Hyperledger is an open source project from the Linux Foundation that develops blockchain frameworks. It includes distributed ledger projects like Fabric and Sawtooth, as well as libraries, tools, and domain-specific projects. Hyperledger Fabric is an enterprise-grade distributed ledger that uses smart contracts in common programming languages. It has a permissioned network where participants are known and authenticated through a membership service provider. Identity services manage member identities and roles to control access privileges on the network.

1. HYPERLEDGER

2.  Hyperledger is not a blockchain but a project
initiated by Linux Foundation to advance
blockchain technology
 There are four categories of projects under
Hyperledger
1)Distributed ledgers
2)Libraries
3)Tools
4)Domain specific

3. Distributed Ledger Projects
 Fabric
 Sawtooth
 Indy
 Iroha
 Besu

4. 2)Libraries
 Aries
 Transact
 Ursa
 AnonCreds Project

5. Tools
 Cello
 Caliper
 Composer
 Explorer
Domain-Specific
 Grid

6. REFERENCE ARCHITECTURE

8.  Identity services manages identities of entities,
participants and ledger objects such as assets
and smart-contracts.
 Policy services manages access control, privacy,
consortium rules, consensus rules, etc.
 Blockchain and Transaction layer have many
modules which help in maintaining the
Blockchain state

9.  P2P protocol module provides different
mechanisms which are compatible with
present internet architecture to carryout peer
to peer functionalities like bidirectional
streaming,flow control and connects one peer
to another
 Distributed ledger is present in this layer
which provides for maintaining the state of
the blockchain,processing and validation of
transactions,maintaining the objects of the
ledgers

10.  Consensus module is to run the consensus
mechanisms to validate transactions in the
network.
 Finally, we have the smart contracts layer,
which provides chaincode services in
Hyperledger and makes use of secure
container technology to host smart contracts.

11.  Hyperledger fabric follows an approach where peers
validate transactions submitted by the end-user.
 The validated transaction is submitted to the
orderer; the orderer would further validate the
order, especially to avoid double-spending.
 Orderer orders transactions for a block and approves
the block creation, following which peers on the
blockchain are notified via gossip protocol.
 All peers validate the order and make a new block
in the chain

12. MULTIVERSION

13. Components of Hyperledger Fabric
 Hyperledger Fabric is an open source enterprise-
grade permissioned distributed ledger technology
(DLT) platform,

14.  Fabric is the first distributed ledger platform
to support smart contracts authored in
general-purpose programming languages such
as Java, Go and Node.js, rather than
constrained domain-specific languages (DSL).
 The Fabric platform is also permissioned,
meaning that, unlike with a public
permissionless network, the participants are
known to each other,

15.  Hyperledger, being a permissioned ledger
system, is used to authenticate a node by
using a mechanism called Membership Service
Provider.

16.  [First is identity, that provides authorization,
identification, and authentication services under
membership services.
 It defines which CA is trusted to define members in
the network
 It not only defines who can be on the network but
also defines their roles and sets access privileges to
each member of the network so as to who can
access what inside the network.]