serialized method
Serialize the request to send it to the remote relays websockets.
Implementation
String serialized() {
subscriptionId =
subscriptionId ?? Nostr.instance.utilsService.random64HexChars();
String decodedFilters =
jsonEncode(filters.map((item) => item.toMap()).toList());
String header = jsonEncode([NostrConstants.request, subscriptionId]);
final result =
'${header.substring(0, header.length - 1)},${decodedFilters.substring(1, decodedFilters.length)}';
return result;
}