Hyperledger Fabric is a platform for blockchain distributed ledger solutions based on a modular architecture that provides high degrees of confidentiality, flexibility and scalability. It is designed to support pluggable implementations of various components and adapt to the complexities present throughout the economic ecosystem. Persian Elite experts recommend that first-time users start by reviewing the rest of the introduction below to familiarize themselves with how blockchain works and the specific features and components of Hyperledger Fabric.

When you’re ready, or if you’re already familiar with Blockchain and Hyperledger Fabric, go to Getting Started, install, and check out demos, specs, APIs, and more.

In the continuation of this article from Persian Elite, we will briefly examine the blockchain and answer the question of what Hyperledger Fabric is.

What is blockchain?

At the heart of a blockchain network is a distributed ledger that records all transactions that take place on the network.

The blockchain ledger is often described as decentralized because it is spread across many network participants, each of whom collaborates in maintaining it. We will see that decentralized institutions and collaboration are powerful features that mirror the way businesses exchange goods and services in the real world.

In addition to being decentralized and collaborative, the information recorded on a blockchain is append-only and uses cryptographic techniques that ensure that once a transaction is added to the ledger, it cannot be altered. This “immutability” feature makes it simple to determine the origin of information because participants can be sure that the information has not been changed after the fact. This is why blockchains are sometimes described as proof-of-concept systems.

To support the constant updating of information and enable a set of ledger functions (transactions, research, etc.), a blockchain network uses smart contracts to provide controlled access to the ledger.

Smart contracts are not only a key mechanism for encapsulating information and keeping it simple across the network, but they can also be written to allow participants to automate certain aspects of transactions.

In other articles from Persian Elite, full explanations are given about blockchain, smart contracts and consensus. For now, it is enough to think of blockchain as a shared, iterative transaction system that is updated through smart contracts and continuously coordinated through a shared process called consensus.

What is Hyper Ledger Fabric?

The Linux Foundation established the Hyperledger project in 2015 to advance cross-industry blockchain technologies. Instead of announcing a single blockchain standard, it introduced a collaborative approach to developing blockchain technologies through a social process, with intellectual property rights that encourage the explicit development and adoption of key standards over time.

Hyperledger Fabric is one of the blockchain projects in Hyperledger. Like other blockchain technologies, it has a ledger, uses smart contracts, and is a system by which participants manage their transactions.

Where Hyperledger Fabric separates from some other blockchain systems is that it is private and permissioned. Rather than an open, permissionless system that allows unknown identities to participate in the network (requiring protocols such as “proof-of-work” to verify transactions and secure the network), members of a Hyperledger Fabric network must register through a membership service provider. Trust (MSP) sign up.

Hyperledger Fabric also offers several pluggable options. Ledger data can be stored in multiple formats, consensus mechanisms can be moved in and out, and different MSPs are supported.

Hyperledger Fabric also provides the ability to create channels that allow a group of participants to create a separate ledger of transactions. This is a very important option for networks where some of the participants may be competitors and do not want anyone to know the special price they are offering to some of the participants.

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Hyper ledger fabric model

This section outlines the key design features woven into the Hyperledger Fabric, which delivers on its promise of a comprehensive yet customizable enterprise blockchain solution:

1. Assets: Allows the exchange of almost anything of monetary value on the network, from Whole Foods to antique cars and currency futures.
2.  Chaincode: The implementation of chain code is segmented from the order of transactions, limits the required levels of trust and verification in all types of nodes (nodes) and optimizes the scalability and performance of the network.
3. Ledger Features: The immutable, shared ledger encrypts the entire transaction history for each channel and includes SQL lookup capabilities such as efficient auditing and dispute resolution.
4. Privacy: Private channels and data sets enable private and confidential multilateral transactions, which are typically required for competing businesses and regulated industries that exchange assets on a shared network.
5. Security and membership services: Authorized membership provides a trusted blockchain network, where participants know that all transactions can be identified and tracked by authorized regulators and auditors.
6. Consensus: A unique approach to consensus enables the flexibility and scalability required by the enterprise. In distributed ledger technology, consensus has recently become synonymous with a specific algorithm, within a single function.

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How does HyperledgerFabric work?

