SubstrateClient connection event handlers #83
Description
Problem:
I am currently unable to inform users in my application about the connection status of the SubstrateClient.
Solution:
Introduce EventHandler<T>s that are fired whenever client connects, disconnects, or is reconnecting...
These 5 event handlers would be useful:
onConnect
onDisconnect
onReconnecting
onReconnected
onReconnectFailed