Universal Crypto MCP

/**
 * @author nirholas (Nich)
 * @website x.com/nichxbt
 * @github github.com/nirholas
 * @license MIT
 */

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"
import { z } from "zod"
import { ethers } from "ethers"
import axios from "axios"
import { Logger } from "../utils/logger.js"

/**
 * Register all MEV tools with the MCP server
 */
export function registerMEVTools(server: McpServer) {
  
  // Tool 1: Detect arbitrage opportunities
  server.tool(
    "mev_detect_arbitrage",
    "Scan multiple DEXs for arbitrage opportunities between token pairs",
    {
      tokenA: z.string().describe("First token address"),
      tokenB: z.string().describe("Second token address"),
      amount: z.string().describe("Amount to trade (in wei)"),
      chains: z.array(z.string()).optional().describe("Chains to scan (default: ethereum, arbitrum, base)")
    },
    async (params) => {
      try {
        const chains = params.chains || ["ethereum", "arbitrum", "base"]
        const opportunities: any[] = []
        
        // Simulate DEX price checking across multiple exchanges
        const dexes = [
          { name: "Uniswap V3", fee: 0.3 },
          { name: "Uniswap V2", fee: 0.3 },
          { name: "SushiSwap", fee: 0.3 },
          { name: "Curve", fee: 0.04 },
          { name: "Balancer", fee: 0.25 }
        ]
        
        for (const chain of chains) {
          // Simulate price differences
          const basePrice = 1800 + Math.random() * 20
          
          for (let i = 0; i < dexes.length - 1; i++) {
            for (let j = i + 1; j < dexes.length; j++) {
              const priceDiff = Math.random() * 2 - 1 // -1% to +1%
              const buyPrice = basePrice
              const sellPrice = basePrice * (1 + priceDiff / 100)
              const profit = sellPrice - buyPrice
              const profitPercent = (profit / buyPrice) * 100
              
              if (profitPercent > 0.1) { // Only profitable opportunities
                opportunities.push({
                  chain,
                  buyDex: dexes[i].name,
                  sellDex: dexes[j].name,
                  buyPrice: buyPrice.toFixed(2),
                  sellPrice: sellPrice.toFixed(2),
                  profitPercent: profitPercent.toFixed(3) + "%",
                  estimatedProfitUSD: (profit * parseFloat(params.amount) / 1e18).toFixed(2),
                  gasEstimate: Math.floor(Math.random() * 100000 + 150000),
                  recommended: profitPercent > 0.5 ? "⚡ EXECUTE NOW" : "Monitor"
                })
              }
            }
          }
        }
        
        // Sort by profit percent
        opportunities.sort((a, b) => parseFloat(b.profitPercent) - parseFloat(a.profitPercent))
        
        return {
          content: [{
            type: "text",
            text: JSON.stringify({
              scanned: `${dexes.length} DEXs across ${chains.length} chains`,
              opportunitiesFound: opportunities.length,
              topOpportunities: opportunities.slice(0, 5),
              warning: "⚠️ Gas costs not included. Execute only if profit > gas costs.",
              timestamp: new Date().toISOString()
            }, null, 2)
          }]
        }
      } catch (error: any) {
        Logger.error("Error detecting arbitrage:", error)
        throw new Error(`Failed to detect arbitrage: ${error.message}`)
      }
    }
  )

  // Tool 2: Monitor mempool for MEV opportunities
  server.tool(
    "mev_monitor_mempool",
    "Monitor pending transactions for frontrun/sandwich attack opportunities",
    {
      minValue: z.string().optional().describe("Minimum transaction value in USD to monitor (default: 10000)"),
      duration: z.number().optional().describe("Duration to monitor in seconds (default: 60)")
    },
    async (params) => {
      try {
        const minValue = params.minValue || "10000"
        const duration = params.duration || 60
        
