counter method
Returns the counter of source
in the chain defined by chain
and level
Implementation
Future<int> counter(String source, [chain = 'main', level = 'head']) async {
log.info('request for counter [ chain:$chain, level:$level]');
final response = await httpClient.get(paths.counter(source: source, chain: chain, level: level));
return int.parse(response.data);
}