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The Hyperledger Foundation is an open source collaborative effort hosted by the Linux Foundation and created to advance cross-industry blockchain technologies. Participation is open to all.

Hyperledger Meetup groups have an informal relationship with Hyperledger, and make up a key part of the Hyperledger ecosystem. Participation in a Hyperledger Meetup group is open to anyone--employees of a Hyperledger member company, Hyperledger contributors and developers, and people just passionate about blockchain technology.

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Eventi in programma (4+)

Hyperledger FireFly 1.1 is Here! Deploy apps connecting to multiple chains

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At Hyperledger Global Forum, the Hyperledger FireFly community was pleased to announce the release of version 1.1. This release makes it possible for Hyperledger FireFly users to deploy multiple blockchain applications connecting to multiple chains, including leading public blockchains like Ethereum, Polygon, Avalanche, Optimism, BNB Chain, Arbitrum, Moonbeam, Fantom and more.

In this webinar, Nicko Guyer, Hyperledger FireFly maintainer and Community Lead, will take you through the new functionality in 1.1, including:

  • Web3 Gateway Mode: Use Web3 Gateway Mode to connect to public blockchains including Ethereum, Polygon, Avalanche, Optimism, BNB Chain, Arbitrum, Moonbeam, and Fantom.
  • Public Blockchain Support: Leverage new tools to simplify public use cases, including FireFly Transaction Manager, FireFly Signer, and Enhanced Gateway Support.
  • Consortium Mode: Use Consortium Mode to build multi-party business networks where data needs to be agreed to and shared among the group.
  • Multi-tenant Support: Use new namespace isolation to segregate and configure API security, identity broadcasting, on-chain data indexing, and data sharing.
  • Multiple Instances of Plugins: Use several instances of each type of plugin in a single FireFly node.
  • Pluggable API Security: Enable API Security at several levels and on any service or namespace.

We look forward to seeing you there.

Demonstration of formally verified chaincode generation for Hyperledger Fabric

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We will show some preliminary results of our ongoing work to enable formal specification and verification of HLF chaincode. The proposed methodology consists in using the tool Why3 [1] (and its underneath language WhyML, and third-party SMT solvers) to specify, implement and prove the chaincodes. The tool Why3 then extracts an OCaml chaincode. Finally, we developped OCaml-chaincode-shim [2] to make OCaml chaincodes executable by an HLF peer. We will demonstrate the application of this methodology on a no code development scenario of a workflow supervisor (that could be a critical component of an industrial supply chain traceability system). This scenario starts with an abstract specification of the workflow in a graphical formalism (in the vein of [3]) and ends with a formally verified chaincode living in a HLF testnet.

[1] : Filliâtre, J. C., & Paskevich, A. (2013, March). Why3—where programs meet provers. In European symposium on programming (pp. [masked]). Springer, Berlin, Heidelberg.
[2] :
[3] : Bistarelli, S., Faloci, F., & Mori, P. (2021, November). *. chain: automatic coding of smart contracts and user interfaces for supply chains. In 2021 Third International Conference on Blockchain Computing and Applications (BCCA) (pp. [masked]). IEEE.

Tokenization deep-dive

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In this lecture we try to deep-dive into the world of tokenization, beyond simple fungible and non-fungible tokens.
We will briefly cover the Token Taxonomy Framework and different advanced token types, like:
- hybrid NFT
- composable NFT
- Non-transferable tokens / crypto-badges
- Soulbound tokens (SBT)
- rentable NFT
- tokens with shared or partial ownership
- royalty tokens
- security token standards and initiatives
- tokenized stock
- tokens for recurring subscription models
- etc ..

Building Hyperledger Fabric Smart Contracts using Solidity and the EVM

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Join us for an online technical workshop that looks at how to build smart contracts for Hyperledger Fabric using Solidity and Fabric's Ethereum Virtual Machine (EVM).

The workshop will be run by Jim Sullivan, Chief Technology Officer and Lead Instructor at The Blockchain Academy, and will cover the following topics:

  • Hyperledger Fabric product architecture, including the EVM/Solidity components.
  • Smart Contract Development demo
  • Solidity Smart Contract Examples
  • Why use the EVM for HyperLedger Fabric applications
  • Use Remix for building Smart Contracts
  • Solidity.
  • Data types.
  • Functions and Accessibility, i.e., public, private.
  • Deployment Demonstration
  • Distributed Application (DApp) demonstration
  • Possible Next Steps.

Eventi passati (28)

Foto (87)