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20180714 workshop - Ethereum decentralized application with truffle framework
This document discusses Ethereum development tools and concepts. It begins by outlining upcoming events focused on Ethereum accounts, the Truffle framework, and decentralized apps. It then describes development environments using Remix, MetaMask, Solidity, and Ganache. It explains Ethereum accounts, including externally owned accounts and contract accounts. It covers using Truffle for compiling, deploying, testing, and interacting with smart contracts. Finally, it provides an overview of building a pet shop decentralized app.
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20180714 workshop - Ethereum decentralized application with truffle framework
- 2. Next event 1. Ethereum-Externally owned accounts (EOAs) / Contract accounts 2. Truffle framework 3. Dapps - Pet shop
- 3. Dev environment • IDE– Remix • Dapp browsers– MetaMask • Smart Contract Language - Solidity • Simulator - ganache-cli REMIX Ethereum Blockchain
- 4. Dev environment • IDE– Visual Studio Code • Framework – NodeJS • Dapp browsers– MetaMask • Smart Contract Language - Solidity • Test Framework – Mocha/Chai • Simulator - ganache-cli • Library – Web3.js • Smart contract framework – Truffle
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- 6. Ethereum account • State •Accounts • Contracts Accounts (controlled by code) • Address • Balance • Ether • Externally Owned Accounts (EOAs: User accounts is controlled by private keys) • Address • Balance • Ether Contract account <code> <code> <code> External owned account
- 7. Ethereum account • Hasan address • Private key protected by password • Has an address but NO private key • Hold/Run code • Associated with accounts(s) • Lists incoming transactions Contract account <code> <code> <code> External owned account
- 8. Ethereum account • Accountstate • nonce: If the account is an externally owned account, this number represents the number of transactions sent from the account’s address. • balance: The number of Wei owned by this address. There are 1e+18 Wei per Ether. storageRoot: A 256-bit hash of the root node of a Merkle Patricia tree that encodes the storage contents of the . • codeHash: The hash of the EVM (Ethereum Virtual Machine) code of this account .
- 9. Contracts Accounts- Prosand cons • Pros • Contract account can list incoming transactions • Contract account can be setup as Multisig Accounts • A Multisig Account can be structured such that it has a daily limit which you specify, and only if the daily limit is exceeded will multiple signatures be required • Cons • Contract accounts incur a cost whenever you use them. • Contract accounts can’t initiate new transactions on their own.
- 10. Contracts Accounts- Bank •What does Bank to do ? • Deposits • Withdrawals • Balance Check
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- 14. Contracts Accounts- Bank •Step 1. Withdraw 10 wei 2. Click “balance” withdraw
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- 16. Truffle Framework • Built-insmart contract compilation, linking, deployment and binary management. • Automated contract testing for rapid development. • Scriptable, extensible deployment & migrations framework. • Network management for deploying to any number of public & private networks. • Package management with EthPM & NPM • Interactive console for direct contract communication. • Configurable build pipeline with support for tight integration. • External script runner that executes scripts within a Truffle environment.
- 17. Truffle Framework 1. Creatinga project 2. Exploring the project 3. Testing 4. Compiling 5. Migrating with Ganache 6. Interacting with the contract
- 18. Truffle- Directory structure •contracts/:Directory for Solidity contracts •migrations/: Directory for scriptable deployment files •test/: Directory for test files for testing your application and contracts •truffle.js: Truffle configuration file
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- 20. Links • Remix • https://remix.ethereum.org •Ethereum Wallet • https://wallet.ethereum.org • Metamask • https://metamask.io/ • Ganache • http://truffleframework.com/ganache/ • Ganache-cli • https://github.com/trufflesuite/ganache-cli
- 21. Links • Node • https://nodejs.org/en/ •Ganache • http://truffleframework.com/ganache/ • Ganache-cli • https://github.com/trufflesuite/ganache-cli • Visual studio • https://code.visualstudio.com/
- 22. CONTENT THE HUNGRY LAB 22 LynnJamal Community Ambassador 9270 8334 lynn@thecarrotpatch.co
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- 24. CONTENT THE HUNGRY LAB 24 Learning,Sharing, Connecting Step-by-Step Guidance No BS. Honest Support Respect & Inclusivity Entrepreneurship is hard. You don’t have to do it alone. Our Community GUS@thehungrylab.com
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- #25 brand manager – lindsey brassington struggled with weight, health swimmer