/
main.go
163 lines (134 loc) · 4.11 KB
/
main.go
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package main
import (
"context"
"log"
"math/big"
"os"
"os/signal"
"strings"
"syscall"
"github.com/Planxnx/defi-tx-kit/contract"
"github.com/Planxnx/defi-tx-kit/enums"
"github.com/Planxnx/defi-tx-kit/txfeeder"
"github.com/Planxnx/defi-tx-kit/utils"
"github.com/ethereum/go-ethereum"
"github.com/ethereum/go-ethereum/common"
)
type LP struct {
Address common.Address
Token0 *Token
Token1 *Token
Dex string
IsBaseToken0 bool
Chain utils.Chain
}
type Token struct {
Symbol string
Address common.Address
Chain utils.Chain
}
var TokenData = map[string]*Token{
"0xe9e7cea3dedca5984780bafc599bd69add087d56": {
Symbol: "BUSD",
Address: common.HexToAddress("0xe9e7cea3dedca5984780bafc599bd69add087d56"),
Chain: utils.ChainBinanceSmartChain,
},
"0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c": {
Symbol: "BNB",
Address: common.HexToAddress("0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c"),
Chain: utils.ChainBinanceSmartChain,
},
}
var lpData = map[string]*LP{
"0x58f876857a02d6762e0101bb5c46a8c1ed44dc16": {
Chain: utils.ChainBinanceSmartChain,
Address: common.HexToAddress("0x58f876857a02d6762e0101bb5c46a8c1ed44dc16"),
Token0: TokenData["0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c"],
Token1: TokenData["0xe9e7cea3dedca5984780bafc599bd69add087d56"],
IsBaseToken0: true,
Dex: "Pancakeswap v2",
},
"0xaCAac9311b0096E04Dfe96b6D87dec867d3883Dc": {
Chain: utils.ChainBinanceSmartChain,
Address: common.HexToAddress("0xaCAac9311b0096E04Dfe96b6D87dec867d3883Dc"),
Token0: TokenData["0xbb4cdb9cbd36b01bd1cbaebf2de08d9173bc095c"],
Token1: TokenData["0xe9e7cea3dedca5984780bafc599bd69add087d56"],
IsBaseToken0: true,
Dex: "Biswap",
},
}
func main() {
ctx := context.Background()
client, err := utils.ChainBinanceSmartChain.GetWSClient(ctx)
if err != nil {
log.Fatal(err)
}
defer client.Close()
// Event Filter
queryPair := ethereum.FilterQuery{
// Addresses: []common.Address{common.HexToAddress("0x58f876857a02d6762e0101bb5c46a8c1ed44dc16")},
}
txFeederClient := txfeeder.New(client)
txFeederClient.AddSwapLogsHandler(ctx, queryPair, func(swapData *contract.PairSwap) error {
lp, ok := lpData[strings.ToLower(swapData.Raw.Address.String())]
if !ok {
return nil
}
var side enums.SwapTxSide
var swapRate *big.Float
if lp.IsBaseToken0 {
if swapData.Amount0Out.Sign() > 0 {
side = enums.SwapBuy
} else if swapData.Amount0In.Sign() > 0 {
side = enums.SwapSell
} else {
log.Fatal("Error: cannot find swap side")
}
var amount0, amount1 *big.Float
if side == enums.SwapBuy {
amount0 = big.NewFloat(0).SetInt(swapData.Amount0Out)
amount1 = big.NewFloat(0).SetInt(swapData.Amount1In)
} else {
amount0 = big.NewFloat(0).SetInt(swapData.Amount0In)
amount1 = big.NewFloat(0).SetInt(swapData.Amount1Out)
}
swapRate = big.NewFloat(0).Quo(amount1, amount0)
} else {
if swapData.Amount1Out.Sign() > 0 {
side = enums.SwapBuy
} else if swapData.Amount1In.Sign() > 0 {
side = enums.SwapSell
} else {
log.Fatal("Error: cannot find swap side")
}
var amount0, amount1 *big.Float
if side == enums.SwapBuy {
amount0 = big.NewFloat(0).SetInt(swapData.Amount0In)
amount1 = big.NewFloat(0).SetInt(swapData.Amount1Out)
} else {
amount0 = big.NewFloat(0).SetInt(swapData.Amount0Out)
amount1 = big.NewFloat(0).SetInt(swapData.Amount1In)
}
swapRate = big.NewFloat(0).Quo(amount0, amount1)
}
log.Printf("%v: %v %v\n", side, swapRate, lp.Token1.Symbol)
return nil
})
log.Println("== Tx Logs Ticker ==")
txFeederClient.Run()
// Graceful shutdown
signalChan := make(chan os.Signal, 1)
signal.Notify(
signalChan,
syscall.SIGHUP, // kill -SIGHUP XXXX
syscall.SIGINT, // kill -SIGINT XXXX or Ctrl+c
syscall.SIGQUIT, // kill -SIGQUIT XXXX
syscall.SIGTERM, // kill -SIGTERM XXXX
)
<-signalChan
log.Println("os.Interrupt - shutting down...")
if err := txFeederClient.Close(); err != nil {
log.Printf("Error while closing TXFeeder, %+v\n", err)
}
defer log.Println("gracefully stopped server")
}