getMemos method
returns memos in the same order as txHashes passed in
Implementation
Future<List<String>> getMemos(List<String> txids) async {
var futures = <Future<String>>[];
peer.withBatch(() {
for (var txid in txids) {
futures.add(getMemo(txid));
}
});
List<String> results = await Future.wait<String>(futures);
return results;
}