subscribeBalances method
Implementation
Future<void> subscribeBalances(
String chain, String address, Function(Map) callback) async {
assert(_runner != null, 'bridge not init');
final msgChannel = '${chain}BridgeTokenBalances$address';
final code =
'bridge.subscribeBalances("$chain", "$address", "$msgChannel")';
_runner?.subscribeMessage(code, msgChannel, callback);
}