optimize liveness handling

Author: keithsue

x/dlc/keeper/tss.go

@@ -46,6 +46,11 @@ func (k Keeper) DKGCompletedHandler(ctx sdk.Context, id uint64, ty string, inten
 func (k Keeper) DKGTimeoutHandler(ctx sdk.Context, id uint64, ty string, intent int32, absentParticipants []string) error {
 	switch ty {
 	case types.DKG_TYPE_NONCE:
+		if len(absentParticipants) == len(k.tssKeeper.GetDKGRequest(ctx, id).Participants) {
+			// remain current liveness if all participants are absent
+			return nil
+		}
+
 		for _, participant := range absentParticipants {
 			liveness := k.GetOracleParticipantLiveness(ctx, participant)
 			if liveness.LastDkgId > id {

x/dlc/types/expected_keepers.go

@@ -26,6 +26,7 @@ type StakingKeeper interface {
 // TSSKeeper defines the expected TSS keeper interface
 type TSSKeeper interface {
 	AllowedDKGParticipants(ctx sdk.Context) []string
+	GetDKGRequest(ctx sdk.Context, id uint64) *tsstypes.DKGRequest
 
 	InitiateDKG(ctx sdk.Context, module string, ty string, intent int32, participants []string, threshold uint32, batchSize uint32) *tsstypes.DKGRequest
 	InitiateSigningRequest(ctx sdk.Context, module string, scopedId string, ty tsstypes.SigningType, intent int32, pubKey string, sigHashes []string, options *tsstypes.SigningOptions) *tsstypes.SigningRequest