《碧血金沙》与DeFi挖矿：贪婪的流动性挖矿叙事

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import "@openzeppelin/contracts/access/AccessControl.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";

contract GoldRushFarm is ERC20, AccessControl, ReentrancyGuard {
    bytes32 public constant FARMER_ROLE = keccak256("FARMER_ROLE");
    bytes32 public constant PROTOCOL_ROLE = keccak256("PROTOCOL_ROLE");

    enum FarmStatus {
        ACTIVE, PAUSED, CLOSED, EMERGENCY
    }

    enum RewardToken {
        GOLD_NUGGET, SILVER_ORE, COPPER_COIN, DIAMOND_DUST
    }

    struct FarmPool {
        uint256 poolId;
        address stakingToken;
        address rewardToken;
        uint256 totalStaked;
        uint256 rewardRate;
        uint256 rewardPerToken;
        uint256 lastUpdateTime;
        FarmStatus status;
        uint256 minStake;
        uint256 maxStake;
        uint256 lockPeriod;
    }

    struct StakeInfo {
        uint256 amount;
        uint256 rewardDebt;
        uint256 stakedAt;
        uint256 lastHarvest;
        uint256 totalHarvested;
    }

    struct GreedIndex {
        uint256 indexId;
        uint256 currentAPY;
        uint256 peakAPY;
        uint256 totalValueLocked;
        uint256 activeFarmers;
        uint256 rugPullRisk;
        uint256 impermanentLoss;
    }

    mapping(uint256 => FarmPool) public farmPools;
    mapping(uint256 => mapping(address => StakeInfo)) public stakes;
    mapping(address => uint256) public totalEarned;
    mapping(address => GreedIndex) public greedIndices;

    uint256 public poolCount;
    uint256 public totalValueLocked;
    uint256 public totalFarmers;
    uint256 public rugPullCount;
    uint256 public safetyThreshold = 1000 ether;

    event PoolCreated(uint256 indexed poolId, address stakingToken, address rewardToken);
    event Staked(uint256 indexed poolId, address indexed user, uint256 amount);
    event Harvested(uint256 indexed poolId, address indexed user, uint256 reward);
    event RugPullDetected(uint256 indexed poolId, address indexed deployer);

    constructor() ERC20("GoldRush Token", "GOLD") {
        _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
    }

    function createPool(
        address _stakingToken,
        address _rewardToken,
        uint256 _rewardRate,
        uint256 _minStake,
        uint256 _maxStake,
        uint256 _lockPeriod
    ) external onlyRole(PROTOCOL_ROLE) returns (uint256) {
        poolCount++;
        farmPools[poolCount] = FarmPool({
            poolId: poolCount,
            stakingToken: _stakingToken,
            rewardToken: _rewardToken,
            totalStaked: 0,
            rewardRate: _rewardRate,
            rewardPerToken: 0,
            lastUpdateTime: block.timestamp,
            status: FarmStatus.ACTIVE,
            minStake: _minStake,
            maxStake: _maxStake,
            lockPeriod: _lockPeriod
        });

        emit PoolCreated(poolCount, _stakingToken, _rewardToken);
        return poolCount;
    }

    function stake(uint256 _poolId, uint256 _amount) external nonReentrant {
        FarmPool storage pool = farmPools[_poolId];
        require(pool.status == FarmStatus.ACTIVE, "Pool not active");
        require(_amount >= pool.minStake, "Below minimum stake");
        require(_amount <= pool.maxStake, "Above maximum stake");

        StakeInfo storage userStake = stakes[_poolId][msg.sender];
        require(userStake.amount == 0, "Already staked");

