fix EncodeTxBinary

internal/example/cmd/main.go

@@ -62,6 +62,12 @@ func main() {
 						swap.BaseAmount.Div(decimal.NewFromInt(1e6)), swap.QuoteAmount.Div(decimal.NewFromInt(1e9)), swap.FixedAmount.String(), swap.LimitAmount.String())
 				}
 			}
+			if len(ptx.Swaps) > 0 {
+				_, err := parser.EncodeTxBinary(ptx)
+				if err != nil {
+					fmt.Printf("success tx : %s, , block: %d, tx: %s, err: %s \n", time.Now().Format("2006-01-02 15:04:05"), ptx.Block, ptx.GetTxHash(), err.Error())
+				}
+			}
 
 		}
 		// currentBlock = ptx.Block

tx_binary.go

@@ -80,8 +80,8 @@ type SwapBinary struct {
 	ActualLimitAmountSide SwapAmountSide
 	SlippageBps           uint64
 
-	BaseReserve  uint64
-	QuoteReserve uint64
+	BaseReserve  float64
+	QuoteReserve float64
 	Mayhem       bool
 	Cashback     bool
 
@@ -777,10 +777,10 @@ func newSwapBinary(swap Swap, index int, addressIndex *txBinaryAddressIndex) (Sw
 	if out.SlippageBps, err = txBinaryRoundedDecimalToUint64(swap.SlippageBps, fmt.Sprintf("swap[%d].slippage_bps", index)); err != nil {
 		return SwapBinary{}, err
 	}
-	if out.BaseReserve, err = txBinaryDecimalToUint64(swap.BaseReserve, fmt.Sprintf("swap[%d].base_reserve", index)); err != nil {
+	if out.BaseReserve, err = txBinaryDecimalToFloat64Raw(swap.BaseReserve, fmt.Sprintf("swap[%d].base_reserve", index)); err != nil {
 		return SwapBinary{}, err
 	}
-	if out.QuoteReserve, err = txBinaryDecimalToUint64(swap.QuoteReserve, fmt.Sprintf("swap[%d].quote_reserve", index)); err != nil {
+	if out.QuoteReserve, err = txBinaryDecimalToFloat64Raw(swap.QuoteReserve, fmt.Sprintf("swap[%d].quote_reserve", index)); err != nil {
 		return SwapBinary{}, err
 	}
 	if out.UserBaseBalance, err = txBinaryDecimalToUint64(swap.UserBaseBalance, fmt.Sprintf("swap[%d].user_base_balance", index)); err != nil {
@@ -878,8 +878,8 @@ func (swap SwapBinary) toSwap(addressTable []solana.PublicKey, index int) (Swap,
 		ActualLimitAmount:     decimal.NewFromUint64(swap.ActualLimitAmount),
 		ActualLimitAmountSide: swap.ActualLimitAmountSide,
 		SlippageBps:           decimal.NewFromUint64(swap.SlippageBps),
-		BaseReserve:           decimal.NewFromUint64(swap.BaseReserve),
-		QuoteReserve:          decimal.NewFromUint64(swap.QuoteReserve),
+		BaseReserve:           txBinaryFloat64ToDecimalRaw(swap.BaseReserve),
+		QuoteReserve:          txBinaryFloat64ToDecimalRaw(swap.QuoteReserve),
 		Mayhem:                swap.Mayhem,
 		Cashback:              swap.Cashback,
 		UserBaseBalance:       decimal.NewFromUint64(swap.UserBaseBalance),
@@ -1063,6 +1063,14 @@ func txBinaryDecimalToFloat64(value decimal.Decimal, scale int32, field string)
 	return f, nil
 }
 
+func txBinaryDecimalToFloat64Raw(value decimal.Decimal, field string) (float64, error) {
+	f, exact := value.Float64()
+	if !exact && math.IsInf(f, 0) {
+		return 0, fmt.Errorf("%s cannot be represented as float64: %s", field, value.String())
+	}
+	return f, nil
+}
+
 func txBinaryFloat64ToDecimal(value float64, scale int32) decimal.Decimal {
 	formatted := strconv.FormatFloat(value, 'f', int(scale), 64)
 	out, err := decimal.NewFromString(formatted)
@@ -1072,6 +1080,15 @@ func txBinaryFloat64ToDecimal(value float64, scale int32) decimal.Decimal {
 	return out
 }
 
