竞选与投票

美图Dpos实现中，所有账户新增了四个操作，分别是：

1. 成为validator
2. 退出validator
3. 为某个账户投票
4. 取消为某个账户投票

实现这四个操作采用的是四种交易类型 成为validator

> eth.sendTransaction({from: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', to: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', value: 0, type: 1})

退出validator

> eth.sendTransaction({from: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', to: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', value: 0, type: 2})

为某个账户投票

> eth.sendTransaction({from: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', to: '0x5b76fff970bf8a351c1c9ebfb5e5a9493e956ddd', value: 0, type: 3})

取消为某个账户投票

> eth.sendTransaction({from: '0x646ba1fa42eb940aac67103a71e9a908ef484ec3', to: '0x5b76fff970bf8a351c1c9ebfb5e5a9493e956ddd', value: 0, type: 4})

正常的交易type为0