https://github.com/amazingandyyy/practical-dapp

A Collection of Some Practical Ethereum DApp Projects.
https://github.com/amazingandyyy/practical-dapp

blockchain dapp ethereum ethereum-contract ethereum-dapp nextjs react smart-contracts solidity web3

Last synced: 23 days ago
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A Collection of Some Practical Ethereum DApp Projects.

• Host: GitHub
• URL: https://github.com/amazingandyyy/practical-dapp
• Owner: amazingandyyy
• Created: 2018-04-13T20:32:20.000Z (over 6 years ago)
• Default Branch: master
• Last Pushed: 2018-06-04T04:54:22.000Z (over 6 years ago)
• Last Synced: 2024-10-12T18:51:21.758Z (about 1 month ago)
• Topics: blockchain, dapp, ethereum, ethereum-contract, ethereum-dapp, nextjs, react, smart-contracts, solidity, web3
• Language: JavaScript
• Homepage: https://amazingandyyy.com/ether-dev/
• Size: 5.39 MB
• Stars: 3
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Ether Development

## Notes

### Data type

- string

- bool

- int, int8, int16, int32, int256

- uint

- fixed/ufixed

- address

- fixed array, int[3]

  - use function to return a whole array

- dynamic array, int[]

- mapping, mapping(address => string)

- struct

```javascript

struct Kitty {

  address owner;

  int: price;

}

```

## Function Types

- public

- private, tell developer that only the contract can call the funtion, but not for security purpose

- view/constant

- pure

- payable

## web3 interface

```javascript

const web3 = new Web3(provider);

web3.utils.toWei('0.01', 'ether');

let someoneBalance = await web3.eth.getBalance(accounts[0]);

```

### Global Variables

- mgs.data

- msg.gas

- msg.sender

- msg.value, in wei

- ether

- block.defficulty

- now (time)

- this.balance

## Global Functions

- require

- sha3, keccak256

- address.transfer()

## Default value

- string to ""(empty string)

- bool to false

- uint to 0

- msg.value are in wei

## Resource

[Ethereum and Solidity: The Complete Developer's Guide](https://www.udemy.com/ethereum-and-solidity-the-complete-developers-guide/learn/v4/)