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Hyperledger Fabric

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 29
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Hyperledger-Powered Solutions Helping to Reshape Healthcare

By Hyperledger Blog, Healthcare, Hyperledger Fabric, Hyperledger FireFly

For decades, the healthcare industry has faced the challenge of juggling a huge (and growing) amount of patient, payer, provider and pharmaceutical data with managing accuracy, access, security and privacy. There has been continuous innovation and investment aimed at breaking down information silos and improving the efficiency and effectiveness of data reporting and sharing. Hyperledger technologies power an increasing number of the solutions that are taking on these challenges head on and creating new models for the industry.

Read on for a sampling of these Hyperledger-powered solutions and the ways they are helping to streamline a range of critical healthcare processes. And join the conversation using #HyperledgerHealth on social channels.

Avaneer Network

Founded by a consortium that includes Aetna, Anthem, Cigna, Cleveland Clinic, HCSC, IBM, The PNC Financial Services Group, Inc., and Sentara Healthcare, Avaneer Health has built a private, secure, and trusted technical healthcare network where stakeholders can collaborate to streamline and improve the healthcare experience while increasing administrative efficiency. The Avaneer Network leverages Hyperledger Fabric-based blockchain technologies to ensure privacy, security and content-based use of data. Participants connecting to the Avaneer Network have access to a range of solutions for securely transacting and administering healthcare and deploy innovative solutions that streamline processes. The first network participants, all founding members of the consortium, represent 80 million covered lives and 14 million annual patient visits.

IBM Digital Health Pass

IBM Digital Health Pass, built on Hyperledger Fabric, offers a multi-credential verifier that organizations can use to manage and execute their verification policies for COVID-19 and vaccination status in a way that balances the privacy of the individual with the requirements set by the organization and local health authorities. With IBM Digital Health Pass, organizations can verify multiple types of COVID-19 health credentials, such as Good Health Pass, IBM Digital Health Pass, Smart Health Card and EU Digital COVID Certificate. Privacy is central to the solution, where the verifier application minimizes the personal data that is ever displayed to the user through the execution of business rules and it never lets any personal data leave, or be stored in, the verifier app.

KrypC Pharmaceutical Delivery Supply Chain Solution

KrypC’s pharmaceutical supply chain solution uses Hyperledger Fabric to connect pharmaceutical manufacturers and carriers to collaborate on the safe delivery of drugs. The solution focuses on end-to-end traceability to provide an audit trail for the efficacy of drugs by capturing and verifying information such as the manufacturing date, location in transit, and more. With multiple handoffs across handling agents across continents, there is a crucial need for trusted, end-to-end visibility of pharmaceutical shipments, conditions, and documents. With this solution, Kypc leverages blockchain’s inherent ability to trace drug provenance and create an immutable record of the lifecycle of a drug and how it was handled to address the challenges the pharmaceutical industry faces, both in sourcing and distributing drugs.

Synaptic Health Alliance Decentralized Provider Data Directory 

The Synaptic Health Alliance is a coalition of healthcare leaders working to solve their industry’s toughest problems through blockchain technology. Their objective is to create a blockchain-powered platform that enables a culture of innovation, removes friction and solves the shared challenges impacting constituents across health care today.

For their first application, they tackled the challenge of providing healthcare organizations with accurate provider demographic data. Today, healthcare organizations typically collect provider demographic data in separate IT systems maintained by each organization independently. This promotes vast inefficiencies and duplication of efforts (costing roughly $2.1 billion across the industry), while also potentially reducing data quality. 

To solve this, Synaptic created a blockchain-based Decentralized Provider Data Directory leveraging Kaleido and the capabilities of Hyperledger FireFly. Through the power of blockchain, participants are now able to crowdsource provider demographics. Token economics incentivize the creation of accurate data, which can then be used by other providers to update their own records, reducing duplication of effort, streamlining administration, and saving money. 

Ongoing activity in the space is driven by the very active Hyperledger Healthcare Special Interest Group (SIG), which unites healthcare professionals and technologists from around the world in advancing the state of the healthcare industry through the implementation of technology solutions using blockchain technologies in general, and the umbrella of Hyperledger frameworks and toolsets in specific. It includes subgroups focused on patients, payers and healthcare interoperability.

