get https://api.shasta.trongrid.io/wallet/getbandwidthprices
查询历史带宽单价
返回值
prices - string ：所有历史带宽单价信息。每次单价变动以逗号分隔，冒号前为毫秒时间戳，冒号后为以sun为单位的带宽单价。
Click
Try It! to start a request and see the response here!