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