 leisure fabric myself Reshmi Dixit. So, let us begin the session learning outcome at the end of this session students will be able to analyze business needs of blockchain and they are able to explain architecture of hyper leisure. So, what are lasers? Lasers are the key, lasers are the system of records for a business. Business will have multiple lasers for multiple business networks in which they participate. There are two terminologies related to leisure, transaction and asset transfer on to or of the leisure. For example, Amar gives a car to Anthony that is a simple transaction and the second terminology is contract the condition for a transaction to occur. If Anthony pays Amar money then car passes from Amar to Anthony a simple contract. If car won't start funds do not pass to Amar as decided by third party this is what somewhat complex. Now, why we need blockchain? So, look at this particular pictorial representation customer A records which are available at bank, auditors place regulations records also contain customer A records ensure records. So, where we need to keep all these records at each and every place which is inefficient, expensive and vulnerable. So, here comes a blockchain. We can provide a solution using blockchain. Blockchain laser a shared replicated permissioned laser with a concerns, provenance, immutability and finality. So, no need to keep records at each and every place it will act as a distributed laser. So, that according to the need each and every one will get a record from that place. So, blockchain laser a shared replicated and permissioned laser. So, what are the business requirements? Privacy, trust, smart contracts and shared laser. So, transaction are secure, authenticated and access controls are enabled for granular access only that is privacy. All the transactions are verified and endorsed by trusted relevant parties which is trust. Business logic is embedded within the database and executed to validate and store the transaction that is smart contracts and shared laser append only immutable database shared across the business network. So, these four are the business requirements. Now, let us see what are the properties of a distributed laser. Decentralized, replicated across many participant each of whom collaborate in its maintenance. Information recorded is in append mode only immutable and immutability makes it simple to determine the provenance of the information and these properties make it called as systems of proofs. This is a important term systems of proofs. Now dear all of you please pause the video and try to think how hyper lasers are different from bitcoin. Take a moment or take a couple of seconds. Now check out your answer. So, hyper laser fabric provides identity, bitcoin provides anonymity. Hyper laser fabric selective endorsement while proof of work is present in bitcoin and for hyper laser fabric assets are there and for bitcoin cryptocurrency is there. Now what are the hyper laser fabric key features? It is a private and permission based. Members of the hyper laser fabric enrolls through MSP. MSP means membership service provider. Different MSPs are supported. Laser data can be stored in a multiple formats. Concerns mechanism can be switched in and out. Ability to create channels allowing a group of participant to create a separate laser of transaction. Now check out the characteristic of hyper laser fabric key, privacy and confidentiality, efficient processing and chain code facility. So, privacy and confidentiality, restricted messaging paths that can be used to provide transaction privacy and confidentiality for specific subset of network members. All data including transaction member and channel information on a channel are invisible and inaccessible to any network members does not explicitly access to that channel. Efficient processing, transaction execution is separated from transaction ordering and commitment. Division of labor unburdened ordering nodes from the demands of transaction execution and laser maintenance while peer nodes are freed from ordering workloads. Chain code facility, chain code applications, encode logic that is invoked by special types of transaction on the channel and system chain code is distinguished as chain code that defines the operating params for the entire channel. Now look at here the hyper laser fabric deployment model. Now three things are here. Orderer CA and peer. Orderer certified authority and peers. Customer A application, merchant B application, bank application, insurer applications are running on a single platform which is accessible through peer or for that peer. Now we will see these three components one by one. So, certificate authority, the first component of a fabric laser, registration of identities or connects to LDAP as a user registry, issuance of an enrolment certificate, certificate renewal and revocation and every single operation must be signed with a certificate. So, certificate authority provides a certificate by providing a signature. The second component is a peer. Can update or query the laser one peer can be part of multiple channels. Peer endows the transaction all the peers find each other and synchronize automatically. Peer manages the laser which consists of transaction log and world state. Peer have two roles endoser and committer. So, the peer have two roles and the third component orderer before anything is committed to the laser it must pass through the ordered service. Provides order of transaction it create the blocks for the blockchain. Block size can be based on number of transaction and or timeout value. So, these three are the main component of the fabric laser. Now we will see the fabric model in detail or what are the three things for that hyper laser fabric model. The first one is asset. The exchange of almost anything with monetary value over the network from whole food to antique car to currency futures represented as a collection of key value pairs with state changes recorded as transaction on a channel laser. Assets can be represented in binary and or on for for. The second is chain code defines asset or assets and the transaction instruction for modifying the asset it is business logic. Rules for reading or altering key value pairs or other state database information. Execute against the laser's current state database and are initiate through a transaction proposal. Results in a set of key value writes that can be submitted to the network and applied to the laser on all peers. Now we will see the third that is laser. One laser per channel each pair each pair maintains a copy of the laser for each channel read only queries using a rich query language read only history queries query laser history for a key enabling a data provenance scenario transaction contains signature of every endosing pair and submitted to ordering service. Laser sequence temper resistance record of all state transaction each transaction are a result of chain code invocations asset key value pairs that are committed to the laser as create update or deletes. Comparise of a blockchain to store the immutable sequence record in a block a state database to maintain current fabric state. So, these are the references. Thank you.