diff --git a/orcawhirpool.go b/orcawhirpool.go
index 5ba7f56..9712c47 100644
--- a/orcawhirpool.go
+++ b/orcawhirpool.go
@@ -281,7 +281,7 @@ func orcaWhirPoolLiquidityParser(tx *Tx, instruction Instruction, innerInstructi
 		return nil, increaseOffset(offset), InstructionIgnoredError
 	}
 	if baseAmount.Equal(decimal.Zero) || quoteAmount.Equal(decimal.Zero) {
-		instructionName += "_on_side"
+		instructionName += "_one_side"
 	}
 	if (baseTokenBalance == nil && !baseAmount.Equal(decimal.Zero)) || (quoteTokenBalance == nil && !quoteAmount.Equal(decimal.Zero)) {
 		return nil, offset, fmt.Errorf("token balance is nil but amount is not zero")
@@ -388,7 +388,7 @@ func orcaWhirPoolLiquidityV2Parser(tx *Tx, instruction Instruction, innerInstruc
 		return nil, offset, InstructionIgnoredError
 	}
 	if baseAmount.Equal(decimal.Zero) || quoteAmount.Equal(decimal.Zero) {
-		instructionName += "_on_side"
+		instructionName += "_one_side"
 	}
 	if (baseTokenBalance == nil && !baseAmount.Equal(decimal.Zero)) || (quoteTokenBalance == nil && !quoteAmount.Equal(decimal.Zero)) {
 		return nil, offset, fmt.Errorf("token balance is nil but amount is not zero")
@@ -493,7 +493,7 @@ func orcaWhirPoolCollectFeeParser(tx *Tx, instruction Instruction, innerInstruct
 		return nil, offset, InstructionIgnoredError
 	}
 	if baseAmount.Equal(decimal.Zero) || quoteAmount.Equal(decimal.Zero) {
-		instructionName += "_on_side"
+		instructionName += "_one_side"
 	}
 	if (baseTokenBalance == nil && !baseAmount.Equal(decimal.Zero)) || (quoteTokenBalance == nil && !quoteAmount.Equal(decimal.Zero)) {
 		return nil, offset, fmt.Errorf("token balance is nil but amount is not zero")
@@ -595,7 +595,7 @@ func orcaWhirPoolCollectFeeV2Parser(tx *Tx, instruction Instruction, innerInstru
 		return nil, offset, InstructionIgnoredError
 	}
 	if baseAmount.Equal(decimal.Zero) || quoteAmount.Equal(decimal.Zero) {
-		instructionName += "_on_side"
+		instructionName += "_one_side"
 	}
 	if (baseTokenBalance == nil && !baseAmount.Equal(decimal.Zero)) || (quoteTokenBalance == nil && !quoteAmount.Equal(decimal.Zero)) {
 		return nil, offset, fmt.Errorf("token balance is nil but amount is not zero")
@@ -697,7 +697,7 @@ func orcaWhirPoolCollectProtocolFeeV2Parser(tx *Tx, instruction Instruction, inn
 		return nil, offset, InstructionIgnoredError
 	}
 	if baseAmount.Equal(decimal.Zero) || quoteAmount.Equal(decimal.Zero) {
-		instructionName += "_on_side"
+		instructionName += "_one_side"
 	}
 	if (baseTokenBalance == nil && !baseAmount.Equal(decimal.Zero)) || (quoteTokenBalance == nil && !quoteAmount.Equal(decimal.Zero)) {
 		return nil, offset, fmt.Errorf("token balance is nil but amount is not zero")
@@ -811,23 +811,23 @@ func orcaWhirPoolSwapParser(tx *Tx, instruction Instruction, innerInstructions I
 	}
 
 	swap := Swap{
-			Program:           SolProgramOrcaWhirPool,
-			Event:             event,
-			Pool:              pool,
-			BaseMint:          baseTokenBalance.MintAccount,
-			QuoteMint:         quoteTokenBalance.MintAccount,
-			BaseTokenProgram:  baseTokenBalance.ProgramIDAccount,
-			QuoteTokenProgram: quoteTokenBalance.ProgramIDAccount,
-			BaseMintDecimals:  uint8(baseTokenBalance.UITokenAmount.Decimals),
-			QuoteMintDecimals: uint8(quoteTokenBalance.UITokenAmount.Decimals),
-			BaseAmount:        baseAmount,
-			QuoteAmount:       quoteAmount,
-			BaseReserve:       baseReserve,
-			QuoteReserve:      quoteReserve,
-			UserBaseBalance:   userBase,
-			UserQuoteBalance:  userQuote,
-			User:              user,
-			EntryContract:     entryContract,
+		Program:           SolProgramOrcaWhirPool,
+		Event:             event,
+		Pool:              pool,
+		BaseMint:          baseTokenBalance.MintAccount,
+		QuoteMint:         quoteTokenBalance.MintAccount,
+		BaseTokenProgram:  baseTokenBalance.ProgramIDAccount,
+		QuoteTokenProgram: quoteTokenBalance.ProgramIDAccount,
+		BaseMintDecimals:  uint8(baseTokenBalance.UITokenAmount.Decimals),
+		QuoteMintDecimals: uint8(quoteTokenBalance.UITokenAmount.Decimals),
+		BaseAmount:        baseAmount,
+		QuoteAmount:       quoteAmount,
+		BaseReserve:       baseReserve,
+		QuoteReserve:      quoteReserve,
+		UserBaseBalance:   userBase,
+		UserQuoteBalance:  userQuote,
+		User:              user,
+		EntryContract:     entryContract,
 	}
 	swap.SetSwapAmountInfo(swapMode, decimal.NewFromUint64(amount), decimal.NewFromUint64(otherAmountThreshold))
 
@@ -922,23 +922,23 @@ func orcaWhirPoolSwapV2Parser(tx *Tx, instruction Instruction, innerInstructions
 	offset[1] += uint(skipOffset + 1)
 
 	swap := Swap{
-			Program:           SolProgramOrcaWhirPool,
-			Event:             event,
-			Pool:              pool,
-			BaseMint:          baseTokenBalance.MintAccount,
-			QuoteMint:         quoteTokenBalance.MintAccount,
-			BaseTokenProgram:  baseTokenBalance.ProgramIDAccount,
-			QuoteTokenProgram: quoteTokenBalance.ProgramIDAccount,
-			BaseMintDecimals:  uint8(baseTokenBalance.UITokenAmount.Decimals),
-			QuoteMintDecimals: uint8(quoteTokenBalance.UITokenAmount.Decimals),
-			BaseAmount:        baseAmount,
-			QuoteAmount:       quoteAmount,
-			BaseReserve:       baseReserve,
-			QuoteReserve:      quoteReserve,
-			UserBaseBalance:   userBase,
-			UserQuoteBalance:  userQuote,
-			User:              user,
-			EntryContract:     entryContract,
+		Program:           SolProgramOrcaWhirPool,
+		Event:             event,
+		Pool:              pool,
+		BaseMint:          baseTokenBalance.MintAccount,
+		QuoteMint:         quoteTokenBalance.MintAccount,
+		BaseTokenProgram:  baseTokenBalance.ProgramIDAccount,
+		QuoteTokenProgram: quoteTokenBalance.ProgramIDAccount,
+		BaseMintDecimals:  uint8(baseTokenBalance.UITokenAmount.Decimals),
+		QuoteMintDecimals: uint8(quoteTokenBalance.UITokenAmount.Decimals),
+		BaseAmount:        baseAmount,
+		QuoteAmount:       quoteAmount,
+		BaseReserve:       baseReserve,
+		QuoteReserve:      quoteReserve,
+		UserBaseBalance:   userBase,
+		UserQuoteBalance:  userQuote,
+		User:              user,
+		EntryContract:     entryContract,
 	}
 	swap.SetSwapAmountInfo(swapMode, decimal.NewFromUint64(amount), decimal.NewFromUint64(otherAmountThreshold))
 
diff --git a/tx_binary.go b/tx_binary.go
index 1c64c35..c1a9933 100644
--- a/tx_binary.go
+++ b/tx_binary.go
@@ -728,7 +728,7 @@ func newSwapBinary(swap Swap, index int, addressIndex *txBinaryAddressIndex) (Sw
 
 	out := SwapBinary{
 		Program:               swap.Program,
-		Event:                 swap.Event,
+		Event:                 txBinaryCanonicalEvent(swap.Event),
 		TxIndex:               int32(swap.TxIndex),
 		InstrIdx:              swap.InstrIdx,
 		InnerIdx:              swap.InnerIdx,
@@ -918,6 +918,17 @@ func txBinaryPlatformsFromTx(platforms map[string]platformInfo) ([]PlatformBinar
 	return out, nil
 }
 
+func txBinaryCanonicalEvent(event string) string {
+	switch event {
+	case "add_liquidity_on_side":
+		return TxEventAddLiquidityOneSide
+	case "remove_liquidity_on_side":
+		return TxEventRemoveLiquidityOneSide
+	default:
+		return event
+	}
+}
+
 func txBinaryMevAgentsFromTx(mevAgents map[string]mevInfo) ([]MevAgentBinary, error) {
 	if len(mevAgents) == 0 {
 		return nil, nil
diff --git a/tx_binary_test.go b/tx_binary_test.go
index a588e07..7d04c97 100644
--- a/tx_binary_test.go
+++ b/tx_binary_test.go
@@ -354,6 +354,62 @@ func TestTxBinaryPreservesFractionalReserves(t *testing.T) {
 	}
 }
 
+func TestTxBinaryCanonicalizesOnSideEventAlias(t *testing.T) {
+	tx := &Tx{
+		Signer:               mustPubKey("So11111111111111111111111111111111111111112"),
+		Block:                1,
+		BlockIndex:           1,
+		CuFee:                decimal.NewFromInt(1),
+		CUPrice:              decimal.RequireFromString("0.000001"),
+		BeforeSolBalance:     decimal.RequireFromString("1.000000000"),
+		AfterSOLBalance:      decimal.RequireFromString("0.900000000"),
+		ComputeUnitsConsumed: 1,
+		CuLimit:              1,
+		Swaps: []Swap{
+			{
+				Program:               SolProgramOrcaWhirPool,
+				Event:                 "remove_liquidity_on_side",
+				Pool:                  mustPubKey("11111111111111111111111111111111"),
+				BaseMint:              mustPubKey("3wyAj7RtG72wM1Wv9DkYfL7RAx9X3Jx1sC6E6mN4jWeL"),
+				QuoteMint:             solana.WrappedSol,
+				BaseTokenProgram:      solana.TokenProgramID,
+				QuoteTokenProgram:     solana.TokenProgramID,
+				Creator:               mustPubKey("BPFLoader1111111111111111111111111111111111"),
+				BaseMintDecimals:      6,
+				QuoteMintDecimals:     9,
+				User:                  mustPubKey("SysvarRent111111111111111111111111111111111"),
+				BaseAmount:            decimal.NewFromInt(10),
+				QuoteAmount:           decimal.Zero,
+				SwapMode:              SwapModeExactIn,
+				FixedAmount:           decimal.NewFromInt(10),
+				FixedAmountSide:       SwapAmountSideBase,
+				FixedMint:             mustPubKey("3wyAj7RtG72wM1Wv9DkYfL7RAx9X3Jx1sC6E6mN4jWeL"),
+				LimitAmountType:       SwapLimitTypeMinOut,
+				LimitAmount:           decimal.Zero,
+				LimitAmountSide:       SwapAmountSideQuote,
+				ActualLimitAmount:     decimal.Zero,
+				ActualLimitAmountSide: SwapAmountSideQuote,
+				BaseReserve:           decimal.RequireFromString("123.4"),
+				QuoteReserve:          decimal.RequireFromString("456.7"),
+				AfterSOLBalance:       decimal.RequireFromString("0.800000000"),
+			},
+		},
+	}
+
+	encoded, err := EncodeTxBinary(tx)
+	if err != nil {
+		t.Fatalf("EncodeTxBinary() error = %v", err)
+	}
+
+	decoded, err := DecodeTxBinary(encoded)
+	if err != nil {
+		t.Fatalf("DecodeTxBinary() error = %v", err)
+	}
+	if got := decoded.Swaps[0].Event; got != TxEventRemoveLiquidityOneSide {
+		t.Fatalf("Event = %q, want %q", got, TxEventRemoveLiquidityOneSide)
+	}
+}
+
 func TestTxsBinaryRoundTripWithSharedAddressTable(t *testing.T) {
 	tx1 := Tx{
 		Signer:               mustPubKey("So11111111111111111111111111111111111111112"),