Cover image: Pixabay

Feb 28
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#HyperledgerInterop: Delivering Cross-Chain Interoperability with Hyperledger Technologies

By Hyperledger Blog, Hyperledger Besu, Hyperledger Fabric, Hyperledger Labs

We kicked off #HyperledgerInterop month with Why is Interoperability Needed?, which explains the drivers for interoperating networks and then deep dives into the different Hyperledger technologies tackling the challenge. 

Below, we continue the conversation with highlights of some leading-edge efforts to deliver cross-chain interoperability built using Hyperledger technologies:

Cross-Ledger Interbank Settlement: As part of a series of wholesale CBDC trials, Banque de France, the French Central Bank, completed cross-ledger interbank settlement transactions in a multi-blockchain environment. Conducted in association with HSBC and IBM, this test case entailed the issuance and trading of digital bonds, settled instantly using CBDC. Transactions occurred across blockchain environments operated by HSBC for the custody of the assets and by the Banque de France for the securities settlement and the CBDC. In the trial, Hyperledger Fabric and R3’s Corda were able to transact with each other using Weaver, a Hyperledger Lab initially contributed by IBM. 

Digital Green Bond Project: The Bank for International Settlements Innovation Hub (BIS) Innovation Hub and the Hong Kong Monetary Authority (HKMA) set out to improve efficiencies in the distribution of green bonds and more insightful reporting on the environmental impact of projects supported by the bonds through Project Genesis. The aim is to develop digital platforms that will allow investors to buy and sell bonds that support green projects with real time access to both the financial performance of the bond and such metrics as clean energy created and O2 reduced by the investment. The first prototype from Project Genesis was developed with Digital Asset in partnership with GFT and leveraged Daml smart contracts as well as Digital Assets interoperability protocol layered over Hyperledger Besu and Hyperledger Fabric blockchains. It achieved real-time synchronization across these two ledgers while preserving the level of privacy demanded by regulated bodies. The prototype drives market efficiency with a unified view of the entire trade lifecycle and a single source of truth that automates market rules and adheres to market regulations.

Interoperable platform for international exchange of CBDCs: The BIS Innovation Hub, Hong Kong Monetary Authority, Bank of Thailand, People’s Bank of China, and Central Bank of the United Arab Emirates are working together on a prototype multi-CBDC platform for international payment that joins up national digital currencies on a common interoperable platform. During the Phase 2 and 3 explorations of the project, mBridge (formerly Inthanon-LionRock), they worked with ConsenSys on a Hyperledger Besu implementation that completed an international exchange of multiple CBDCs in seconds as opposed to several days and has the potential to reduce costs to users by up to half. 

Multichain Trade Settlement: In January, 2022, Tokio Marine & Nichido, NTT DATA, STANDAGE and TradeWaltz jointly conducted a demonstration experiment for a new trade settlement system in which electronic B/Ls (bills of lading) and digital currencies were exchanged simultaneously using two different blockchain networks. The simultaneous transfer of digital assets and digital currencies was conducted by Datachain with the cooperation of NTT DATA, and leveraged YUI, a Hyperledger Lab that was initially contributed by Datachain, to interconnect Hyperledger Fabric and Ethereum. Datachain successfully confirmed that two assets can be exchanged simultaneously by DVP settlement between digital assets on services built with Hyperledger Fabric and digital currencies on Ethereum.

Chime in on social to share other examples of #HyperlegerInterop.

Cover photo by Wilhelm Gunkel on Unsplash

Feb 09
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Hyperledger Technologies Dominant for Enterprise Blockchain Deployments on 2022 Forbes Blockchain 50

By Hyperledger Blog, Hyperledger Besu, Hyperledger Cacti, Hyperledger Fabric, Hyperledger Indy

“You’ve come a long way, blockchain!” declares Forbes in the 2022 Blockchain 50, an annual list that tracks how billion dollar companies from around the world are innovating with the technology. Now in its fourth year, the Forbes Blockchain 50 has evolved just as much as this market. 

The mainstreaming of both cryptocurrencies and their underlying technologies have reshaped business around the world. For many companies on the list, the innovation comes from new models of investing and transacting in crypto markets. But, as Forbes put it, “Cryptocurrencies hog the spotlight, but blockchain’s biggest innovations are below the surface, saving billions each year for the world’s largest companies.”

