About Hyperledger Fabric
Deprecation notice
Consortium networks have been deprecated. This guide is for historical reference.- Privacy for transactions and confidentiality for organization data
- Membership services that allow for permissioned and identifiable network participant enrollment
- A modular architecture that allows customization for particular use cases and trust models.
Consensus
Raft — a CFT consensus implementation in etcd. Hyperledger Fabric uses orderer nodes to form consensus. See Hyperledger Fabric: Raft concepts.Network structure
Hyperledger Fabric has the following foundational components:- Peers
- Certificate Authority (CA)
- Membership Service Provider (MSP)
- Ordering service
Peers
Peers are nodes in a Hyperledger Fabric network. They host ledgers and chaincodes. Each peer has two communication interfaces:- Peer to peer communication that implements gossip data dissemination protocol over TLS
- Node to owner communication implemented as gRPC
Certificate Authority
The Certificate Authority component manages the digital identities of the Hyperledger Fabric network participants. See Hyperledger Fabric: Certificate Authorities.Membership Service Provider
The Membership Service Provider component identifies the network participants, their roles, and access privileges based on the Certificate Authority and by listing the participant identities. See Hyperledger Fabric: Membership.Ordering service
Any transaction in a Hyperledger Fabric network goes through the ordering service before being packaged in a block, distributed to peers, and committed to the ledger by peers. The ordering service consists of orderer nodes. The orderer nodes form the Raft consensus of the network. See Hyperledger Fabric: The Ordering Service.Chaincode
In Hyperledger Fabric terminology, a packaged and deployed smart contract is called a chaincode. See Hyperledger Fabric: Smart Contracts and Chaincode.Service nodes
A Hyperledger Fabric network is deployed with the following service nodes:- Explorer — a node running Hyperledger Explorer. Each organization participating in a Hyperledger Fabric network has its own explorer node deployed.
- Orderer — an ordering service node