Blockchain - Introduction and Authoring Smart Contracts
5 likes1,145 views
This document provides an agenda and overview of blockchain and smart contracts. The agenda includes an introduction to smart contracts, Test RPC and Geth, Truffle, and Dapps. It discusses what blockchain and smart contracts are, different types of blockchains like public, private and consortium, and development tools for Ethereum like Mist browser, Truffle framework, and how to build decentralized applications (Dapps) using Web3.js.
Blockchain - Introduction and Authoring Smart Contracts
- 1. 1 Vikas Grover vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain www.meetup.com/Blockchain-Revolution Blockchain & Authoring Smart Contracts
- 2. 2 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Agenda ● Introduction ● Smart Contracts ● Test RPC and Geth ● Truffle ● Dapp
- 3. 3 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Introduction Blockchain creates a permanent, digitized chain of transactions, grouped in blocks, allowing virtually anything of value to be tracked and traded, without requiring a central point of control Blockchain is a peer-to-peer distributed ledger technology for a new generation of transactional applications.
- 4. 4 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain What is in Block Header, Transaction Count, Block Content Transaction Input Output
- 5. 5 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Public, Private, Consortium/Hybrid First thing First – Do you even need a Blockchain? ● Database with Shared Access ● Who Controls the Functionality? ● Public or Private Transactions? ● Determining Consensus?
- 6. 6 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Public, Private, Hybrid ● Public Blockchain: Fully Public, Secured by Cryptocurrencies (Proof of work, Proof of Stake etc), Its for Anyone – Read, Send Transactions, Participate in Consensus Process ● Private Blockchain: Controlled Access, Write permissions are kept centralized to one organization, Read permissions may be public or not (or some part may be public) ● Consortium/Hybrid Blockchain: Pre-selected set of nodes for eg: 15 financial institutions
- 7. 7 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Public, Private, Hybrid Public Blockchain ● Freedom ● Neutrality ● Openness Private Blockchain ● Known Validator (51% risk goes away) ● Cheaper Transactions ● Privacy No way that there is going to be One way to do Blockchain
- 8. 8 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Bitcoin – Digitally Signed
- 9. 9 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Ethereum ● Founder of Ethereum - Vitalik Buterin (22 year old) won the 2014 World Technology Award for invention of Blockchain. ● Ethereum to build programming tools to make Blockchain power any/everything. ● Ethereum is Dynamic and Programmable. You can implement the way you want. For eg: Using Java Script you can implement almost anything.
- 10. 10 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain What is Better with Ethereum
- 11. 11 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Smart Contract Smart contracts are computer protocols that facilitate, verify, or enforce the negotiation or performance of a contract, or that make a contractual clause unnecessary. Smart contracts usually also have a user interface and often emulate the logic of contractual clauses. Trust the Bank Trust the Code
- 12. 12 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Smart Contract – Online Browser
- 13. 13 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Smart Contract – Mist
- 14. 14 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Different Needs Different Clients ● When Developing ● Ethereum JS TestRPC ● When Deploying: ● Geth ● Webthree ● Others
- 15. 17 TRUFFLE
- 16. 18 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Truffle What is Truffle ● Development Environment ● Testing Framework ● Asset Pipeline
- 17. 19 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Truffle What do you get with Truffle ● Built-in smart contract compilation, linking, deployment and binary management. ● Automated contract testing with Mocha and Chai. ● Configurable build pipeline with support for custom build processes. ● Scriptable deployment & migrations framework ● Network management for deploying to many public & private networks. ● Interactive console for direct contract communication ● Instant rebuilding of assets during development. ● External script runner that executes scripts within a Truffle environment. ● Support for JavaScript, SASS, ES6 and JSX built-in.
- 18. 21 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Getting Started with Truffle ● Getting Started ● Install Truffle ● Commands ● mkdir myproject ● cd myproject ● truffle init ● app ● contracts ● migrations ● test ● truffle.js ● truffle compile
- 19. 22 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Testing with Truffle ● Automated Testing ● Mocha ● Assertion ● Chai ● All test files should be located in the ./tests directory. Truffle will only run test files with the following file extensions: .js, .es, .es6, and .jsx. All other files are ignored.
- 20. 23 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Interacting with SmartContract ● Use Web3 ● Little Difficult though ● Use Ether Pudding ● Chai ● All test files should be located in the ./tests directory. Truffle will only run test files with the following file extensions: .js, .es, .es6, and .jsx. All other files are ignored.
- 21. 24 Dapp
- 22. 25 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Dapp ● Frontend and Backend ● Reactive Programming – callback functions ● Web3.js ● version ● api ● node/getNode ● network/getNetwork ● ethereum/getEthereum ● whisper/getWhisper ● isConnected() ● setProvider(provider) ● CurrentProvider ● Etc etc etc
- 23. 26 vgrover1515@gmail.com Offline Slack Channel : www.tinyurl.com/letsdoblockchain Thanks