arb.go

arb.go

package main

import (
    "context"
    "fmt"
    "log"
    "math/big"
    "time"

    "github.com/ethereum/go-ethereum/common"
    "github.com/ethereum/go-ethereum/ethclient"
    "github.com/ethereum/go-ethereum/accounts/abi/bind"
)

// DEX represents a decentralized exchange
type DEX struct {
    Name           string
    RouterAddress  common.Address
    FactoryAddress common.Address
}

// TokenPair represents a pair of tokens for trading
type TokenPair struct {
    TokenA common.Address
    TokenB common.Address
}

// Main arbitrage function
func performArbitrage(client *ethclient.Client, dexes []DEX, tokenPair TokenPair) error {
    for {
        prices, err := fetchPrices(client, dexes, tokenPair)
        if err != nil {
            log.Printf("Error fetching prices: %v", err)
            continue
        }

        buyDex, sellDex, profit := findArbitrageOpportunity(prices)
        if profit.Cmp(big.NewInt(0)) > 0 {
            err := executeArbitrage(client, buyDex, sellDex, tokenPair, profit)
            if err != nil {
                log.Printf("Error executing arbitrage: %v", err)
            }
        }

        time.Sleep(10 * time.Second)
    }
}

// Fetch prices from DEXes
func fetchPrices(client *ethclient.Client, dexes []DEX, tokenPair TokenPair) (map[string]*big.Int, error) {
    prices := make(map[string]*big.Int)

    for _, dex := range dexes {
        // In a real implementation, you would use the actual Router ABI and contract binding
        // This is a placeholder for demonstration
        router, err := NewRouterContract(dex.RouterAddress, client)
        if err != nil {
            return nil, fmt.Errorf("failed to instantiate router contract: %v", err)
        }

        amount := big.NewInt(1e18) // 1 token
        price, err := router.GetAmountsOut(&bind.CallOpts{}, amount, []common.Address{tokenPair.TokenA, tokenPair.TokenB})
        if err != nil {
            return nil, fmt.Errorf("failed to get price from %s: %v", dex.Name, err)
        }

        prices[dex.Name] = price[1] // price[1] is the amount of TokenB you get for 1 TokenA
    }

    return prices, nil
}

// Find arbitrage opportunity
func findArbitrageOpportunity(prices map[string]*big.Int) (string, string, *big.Int) {
    var minDex, maxDex string
    minPrice := new(big.Int).SetInt64(int64(^uint64(0) >> 1)) // Max int64
    maxPrice := big.NewInt(0)

    for dex, price := range prices {
        if price.Cmp(minPrice) < 0 {
            minDex = dex
            minPrice = price
        }
        if price.Cmp(maxPrice) > 0 {
            maxDex = dex
            maxPrice = price
        }
    }

    profit := new(big.Int).Sub(maxPrice, minPrice)
    return minDex, maxDex, profit
}

// Execute arbitrage
func executeArbitrage(client *ethclient.Client, buyDex, sellDex string, tokenPair TokenPair, amount *big.Int) error {
    // Implement buy and sell logic here
    log.Printf("Executing arbitrage: Buy on %s, Sell on %s, Amount: %s", buyDex, sellDex, amount.String())
    return nil
}

func main() {
    client, err := ethclient.Dial("https://mainnet.infura.io/v3/YOUR-PROJECT-ID")
    if err != nil {
        log.Fatalf("Failed to connect to the Ethereum client: %v", err)
    }

    dexes := []DEX{
        {
            Name:           "ApeSwap",
            RouterAddress:  common.HexToAddress("APESWAP_ROUTER_ADDRESS"),
            FactoryAddress: common.HexToAddress("APESWAP_FACTORY_ADDRESS"),
        },
        {
            Name:           "PancakeSwap",
            RouterAddress:  common.HexToAddress("PANCAKESWAP_ROUTER_ADDRESS"),
            FactoryAddress: common.HexToAddress("PANCAKESWAP_FACTORY_ADDRESS"),
        },
        // Add other DEXes here
    }

    tokenPair := TokenPair{
        TokenA: common.HexToAddress("TOKEN_A_ADDRESS"),
        TokenB: common.HexToAddress("TOKEN_B_ADDRESS"),
    }

    if err := performArbitrage(client, dexes, tokenPair); err != nil {
        log.Fatalf("Arbitrage failed: %v", err)
    }
}

// RouterContract is a placeholder for the actual router contract binding
type RouterContract struct {
    // Add necessary fields
}

func NewRouterContract(address common.Address, client *ethclient.Client) (*RouterContract, error) {
    // Implement contract instantiation
    return &RouterContract{}, nil
}

func (r *RouterContract) GetAmountsOut(opts *bind.CallOpts, amountIn *big.Int, path []common.Address) ([]*big.Int, error) {
    // Implement GetAmountsOut logic
    return []*big.Int{big.NewInt(0), big.NewInt(0)}, nil
}