getSubscribersCount static method
getSubscribersCount RPC returns the number of subscribers of a topic
(not including txPool). If subscriberHashPrefix
is not empty, only subscriber
whose sha256(pubkey+identifier) contains this prefix will be counted. Each
prefix byte will reduce result count to about 1/256, and also reduce response
time to about 1/256 if there are a lot of subscribers. This is a good way to
sample subscribers randomly with low cost.
Implementation
static Future<int> getSubscribersCount(String topic,
{Uint8List? subscriberHashPrefix, RpcConfig? config}) async {
try {
int count = await _methodChannel.invokeMethod('getSubscribersCount', {
'topic': topic,
'subscriberHashPrefix': subscriberHashPrefix,
'seedRpc': config?.seedRPCServerAddr?.isNotEmpty == true
? config?.seedRPCServerAddr
: [DEFAULT_SEED_RPC_SERVER],
});
return count;
} catch (e) {
rethrow;
}
}