Hyperledger

Hyperledger (or the Hyperledger project) is an umbrella project of open source blockchains and related tools, started in December 2015 by the Linux Foundation,[1] and has received contributions from IBM, Intel and SAP Ariba, to support the collaborative development of blockchain-based distributed ledgers.

History and aims

In December 2015, the Linux Foundation announced the creation of the Hyperledger Project. The founding members of the project were announced in February 2016 and ten further members and the makeup of the governing board were announced March 29.[2] On May 19, Brian Behlendorf was appointed executive director of the project.[3]

The objective of the project is to advance cross-industry collaboration by developing blockchains and distributed ledgers, with a particular focus on improving the performance and reliability of these systems (as compared to comparable cryptocurrency designs) so that they are capable of supporting global business transactions by major technological, financial and supply chain companies.[4] The project will integrate independent open protocols and standards by means of a framework for use-specific modules, including blockchains with their own consensus and storage routines, as well as services for identity, access control and smart contracts. Early on there was some confusion that Hyperledger would develop its own bitcoin-type cryptocurrency, but Behlendorf has unreservedly stated that the Hyperledger Project itself will never build its own cryptocurrency.[5]

In early 2016, the project began accepting proposals for incubation of codebases and other technologies as core elements. One of the first proposals was for a codebase combining previous work by Digital Asset, Blockstream's libconsensus and IBM's OpenBlockchain.[6] This was later named Fabric.[7] In May, Intel's distributed ledger, named Sawtooth,[8] was incubated.[9]

In January 2018, Hyperledger released the production-ready Sawtooth 1.0.[10] In January of 2019, the first long-term-support version of Hyperledger Fabric (v1.4) was announced.[11]

Members and governance

Early members of the initiative included blockchain ISVs, (Blockchain, ConsenSys, Digital Asset, R3, Onchain), well-known technology platform companies (Cisco, Fujitsu, Hitachi, IBM, Intel, NEC, NTT DATA, Red Hat, VMware), financial services firms (ABN AMRO, ANZ Bank, BNY Mellon, CLS Group, CME Group, the Depository Trust & Clearing Corporation (DTCC), Deutsche Börse Group, J.P. Morgan, State Street, SWIFT, Wells Fargo, Sberbank), business software companies like SAP, academic institutions (Cambridge Centre for Alternative Finance, Blockchain at Columbia, UCLA Blockchain Lab), systems integrators and others (Accenture, Calastone, Wipro, Credits, Guardtime, IntellectEU, Nxt Foundation, Symbiont, Smart Block Laboratory).[12]

The governing board of the Hyperledger Project consists of twenty members chaired by Robert Palatnick, (managing director and chief technology architect for DTCC), and a twelve-member Technical Steering Committee chaired by Dan Middleton, Principal Engineer at Intel.

Notable frameworks

Hyperledger Fabric

Hyperledger Fabric is a permissioned blockchain infrastructure, originally contributed by IBM and Digital Asset, providing a modular architecture with a delineation of roles between the nodes in the infrastructure, execution of Smart Contracts (called "chaincode" in Fabric) and configurable consensus and membership services. A Fabric Network comprises (1) "Peer nodes", which execute chaincode, access ledger data, endorse transactions and interface with applications; (2) "Orderer nodes" which ensure the consistency of the blockchain and deliver the endorsed transactions to the peers of the network; and (3) Membership Service Providers (MSPs), each generally implemented as a Certificate Authority, managing X.509 certificates which are used to authenticate member identity and roles.[13] Hyperledger Fabric allows for use of different consensus algorithms, but the consensus algorithm that is most commonly used with the platform is Practical Byzantine Fault Tolerance (PBFT).[14]

Fabric is primarily aimed at integration projects, in which a Distributed Ledger Technology (DLT) is required, offering no user facing services other than an SDK for Node.js, Java and Go.

Fabric supports chaincode in Go and JavaScript (via Hyperledger Composer, or natively since v1.1) out-of-the-box, and other languages such as Java by installing appropriate modules. It is therefore potentially more flexible than competitors that only support a closed Smart Contract language.

Hyperledger Iroha

Hyperledger Iroha is being used in Cambodia to create a new payment system alongside the National Bank of Cambodia,[15] and in various other projects across healthcare, finance and identity management.