For the companies on the list that have made blockchain technology a core foundation of their business operations, Hyperledger technologies, particularly Hyperledger Fabric, continue to be the standard. At least 13 companies on this year’s list have built their strategic networks on Hyperledger technologies, far outpacing any other technology or platform among these kinds of deployments. 

Hyperledger Besu, Hyperledger Indy and Hyperledger Cactus are also named as key technologies by companies on the list, highlighting the value of Hyperledger Foundation’s multi-project strategy.

Congratulations to Hyperledger Foundation members DTCC, Fujitsu, Nornickel, Oracle, Tech Mahindra, Tencent and Walmart for making the Forbes Blockchain 50 in 2022. Read more on how Tech Mahindra, Walmart and other member companies are using Hyperledger technologies in our growing library of case studies.

Dec 21
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#HyperledgerSocialImpact: Highlighting Hyperledger-powered solutions driving change

By Hyperledger Blog, Hyperledger Fabric, Hyperledger Iroha

There’s no better time of year to reflect on the power of technology to improve lives so we are celebrating #HyperledgerSocialImpact month. Organizations of all sizes and types are levering Hyperledger technologies to power solutions that are driving real change. The impact ranges from boosting financial inclusion to tackling climate change and sustainable and equitable business practices to increasing access to healthcare, education and more

Read on for just a sampling of the solutions powered by Hyperledger technologies that at work for the greater good. 

Bakong (and beyond): CBDC payment data for credit underwriting in emerging economies

Access to credit is crucial for micro-, small-, and medium-sized enterprises (MSMEs) to share in growth, especially in emerging economies. However, they often lack the records needed to verify creditworthiness. Hyperledger contributor SORAMITSU has learned firsthand the challenges faced by emerging-market MSMEs and lending institutions alike through its work on Bakong, the National Bank of Cambodia’s blockchain-based digital currency and payment infrastructure.

As a finalist in the Monetary Authority of Singapore’s Global CBDC Challenge, SORAMITSU designed an app capable of querying payment data relevant to credit underwriting. The app is designed for Bakong—which is built using Hyperledger Iroha—but could overlay any DLT-based payment system. Lenders could use the app to query data that are relevant to a given wallet’s creditworthiness, such as payments volume, regularity and geographical area of incoming and outgoing payments, and monthly average balance. Importantly, the app only allows queries to be designed in Boolean (true/false) format, and requires approval (a cryptographic signature) from the wallet being queried. By allowing lenders to query wallets under strict conditions of data minimization and informed consent, the application enables accurate underwriting, while mitigating the risk of data monopolization and threats to privacy. SORAMITSU will draw on the lessons learned in the MAS Challenge throughout its work on CBDC apps and functions targeting social impact worldwide—including in its new cooperation with the central bank of Laos.

Circulor: Transparency for conflict and critical minerals sourcing in the electronics and electric vehicle supply chain

Demand for raw materials such as cobalt, tantalum, and tungsten, which are critical to electronics and electric vehicle battery manufacturing, grows exponentially. Large quantities of these minerals come from Central Africa, where human rights organizations report extremely bad working conditions and cases of child labor. In 2014, UNICEF reported that there were as many as 40,000 child miners in the Democratic Republic of Congo alone. Amnesty International, meanwhile, reports that the cobalt industry is rampant with illegal and unethical practices. This results in increased pressure on manufacturers to ensure the ethical sourcing of their raw materials and full visibility into their supply chains. Leveraging Hyperledger Fabric and the Oracle Blockchain Platform, Circulor builds solutions to track minerals provenance and CO2 emissions and also improve efficiency in complex global supply chains. EV manufacturers like Volvo, Polestar, Mercedes-Benz and others who’ve committed to ethical sourcing utilize Circulor’s solution to track vital information about the authenticity and sourcing of raw materials—from mining and refining to actual use in battery units of the cars rolling off the assembly line.

INDETAIL: Socially conscious projects on the foundation of blockchain networks

INDETAIL, based in the Japanese city of Sapporo, is spearheading the global development of blockchain distributed ledger networks, working with investment-worthy partners on innovative, socially conscious projects. Among INDETAIL’s projects leveraging the Hyperledger Fabric-based Oracle Blockchain Platform are a token-based electric transportation system for seniors; a joint effort with Hokkaido Electric Power on electric vehicle charging stations in rural areas; an automated multilingual smart check-in service “maneKEY” for accommodation facilities; and the Riso Card, a digital wallet that supports online currencies and enables fingerprint identification.

