Token Trading Bot System

1. System Overview

The token trading bot system is an automated trading system implemented in Solidity that supports multiple trading strategies and risk management mechanisms. The system implements flexible strategy configuration and comprehensive security controls.

1.1 Main Features

Multi-strategy support: Supports various trading strategies
Risk control: Comprehensive risk management
Automatic execution: Automated trade execution
Real-time monitoring: Market state monitoring
Emergency control: Emergency handling mechanisms

2. Contract Implementation

solidity

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/math/SafeMath.sol";

/**
 * @title TradingBot
 * @dev Automated trading bot contract
 */
contract TradingBot is Ownable, ReentrancyGuard {
    using SafeMath for uint256;

    // Trading strategy
    struct Strategy {
        bool isActive;              // Whether active
        uint256 minAmount;          // Minimum trading amount
        uint256 maxAmount;          // Maximum trading amount
        uint256 priceThreshold;     // Price threshold
        uint256 interval;           // Trading interval
        uint256 lastTradeTime;      // Last trade time
        TradeType tradeType;        // Trade type
        RiskLevel riskLevel;        // Risk level
    }

    // Trade record
    struct TradeRecord {
        uint256 amount;            // Trading amount
        uint256 price;             // Trading price
        uint256 timestamp;         // Trading time
        TradeType tradeType;       // Trade type
        bool isSuccess;            // Whether successful
    }

    // Trade type
    enum TradeType {
        BUY,      // Buy
        SELL,     // Sell
        SWAP      // Swap
    }

    // Risk level
    enum RiskLevel {
        LOW,      // Low risk
        MEDIUM,   // Medium risk
        HIGH      // High risk
    }

    // State variables
    mapping(uint256 => Strategy) public strategies;              // Strategy information
    mapping(uint256 => TradeRecord[]) public tradeRecords;      // Trade records
    mapping(address => bool) public whitelistedTokens;          // Whitelisted tokens
    uint256 public strategyCount;                               // Strategy count
    uint256 public maxStrategies;                               // Maximum strategies
    bool public paused;                                         // Pause status

    // Constants
    uint256 public constant PRECISION = 1e18;                   // Precision
    uint256 public constant MIN_INTERVAL = 5 minutes;           // Minimum interval
    uint256 public constant MAX_SLIPPAGE = 100;                // Maximum slippage (1%)

    // Events
    event StrategyCreated(uint256 indexed strategyId, TradeType tradeType, RiskLevel riskLevel);
    event StrategyUpdated(uint256 indexed strategyId);
    event TradeExecuted(uint256 indexed strategyId, uint256 amount, uint256 price);
    event TokenWhitelisted(address indexed token, bool status);
    event EmergencyStop(address indexed caller);

    /**
     * @dev Constructor
     */
    constructor(uint256 _maxStrategies) {
        maxStrategies = _maxStrategies;
    }

    /**
     * @dev Create trading strategy
     */
    function createStrategy(
        uint256 _minAmount,
        uint256 _maxAmount,
        uint256 _priceThreshold,
        uint256 _interval,
        TradeType _tradeType,
        RiskLevel _riskLevel
    ) external onlyOwner {
        require(strategyCount < maxStrategies, "Max strategies reached");
        require(_interval >= MIN_INTERVAL, "Interval too short");
        require(_maxAmount > _minAmount, "Invalid amounts");

        strategies[strategyCount] = Strategy({
            isActive: true,
            minAmount: _minAmount,
            maxAmount: _maxAmount,
            priceThreshold: _priceThreshold,
            interval: _interval,
            lastTradeTime: 0,
            tradeType: _tradeType,
            riskLevel: _riskLevel
        });

        emit StrategyCreated(strategyCount, _tradeType, _riskLevel);
        strategyCount = strategyCount.add(1);
    }

    /**
     * @dev Update trading strategy
     */
    function updateStrategy(
        uint256 strategyId,
        uint256 _minAmount,
        uint256 _maxAmount,
        uint256 _priceThreshold,
        uint256 _interval
    ) external onlyOwner {
        require(strategyId < strategyCount, "Invalid strategy ID");
        require(_interval >= MIN_INTERVAL, "Interval too short");
        require(_maxAmount > _minAmount, "Invalid amounts");

        Strategy storage strategy = strategies[strategyId];
        strategy.minAmount = _minAmount;
        strategy.maxAmount = _maxAmount;
        strategy.priceThreshold = _priceThreshold;
        strategy.interval = _interval;

        emit StrategyUpdated(strategyId);
    }

    /**
     * @dev Execute trade
     */
    function executeTrade(
        uint256 strategyId,
        address tokenIn,
        address tokenOut,
        uint256 amount,
        uint256 price
    ) external nonReentrant {
        require(!paused, "Trading paused");
        require(strategyId < strategyCount, "Invalid strategy ID");
        require(whitelistedTokens[tokenIn] && whitelistedTokens[tokenOut], "Token not whitelisted");

