chips for events and other contributions, published Developer Showcase blog posts and have made stickers and shirts.

Different ways to recognize people will be relevant for different people. Some people may want a coin or shirt and others may not. We’re interested to hear what sort of recognition is important to you so we can make sure what we do is meaningful. Please send us your thoughts (email community-architects@hyperledger.org). And, if you’d like to earn a coin, a token, a badge or anything else, get involved in the community, and we’ll be happy to thank you for your contributions.

Oct 05
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Climate Action and Accounting Special Interest Group (CA2SIG) wins The Hyperledger Challenge 2022!

By Hyperledger Blog, Climate, Hyperledger Besu, Hyperledger Bevel, Hyperledger Cacti, Hyperledger Fabric, Special Interest Group

The Hyperledger Climate Action and Accounting Special Interest Group (CA2SIG) has just taken first place in the Hyperledger Challenge 2022 for its prototype for Reducing Methane Leakage and Flaring with Supply Chain Tokens. 

The Hyperledger Challenge 2022 took into careful consideration the following factors: 

1. Technology advancement and research objectives
2. Impact to the blockchain ecosystem
3. Value addition through social benefits
4. Process followed to build an open-source community around the proposed project
5. Activities outside the Hyperledger community to build the ecosystem
6. Bring in innovation in the marketplace
7. Headway into the community that is not represented well within the ecosystem.

This Hyperledger Challenge 2022 award follows the recent announcement of another award from IBM’s 2022 Call for Code Green Practices Accelerator, where the CA2SIG team also took first place for its prototype. 

“The team would like to thank the Hyperledger Challenge 2022 team for supporting our project. These recent wins/awards provide our team with added momentum and validation for the solution we are developing and the larger problem we seek to solve. Moving forward our focus is on marketing our solution to the energy industry and helping to scale auditing services, crucial to achieving climate targets by mid century. ” – Bertrand Rioux, Director, Two Ravens Energy & Climate Consulting

This prototype, which is built using Hyperledger Besu, Hyperledger Fabric, Hyperledger Bevel and Hyperledger Cactus, represents an important step towards creating an open climate accounting system that can be used to decarbonize corporate supply chains. By building a solution that can provide a free flow of trusted environmental data, we can create a more efficient marketplace that can unlock the power of green finance, consumer demand and government regulation to work together to decarbonize corporate supply chains. `

Click the CA2SIG One-Pager to learn more. We also invite you to visit the Climate Action and Accounting Wiki or join one of our bi-monthly meetings to learn about the different opportunities to get involved!

Apr 06
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Call for Applications: 2022 Hyperledger Mentorship Program

By Hyperledger Blog, Hyperledger Aries, Hyperledger Besu, Hyperledger Bevel, Hyperledger Cacti, Hyperledger Fabric, Hyperledger Indy, Hyperledger Mentorship Program, Hyperledger Ursa

Want to jump start a career in blockchain development? Ready to build hands-on skills developing leading-edge open source technologies? Looking to work directly with mentors who are invested in you and your work? Then the Hyperledger Mentorship Program is for you. 

Now in its sixth year, the Hyperledger Mentorship Program provides a structured and guided learning opportunity for anyone, at any career stage, looking to get started in the open source movement. With full and part time options, fully remote work and a stipend, the projects are designed to be a pathway to becoming a contributor to the Hyperledger community that work for students, people in career transition and anyone else who wants to develop or sharpen their knowledge of cutting-edge blockchain technologies. Applications are now open.

This year, the Hyperledger Mentorship Program has grown to 30 planned part and full-time projects covering a range of technologies, challenges and technical difficulty levels and includes non-development projects such as Ecosystem Analysis and Developer Marketing. Each project is designed and proposed by active members of the Hyperledger community. Those who propose the projects serve as the mentors and work closely with their mentees on developing a project plan, setting milestones and solving problems. Mentees can expect regular evaluations and feedback. For more about the program, including the schedule and stipend details, go here.

Over the last five years, more than 70 mentees have completed Hyperledger Mentorship projects. Each of these mentees have made concrete contributions to Hyperledger projects and built important connections in the community. Some, like Bertrand Rioux, have gone on to become mentors themselves:

“I was accepted into the Hyperledger mentorship program last year after seeking a community to help advance my professional goals of developing software for climate action. I was fortunate to find a diverse group of mentors that helped me build the knowledge and skills I needed to effectively contribute to the Hyperledger open source community and to have the opportunity to develop technical expertise in a field I was actively working in. In addition to delivering a secure identity management solution for a Hyperledger Fabric Network, I started contributing my own ideas to the open source operating system for climate action. As a result, I am now taking a leadership role in the community. In addition to serving as mentor in this year’s program, I proposed a project on reducing waste emission in the oil & gas industry that was accepted.” – Bertrand Rioux, Independent Energy Consultant and Mentor for the Multiple Data Integration to Hyperledger Fabric Climate Accounting Network project

To learn more about the Hyperledger Mentorship experience and outcomes, check out these  spotlights on last year’s projects with highlights from both the mentors and mentees.