Jyoti – Fair Works: Blockchain tech to help keep “fair fashion” in style

Jyoti – Fair Works is leveraging a Hyperledger Fabric-powered solution to give customers a view into its humanitarian supply chain. From its start, the company has made supply chain transparency part of its fair fashion brand. However, as demand has grown in recent years, Jyoti – Fair Works found its downstream supplier network was difficult to track. To maintain that transparency and to better explain it to the company’s customers, Jyoti – Fair Works has started using a blockchain application built on the Oracle Blockchain Platform by retraced, a participant in the Oracle for Startups program. By mapping its supply chain data—including certified details about the cotton growers, textile manufacturers, fabric dyers, designers, and seamstresses—in retraced’s application, Jyoti – Fair Works can update order, delivery, and production schedules and then create, print, and affix QR codes to both physical and digital garment tags.

KrypC  Environmental Footprint Tracker: Showing consumers each bottles carbon and water footprint

KrypC has partnered with Heineken for a pilot blockchain program to show consumers each bottles’ carbon and water footprint. Imagine finding out the environmental footprint of your beer bottle by just one click! Hyperledger Fabric helped make this realistic by tackling the challenge of realizing full transparency over the hundreds of thousands of farmers in Heineken’s global supply chain. Consumers through this pilot were able to scan their bottle and view its actual journey as well as its environmental impact.

Oceanworks and Keep Sea Blue: Traceability of recycled plastics used in making consumer and industrial goods

Powered by Oracle Blockchain technology based on Hyperledger Fabric, Oceanworks and Keep Sea Blue provide traceability platforms and certifications that are used to encourage effective plastic waste collections from oceans and beaches, linked to sustainable reuse and certification of products made from the recycled materials. Oceanworks uses Oracle’s Intelligent Track & Trace SaaS application, and Keep Sea Blue uses a custom application built directly on the blockchain platform. Both companies have implemented monitoring processes that connect the plastics value chain—collectors, recyclers, manufacturers, brand owners—to track the journey of plastic waste, creating a transparent digital audit trail of the recycled material, and ensuring end-to-end recycled product transparency and traceability.

 Symbridge: Building a market of trust

Envision this: A marketplace where there is trust and transparency. For a free market to operate truly efficiently, transparency is a vital ingredient. Transparency and trust are becoming increasingly important to investors who demand ready access to information, having been taken advantage of too many times or been shocked by headlines that have impacted their portfolio or their expectations for doing business with a company. In an industry like crypto where the market remains highly volatile, regulators are rightfully concerned for the consumer in being able to understand all risks involved.

Symbridge is the first of its kind digital asset exchange looking to change this. Built on the fundamentals of trust, innovation, and transparency, Symbridge combines all the security, efficiency, transparency, and accuracy of a decentralized exchange with the high-frequency and low-latency trading of traditional exchanges. Licensed in the United States, the Symbridge validation network, which was built using Linux Foundation’s Hyperledger Fabric, solves for these issues and helps to build a market of trust. All transactions that have taken place on the blockchain are visible to users of Symbridge’s blockchain explorer, allowing for full auditability. This creates a scenario in which investors can feel confident they are aligned with a company that shares their values and is willing to promote further positive impacts across the industry. 

Join the conversation using #HyperledgerSocialImpact on social channels. Or get involved with the Social Impact Special Interest Group.

Cover photo by Louis Maniquet on Unsplash 

Dec 20
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Hyperledger Mentorship Spotlight: Implement Cross Chain Contract Invocation Using ‘ServiceMesh’ Way

By Hyperledger Blog, Hyperledger Besu, Hyperledger Fabric, Hyperledger Mentorship Program

The Hyperledger Mentorship Program is a structured hands-on learning opportunity for new developers who may otherwise lack the opportunity to gain exposure to Hyperledger open source development and entry to the technical community. These Mentorship Spotlights highlight the work done by the Mentors and the Mentees as part of their program participation. Learn more here.

