Truffle 安装依赖

$ truffle install

{
  "package_name": "adder",
  "version": "0.0.3",
  "description": "Simple contract to add two numbers",
  "authors": [
    "Tim Coulter <tim.coulter@consensys.net>"
  ],
  "keywords": [
    "ethereum",
    "addition"
  ],
  "dependencies": {
    "owned": "^0.0.1"
  },
  "license": "MIT"
}