Read on for descriptions of some of the projects planned for this year:

Multiple Data Integration to Hyperledger Fabric Climate Accounting Network

The Hyperledger Labs blockchain-carbon-accounting project includes a Hyperledger Fabric network for recording the carbon and Greenhouse Gas (GHG) emissions that cause climate change.  Since there are many activities that cause such emissions, the network is designed to accept data from multiple sources of measurements.  In this project, we will demonstrate integrations from measurement sources with blockchain networks by integrating the ThoughtWorks cloud computing emissions calculator, the NREL OpenPath mobile application, and other web- and mobile-based API’s sources to turn instrumented readings into emissions measurements. It will leverage previous projects involving Hyperledger Cactus, Vault security engines, and client security for Hyperledger Fabric.

The expected outcomes of this project are

  • Successful integration of the mobile apps and API’s with Hyperledger Fabric
  • Benchmark comparison of Hyperledger Fabric and alternatives
  • Documentation and tutorials for integrating future data sources

Demonstrate Interoperability using Hyperledger Bevel and Cactus

Hyperledger Cactus support ledger Interoperability but use a local deployment for testing; Hyperledger Bevel supports production-worthy deployments. This project aims to support Cactus deployment using Bevel to demonstrate production-like usage of Hyperledger Cactus. 

The steps will be following:

  1. Deploy a Hyperledger Fabric network using Bevel on a Managed Kubernetes cluster
  2. Deploy a GoQuorum network using Bevel on a Managed Kubernetes cluster (can be the same cluster for simplicity).
  3. Make changes in Hyperledger Bevel code to deploy the Cactus connectors in both the above networks.
  4. Run Cactus test cases.

The expected outcomes of this project are

  • Successful Interoperability testing using Cactus on  production like DLT networks.
  • Update to Hyperledger Bevel code to automatically deploy the Cactus plugins.
  • Update to Documentation of Bevel and Cactus.
  • Detailed tutorials and learning materials which would benefit Bevel and Cactus communities.

Hyperledger Fabric-Ethereum token bridging

One of the key use cases of blockchain integration is asset bridging: in essence, “locking” an asset (typically, a native coin or token) in a smart contract on its authoritative ledger and making available corresponding, newly minted (wrapped/shadow/…) assets on another. By now, bridging is supported by quite mature solutions in the cryptoworld; however, the same is not true for “consortial” distributed ledger technologies. At the same time, such functionality can be expected to become an important requirement in the not too distant future: for instance, a central bank may choose to create a high performance, Hyperledger Fabric-based Central Bank Digital Currency (CBDC) ledger with a strongly controlled set of “smart contracts,” but allow controlled “bridging out” of the currency to dedicated distributed ledgers of industrial/enterprise cooperations. 

Last year, a CBDC prototype with such functionality was created at the Dept. of Measurement and Information Systems of the Budapest University of Technology and Economics (BME), in a research project supported by the central bank of Hungary (MNB); our initial experience with a custom Hyperledger Cactus and TokenBridge based solution showed that this is a problem worth more targeted experimentation and systematic R&D.

The expected outcomes of this project are

  • Report on asset representation in Hyperledger Fabric and mapping approaches to standard Ethereum tokens
  • Report on bridging approaches and technologies and their applicability for bridging from/to Fabric
  • Requirement specification
  • Design specification
  • Prototype implementation and small demo of bridging at least ERC-20 or ERC-721 to Ethereum – and back

Client Connector for Hyperledger Besu

Develop a connector that provides both synchronous and asynchronous modes of interacting with a running Hyperledger Besu node. The connector would act as an interface between an enterprise application and the Hyperledger Besu node for data ingestions and it could provide event subscription options.

The scope of the project would also include an end-to-end test on a sample network.

The expected outcomes of this project are

  • Design and implement the connector.
  • A new Hyperledger Labs project is proposed with a documentation.

GVCR: Secure Verifiable Credential Registries (VCR) for GitHub & GitLab

As conceptualized and standardized by the W3C, the Verifiable Credentials protocol is one of the three pillars of Self-Sovereign Identity, together with the Decentralized Identifiers protocol (DIDs) and Distributed Ledger Technology (or Blockchain). The project aims to design and build a verifiable credential registry (VCR) on GitHub repository, namely GitHub-based Verifiable Credential Registry (GVCR), by leveraging existing GitHub APIs, and other open-source tools provided by other Hyperledger projects, such as Hyperledger Aries, Hyperledger Indy, and Hyperledger Ursa. The basic architecture is already built. For more details about the conceptional design and workflows, please refer to the GitHub repository GitHub-VCR.

The expected outcomes of this project are

  • A verifiable credential registry based on one or more GitHub repositories.
  • Command-Line utility to automate the process of verification of a credential.
  • Proper test cases and documentation.
  • Codebase maintained with proper read me document.

The Hyperledger Summer Mentorship Program is part of the Linux Foundation’s overall commitment to mentoring. The application process is being managed through LFX Mentorship, a platform created by the Linux Foundations to train future open source leaders. 

