Get history

const params = {
  witnesses: witnesses,
  addresses: ['ULQA63NGEZACP4N7ZMBUBISH6ZTCUS2Q']
};
​
client.api.getHistory(params, function(err, result) {
  console.log(result);
});

{
  unstable_mc_joints: [
    {
      unit: [Object]
    },
    {
      unit: [Object]
    }, 
    ...
  ],
  witness_change_and_definition_joints: [
    {
      unit: [Object],
      ball: 'CxK1luSnAk5+MaGyaE9wl26JdwAkSPFDqWJdYs9gRng='
    }
  ],
  joints: [
    {
      unit: [Object],
      ball: 'HCEsVPYN9g7tGOVWlixTlA7Cg4fXsd1VDQSgUzHZljI='
    },
    {
      unit: [Object],
      ball: '7Zk9IQja19XZyJY0MPZZxAhIjV5Uydr+zUvoQXvGBKs='
    },
    ...
  ],
  proofchain_balls: [
    {
      unit: 'rVuepU0c43PKbqM2BgnpOLaBCGdaxG0w6WBpSjaCHgA=',
      ball: 'zTN1OJcGfibm2hxitGnQRx0HSzhfhycFIXsaL7gnUNY=',
      parent_balls: [Array]
    },
    {
      unit: 'Mn8nOpIQvhQvPjlnDBbtYwUbRolrt40Igr8txWch0s0=',
      ball: 'Ocgs5zd0mWeqWNm/+gT0wqpfnd9+mj5BaaABndamw0E=',
      parent_balls: [Array]
    },
   ...
  ]
}