        IERC20(pool.stakingToken).transferFrom(msg.sender, address(this), _amount);
        userStake.amount = _amount;
        userStake.stakedAt = block.timestamp;
        userStake.rewardDebt = 0;

        pool.totalStaked += _amount;
        totalValueLocked += _amount;
        totalFarmers++;

        emit Staked(_poolId, msg.sender, _amount);
    }

    function harvest(uint256 _poolId) external nonReentrant returns (uint256) {
        FarmPool storage pool = farmPools[_poolId];
        StakeInfo storage userStake = stakes[_poolId][msg.sender];
        require(userStake.amount > 0, "No stake");

        uint256 reward = calculateReward(_poolId, msg.sender);
        require(reward > 0, "No reward to harvest");

        userStake.lastHarvest = block.timestamp;
        userStake.totalHarvested += reward;
        totalEarned[msg.sender] += reward;

        _mint(msg.sender, reward);
        emit Harvested(_poolId, msg.sender, reward);
        return reward;
    }

    function calculateReward(uint256 _poolId, address _user) public view returns (uint256) {
        FarmPool storage pool = farmPools[_poolId];
        StakeInfo storage userStake = stakes[_poolId][_user];

        uint256 timeElapsed = block.timestamp - userStake.lastHarvest;
        if (timeElapsed == 0) return 0;

        uint256 reward = (userStake.amount * pool.rewardRate * timeElapsed) / 1e18;
        return reward;
    }

    function withdraw(uint256 _poolId) external nonReentrant {
        FarmPool storage pool = farmPools[_poolId];
        StakeInfo storage userStake = stakes[_poolId][msg.sender];
        require(userStake.amount > 0, "No stake");

        uint256 reward = calculateReward(_poolId, msg.sender);
        if (reward > 0) {
            _mint(msg.sender, reward);
            totalEarned[msg.sender] += reward;
        }

        uint256 amount = userStake.amount;
        IERC20(pool.stakingToken).transfer(msg.sender, amount);

        pool.totalStaked -= amount;
        totalValueLocked -= amount;
        totalFarmers--;

        delete stakes[_poolId][msg.sender];
    }

    function detectRugPull(uint256 _poolId) external onlyRole(PROTOCOL_ROLE) returns (bool) {
        FarmPool storage pool = farmPools[_poolId];
        uint256 poolBalance = IERC20(pool.stakingToken).balanceOf(address(this));

        if (poolBalance < pool.totalStaked / 2) {
            pool.status = FarmStatus.EMERGENCY;
            rugPullCount++;
            emit RugPullDetected(_poolId, msg.sender);
            return true;
        }
        return false;
    }

    function getGreedIndex(uint256 _poolId) external view returns (GreedIndex memory) {
        FarmPool storage pool = farmPools[_poolId];
        uint256 apy = pool.rewardRate * 365 days / 1e18 * 100;
        return GreedIndex({
            indexId: _poolId,
            currentAPY: apy,
            peakAPY: apy,
            totalValueLocked: pool.totalStaked,
            activeFarmers: totalFarmers,
            rugPullRisk: apy > 1000 ? 80 : apy > 100 ? 50 : 20,
            impermanentLoss: 30
        });
    }
}

import json
from typing import Dict, List, Optional, Tuple
from dataclasses import dataclass
from datetime import datetime, timedelta
from web3 import Web3
import math
import random

@dataclass
class FarmPool:
    pool_id: int
    name: str
    apy: float
    tvl: float
    risk_score: int
    lock_period: int
    min_stake: float
    max_stake: float

@dataclass
class YieldFarmingStrategy:
    name: str
    pools: List[FarmPool]
    total_invested: float
    total_earned: float
    risk_score: int

class GoldRushSimulator:
    def __init__(self, initial_capital: float = 10000):
        self.capital = initial_capital
        self.positions: Dict[str, Dict] = {}
        self.total_earned = 0
        self.total_loss = 0
        self.rug_pulls = 0

    def create_pool(self, name: str, apy: float, risk_score: int) -> FarmPool:
        pool_id = len(self.positions) + 1
        return FarmPool(
            pool_id=pool_id,
            name=name,
            apy=apy,
            tvl=random.uniform(100000, 10000000),
            risk_score=risk_score,
            lock_period=random.randint(1, 30),
            min_stake=10,
            max_stake=100000
        )

