split program source file

pkg/shreder/program_gmgn.go

@@ -0,0 +1,78 @@
+package shreder
+
+import (
+	"encoding/binary"
+	"fmt"
+
+	"github.com/gagliardetto/solana-go"
+)
+
+var gmgnProgramID = solana.MustPublicKeyFromBase58("GMgnVFR8Jb39LoXsEVzb3DvBy3ywCmdmJquHUy1Lrkqb")
+var (
+	gmgnBuyTokensIX = []byte{0x66, 0x06, 0x3d, 0x12, 0x01, 0xda, 0xeb, 0xea}
+)
+
+func parseGMGNInstruction(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) == 0 {
+		return nil, fmt.Errorf("data is empty")
+	}
+	if len(instruction.Data) < 8 {
+		return nil, nil
+	}
+
+	var (
+		err      error
+		txSignal *TxSignal
+	)
+	if matchMethod(instruction.Data, gmgnBuyTokensIX) {
+		txSignal, err = parseGMGNBuy(tx, instruction)
+	}
+	if txSignal != nil {
+		return TxSignalBatch{txSignal}, err
+	}
+	return nil, err
+}
+
+func parseGMGNBuy(tx VersionedTransaction, instruction Instructions) (*TxSignal, error) {
+	if len(instruction.Accounts) < 8 {
+		return nil, fmt.Errorf("accounts too short")
+	}
+	if len(instruction.Data) < 24 {
+		return nil, fmt.Errorf("data too short for gmgn buy args, len=%d", len(instruction.Data))
+	}
+
+	mint, err := tx.GetAccount(int(instruction.Accounts[2]))
+	if err != nil {
+		return nil, err
+	}
+	user, err := tx.GetAccount(int(instruction.Accounts[6]))
+	if err != nil {
+		return nil, err
+	}
+
+	solAmount := binary.LittleEndian.Uint64(instruction.Data[8:16])
+	tokenAmount := binary.LittleEndian.Uint64(instruction.Data[16:24])
+
+	return &TxSignal{
+		TxHash:             tx.Signatures[0].String(),
+		Label:              "gmgn",
+		Maker:              user.String(),
+		Token0Address:      mint.String(),
+		Token1Address:      wsolMint,
+		Token0Amount:       formatTokenAmount(tokenAmount),
+		Token1Amount:       formatSolAmount(solAmount),
+		Program:            "Pump",
+		Event:              "buy",
+		IsToken2022:        false,
+		IsMayhemMode:       false,
+		ExactSOL:           true,
+		Block:              tx.Block,
+		Token0AmountUint64: tokenAmount,
+		Token1AmountUint64: solAmount,
+	}, nil
+}