 

Mentorship Project Title

Implement Cross Chain Contract Invocation Using ‘ServiceMesh’ Way
Description To implement on-chain contract development kits and off-chain relay plugin for different permissioned blockchains
Status COMPLETED 
Difficulty MEDIUM 
Additional Details Learning Objectives, Expected Outcomes and Project Results available here.

Final Project Video

Mentee

Shritesh Jamulkar

National Institute of Technology Raipur

“The Hyperledger Mentorship Program has been a great opportunity for me to dive into the world of open source development. It not only let me understand the fundamentals of open source development but also develop a library to support multiple client-side solidity code for EVM-based blockchains for smart contract interoperability through interfaces. The project helped me a lot in implementing the theoretical knowledge learned in university in real-world projects. I am so glad that I got a very supportive mentor. Despite our timezones, he helped a lot in every aspect of the project. “

Mentor

Kai Chen

“I am honored to complete my second Hyperledger mentor tour. I am very happy to be able to share my own design concept with everyone. It may not be perfect, but it may bring some inspiration to others. I am very grateful to the mentee who participated in this project. He was able to find the flaws in the earlier design in his own practice and perfected the new design after our discussion. He learned the core principles of cross chain from it, and, at the same time, learned the application of transaction locking in the cross-chain scenario. The whole process is very beautiful. We really found joy in the  knowledge exchange brought about by open source. From this process, I also realized the fun of open source collaborative work. I hope to continue to participate in the future and witness the future of open source collaboration.”

A special thanks to the Hyperledger member companies for funding this important program. To learn more about our Hyperledger Mentorship Program and how you can participate in our next cohort, head over to our program overview page on the Hyperledger wiki.

Dec 20
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Hyperledger Mentorship Spotlight: Support Decentralized Governance for Smart Contracts in Fabric Python SDK

By Hyperledger Blog, Hyperledger Fabric, Hyperledger Mentorship Program

The Hyperledger Mentorship Program is a structured hands-on learning opportunity for new developers who may otherwise lack the opportunity to gain exposure to Hyperledger open source development and entry to the technical community. These Mentorship Spotlights highlight the work done by the Mentors and the Mentees as part of their program participation. Learn more here.

 

Mentorship Project Title

Support Decentralized Governance for Smart Contracts in Fabric Python SD
Description To support decentralized governance for smart contracts in Hyperleger Fabric Python SDK and add features such as private data sharing/verifying and external chaincode launcher.
Status COMPLETED 
Difficulty MEDIUM 
Additional Details Learning Objectives, Expected Outcomes and Project Results available here.

Final Project Video

Mentee

Qiwen Chen

University of Liverpool

“The mentorship program at Hyperledger opened my pathway to open source contributions and showed me some of the most exciting applications of blockchain. I love the very process of learning a framework used by the industry and helping to design and code new features. Another cool thing about open source contribution is the freedom that you can work anywhere, communicating and pair-programming with your mentor and collaborators over the screen. The most exciting thing is that I gained experience in working with the open source community and turning my coding passion into real impact, which school projects can hardly match.”

Mentor

Dixing Xu

“The mentorship program is a great opportunity for students to learn and contribute to the project and Hyperledger community. I was a mentee three years ago, and I have been working on the Fabric Python SDK since then. The developers from the Python community will be able to use the Fabric SDK more conveniently with the support of decentralized governance for smart contracts. The management of the new chaincode lifecycle has been implemented thanks to Kiv. I am happy to help Kiv learn more about Hyperledger Fabric and the Python SDK, and I hope we can continue to work on adding more features to the project.”

A special thanks to the Hyperledger member companies for funding this important program. To learn more about our Hyperledger Mentorship Program and how you can participate in our next cohort, head over to our program overview page on the Hyperledger wiki.

Dec 15
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Hyperledger Mentorship Spotlight: Implement Client Side Security for Climate SIG Fabric Application

By Hyperledger Blog, Hyperledger Fabric, Hyperledger Labs, Hyperledger Mentorship Program

The Hyperledger Mentorship Program is a structured hands-on learning opportunity for new developers who may otherwise lack the opportunity to gain exposure to Hyperledger open source development and entry to the technical community. These Mentorship Spotlights highlight the work done by the Mentors and the Mentees as part of their program participation. Learn more here.