Hyperledger Sawtooth

Originally contributed by Intel, Sawtooth includes a dynamic consensus feature enabling hot swapping consensus algorithms in a running network. Among the consensus options is a novel consensus protocol known as "Proof of Elapsed Time," a lottery-design consensus protocol that optionally builds on trusted execution environments provided by Intel's Software Guard Extensions (SGX).[16] Sawtooth supports Ethereum smart contracts via "seth" (a Sawtooth transaction processor integrating the Hyperledger Burrow EVM).[17] In addition to Solidity support, Sawtooth includes SDKs for Python, Go, Javascript, Rust, Java, and C++.[18]

Hyperledger Besu

Besu is an enterprise-grade Ethereum codebase.[19]

Tools

Hyperledger Caliper

Hyperledger Caliper is a blockchain benchmark tool and one of the Hyperledger projects hosted by The Linux Foundation. Hyperledger Caliper allows users to measure the performance of a specific blockchain implementation with a set of predefined use cases. Hyperledger Caliper will produce reports containing a number of performance indicators, such as TPS (Transactions Per Second), transaction latency, resource utilisation etc. The intent is for Caliper results to be used by other Hyperledger projects as they build out their frameworks, and as a reference in supporting the choice of a blockchain implementation suitable for a user's specific needs. Hyperledger Caliper was initially contributed by developers from Huawei, Hyperchain, Oracle, Bitwise, Soramitsu, IBM and the Budapest University of Technology and Economics.[20]

Hyperledger Cello

Hyperledger Cello is a blockchain module toolkit and one of the Hyperledger projects hosted by The Linux Foundation. Hyperledger Cello aims to bring the on-demand "as-a-service" deployment model to the blockchain ecosystem to reduce the effort required for creating, managing and terminating blockchains. It provides a multi-tenant chain service efficiently and automatically on top of various infrastructures, e.g., baremetal, virtual machine, and more container platforms. Hyperledger Cello was initially contributed by IBM, with sponsors from Soramitsu, Huawei and Intel.[21]

Baohua Yang and Haitao Yue from IBM Research are committed part-time to developing and maintaining the project.

Hyperledger Composer

Hyperledger Composer is a set of collaboration tools for building blockchain business networks that make it simple and fast for business owners and developers to create smart contracts and blockchain applications to solve business problems. Built with JavaScript, leveraging modern tools including node.js, npm, CLI and popular editors, Composer offers business-centric abstractions as well as sample apps with easy to test DevOps processes to create robust blockchain solutions that drive alignment across business requirements with technical development.[22]

Blockchain package management tooling contributed by IBM. Composer is a user-facing rapid prototyping tooling, running on top of Hyperledger Fabric, which allows the easy management of Assets (data stored on the blockchain), Participants (identity management, or member services) and Transactions (Chaincode, a.k.a. Smart Contracts, which operate on Assets on the behalf of a Participant). The resulting application can be exported as a package (a BNA file) which may be executed on a Hyperledger Fabric instance, with the support of a Node.js application (based on the Loopback application framework) and provide a REST interface to external applications.

Composer provides a GUI user interface "Playground" for the creation of applications, and therefore represents an excellent starting point for Proof of Concept work.

Hyperledger Explorer

Hyperledger Explorer is a blockchain module and one of the Hyperledger projects hosted by The Linux Foundation. Designed to create a user-friendly Web application, Hyperledger Explorer can view, invoke, deploy or query blocks, transactions and associated data, network information (name, status, list of nodes), chain codes and transaction families, as well as any other relevant information stored in the ledger. Hyperledger Explorer was initially contributed by IBM, Intel and DTCC.[23]

Hyperledger Quilt

Hyperledger Quilt is a business blockchain tool and one of the Hyperledger projects hosted by The Linux Foundation. Hyperledger Quilt offers interoperability between ledger systems by implementing the Interledger protocol (also known as ILP), which is primarily a payments protocol and is designed to transfer value across distributed ledgers and non-distributed ledgers. The Interledger protocol provides atomic swaps between ledgers (even non-blockchain or distributed ledgers) and a single account namespace for accounts within each ledger. With the addition of Quilt to Hyperledger, The Linux Foundation now hosts both the Java (Quilt) and JavaScript (Interledger.js) Interledger implementations. Hyperledger Quilt was initially contributed by NTT Data and Ripple.[24]

Hyperledger Ursa

Ursa is a modular, flexible shared cryptography library.[25]

