timeout function
Implementation
PollStrategy timeout(int milliseconds) {
final end = DateTime.now().millisecondsSinceEpoch + milliseconds;
return (
Principal canisterId,
RequestId requestId,
RequestStatusResponseStatus status,
) async {
if (DateTime.now().millisecondsSinceEpoch > end) {
throw TimeoutException(
'Request timed out after $milliseconds milliseconds:\n'
' Request ID: ${requestIdToHex(requestId)}\n'
' Request status: $status\n',
Duration(milliseconds: milliseconds),
);
}
};
}