Check out the full list of mentorship projects and start your application today. The deadline to apply is May 10. Mentees from diverse communities are encouraged to apply. All are welcome here!

Mar 17
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Hyperledger Cactus: Release V1 on the Road to General Blockchain Integration

By Peter Somogyvari at Accenture and Takuma Takeuchi at Fujitsu Limited Blog, Hyperledger Cacti

Since its inception as a Hyperledger project almost two years ago, Hyperledger Cactus has come a long way. Today, the maintainers are excited to announce a version 1 release that supports many exciting integration applications and moves us in the direction of our “dream” modular architecture.

For creating a new token economy beyond financial and non-financial areas, blockchain interoperability has an essential role in interacting with multiple blockchains in various industries. But it is challenging to develop codes integrating with multiple blockchains because the SDKs provided by each blockchain for posting transactions or getting block data are entirely different. So, this community published a blockchain interoperability tool called “Hyperledger Cactus” to help engineers integrate multiple blockchains easily.

Hyperledger Cactus is a pluggable enterprise-grade framework for transacting multiple blockchains. This project aims to provide a decentralized, adaptable and secure integration between blockchains and various platforms. Cactus codes are composed of three types of parts.  “Cactus Servers” provide abstracted APIs that can be uniformly called independent of each blockchain SDK’s format, and APIs that can use each blockchain SDK wrapped with the typescript-axios API format using Cactus API Server. “Business Logic Plugins” coordinate cross-blockchain business logic applications. “Ledger Connectors” facilitate connections to various blockchains, including all the blockchains of Graduated Hyperledger projects.

The Hyperledger Cactus v1 release includes the following modules:

  • Ledger Connectors – connectors to communicate with various blockchain platforms using multiple programming languages: (TypeScript and Python)
    • Hyperledger Besu
    • Hyperledger Fabric
    • Hyperledger Indy
    • Hyperledger Iroha
    • Hyperledger Sawtooth
    • Corda
    • Go-Ethereum
    • Quorum
    • Xdai
  • Business Logic Plugin samples – the application integrates multiple blockchains:
    • supply-chain-app: management application of supply chains process using Hyperledger Besu, Fabric, and Quorum
    • carbon-accounting: carbon accounting application using Ethereum and Hyperledger Fabric
    • discounted-cartrade: car ownership trading application using Ethereum currency, tokens on Hyperledger Fabric, and digital identity certification using Hyperledger Indy
    • electricity-trade: automatic electricity payment application using Ethereum currency, whose events are triggered by electricity metering transactions on Hyperledger Sawtooth.
  • Keychain Plugins – A set of plugins for storing sensitive information in storage engines outside of Cactus.  Currently, these plugins support AWS, GCP, Azure, and Hashicorp Vault
  • Support Libraries – Various utility libraries that simplify programming business logic plugins. These are great for setting up your applications and can even help your test automation, where the simulation of a new blockchain is required with the lowest possible resource usage.

As part of the continual effort to mitigate risks, the current 1.0.0 release is undergoing a a third-party security audit at the time of this writing.The process will take about 6 to 8 weeks to complete, but we are planning to keep the 1.0.0 API stability in place as dictated by the semantic versioning rules.

It’s effortless to try out Hyperledger Cactus today. We provide instructions for running a sample implementation of the Business Logic Plugins (service applications in Hyperledger Cactus architecture) that takes advantage of various blockchain platform features so you can evaluate Hyperledger Cactus on your PC.

It is even possible to set up a container with a supply chain example using a single command-line command! Here is a link to this example. We encourage you to see for yourself how easy it can be to get started with blockchain integration using Hyperledger Cactus.

Our long-term architectural goals for Hyperledger Cactus are to offer a flexible, modular system that allows users to configure blockchain integration systems to fit their needs exactly. We want users to reuse code as much as possible while still avoiding code bloat and duplication in the features. In future releases, we will actively cooperate with other Interoperability infrastructures besides Cactus, and we hope to provide more user-friendly tools by incorporating more features.

(Note: for more on the Hyperledger interoperability ecosystem, read Why is Interoperability Needed?)

We would love to welcome you into the Hyperledger Cactus community.  Unlike our project namesake, we are not prickly!  Whether you want to contribute or are just interested in using Cactus, we would love to connect.

It’s easy to get in touch with us!  The simplest way is to reach out on the Hyperledger Cactus Discord channel. (New to Discord? Go here for more and to get signed up.) We have pair programming sessions set up for new contributors and users almost daily (please check the Hyperledger calendar), so we would be more than happy to help if you would like to contribute or want help getting up and running. We look forward to hearing from you!

Copyright © 2022 The Linux Foundation®. All rights reserved. Hyperledger Foundation, Hyperledger, and the other Hyperledger Foundation trademarks are trademarks of The Linux Foundation. For a list of Hyperledger Foundation trademarks, please see our Trademark Usage page. Linux is a registered trademark of Linus Torvalds. Privacy Policy and Terms of Use.

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