+func txBinaryFloat64ToDecimalRaw(value float64) decimal.Decimal {
+	formatted := strconv.FormatFloat(value, 'f', -1, 64)
+	out, err := decimal.NewFromString(formatted)
+	if err != nil {
+		return decimal.Zero
+	}
+	return out
+}
+
 type txBinaryEncoder struct {
 	buf bytes.Buffer
 }
@@ -1224,8 +1241,8 @@ func (enc *txBinaryEncoder) writeSwaps(swaps []SwapBinary, enumTable *txBinaryEn
 		enc.writeUint64(swap.ActualLimitAmount)
 		enc.writeUint8(uint8(swap.ActualLimitAmountSide))
 		enc.writeUint64(swap.SlippageBps)
-		enc.writeUint64(swap.BaseReserve)
-		enc.writeUint64(swap.QuoteReserve)
+		enc.writeFloat64(swap.BaseReserve)
+		enc.writeFloat64(swap.QuoteReserve)
 		enc.writeBool(swap.Mayhem)
 		enc.writeBool(swap.Cashback)
 		enc.writeUint64(swap.UserBaseBalance)
@@ -1720,10 +1737,10 @@ func txBinaryReadSwaps(dec txBinaryBodyReader, enumTable *txBinaryEnumTable) ([]
 		if swap.SlippageBps, err = dec.readUint64(); err != nil {
 			return nil, err
 		}
-		if swap.BaseReserve, err = dec.readUint64(); err != nil {
+		if swap.BaseReserve, err = dec.readFloat64(); err != nil {
 			return nil, err
 		}
-		if swap.QuoteReserve, err = dec.readUint64(); err != nil {
+		if swap.QuoteReserve, err = dec.readFloat64(); err != nil {
 			return nil, err
 		}
 		if swap.Mayhem, err = dec.readBool(); err != nil {

tx_binary_test.go

@@ -293,6 +293,67 @@ func TestTxBinaryAcceptsKnownEventEnums(t *testing.T) {
 	}
 }
 
+func TestTxBinaryPreservesFractionalReserves(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:               SolProgramMeteoraPools,
+				Event:                 TxEventAddLiquidity,
+				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.NewFromInt(20),
+				SwapMode:              SwapModeExactIn,
+				FixedAmount:           decimal.NewFromInt(20),
+				FixedAmountSide:       SwapAmountSideQuote,
+				FixedMint:             solana.WrappedSol,
+				LimitAmountType:       SwapLimitTypeMinOut,
+				LimitAmount:           decimal.NewFromInt(9),
+				LimitAmountSide:       SwapAmountSideBase,
+				LimitMint:             mustPubKey("3wyAj7RtG72wM1Wv9DkYfL7RAx9X3Jx1sC6E6mN4jWeL"),
+				ActualLimitAmount:     decimal.NewFromInt(10),
+				ActualLimitAmountSide: SwapAmountSideBase,
+				BaseReserve:           decimal.RequireFromString("123.4"),
+				QuoteReserve:          decimal.RequireFromString("710079483.625409498"),
+				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].BaseReserve.String(); got != "123.4" {
+		t.Fatalf("BaseReserve = %s, want 123.4", got)
+	}
+	diff := decoded.Swaps[0].QuoteReserve.Sub(decimal.RequireFromString("710079483.625409498")).Abs()
+	if diff.GreaterThan(decimal.RequireFromString("0.0000001")) {
+		t.Fatalf("QuoteReserve diff = %s, want <= 0.0000001", diff)
+	}
+}
+
 func TestTxsBinaryRoundTripWithSharedAddressTable(t *testing.T) {
 	tx1 := Tx{
 		Signer:               mustPubKey("So11111111111111111111111111111111111111112"),