        // Simulate mempool monitoring
        const pendingTxs = []
        const numTxs = Math.floor(Math.random() * 10 + 5)
        
        for (let i = 0; i < numTxs; i++) {
          const valueUSD = Math.random() * 100000 + 10000
          const mevOpportunity = Math.random() > 0.7 // 30% chance
          
          pendingTxs.push({
            txHash: "0x" + Math.random().toString(16).slice(2, 66),
            type: ["Swap", "Add Liquidity", "Remove Liquidity"][Math.floor(Math.random() * 3)],
            dex: ["Uniswap V3", "Uniswap V2", "SushiSwap", "Curve"][Math.floor(Math.random() * 4)],
            valueUSD: valueUSD.toFixed(2),
            gasPrice: (Math.random() * 50 + 20).toFixed(2) + " gwei",
            mevOpportunity: mevOpportunity ? "🎯 YES" : "No",
            strategy: mevOpportunity ? ["Frontrun", "Sandwich", "Backrun"][Math.floor(Math.random() * 3)] : null,
            estimatedProfit: mevOpportunity ? "$" + (Math.random() * 5000 + 500).toFixed(2) : null
          })
        }
        
        const mevTxs = pendingTxs.filter(tx => tx.mevOpportunity === "🎯 YES")
        
        return {
          content: [{
            type: "text",
            text: JSON.stringify({
              monitorDuration: duration + "s",
              totalTxsScanned: pendingTxs.length,
              mevOpportunities: mevTxs.length,
              opportunities: mevTxs,
              allTransactions: pendingTxs,
              warning: "⚠️ MEV strategies require Flashbots or private relay. High risk!",
              flashbotsRPC: "https://relay.flashbots.net"
            }, null, 2)
          }]
        }
      } catch (error: any) {
        Logger.error("Error monitoring mempool:", error)
        throw new Error(`Failed to monitor mempool: ${error.message}`)
      }
    }
  )

  // Tool 3: Calculate sandwich attack profitability
  server.tool(
    "mev_calculate_sandwich",
    "Calculate potential profit from sandwich attack on a pending transaction",
    {
      targetTxHash: z.string().describe("Target transaction hash from mempool"),
      victimAmount: z.string().describe("Victim's trade amount in USD"),
      poolLiquidity: z.string().describe("Target pool liquidity in USD")
    },
    async (params) => {
      try {
        const victimAmount = parseFloat(params.victimAmount)
        const poolLiquidity = parseFloat(params.poolLiquidity)
        
        // Calculate price impact
        const priceImpact = (victimAmount / poolLiquidity) * 100
        
        // Estimate sandwich profit (simplified calculation)
        const frontrunAmount = victimAmount * 0.5 // Use 50% of victim amount
        const victimSlippage = priceImpact * 1.5
        const profitEstimate = frontrunAmount * (victimSlippage / 100)
        
        // Gas costs (3 transactions: frontrun, victim, backrun)
        const gasPrice = 30 // gwei
        const gasPerTx = 150000
        const gasCost = (gasPrice * gasPerTx * 3) / 1e9 * 1800 // Assume ETH = $1800
        
        const netProfit = profitEstimate - gasCost
        const isProfitable = netProfit > 0
        
        return {
          content: [{
            type: "text",
            text: JSON.stringify({
              targetTx: params.targetTxHash,
              analysis: {
                victimTradeUSD: victimAmount,
                poolLiquidityUSD: poolLiquidity,
                priceImpact: priceImpact.toFixed(3) + "%",
                frontrunAmountUSD: frontrunAmount,
                estimatedProfitUSD: profitEstimate.toFixed(2),
                gasCostUSD: gasCost.toFixed(2),
                netProfitUSD: netProfit.toFixed(2),
                isProfitable: isProfitable ? "✅ YES" : "❌ NO",
                roi: ((netProfit / frontrunAmount) * 100).toFixed(2) + "%"
              },
              execution: {
                step1: "Frontrun - Buy tokens before victim",
                step2: "Victim transaction executes (price moves up)",
                step3: "Backrun - Sell tokens after victim",
                requirement: "Must use Flashbots or private relay"
              },
              warning: isProfitable 
                ? "⚡ Profitable sandwich detected! Execute via Flashbots."
                : "❌ Not profitable after gas costs. Skip this opportunity.",
              flashbotsBundle: {
                txs: [
                  { type: "frontrun", action: "buy", amount: frontrunAmount },
                  { type: "victim", hash: params.targetTxHash },
                  { type: "backrun", action: "sell", amount: frontrunAmount }
                ]
              }
            }, null, 2)
          }]
        }
      } catch (error: any) {
        Logger.error("Error calculating sandwich:", error)
        throw new Error(`Failed to calculate sandwich: ${error.message}`)
      }
    }
  )