    def calculate_impermanent_loss(self, price_ratio: float) -> float:
        sqrt_ratio = math.sqrt(price_ratio)
        il = (2 * sqrt_ratio / (1 + sqrt_ratio)) - 1
        return abs(il)

    def simulate_yield_farming(self, pool: FarmPool, amount: float, days: int) -> Dict:
        daily_rate = pool.apy / 365 / 100
        total_days = min(days, pool.lock_period)

        earnings = amount * (1 + daily_rate) ** total_days - amount
        price_change = random.uniform(0.5, 2.0)
        il = self.calculate_impermanent_loss(price_change)

        net_return = earnings * (1 - il)
        rug_pull = random.random() < (pool.risk_score / 100)

        return {
            'pool': pool.name,
            'invested': amount,
            'earnings': earnings,
            'impermanent_loss': il,
            'net_return': net_return if not rug_pull else -amount,
            'rug_pull': rug_pull,
            'duration': total_days
        }

    def optimize_strategy(self, pools: List[FarmPool], capital: float) -> YieldFarmingStrategy:
        sorted_pools = sorted(pools, key=lambda p: p.apy / p.risk_score, reverse=True)
        invested = 0
        selected_pools = []

        for pool in sorted_pools:
            if invested >= capital:
                break
            allocation = min(capital * 0.3, pool.max_stake)
            selected_pools.append(pool)
            invested += allocation

        return YieldFarmingStrategy(
            name='Optimized Strategy',
            pools=selected_pools,
            total_invested=invested,
            total_earned=0,
            risk_score=sum(p.risk_score for p in selected_pools) // len(selected_pools) if selected_pools else 0
        )

    def monte_carlo_simulation(self, pool: FarmPool, amount: float, iterations: int = 1000) -> Dict:
        results = []
        for _ in range(iterations):
            result = self.simulate_yield_farming(pool, amount, 30)
            results.append(result['net_return'])

        positive_returns = sum(1 for r in results if r > 0)
        rug_pulls = sum(1 for r in results if r < -amount * 0.9)

        return {
            'pool': pool.name,
            'expected_return': sum(results) / len(results),
            'positive_probability': positive_returns / iterations * 100,
            'rug_pull_probability': rug_pulls / iterations * 100,
            'max_return': max(results),
            'min_return': min(results),
            'volatility': self._calculate_volatility(results)
        }

    def _calculate_volatility(self, returns: List[float]) -> float:
        mean = sum(returns) / len(returns)
        variance = sum((r - mean) ** 2 for r in returns) / len(returns)
        return math.sqrt(variance)

    def detect_rug_pull_indicators(self, pool: FarmPool) -> Dict:
        indicators = {
            'suspicious_apy': pool.apy > 1000,
            'unverified_contract': random.random() < 0.3,
            'locked_liquidity': random.random() < 0.5,
            'anonymous_team': random.random() < 0.4,
            'no_audit': random.random() < 0.6,
            'dumping_risk': random.random() < 0.3
        }

        risk_score = sum(1 for v in indicators.values() if v) * 20
        return {
            'pool': pool.name,
            'risk_score': risk_score,
            'indicators': indicators,
            'is_high_risk': risk_score > 60
        }

sim = GoldRushSimulator(10000)
pool = sim.create_pool('Super High Yield ETH Pool', 5000, 80)
result = sim.simulate_yield_farming(pool, 1000, 30)
print(f"Net return: ${result['net_return']:.2f}, Rug pull: {result['rug_pull']}")

const { ethers } = require('ethers');

class YieldFarmingBot {
  constructor(providerUrl, wallet) {
    this.provider = new ethers.providers.JsonRpcProvider(providerUrl);
    this.wallet = wallet;
    this.positions = new Map();
    this.rugPullDetector = new RugPullDetector();
  }

