FEAT: Allow cancel inactive limit orders

x/dex/keeper/cancel_limit_order.go

@@ -59,20 +59,20 @@ func (k Keeper) ExecuteCancelLimitOrder(
 ) (makerCoinOut, takerCoinOut sdk.Coin, tradePairID *types.TradePairID, error error) {
 	trancheUser, found := k.GetLimitOrderTrancheUser(ctx, callerAddr.String(), trancheKey)
 	if !found {
-		return sdk.Coin{}, sdk.Coin{}, nil, types.ErrActiveLimitOrderNotFound
+		return sdk.Coin{}, sdk.Coin{}, nil, types.ErrValidLimitOrderTrancheNotFound
 	}
 
 	tradePairID, tickIndex := trancheUser.TradePairId, trancheUser.TickIndexTakerToMaker
-	tranche := k.GetLimitOrderTranche(
+	tranche, wasFilled, found := k.FindLimitOrderTranche(
 		ctx,
 		&types.LimitOrderTrancheKey{
 			TradePairId:           tradePairID,
 			TickIndexTakerToMaker: tickIndex,
 			TrancheKey:            trancheKey,
 		},
 	)
-	if tranche == nil {
-		return sdk.Coin{}, sdk.Coin{}, nil, types.ErrActiveLimitOrderNotFound
+	if !found {
+		return sdk.Coin{}, sdk.Coin{}, nil, types.ErrValidLimitOrderTrancheNotFound
 	}
 
 	makerAmountToReturn := tranche.RemoveTokenIn(trancheUser)
@@ -89,7 +89,11 @@ func (k Keeper) ExecuteCancelLimitOrder(
 	}
 
 	k.SaveTrancheUser(ctx, trancheUser)
-	k.SaveTranche(ctx, tranche)
+	if wasFilled {
+		k.SaveInactiveTranche(ctx, tranche)
+	} else {
+		k.SaveTranche(ctx, tranche)
+	}
 
 	if trancheUser.OrderType.HasExpiration() {
 		k.RemoveLimitOrderExpiration(ctx, *tranche.ExpirationTime, tranche.Key.KeyMarshal())

x/dex/keeper/integration_cancellimitorder_test.go

@@ -173,7 +173,7 @@ func (s *DexTestSuite) TestCancelTwiceFails() {
 	s.assertAliceBalances(50, 50)
 	s.assertDexBalances(0, 0)
 
-	s.aliceCancelsLimitSellFails(trancheKey, types.ErrActiveLimitOrderNotFound)
+	s.aliceCancelsLimitSellFails(trancheKey, types.ErrValidLimitOrderTrancheNotFound)
 }
 
 func (s *DexTestSuite) TestCancelPartiallyFilled() {
@@ -323,6 +323,43 @@ func (s *DexTestSuite) TestCancelFirstMultiWithdraw() {
 	s.assertAliceBalances(0, 10)
 }
 
+func (s *DexTestSuite) TestCancelMultiAfterFilled() {
+	s.fundAliceBalances(50, 0)
+	s.fundBobBalances(50, 0)
+	s.fundCarolBalances(0, 100)
+
+	// GIVEN alice and bob each limit sells 50 TokenA
+	trancheKey := s.aliceLimitSells("TokenA", 0, 50)
+	s.bobLimitSells("TokenA", 0, 50)
+
+	// carol swaps through the tranche
+	s.carolLimitSells("TokenB", -1, 100, types.LimitOrderType_IMMEDIATE_OR_CANCEL)
+
+	// WHEN alice and bob cancel their limit order
+	s.aliceCancelsLimitSell(trancheKey)
+	s.assertAliceBalances(0, 50)
+	s.bobCancelsLimitSell(trancheKey)
+	s.assertBobBalances(0, 50)
+
+	// THEN they get back the expected profit
+	s.assertAliceBalances(0, 50)
+	s.assertBobBalances(0, 50)
+
+	// AND tranche and trancheUsers are deleted
+
+	s.App.DexKeeper.GetLimitOrderTrancheUser(s.Ctx, s.alice.String(), trancheKey)
+	_, _, found := s.App.DexKeeper.FindLimitOrderTranche(s.Ctx, &types.LimitOrderTrancheKey{
+		TradePairId:           types.MustNewTradePairID("TokenB", "TokenA"),
+		TickIndexTakerToMaker: 0,
+		TrancheKey:            trancheKey,
+	})
+	s.False(found)
+	_, found = s.App.DexKeeper.GetLimitOrderTrancheUser(s.Ctx, s.alice.String(), trancheKey)
+	s.Assert().False(found)
+	_, found = s.App.DexKeeper.GetLimitOrderTrancheUser(s.Ctx, s.carol.String(), trancheKey)
+	s.Assert().False(found)
+}
+
 func (s *DexTestSuite) TestCancelGoodTil() {
 	s.fundAliceBalances(50, 0)
 	tomorrow := time.Now().AddDate(0, 0, 1)
@@ -339,7 +376,7 @@ func (s *DexTestSuite) TestCancelGoodTil() {
 	s.assertNLimitOrderExpiration(0)
 }
 
-func (s *DexTestSuite) TestCancelGoodTilAfterExpirationFails() {
+func (s *DexTestSuite) TestCancelGoodTilAfterExpiration() {
 	s.fundAliceBalances(50, 0)
 	tomorrow := time.Now().AddDate(0, 0, 1)
 	// GIVEN alice limit sells 50 TokenA with goodTil date of tommrow
@@ -350,8 +387,19 @@ func (s *DexTestSuite) TestCancelGoodTilAfterExpirationFails() {
 	// WHEN expiration date has passed
 	s.beginBlockWithTime(time.Now().AddDate(0, 0, 2))
 
-	// THEN alice cancellation fails
-	s.aliceCancelsLimitSellFails(trancheKey, types.ErrActiveLimitOrderNotFound)
+	// THEN alice cancellation succeeds
+	s.aliceCancelsLimitSell(trancheKey)
+
+	s.assertAliceBalances(50, 0)
+
+	// TrancheUser and Tranche are removed
+	s.App.DexKeeper.GetLimitOrderTrancheUser(s.Ctx, s.alice.String(), trancheKey)
+	_, _, found := s.App.DexKeeper.FindLimitOrderTranche(s.Ctx, &types.LimitOrderTrancheKey{
+		TradePairId:           types.MustNewTradePairID("TokenB", "TokenA"),
+		TickIndexTakerToMaker: 0,
+		TrancheKey:            trancheKey,
+	})
+	s.False(found)
 }
 
 func (s *DexTestSuite) TestCancelJITSameBlock() {
@@ -380,7 +428,17 @@ func (s *DexTestSuite) TestCancelJITNextBlock() {
 	s.nextBlockWithTime(time.Now())
 	s.beginBlockWithTime(time.Now())
 
-	// THEN alice cancellation fails
-	s.aliceCancelsLimitSellFails(trancheKey, types.ErrActiveLimitOrderNotFound)
-	s.assertAliceBalances(0, 0)
+	// THEN alice cancellation succeeds
+	s.aliceCancelsLimitSell(trancheKey)
+
+	s.assertAliceBalances(50, 0)
+
+	// TrancheUser and Tranche are removed
+	s.App.DexKeeper.GetLimitOrderTrancheUser(s.Ctx, s.alice.String(), trancheKey)
+	_, _, found := s.App.DexKeeper.FindLimitOrderTranche(s.Ctx, &types.LimitOrderTrancheKey{
+		TradePairId:           types.MustNewTradePairID("TokenB", "TokenA"),
+		TickIndexTakerToMaker: 0,
+		TrancheKey:            trancheKey,
+	})
+	s.False(found)
 }

x/dex/types/errors.go

@@ -69,11 +69,6 @@ var (
 		1125,
 		"MaxAmountIn in must be > 0 for swap.",
 	)
-	ErrActiveLimitOrderNotFound = sdkerrors.Register(
-		ModuleName,
-		1128,
-		"No active limit found. It does not exist or has already been filled",
-	)
 	ErrZeroWithdraw = sdkerrors.Register(
 		ModuleName,
 		1129,