See also

References
  1. "Linux Foundation Unites Industry Leaders to Advance Blockchain Technology - The Linux Foundation". The Linux Foundation. 2015-12-17. Archived from the original on 2017-07-17. Retrieved 2018-04-28.
  2. "Open Source Blockchain Effort for the Enterprise Elects Leadership Positions and Gains New Investments - Hyperledger". Hyperledger. 2016-03-29. Retrieved 2018-04-28.
  3. "Founder of the Apache Software Foundation Joins Linux Foundation to Lead Hyperledger Project". 2016-05-19. Archived from the original on 2016-06-10.
  4. "Linux Foundation's Hyperledger Project Announces 30 Founding Members and Code Proposals To Advance Blockchain Technology". 2016-02-09. Archived from the original on 2016-02-25. Retrieved 2016-02-17.
  5. "Hyperledger Blockchain Project Is Not About Bitcoin". eWEEK. Retrieved 2018-04-28.
  6. "Incubating Project Proposal: Joint DAH/IBM proposal". Tamas Blummer, Christopher Ferris. March 29, 2016. Retrieved June 21, 2016.
  7. "hyperledger/fabric". GitHub. Retrieved 2016-06-23.
  8. "hyperledger/sawtooth-core". GitHub. Retrieved 2018-04-28.
  9. "Sawtooth Lake Hyperledger Incubation Proposal". Mic Bowman, Richard Brown. April 14, 2016. Retrieved June 21, 2016.
  10. "Hyperledger releases Hyperledger Sawtooth 1.0, its second distributed ledger project". TechCrunch. Retrieved 2019-05-28.
  11. "Hyperledger Fabric 1.4 marks a very important milestone: First LTS release". JAXenter. 2019-01-11. Retrieved 2019-05-28.
  12. "Our Corporate Members". The Linux Foundation. Retrieved 2019-03-10.
  13. Androulaki, Elli; Barger, Artem; Bortnikov, Vita; Cachin, Christian; Christidis, Konstantinos; De Caro, Angelo; Enyeart, David; Ferris, Christopher; Laventman, Gennady; Manevich, Yacov; Muralidharan, Srinivasan; Murthy, Chet; Nguyen, Binh; Sethi, Manish; Singh, Gari; Smith, Keith; Sorniotti, Alessandro; Stathakopoulou, Chrysoula; Vukolić, Marko; Weed Cocco, Sharon; Yellick, Jason (2018). "Hyperledger Fabric: A Distributed Operating System for Permissioned Blockchains". arXiv:1801.10228. doi:10.1145/3190508.3190538. S2CID 3863072. Cite journal requires |journal= (help)
  14. Salimitari, Mehrdad; Chatterjee, Mainak; Fallah, Yaser. "A Survey of Consensus Methods in Blockchain for Resource-Constrained IoT Networks". Procedia Computer Science. Retrieved 30 October 2020.
  15. Kotoski, Kali. "NBC signs blockchain agreement". phnompenhpost.com. Phnom Penh Post. Retrieved 7 Mar 2019. The technology would bypass the need for ATMs and formal financial institutions for customers by allowing them to send and receive funds directly, while central banks and physical financial institutions could use it for streamlined interbank lending activity, according to Martin Kendrik, the founder of the Cambodian Cryptocurrency, Bitcoin and Blockchain Community.
  16. Bucci, Debbie. "Blockchain and Its Emerging Role in Health IT and Health-related research" (PDF). U.S. Department of Health and Human Services, Office of the National Coordinator for Health Information Technology. Retrieved 18 May 2017.
  17. Bollen, Benjamin. "Introduce a start for Burrow EVM as Sawtooth Transaction Processor". github.com. Hyperledger. Retrieved 18 May 2017.
  18. "Available SDKs". sawtooth.hyperledger.org. Retrieved November 23, 2018.
  19. Castillo, Michael del. "Hyperledger Unanimously Approves First Ethereum Codebase For Enterprises". Forbes. Retrieved 2019-09-26.
  20. "Measuring Blockchain Performance with Hyperledger Caliper - Hyperledger". Hyperledger. 2018-03-19. Retrieved 2018-06-16.
  21. "Hyperledger Cello - Hyperledger". Hyperledger. Retrieved 2018-04-28.
  22. "Hyperledger Composer - Hyperledger". Hyperledger. Retrieved 2018-04-28.
  23. "Hyperledger Explorer - Hyperledger". Hyperledger. Retrieved 2018-04-28.
  24. "Hyperledger Quilt - Hyperledger". Hyperledger. Retrieved 2018-04-28.
  25. "Hyperledger Ursa". Hyperledger. Retrieved 2019-04-02.
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