dapp-possiblities:探索dapp的可能用法

## Folder structure - `contracts/`: stores contracts - `clients/`: stores clients interacting with contracts - `migrations/`: stores scripts used to deploy contracts to eth blockchain ## Applications 1. SimpleStorage: Store and manipulating a value on blockchain [[`contract`](./contracts/01_SimpleStorage.sol) [`client`](./clients/01.js)] 2. PetAdoption: Pet Adoption app on blockchain[[`contract`](./contracts/02_PetAdoption.sol) [`client`](./clients/02.js)] 3. SimpleCoin: create a coin for yourself[[`contract`](./contracts/03_SimpleCoin.sol) [`client`](./clients/03.js)] 4. SimpleBank: create a central bank on blockchain [[`contract`](./contracts/04_SimpleBank.sol) [`client`](./clients/04.js)] 5. CrowdFund: A crowdfunding example (broadly similar to Kickstarter) [[`contract`](./contracts/05_CrowdFund.sol) [`client`](./clients/05.js)] 6. Content Management System [TODO] ## Deploy Contracts and test locally 1. Install and start [Ganache](https://truffleframework.com/ganache) (local, personal Ethereum blockchain) 1. Compile contracts ```bash npm run compile ``` 1. Migrate contracts to local block chain ```bash npm run migrate ``` 1. Interact with contracts ```bash npm run -- exec clients/01.js npm run -- exec clients/02.js ... ``` ## Sample DAPPs on the main chain - DAPP collection website: https://www.stateofthedapps.com/rankings - oracle and prediction market: https://www.augur.net/ - Job Market Platform: https://ethlance.com/ ## Good Readings - Useful Ðapp Patterns: https://github.com/ethereum/wiki/wiki/Useful-%C3%90app-Patterns - Web compiler `remix`: https://remix.ethereum.org/#version=builtin&optimize=false - Official solidity doc: http://solidity.readthedocs.io/en/v0.4.24/introduction-to-smart-contracts.html - Learn X in Y minutes solidity: https://learnxinyminutes.com/docs/solidity/ - web3 api: https://github.com/ethereum/wiki/wiki/JavaScript-API - Awesome eth: https://github.com/btomashvili/awesome-ethereum - About security: https://github.com/ConsenSys/smart-contract-best-practices/blob/master/README-zh.md - Other p2p solutions: https://github.com/kgryte/awesome-peer-to-peer - solidity-baby-steps(might be a little outdated): https://github.com/fivedogit/solidity-baby-steps ## Ideas ### Make writing dapp as easy as possible better than truffle 1. Write contract 2. Compile and deploy 3. Interact with contract Is migrations script necessary? compilers: web3; http://solidity.readthedocs.io/en/v0.4.24/installing-solidity.html#solcjs ### Decentrialized Github ## Questions and Answers How to host content/app freely on decentrialized network? Currently facebook/github provide free content host and store, because they can get profit by ads etc to cover the cost. But on blockchain, hosting any content cost money, free users are a giant group, Is it possible to win them to blockchain?