/// <summary>
/// Helper method to resolve FcntDown in case one was not yet acquired
/// </summary>
/// <returns>0 if the resolution failed or > 0 if a valid frame count was acquired</returns>
async ValueTask <uint> EnsureHasFcntDownAsync(
LoRaDevice loRaDevice,
uint?fcntDown,
uint payloadFcnt,
ILoRaDeviceFrameCounterUpdateStrategy frameCounterStrategy)
{
if (fcntDown > 0)
{
return(fcntDown.Value);
}
var newFcntDown = await frameCounterStrategy.NextFcntDown(loRaDevice, payloadFcnt);
// Failed to update the fcnt down
// In multi gateway scenarios it means the another gateway was faster than using, can stop now
if (newFcntDown <= 0)
{
Logger.Log(loRaDevice.DevEUI, "another gateway has already sent ack or downlink msg", LogLevel.Debug);
}
else
{
Logger.Log(loRaDevice.DevEUI, $"down frame counter: {loRaDevice.FCntDown}", LogLevel.Debug);
}
return(newFcntDown);
}
/// <summary>
/// Helper method to resolve FcntDown in case one was not yet acquired
/// </summary>
/// <returns>0 if the resolution failed or > 0 if a valid frame count was acquired</returns>
async ValueTask <uint> EnsureHasFcntDownAsync(
LoRaDevice loRaDevice,
uint?fcntDown,
uint payloadFcnt,
ILoRaDeviceFrameCounterUpdateStrategy frameCounterStrategy)
{
if (fcntDown.HasValue)
{
return(fcntDown.Value);
}
var newFcntDown = await frameCounterStrategy.NextFcntDown(loRaDevice, payloadFcnt);
// Failed to update the fcnt down
// In multi gateway scenarios it means the another gateway was faster than using, can stop now
LogFrameCounterDownState(loRaDevice, newFcntDown);
return(newFcntDown);
}