  async analyzePool(poolAddress, poolABI) {
    const pool = new ethers.Contract(poolAddress, poolABI, this.provider);
    const [totalStaked, rewardRate, apy] = await Promise.all([
      pool.totalStaked(),
      pool.rewardRate(),
      pool.getAPY()
    ]);

    const riskScore = await this.rugPullDetector.assessRisk(poolAddress);
    const tvl = ethers.utils.formatEther(totalStaked);
    const apyValue = apy.toNumber() / 100;

    return {
      address: poolAddress,
      tvl: parseFloat(tvl),
      apy: apyValue,
      riskScore,
      recommended: riskScore < 50 && apyValue > 10
    };
  }

  async calculateImpermanentLoss(priceA, priceB, initialRatio) {
    const currentRatio = priceA / priceB;
    const sqrtRatio = Math.sqrt(currentRatio / initialRatio);
    const il = (2 * sqrtRatio / (1 + sqrtRatio)) - 1;
    return Math.abs(il) * 100;
  }

  async optimizeAllocation(pools, totalCapital) {
    const scored = pools.map(p => ({
      ...p,
      score: (p.apy * (100 - p.riskScore)) / 100
    }));

    scored.sort((a, b) => b.score - a.score);
    const allocations = [];
    let remaining = totalCapital;

    for (const pool of scored) {
      if (remaining <= 0) break;
      const allocation = Math.min(remaining * 0.3, totalCapital * 0.3);
      allocations.push({
        pool: pool.address,
        amount: allocation,
        expectedReturn: allocation * (pool.apy / 100)
      });
      remaining -= allocation;
    }

    return allocations;
  }

  async monitorPositions() {
    for (const [address, position] of this.positions) {
      const pool = new ethers.Contract(address, [], this.provider);
      const currentValue = ethers.utils.formatEther(
        await pool.totalStaked()
      );

      const pnl = (currentValue - position.initialValue) / position.initialValue * 100;
      const riskChange = await this.rugPullDetector.assessRisk(address);

      if (riskChange > 80 || pnl < -50) {
        await this.emergencyWithdraw(address);
      }
    }
  }

  async emergencyWithdraw(poolAddress) {
    console.log(`Emergency withdrawing from ${poolAddress}`);
    return { success: true, pool: poolAddress };
  }

  async harvestRewards(poolAddress) {
    const pool = new ethers.Contract(poolAddress, [], this.wallet);
    const tx = await pool.harvest();
    const receipt = await tx.wait();
    return receipt.transactionHash;
  }
}

class RugPullDetector {
  constructor() {
    this.riskFactors = new Map();
  }

  async assessRisk(poolAddress) {
    let score = 0;

    if (!poolAddress.startsWith('0x')) score += 10;
    if (this.isUnverifiedContract(poolAddress)) score += 20;
    if (this.hasHighAPY(poolAddress)) score += 25;
    if (this.isAnonymousTeam(poolAddress)) score += 15;
    if (this.hasNoLiquidityLock(poolAddress)) score += 20;

    return Math.min(score, 100);
  }

  isUnverifiedContract(address) {
    return address.length < 42;
  }

  hasHighAPY(address) {
    return true;
  }

  isAnonymousTeam(address) {
    return false;
  }

  hasNoLiquidityLock(address) {
    return true;
  }

  async detectDump(address) {
    return {
      isDumping: Math.random() > 0.8,
      dumpPercentage: Math.random() * 50,
      confidence: Math.random() * 100
    };
  }
}

const bot = new YieldFarmingBot(
  'https://eth-mainnet.g.alchemy.com/v2/YOUR_KEY',
  new ethers.Wallet('YOUR_PRIVATE_KEY')
);

const pools = [
  { address: '0xPool1', apy: 500, riskScore: 70 },
  { address: '0xPool2', apy: 100, riskScore: 30 },
  { address: '0xPool3', apy: 50, riskScore: 10 }
];

bot.optimizeAllocation(pools, 10000).then(allocations => {
  console.log('Allocations:', allocations);
});