private async Task CheckRequestAsync(ViewChangeRequestMessage req)
{
//_log.LogInformation($"CheckRequestAsync from {req.From.Shorten()} for view {req.ViewID} Signature {req.requestSignature.Shorten()}");
// make sure all request from all voters
if (!_context.Board.AllVoters.Contains(req.From))
{
return;
}
if (reqMsgs.Values.Any(a => a.msg.From == req.From))
{
reqMsgs.TryRemove(req.From, out _);
}
var lastSb = await _sys.Storage.GetLastServiceBlockAsync();
var lastCons = await _sys.Storage.GetLastConsolidationBlockAsync();
if (Signatures.VerifyAccountSignature($"{lastSb.Hash}|{lastCons.Hash}", req.From, req.requestSignature))
{
if (reqMsgs.TryAdd(req.From, new VCReqWithTime(req)))
{
await CheckAllStatsAsync();
}
}
//else
// _log.LogWarning($"ViewChangeRequest signature verification failed from {req.From.Shorten()}");
}
/// <summary>
/// two ways to begin view changing: either one third of all voters requested, or local requested.
///
/// </summary>
/// <returns></returns>
internal async Task BeginChangeViewAsync(ViewChangeReason reason)
{
_log.LogInformation($"BeginChangeViewAsync: VID: {ViewId} Req: {reqMsgs.Count} Reply: {replyMsgs.Count} Commit: {commitMsgs.Count} Votes {commitMsgs.Count}/{LyraGlobal.GetMajority(_context.Board.AllVoters.Count)}/{_context.Board.AllVoters.Count} Replyed: {replySent} Commited: {commitSent}");
_reason = reason;
var lastSb = await _sys.Storage.GetLastServiceBlockAsync();
if (lastSb == null)
{
// genesis?
_log.LogCritical($"BeginChangeViewAsync has null service block. should not happend. error.");
return;
}
_isViewChanging = true;
ShiftView(lastSb.Height + 1);
selectedSuccess = false;
_log.LogInformation($"View change for ViewId {ViewId} begin at {TimeStarted}");
CalculateLeaderCandidate();
var lastCons = await _sys.Storage.GetLastConsolidationBlockAsync();
var req = new ViewChangeRequestMessage
{
From = _sys.PosWallet.AccountId,
ViewID = ViewId,
prevViewID = lastSb.Height,
requestSignature = Signatures.GetSignature(_sys.PosWallet.PrivateKey,
$"{lastSb.Hash}|{lastCons.Hash}", _sys.PosWallet.AccountId),
};
_context.Send2P2pNetwork(req);
await CheckRequestAsync(req);
}
public VCReqWithTime(ViewChangeRequestMessage Message)
{
msg = Message;
}