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First Steps with Blockchain
- 1. @horeaporutiu Horea Porutiu Developer Advocate, Emerging Tech First Steps with Blockchain
- 2. Agenda @horeaporutiu 1. Blockchain overview 2. Hyperledger overview 3. Demo
- 3. What is blockchain? ⢠Blockchain - a continuously growing list of records, called blocks, which are linked and secured using cryptography. ⢠A digital ledger that is replicated across all network participants @horeaporutiu ⢠Network participants collaborate to maintain the ledger
- 4. Imagine ⢠Walk into your favorite grocery ⢠You have two options $5.99/lb $9.99/lb Farm-raised đ¤ đ¤đ¤ WildVs. @horeaporutiu
- 5. Problem @horeaporutiu Fisherman Processor Distributor Plate ⢠There are so many parties involved ⢠Different parties have different incentives ⢠Hard to trust that your ďŹsh is actually organic Traceability of ďŹsh from ocean to plate
- 6. Traceability @horeaporutiu Fisherman Processor Distributor Plate Insert grocery here Traceability of ďŹsh from ocean to plate
- 7. Trust Trust - ďŹrm belief in the reliability, truth, ability, or strength of someone or something. @horeaporutiu
- 8. Blockchain and trust Blockchain helps establish trust between different participants in a business network @horeaporutiu
- 9. Proof of traceability ⢠What if we can see on a map exactly where the ďŹsh was caught via a sensor? @horeaporutiu
- 10. Proof of traceability ⢠What if we can see the ďŹsh changing hands from ďŹsherman, to processor and so on @horeaporutiu
- 11. Proof of traceability ⢠And then see the journey it took to get to the shelf? @horeaporutiu
- 12. Traceability @horeaporutiu Fisherman Processor Distributor Plate Traceability of ďŹsh from ocean to plate ⢠Every year, 1 in 10 people fall ill and 400,000 die due to contaminated food
- 13. IBM + Walmart = traceability @horeaporutiu http://www-03.ibm.com/press/us/en/pressrelease/53013.wss
- 14. Break @horeaporutiu ⢠Any questions up to this point?
- 15. Shared database? ⢠A common question is: why canât I just use a shared database? ⢠A shared database does not take care of the trust aspect and immutability. @horeaporutiu ⢠You can think of blockchain as a database with some very special characteristics.
- 16. Identify blockchain use-cases ⢠If data is used only by one organization, then itâs most likely not a good use of blockchain @horeaporutiu Distributed Ledger Distributed Smart ContractsImmutable Share data across multiple companies Permanent record of transactions No central point of ownership Business rules visible to all members
- 17. Problem Bank records Party Aâs records Party Câs records Auditor records Party Bâs records Party Dâs records ⢠Todayâs business networks: inefďŹcient, expensive, vulnerable @horeaporutiu
- 18. Solution Bank records Party Aâs records Party Câs records Auditor records Party Bâs records Party Dâs ⨠records Shared, replicated, permissioned ledger @horeaporutiu ⢠Blockchain beneďŹts: consensus, provenance, immutability, and ďŹnality
- 20. Types of blockchain Public Private @horeaporutiu ⢠Open to anyone ⢠Large computational requirement ⢠Participants incentivized with cryptocurrency ⢠Bitcoin ⢠Need permission to join the network ⢠Walmart solution ⢠Less computational power required ⢠Cryptocurrency is typically not involved ⢠Transactions can be kept private
- 21. Smart Contracts ⢠Rules agreed by all parties within a network before the genesis block ⢠Provide controlled access to ledger ⢠Can execute automatically @horeaporutiu
- 22. Consensus ⢠Process to keep all ledgers on the network consistent ⢠Ensures all participants have same transactions in the same order â˘Implementation varies @horeaporutiu
- 23. Break @horeaporutiu ⢠Any questions up to this point?
- 24. Linux Foundation ⢠Helps host Node.js, Linux, and Kubernetes projects ⢠Open source ⢠Dev cost of projects = $16Billion @horeaporutiu
- 25. Hyperledger Fabric ⢠Framework of Hyperledger project ⢠Write smart contracts â˘Collaborative effort to advance cross-industry blockchain technologies @horeaporutiu
- 27. Hyperledger Composer ⢠A tool that works on top of Hyperledger Fabric ⢠Allows for smart contracts to be written in Javascript! @horeaporutiu
- 28. Hyperledger Composer Architecture @horeaporutiu Model File .cto Access Control .acl Script File .js Assets, participants, and transactions Transaction functions Access Control Rules Business Network Packaged business network deďŹnition Archive .bna Hyperledger Fabric Cloud/local Browser/Node.js Online
- 30. Starting Hyperledger Fabric Locally @horeaporutiu
- 31. Deploy Business Network Archive @horeaporutiu
- 32. Start the Web UI @horeaporutiu
- 33. Explore the Composer ďŹles @horeaporutiu
- 34. Sell item on auction! @horeaporutiu
- 35. What we learned ⢠Why is blockchain important? ⢠Immutability, smart contracts, consensus ⢠Hello world with Hyperledger Composer @horeaporutiu
- 36. Resources ⢠Link to the code pattern I demoed: https:// github.com/IBM/BlockchainNetwork- CompositeJourney Thanks Ishan for writing this! ⢠Installing Hyperledger Composer locally: https:// hyperledger.github.io/composer/next/installing/ installing-index @horeaporutiu ⢠Hyperledger Composer Sandbox: https:// composer-playground.mybluemix.net/
- 37. Contact ⢠Questions: horea.porutiu@ibm.com ⢠Social: Tweets @horeaporutiu ⢠Site: https://horeaporutiu.github.io/ @horeaporutiu