 

Mentorship Project Title

Implement Client Side Security for Climate SIG Fabric Application
Description To explore and implement an application with client side authentication for Hyperledger Fabric utility emissions data channel.
Status COMPLETED 
Difficulty HIGH 
Additional Details Learning Objectives, Expected Outcomes and Project Results available here.

Final Project Video

Mentee

Bertrand Rioux

King Abdullah Petroleum Studies and Research Center

“Climate side security involves moving private keys of users off Hyperledger Fabric network servers. To solve this problem, I built a custom identity provider type for Fabric using the WebSocket protocol. This required designing an identity server to create WS-X.509 certificates using secure asynchronous communication between a Fabric app and a user’s external keys. Learning how to build a custom crypto wallet app compatible with Fabric and contributing to active Hyperledger projects, including Hyperledger Cactus and the Blockchain Carbon Accounting Lab, were highly rewarding experiences. This mentorship project has helped accelerate my goal of building technology for climate action.”

Mentors

Si Chen

Open Source Strategies, Inc.

Kamlesh Nagware

Snapper Future Tech

Si Chen

“This mentorship started because we wanted to have our Hyperledger Fabric emissions accounting application authenticated at the client like other dApps. It went through several twists and turns as we tested different approaches. In the end, we came up with an elegant solution that could be used for mobile, IOT, and web apps. The mentoring process taught me more about how to bring more developers on board and listen to their input while still providing guidance on the direction of the project. This combination is very important in an open source, distributed development model.”

Kamlesh Nagware

“For this research project, which aimed to determine the right client side identity approach, we initially had something in mind like use TrustID but then turned to exploring Hyperleger Fabric off-line signing but for real client side identity model. Its very important to have a mechanism like Metamask in Ethereum. This was a really challenging project. Our mentee, Bertrand Rioux, put his research and experience with cryptography and client security to work in implementing this project. Special thanks to Pritam Singh, who is a mentee in another project, for joining hands to help build a more secure architecture design for the client security model in Hyperledger Fabric. Designing and adding WebSocket and supporting additional cryptography algorithms to the Hyperledger Fabric node SDK is the real achievement of this project.”

A special thanks to the Hyperledger member companies for funding this important program. To learn more about our Hyperledger Mentorship Program and how you can participate in our next cohort, head over to our program overview page on the Hyperledger wiki.

Dec 14
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Hyperledger Mentorship Spotlight: Blockchain Integration for Climate Emissions Data with Fabric and Cactus

By Hyperledger Blog, Hyperledger Cacti, Hyperledger Fabric, Hyperledger Mentorship Program

The Hyperledger Mentorship Program is a structured hands-on learning opportunity for new developers who may otherwise lack the opportunity to gain exposure to Hyperledger open source development and entry to the technical community. These Mentorship Spotlights highlight the work done by the Mentors and the Mentees as part of their program participation. Learn more here.

 

Mentorship Project Title

Blockchain Integration for Climate Emissions Data with Fabric and Cactus
Description To implement an integration from Hyperledger Fabric utility emissions data channel to issue tokens on an Ethereum network using Hyperledger Cactus.
Status COMPLETED 
Difficulty HIGH 
Additional Details Learning Objectives, Expected Outcomes and Project Results available here.

Final Project Video

Mentee

Pritam Singh

Indian Insitute of Technology

“I contributed to making the carbon accounting application (a Hyperledger Lab from the Hyperledger Carbon Action SIG) more secure, stable and maintainable. To improve the security of the application, I designed and implemented offline signing of Hyperledger Fabric’s transactions with private keys stored in HashiCorp’s vault server. In order to make the application production ready, I used the Hyperledger Cactus connectors for integrating multiple blockchain. By employing test-driven development, I made the codebase more maintainable. Thanks to the guidance of all my mentors, I was able to achieve all my goals for the mentorship. 

Through this mentorship, I got the opportunity to see how community driven projects are developed with contributions coming from across the globe.”

Mentors

Si Chen

Open Source Strategies, Inc

Peter Somogyvari

Accenture

Kamlesh Nagware

Snapper Future Tech

Si Chen

“This mentorship addressed the important issue of how to integrate emissions data stored on Hyperledger Fabric with tokens created in Ethereum. Our mentee had strong technical skills and was able to solve many complex technical challenges in making this integration work. Working on open source projects is a great way for mentees to prepare for the real world as it will give them a chance to work with other developers across different areas, figure out existing code and learn the importance of communicating well. For mentors, it’s a great way to introduce new talent into our projects and keep them moving forward.”

