Add binanceWallet pumpfun

pkg/shreder/program_binancewallet.go

@@ -0,0 +1,118 @@
+package shreder
+
+import (
+	"bytes"
+	"encoding/binary"
+	"fmt"
+
+	"github.com/gagliardetto/solana-go"
+)
+
+var binanceWalletProgramID = solana.MustPublicKeyFromBase58("B3111yJCeHBcA1bizdJjUFPALfhAfSRnAbJzGUtnt56A")
+
+const (
+	binanceWalletMinDataLen = 72
+	binanceWalletSolOffset  = 23
+	binanceWalletTokenOff   = 39
+	binanceWalletSolRepeat  = 51
+	binanceWalletSideOff    = 71
+
+	binanceWalletPumpBuy  = 0x05
+	binanceWalletPumpSell = 0x06
+)
+
+var binanceWalletMarker = []byte{0x13, 0x2c, 0x82, 0x94, 0x48, 0x38, 0x2c, 0xee}
+
+func parseBinanceWalletInstruction(tx VersionedTransaction, instructionIndex int) (TxSignalBatch, error) {
+	if instructionIndex >= len(tx.Instructions) {
+		return nil, fmt.Errorf("instruction index out of bounds")
+	}
+
+	instruction := tx.Instructions[instructionIndex]
+	if len(instruction.Data) < len(binanceWalletMarker) || !bytes.Contains(instruction.Data, binanceWalletMarker) {
+		return nil, nil
+	}
+	if len(instruction.Data) < binanceWalletMinDataLen {
+		return nil, fmt.Errorf("data too short for binance wallet, len=%d", len(instruction.Data))
+	}
+
+	side := instruction.Data[binanceWalletSideOff]
+	if side != binanceWalletPumpBuy && side != binanceWalletPumpSell {
+		return nil, nil
+	}
+
+	if len(instruction.Accounts) <= 8 {
+		return nil, fmt.Errorf("accounts too short")
+	}
+
+	wsolIdx := 7
+	tokenIdx := 8
+	if side == binanceWalletPumpSell {
+		wsolIdx = 8
+		tokenIdx = 7
+	}
+
+	wsolKey, err := tx.GetAccount(int(instruction.Accounts[wsolIdx]))
+	if err != nil {
+		return nil, err
+	}
+	if !wsolKey.Equals(solana.WrappedSol) {
+		return nil, nil
+	}
+	mint, err := tx.GetAccount(int(instruction.Accounts[tokenIdx]))
+	if err != nil {
+		return nil, err
+	}
+
+	amountA := binary.LittleEndian.Uint64(instruction.Data[binanceWalletSolOffset : binanceWalletSolOffset+8])
+	if amountA == 0 && len(instruction.Data) >= binanceWalletSolRepeat+8 {
+		repeat := binary.LittleEndian.Uint64(instruction.Data[binanceWalletSolRepeat : binanceWalletSolRepeat+8])
+		if repeat > 0 {
+			amountA = repeat
+		}
+	}
+	amountB := binary.LittleEndian.Uint64(instruction.Data[binanceWalletTokenOff : binanceWalletTokenOff+8])
+
+	solAmount := amountA
+	tokenAmount := amountB
+	if side == binanceWalletPumpSell {
+		solAmount = amountB
+		tokenAmount = amountA
+	}
+
+	maker := ""
+	if len(tx.StaticAccountKeys) > 0 {
+		maker = tx.StaticAccountKeys[0].String()
+	} else if len(instruction.Accounts) > 0 {
+		key, err := tx.GetAccount(int(instruction.Accounts[0]))
+		if err != nil {
+			return nil, err
+		}
+		maker = key.String()
+	}
+
+	event := "buy"
+	exactIn := true
+	if side == binanceWalletPumpSell {
+		event = "sell"
+		exactIn = false
+	}
+
+	return TxSignalBatch{&TxSignal{
+		TxHash:             tx.Signatures[0].String(),
+		Label:              "binancewallet",
+		Maker:              maker,
+		Token0Address:      mint.String(),
+		Token1Address:      wsolMint,
+		Token0Amount:       formatTokenAmount(tokenAmount),
+		Token1Amount:       formatSolAmount(solAmount),
+		Program:            "Pump",
+		Event:              event,
+		IsToken2022:        false,
+		IsMayhemMode:       false,
+		ExactSOL:           exactIn,
+		Block:              tx.Block,
+		Token0AmountUint64: tokenAmount,
+		Token1AmountUint64: solAmount,
+	}}, nil
+}

pkg/shreder/txparser.go

@@ -54,6 +54,7 @@ var (
 		flasProgramID:          {parseFlasInstruction, "flas"},
 		photonProgramID:        {parsePhotonInstruction, "photon"},
 		pumpAmmProgramID:       {parsePumpAmmInstruction, "pumpamm"},
+		binanceWalletProgramID: {parseBinanceWalletInstruction, "binancewallet"},
 		boboProgramID:          {parseBoboInstruction, "bobo"},
 		qtkvProgramID:          {parseQtkvInstruction, "qtkv"},
 		fjszProgramID:          {parseFjszInstruction, "fjsz"},