dbft: improve "ignoring"-related debug messages

PrepareRequest and PrepareResponse are ignored not only because of view
changing. Wrong log is misleading, so we'd better have the log that reflects
the real state of things.

Signed-off-by: Anna Shaleva <[email protected]>

dbft.go

@@ -295,7 +295,7 @@ func (d *DBFT) onPrepareRequest(msg payload.ConsensusPayload) {
 	// ignore prepareRequest if we had already received it or
 	// are in process of changing view
 	if d.RequestSentOrReceived() { //|| (d.ViewChanging() && !d.MoreThanFNodesCommittedOrLost()) {
-		d.Logger.Debug("ignoring PrepareRequest due to view changing",
+		d.Logger.Debug("ignoring PrepareRequest",
 			zap.Bool("sor", d.RequestSentOrReceived()),
 			zap.Bool("viewChanging", d.ViewChanging()),
 			zap.Bool("moreThanF", d.MoreThanFNodesCommittedOrLost()))
@@ -422,7 +422,11 @@ func (d *DBFT) onPrepareResponse(msg payload.ConsensusPayload) {
 	// ignore PrepareResponse if in process of changing view
 	m := d.PreparationPayloads[msg.ValidatorIndex()]
 	if m != nil || d.ViewChanging() && !d.MoreThanFNodesCommittedOrLost() {
-		d.Logger.Debug("ignoring PrepareResponse because of view changing")
+		d.Logger.Debug("ignoring PrepareResponse",
+			zap.Bool("dup", m != nil),
+			zap.Bool("sor", d.RequestSentOrReceived()),
+			zap.Bool("viewChanging", d.ViewChanging()),
+			zap.Bool("moreThanF", d.MoreThanFNodesCommittedOrLost()))
 		return
 	}