window10搭建区块链开发环境

1，warning：No visibility specified. Defaulting to "Public"

解决方案：在函数后面returns前面添加“public”关键词

2， Warning: Function state mutability can be restricted to pure
  function Hello() public returns (string) {

解决方案：如果编译完成，只是warning，忽略掉。

3，Error: No network specified. Cannot determine current network.

解决方案：修改truffle.js文件

module.exports = {

networks: {
        development: {
            host: "localhost",
            port: 8545,
            network_id: "*" // 匹配任何network id
         }
    }

};

4，Could not connect to your Ethereum client. Please check that your Ethereum client:

解决方案：是由于没有打开客户端导致的，在Node.js command promote 输入testrpc启动测试环境

参考文献

1，http://liyuechun.org/2017/09/19/how-to-code-smart-contract/

2，http://blog.youkuaiyun.com/atnice/article/details/79030770