Peter Somogyvari

“Being a mentor on this project gave me unique insight into the fight against climate change and put me in touch a lot of great people who are leading the charge on the latter. Pritam, our mentee, demonstrated excellent analytical and technical skills and a true understanding of the open-source software development principles, which puts him on track to do great things in the future both within and outside of the Linux Foundation/Hyperledger.”

Kamlesh Nagware

“Blockchain interoperability is a key topic this year with many enterprises focusing research on it. Hyperledger Cactus provides decentralized, secure and adaptable integration between blockchain networks. In this mentorship project, the main focus was on using Hyperledger Cactus for carbon accounting and carbon credit tokenization to support the blockchain-carbon-accounting project, a Hyperlegder Lab from the Climate Action SIG. Completion of this project shows that interoperability is not just a theory but can be achieved with the right design architecture and approach. Thanks to our mentee, Pritam Singh,  for a wonderful job completing this project. And, in the last, thanks to my co-mentors Peter Somogyvari, Cactus Maintainer, for his support and to Si Chen for the proposing this mentorship project.”

A special thanks to the Hyperledger member companies for funding this important program. To learn more about our Hyperledger Mentorship Program and how you can participate in our next cohort, head over to our program overview page on the Hyperledger wiki.

Dec 14
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MineHub and KrypC Leverage the Power of Hyperledger Fabric 2.2 to Transform Mining and Metals Supply Chain

By Hyperledger Blog, Hyperledger Fabric, Member Case Study, Supply Chain

Read the full case study here.

Nearly 1.8 trillion USD of metals and minerals move across the world every year from mines, through ports, along transport lines, to processing plants and, ultimately, to the end users. This chain includes hundreds of companies making millions of transactions. Many of these still use manual processes—actual or digital—that require staff resources to process.

MineHub wanted to create a decentralized collaboration platform to solve this problem. The company envisioned a solution that would transform the supply chain workflows and processes for the mining and metals industry. Its solution wouldn’t just improve the practical day-to-day operations. Once in place, this robust, agile platform would help users mitigate damage from unpredictable global disruptions, reduce costs and make more profit due to higher efficiencies and end-to-end visibility of their data.

MineHub was setting out to connect hundreds of companies — from large, international corporations to small, local businesses. Each of these organizations would have unique needs and requirements. To deliver this platform, MineHub realized it needed the power of Private Data Collections (PDCs) that became available with Hyperledger Fabric 2. PDCs deliver critical functionality for bringing together a large group of diverse companies with differing needs and commercial interests and allowing them to exchange business critical data in a secure, private, and scalable manner. They would also need the flexibility to add new organizations and manage them dynamically.

Enter KrypC, a company that understands enterprises that want to work together across interconnected workflows need a single version of truth and that blockchain technology can provide this. From the beginning, KrypC has been focused on leveraging Hyperledger Fabric to build technologies that help enterprises adopt and develop blockchain solutions. The team there was working towards addressing the very challenges MineHub was looking to solve through its Hyperledger Fabric layer 2 platform, KrypCore. After a few discussions, it became clear a partnership between them made sense.

KrypC’s configurable KrypCore platform offers the agility to quickly create and add new functionalities to a decentralized system and to deploy them seamlessly in smart contracts. KrypCore offers a unique and unrivalled approach to performing asynchronous system updates and upgrades amongst a wide variety of users operating on entirely different IT infrastructures. 

With their toolsets, KrypC is able to offer users of decentralized applications a seamless solution to manage security updates and enable rapid addition of new features. By solving for this challenge, MineHub was able to redirect their focus on the user functionality and business value they wanted to unlock for its customers.

Hyperledger Foundation worked with KrypC and Minehub on a case study that details the business and technical challenges of building a platform that connects thousands of companies of diverse sizes without prior relationships and the roles each company plays in the solution. In addition, the case study delves into why and how the release of Hyperledger Fabric 2.2 was key to getting the MineHub to market and what comes next for the supply chain platform.

Read the full case study here.

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