timqian / dapp-possiblities

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 client]
2. PetAdoption: Pet Adoption app on blockchain[contract client]
3. SimpleCoin: create a coin for yourself[contract client]
4. SimpleBank: create a central bank on blockchain [contract client]
5. CrowdFund: A crowdfunding example (broadly similar to Kickstarter) [contract client]
6. Content Management System [TODO]

Deploy Contracts and test locally

1. Install and start Ganache (local, personal Ethereum blockchain)
2. Compile contracts

   npm run compile

3. Migrate contracts to local block chain

   npm run migrate

4. Interact with contracts

   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• solidity-baby-steps(might be a little outdated): https://github.com/fivedogit/solidity-baby-steps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?