add shreder sell decode

pkg/shreder/tx.go

@@ -0,0 +1,45 @@
+package shreder
+
+import (
+	"time"
+
+	"github.com/shopspring/decimal"
+)
+
+const (
+	TokenDecimals = 6
+	SolDecimals   = 9
+)
+
+type TxSignal struct {
+	Source        string          `json:"source"`
+	TxHash        string          `json:"tx_hash"`
+	Maker         string          `json:"maker"`
+	Token0Address string          `json:"token0_address"`
+	Token1Address string          `json:"token1_address"`
+	Token0Amount  decimal.Decimal `json:"token0_amount"`
+	Token1Amount  decimal.Decimal `json:"token1_amount"`
+	Block         uint64          `json:"block"`
+	BlockAt       time.Time       `json:"block_at"`
+	BlockIndex    uint64          `json:"block_index"`
+	Event         string          `json:"event"`
+	Program       string          `json:"program"`
+	IsProcessed   bool            `json:"is_processed"`
+	IsToken2022   bool            `json:"is_token2022"`
+	IsMayhemMode  bool            `json:"is_mayhem_mode"`
+	TxFee         decimal.Decimal `json:"tx_fee"`
+
+	ExactSOL bool `json:"exact_in"`
+
+	// parsed values
+	Token0AmountUint64 uint64 `json:"-"`
+	Token1AmountUint64 uint64 `json:"-"`
+}
+
+func (t *TxSignal) Parse() *TxSignal {
+	t.Token0AmountUint64 = t.Token0Amount.Mul(decimal.New(1, TokenDecimals)).BigInt().Uint64()
+	t.Token1AmountUint64 = t.Token1Amount.Mul(decimal.New(1, SolDecimals)).BigInt().Uint64()
+	return t
+}
+
+type TxSignalBatch = []*TxSignal