The Hyperledger Fabric network consists of unique organizations (or members) that interact with each other in the network. For example, an organization can be a bank in a network of financial institutions or a shipping partner in a supply chain network. From the perspective of fabric components, each organization has a Fabric certificate authority and one or more peer nodes.

The fabric network also has an order service that is shared by all network organizations and helps process network transactions. In the continuation of this article from Persian Elite, we will share more details about each of these concepts and components:

An organization in a network is defined by a basic certificate specific to that organization. Users and other components (such as peer nodes) in that organization are also identified by certificates, and these certificates are derived from this base certificate, ensuring that other organizations on the network can connect the user to their organization. These certificates also specify permissions such as read-only access versus full access on a channel for each entity on the network.

A root or root certificate for an organization is stored in the Fabric Certificate Authority (CA). Fabric CA also issues certificates to users of an organization and performs other related operations. An enterprise-grade CA Fabric uses different components and can be deployed in different ways using a Hardware Security Module (HSM) to protect the root certificate.

An organization also creates one or more peer nodes as components to perform operations on behalf of that organization. Specifically, a peer node validates proposed transactions on the network, stores and executes smart contract code (known in Fabric as blockchain code), and stores a local copy of the ledger for access. Fabric clients typically interact with peer nodes to read the ledger, add new chaincode to the network, or propose a new transaction. A peer node usually runs on its own computer.

Finally, a network fabric also includes an ordering service that is shared by all network members. The ordering service ensures that new transactions on the network are properly ordered into new blocks and have the appropriate confirmations. The ordering service then broadcasts a new block of transactions to peer nodes in each organization. Peer nodes update their local version of the ledger with this new block.

Hyper LedgerFabric transaction flow

1. A transaction flow begins when a client application sends a transaction proposal to a peer in any organization for approval.
2. Peers verify the identity and authority of the sending client to send the transaction. They then simulate the result of the proposed transaction and, if it matches what was expected, send a confirmation signature to the client.
3. The client collects confirmations from peers and sends the transaction to the ordering service after receiving the appropriate number of confirmations defined in the confirmation policy.
4. Finally, the ordering service checks whether the transaction has the appropriate number of confirmations to satisfy the confirmation policy. It then sorts the confirmed transactions chronologically and packs them into blocks and sends these blocks to peer nodes in each organization. Peer nodes receive new blocks of transactions from the ordering service and then perform final validation for the transactions in that block. Once completed, the new block is added to the ledger and the ledger status is updated. New transactions are now done.

Advantages of Hyper Ledger Fabric

• open source

The Hyperledger Fabric platform is an open source blockchain framework hosted by the Linux Foundation. It has an active and growing community of developers.

• Allowed

HyperledgerFabric networks are permissioned, meaning that all participating member identities are known and authenticated. This advantage is particularly useful in industries such as healthcare, supply chain, banking and insurance where data cannot be exposed to unknown entities. For example, an insurance company on a Hyperledger Fabric blockchain network could share customer claim data with authorized parties to protect customer privacy.

• Governance and access control

Fabric networks consist of channels that are a private “sub-network” of communication between two or more specific network members, network members can transact privately and confidentially. Each transaction in the blockchain network is executed in a channel where each party must be authenticated and authorized to perform transactions in that channel. This provides an additional layer of access control and is particularly useful when members want to limit data exposure, for example when competitors are on the same network. Fabric also provides a set of private data collection features where access to given transactions in a channel can be limited to a subset of participants.

• Performance

Hyperledger Fabric is built to support enterprise-level use cases and can support fast transaction speeds from its consensus mechanism because Fabric is a permissioned blockchain framework.

final word

As you read in this article from Persian Elite, HyperledgerFabric is a private blockchain framework and is one of the many projects on the Hyperledger blockchain platform. This framework is used as a foundation for developing blockchain-based applications, networks, and more. Fabric is designed to create private blockchains that can be used within a single organization or a group of peer organizations that are linked to other blockchain implementations. Hyperledger Fabric is poised to make a splash in the world of enterprise networking with the goal of developing a highly scalable, permissioned and secure framework that supports blockchain distributed ledger technology. Fabric is currently being used at the center of some incredible industrial projects.