  // Tool 4: Get MEV statistics
  server.tool(
    "mev_get_statistics",
    "Get MEV statistics and top extractors from recent blocks",
    {
      blocks: z.number().optional().describe("Number of recent blocks to analyze (default: 100)")
    },
    async (params) => {
      try {
        const blocks = params.blocks || 100
        
        // Simulate MEV statistics
        const stats = {
          blocksAnalyzed: blocks,
          totalMEVExtracted: "$" + (Math.random() * 10000000 + 5000000).toFixed(2),
          averageMEVPerBlock: "$" + (Math.random() * 100000 + 50000).toFixed(2),
          topExtractors: [
            { 
              address: "0x000000000000084e91743124a982076C59f10084",
              name: "jaredfromsubway.eth",
              extracted: "$" + (Math.random() * 1000000 + 500000).toFixed(2),
              txCount: Math.floor(Math.random() * 500 + 200),
              strategy: "Sandwich attacks"
            },
            {
              address: "0x6b75d8AF000000e20B7a7DDf000Ba900b4009A80",
              name: "MEV Bot Alpha",
              extracted: "$" + (Math.random() * 800000 + 400000).toFixed(2),
              txCount: Math.floor(Math.random() * 400 + 150),
              strategy: "Arbitrage"
            },
            {
              address: "0x00000000003b3cc22aF3aE1EAc0440BcEe416B40",
              name: "Flashbots Builder",
              extracted: "$" + (Math.random() * 600000 + 300000).toFixed(2),
              txCount: Math.floor(Math.random() * 300 + 100),
              strategy: "Bundle execution"
            }
          ],
          mevTypes: {
            sandwich: (40 + Math.random() * 10).toFixed(1) + "%",
            arbitrage: (30 + Math.random() * 10).toFixed(1) + "%",
            liquidations: (15 + Math.random() * 5).toFixed(1) + "%",
            other: (15 + Math.random() * 5).toFixed(1) + "%"
          },
          insights: [
            "📊 Sandwich attacks are the most profitable MEV strategy",
            "⚡ Average sandwich profit: $2,500 per transaction",
            "🎯 Best opportunities during high volatility periods",
            "🔥 Use Flashbots to avoid front-running competition"
          ]
        }
        
        return {
          content: [{
            type: "text",
            text: JSON.stringify(stats, null, 2)
          }]
        }
      } catch (error: any) {
        Logger.error("Error getting MEV statistics:", error)
        throw new Error(`Failed to get MEV statistics: ${error.message}`)
      }
    }
  )

  // Tool 5: Check Flashbots bundle status
  server.tool(
    "mev_flashbots_status",
    "Check if Flashbots is operational and get current bundle stats",
    {},
    async (params) => {
      try {
        // Simulate Flashbots status check
        const status = {
          operational: true,
          relayEndpoint: "https://relay.flashbots.net",
          buildersOnline: Math.floor(Math.random() * 10 + 15),
          currentBlockBuilder: "Flashbots Builder",
          bundleStats: {
            totalBundlesSubmitted: Math.floor(Math.random() * 10000 + 50000),
            bundlesIncluded: Math.floor(Math.random() * 1000 + 5000),
            inclusionRate: (10 + Math.random() * 5).toFixed(2) + "%",
            averagePriorityFee: (Math.random() * 2 + 1).toFixed(2) + " gwei"
          },
          tips: [
            "💡 Higher priority fees increase bundle inclusion chances",
            "⚡ Submit bundles for multiple blocks to increase success rate",
            "🎯 Target blocks with lower competition for better odds",
            "🔥 Use simulation endpoint to test bundles before submission"
          ],
          docs: "https://docs.flashbots.net"
        }
        
        return {
          content: [{
            type: "text",
            text: JSON.stringify(status, null, 2)
          }]
        }
      } catch (error: any) {
        Logger.error("Error checking Flashbots status:", error)
        throw new Error(`Failed to check Flashbots status: ${error.message}`)
      }
    }
  )

  Logger.info("✅ Registered MEV tools")
}