IOC

Requirement

• Linux ubuntu 18.04 LST
• Node：8.10.0
• Truffle: 4.1.14
• Truffle-contact：3.0.6
• Express：~4.16.0
• MySQL：2.16.0
• Geth：1.8.14
• Solidity：0.4.24

Installation

You can execute the setup.sh to help you install environment automatically.

geth

• Install

  sudo apt-get install software-properties-common 
  sudo add-apt-repository -y ppa:ethereum/ethereum 
  sudo apt-get update 
  sudo apt-get install ethereum 
  

Node

• Install

  sudo apt-get install nodejs
  

• notice apt-get may meet some problem about update

  sudo apt-get update
  sudo apt-get upgrade
  

MySQL

• Intall

  sudo apt-get install mysql-server
  sudo apt install mysql-client
  sudo apt install libmysqlclient-dev
  

• Inspection installation

  sudo netstat -tap | grep mysql
  

• permit mysql remote access

  sudo vim /etc/mysql/mysql.conf.d/mysqld.cnf
  

  In mysqld.cnf,comment the line of bind-address = 127.0.0.1, then save and quit.

• Authorization

  grant all on *.* to root@'%' identified by 'your passward' with grant option;
  flush privileges;
  

• Restart mysql

  service mysql restart
  

Run Source Code

• install node_modules dependencies

  cd ./IoVProject
  npm install 
  

• run

  cd ./IoVProject/bin
  node www.js
  

access our production on Google Chrome(or other brower) by iPad.

Overview

truffle

• Requirements

  NodeJS 5.0+ recommended. Windows, Linux or Mac OS X

  Truffle also requires that you have a running Ethereum client which supports the standard JSON RPC API (which is nearly all of them). There are many to choose from, and some better than others for development. We'll discuss them in detail in the Choosing an Ethereum client section.

• Installation

  npm install -g truffle
  

• Start project

  truffle init
  

  Once this operation is completed, you'll now have a project structure with the following items:

  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
  

• Compile

  truffle compile
  

  Upon first run, all contracts will be compiled. Upon subsequent runs, Truffle will compile only the contracts that have been changed since the last compile. If you'd like to override this behavior, run the above command with the --alloption.

• Migration

  truffle migrate
  #truffle migrate --reset means 
  

  This will run all migrations located within your project's migrations directory. At their simplest, migrations are simply a set of managed deployment scripts. If your migrations were previously run successfully, truffle migrate will start execution from the last migration that was ran, running only newly created migrations. If no new migrations exists, truffle migrate won't perform any action at all. You can use the --reset option to run all your migrations from the beginning.

• Develop

  truffle develop 
  

  This will look for a network definition called development in the configuration, and connect to it, if available. You can override this using the --network option

truffle contract

Better Ethereum contract abstraction, for Node and the browser.

• Install

  npm install truffle-contract
  

• Set up a new web3 provider instance and initialize your contract

  var provider = new Web3.providers.HttpProvider("http://localhost:8545");
  var contract = require("truffle-contract");
  
  var MyContract = contract({
  abi: ...,
  unlinked_binary: ...,
  address: ..., // optional
  // many more
  })
  MyContract.setProvider(provider);
  

  You now have access to the functions on your contract.

ganache-cli

Ganache CLI, part of the Truffle suite of Ethereum development tools, is the command line version of Ganache, your personal blockchain for Ethereum development.

Ganache CLI uses ethereumjs to simulate full client behavior and make developing Ethereum applications faster, easier, and safer. It also includes all popular RPC functions and features (like events) and can be run deterministically to make development a breeze.

• Installation

  npm install ganache-cli