private void OnChangeViewReceived(ConsensusPayload payload, ChangeView message)
{
if (message.NewViewNumber <= context.ViewNumber)
{
OnRecoveryRequestReceived(payload);
}
if (context.CommitSent())
{
return;
}
var expectedView = context.ChangeViewPayloads[payload.ValidatorIndex]?.GetDeserializedMessage <ChangeView>().NewViewNumber ?? (byte)0;
if (message.NewViewNumber <= expectedView)
{
return;
}
Log($"{nameof(OnChangeViewReceived)}: height={payload.BlockIndex} view={message.ViewNumber} index={payload.ValidatorIndex} nv={message.NewViewNumber}");
context.ChangeViewPayloads[payload.ValidatorIndex] = payload;
CheckExpectedView(message.NewViewNumber);
}
private void CheckExpectedView(byte viewNumber)
{
if (context.ViewNumber >= viewNumber)
{
return;
}
// if there are `M` change view payloads with NewViewNumber greater than viewNumber, then, it is safe to move
if (context.ChangeViewPayloads.Count(p => p != null && p.GetDeserializedMessage <ChangeView>().NewViewNumber >= viewNumber) >= context.M())
{
if (!context.WatchOnly())
{
ChangeView message = context.ChangeViewPayloads[context.MyIndex]?.GetDeserializedMessage <ChangeView>();
// Communicate the network about my agreement to move to `viewNumber`
// if my last change view payload, `message`, has NewViewNumber lower than current view to change
if (message is null || message.NewViewNumber < viewNumber)
{
localNode.Tell(new LocalNode.SendDirectly {
Inventory = context.MakeChangeView()
});
}
}
InitializeConsensus(viewNumber);
}
}
