Fabric v1 Alpha (Available March-16-2017)
The alpha release is to utilize the basic functions in the Fabric, see and understand the flow of the new v1.0 architecture and start writing applications and chaincode. For details regarding the capabilities, see the documentation.
The following is a high level look at what you can do out of the box:
Docker images for easy deployment for Hyperledger-fabric 1.0.
Docker images will be available for all major components to run a network (peers, solo orderer, CLI, CA, Kafka, CouchDB). A "Getting started"
section will be available in the publications. The end to end flow
will help anyone easily start the network, run a simple application, and learn the basics of running fabric 1.0.
Multiple membership, using the provided fabric-ca, or bring your own. Membership services authenticates, authorizes, and manages identities for a permissioned blockchain network. Membership services code runs in peers and orderers and both authenticates and authorizes blockchain operations utilizing a PKI-based implementation. Fabric-CA provided is an implementation of membership services, handling the issuance and revocation of enrollment certificates (enrollment certificate is a long term identity credential). Only verified member can create asset tokens, allowing a number of transaction certificates to be issued through parent enrollment certificates with a guarantee that the private keys of asset tokens can be regenerated if lost. Issuers are also able to revoke transaction certificates or designate them to expire within a certain time frame, allowing great control within a network. Tcerts allow for role based transactions to occur. TCERTs also helps offer unlikability of transactions. Along with membership services, Hardware Security Module(HSM) is supported to help increase safeguarding of keys.
Endorsement policy with boolean functions (and/or). Chaincode applications have corresponding endorsement policies, where specific peer nodes execute a transaction and return a YEs/NO response to the client. Policies could require a transaction to be endorsed by a minimum number of endorsing peers, a minimum percentage of encorsing peers, or by all endorsing peers assigned to a specific chaincode application.
Consensus is defined as the full-circle verification of the correctness of a set of transactions comprising a block. Ordering support service includes Solo and Kafka. With Crash Fault Tolerance ordering service (ie Kafka), there is ability to add and remove ordering service nodes and create channels. See further information on Consensus
A channel is a private blockchain overlay on a consortia blockchain network, allowing for data isolation and confidentiality. A channel specific ledger is enacted per channel creation. See further information on Channels
A peer is a network entity that maintains a ledger and runs chaincode containers to perform read/write
operations to the ledger. Peers can be dynamically added to and removed from the network.
Peer scalability. Message dissemination using gossip protocal where peers manage discovery and channel membership, disseminates ledger data across all peers on channel, and syncs the ledger state across all peers on the channel.
is a sequenced, tamper resistant record of all state transactions in the fabric. State transactions are a result of chaincode invocations submitted by participating peers. There is one ledger per channel. Each peer maintains a copy of the ledger for each channel, where ledgers support can be done through LevelDB orCouchDB , Rich queries are supported if using CouchDB as the state database
Modular and pluggable component. Clear interfaces were defined for membership services, SDK, Peer, Endorsement, consensus service, and ledger. This provides the opportunity for individuals, startup, or enterprises companies to plug in their own pieces for these various components. As an example, a startup may want to plug in their own authentication and authorization capabilities for membership services instead of fabric ca, or a company may want to plug in other encryption algorithms based on country requirements.
For a list of known bugs
Previous release notes: