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Hyperledger introduction
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- 3. Agenda 1. Who amI? 2. What is a blockchain? 3. Public blockchains vs Private blockchains 4. What is a Hyperledger and Hyperledger Fabric? 5. Hyperledger Fabric Model 6. Use Cases
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- 5. Adrian Hetman Technical Leader/BlockchainDeveloper in Espeo Previously worked at the BAE Systems Applied Intelligence as a Software Developer adrian.hetman@espeo.eu
- 6. What is ablockchain?
- 7. Blockchain Blockchain is adecentralized and distributed ledger that records all the transaction that occur on the network
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- 9. Public Blockchains Anyone inthe world can read this kind of blockchain Anyone can make transactions to the blockchain Anyone can participate in the consensus Examples of public blockchain 1. Bitcoin 2. Ethereum
- 10. Private Blockchains (Consortium) Rightto read the blockchain might be restricted Right to make transactions to the blockchain is restricted to trusted party Consensus process is handled by selected nodes e.g. 12 nodes of different banks Examples of private blockchain 1. Hyperledger Fabric 2. Corda
- 11. Public Pros 1. Public blockchainsare open, everyone can participate 2. Developers have little power of changing the rules of the application Cons 1. High transactions fees 2. Probability of 51% attack
- 12. Private Pros 1. Consortium caneasily change the rules of a blockchain, revert transactions. Etc. 2. Validators are known in the network 3. Transactions are cheaper 4. Privacy Cons 1. It may be considered more centralized than decentralized. 2. More suited for Enterprise
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- 14. Hyperledger foundation Founded in 2015by Linux Foundation Sole purpose of Hyperledger is to advance blockchain technology. Hyperledger is not a single standard, it is a collaboration of the community to create different blockchain technologies
- 15. Hyperledger Fabric 1. Oneof the project from the Hyperledger Foundation 2. Platform for DLT 3. Permissioned blockchain 4. Elastic and extensible architecture
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- 17. Model 1. Nodes 2. Transactions 3.Membership Service Provider 4. Channels 5. Chaincode
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- 19. Client node Client nodesare the end-users of the Hyperledger Fabric network. They can make transactions requests and communicate with the network. Users are using interfaces to communicate with the network e.g. SDKs or CLI
- 20. Peer Node Peers maintainthe state of the ledger and can commit transactions. Peer does not create new blocks but it validates blocks and transactions. Transaction validation is performed by simulating transactions and applying the endorsement policy.
- 21. Ordering Service (OS)node The OS node creates new blocks by ordering the transactions. It provides a shared communication channel to clients and peers, offering a broadcast service for messages containing transactions.
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- 23. Transaction flow Client Peer Peer Peer 1Broadcast Tx to Peers 2 Tx Endorsement Ordering Service 4 Broadcast new block 3SubmitTx
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- 25. MSP MSP generates acertificate for authentication and validation (CA)
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- 27. Channels a.k.a smallblockchains Channels include only the transactions made in that channel Channel can be used to ensure privacy by restricting read access to authorised signatories
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- 29. Chaincode (Smart Contracts) Chaincodeis the Hyperledger implementation of the Smart Contracts. Chaincode enforces the rules for reading/altering the state database information. Chaincode function execution are initiated through a transaction. Chaincode function results can be transmitted to the network peers to update the state of the database information.
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- 31. Maersk Global container shipment tracking Trackingall the containers at different ports using blockchain to avoid fraud
- 32. City management Dubai wantto use blockchain for managing the city
- 33. Thank you! Poznań /Helsinki / San Francisco