enforce min & max lease period

x/cosmostest/keeper/auction_state.go

@@ -38,7 +38,7 @@ func (k Keeper) FinalizeExpiredAuctions(ctx sdk.Context) {
 				return errors.Errorf("could not get highest bid for auction %s: %s", auctionId, err)
 			}
 
-			// Remainig Unpaid: Full bid amount
+			// Remaining Unpaid: Full bid amount
 			auction.Remaining = auction.Best.Amount
 
 			// clear auction

x/cosmostest/keeper/msg_server_new_auction.go

@@ -18,10 +18,28 @@ func (k msgServer) NewAuction(goCtx context.Context, msg *types.MsgNewAuction) (
 
 	next, found := k.Keeper.GetNextAuction(ctx)
 	if !found {
-		return nil, errors.New("Auction not found")
+		return nil, errors.New("unable to get next auction index")
 	}
 	index := strconv.FormatUint(next.AuctionId, 10)
 
+	auctionLen := msg.LeaseEnd - uint64(ctx.BlockTime().Unix())
+
+	if auctionLen < auctionconfig.MinLeasePeriod {
+		return nil, fmt.Errorf(
+			"Auction length %d is below min lease period of %d",
+			auctionLen,
+			auctionconfig.MinLeasePeriod,
+		)
+	}
+
+	if auctionLen > auctionconfig.MaxLeasePeriod {
+		return nil, fmt.Errorf(
+			"Auction length %d is above max lease period of %d",
+			auctionLen,
+			auctionconfig.MaxLeasePeriod,
+		)
+	}
+
 	auction := types.Auction{
 		Index:       index,
 		Name:        msg.Name,