v2.1.0 Release

New Features

• New
  • /contract/private/trade-fee-rate Support querying trade fee rate(KEYED)

Improvements

• Add CloudConst::API_URL_V2_PRO=https://api-cloud-v2.bitmart.com
• The ping/pong mechanism of the spot websocket has been modified to support ping text
• Optimize websocket, add login function and send function and data return callback parameters
  • The login function is used for ws login subscription
  • The send function replaces the subscribe function and can be used to subscribe and unsubscribe
  • The callback parameter function allows customers to customize the callback function