        Strategy storage strategy = strategies[strategyId];
        require(strategy.isActive, "Strategy not active");
        require(
            block.timestamp >= strategy.lastTradeTime.add(strategy.interval),
            "Too frequent"
        );
        require(amount >= strategy.minAmount && amount <= strategy.maxAmount, "Invalid amount");

        // Check price conditions
        require(checkPriceCondition(strategy, price), "Price condition not met");

        // Execute trade
        bool success = performTrade(strategy.tradeType, tokenIn, tokenOut, amount, price);
        require(success, "Trade failed");

        // Record trade
        tradeRecords[strategyId].push(TradeRecord({
            amount: amount,
            price: price,
            timestamp: block.timestamp,
            tradeType: strategy.tradeType,
            isSuccess: true
        }));

        strategy.lastTradeTime = block.timestamp;
        emit TradeExecuted(strategyId, amount, price);
    }

    /**
     * @dev Check price conditions
     */
    function checkPriceCondition(Strategy memory strategy, uint256 price) internal pure returns (bool) {
        if (strategy.tradeType == TradeType.BUY) {
            return price <= strategy.priceThreshold;
        } else if (strategy.tradeType == TradeType.SELL) {
            return price >= strategy.priceThreshold;
        }
        return true; // For SWAP type
    }

    /**
     * @dev Perform specific trade
     */
    function performTrade(
        TradeType tradeType,
        address tokenIn,
        address tokenOut,
        uint256 amount,
        uint256 price
    ) internal returns (bool) {
        if (tradeType == TradeType.BUY) {
            return executeBuy(tokenIn, tokenOut, amount, price);
        } else if (tradeType == TradeType.SELL) {
            return executeSell(tokenIn, tokenOut, amount, price);
        } else {
            return executeSwap(tokenIn, tokenOut, amount);
        }
    }

    /**
     * @dev Execute buy
     */
    function executeBuy(
        address tokenIn,
        address tokenOut,
        uint256 amount,
        uint256 price
    ) internal returns (bool) {
        // Implement buy logic
        return true;
    }

    /**
     * @dev Execute sell
     */
    function executeSell(
        address tokenIn,
        address tokenOut,
        uint256 amount,
        uint256 price
    ) internal returns (bool) {
        // Implement sell logic
        return true;
    }

    /**
     * @dev Execute swap
     */
    function executeSwap(
        address tokenIn,
        address tokenOut,
        uint256 amount
    ) internal returns (bool) {
        // Implement swap logic
        return true;
    }

    /**
     * @dev Set whitelisted tokens
     */
    function setTokenWhitelist(address token, bool status) external onlyOwner {
        whitelistedTokens[token] = status;
        emit TokenWhitelisted(token, status);
    }

    /**
     * @dev Pause/resume trading
     */
    function setPaused(bool _paused) external onlyOwner {
        paused = _paused;
        if (_paused) {
            emit EmergencyStop(msg.sender);
        }
    }

    /**
     * @dev Activate/deactivate strategy
     */
    function setStrategyActive(uint256 strategyId, bool active) external onlyOwner {
        require(strategyId < strategyCount, "Invalid strategy ID");
        strategies[strategyId].isActive = active;
    }

    /**
     * @dev Get strategy information
     */
    function getStrategy(uint256 strategyId) external view returns (
        bool isActive,
        uint256 minAmount,
        uint256 maxAmount,
        uint256 priceThreshold,
        uint256 interval,
        uint256 lastTradeTime,
        TradeType tradeType,
        RiskLevel riskLevel
    ) {
        require(strategyId < strategyCount, "Invalid strategy ID");
        Strategy storage strategy = strategies[strategyId];
        return (
            strategy.isActive,
            strategy.minAmount,
            strategy.maxAmount,
            strategy.priceThreshold,
            strategy.interval,
            strategy.lastTradeTime,
            strategy.tradeType,
            strategy.riskLevel
        );
    }

    /**
     * @dev Get trade record count
     */
    function getTradeRecordCount(uint256 strategyId) external view returns (uint256) {
        return tradeRecords[strategyId].length;
    }

    /**
     * @dev Get trade record
     */
    function getTradeRecord(uint256 strategyId, uint256 index) external view returns (
        uint256 amount,
        uint256 price,
        uint256 timestamp,
        TradeType tradeType,
        bool isSuccess
    ) {
        require(strategyId < strategyCount, "Invalid strategy ID");
        require(index < tradeRecords[strategyId].length, "Invalid index");
        
        TradeRecord storage record = tradeRecords[strategyId][index];
        return (
            record.amount,
            record.price,
            record.timestamp,
            record.tradeType,
            record.isSuccess
        );
    }

    /**
     * @dev Get trade records in batches
     */
    function getTradeRecords(
        uint256 strategyId,
        uint256 offset,
        uint256 limit
    ) external view returns (
        uint256[] memory amounts,
        uint256[] memory prices,
        uint256[] memory timestamps,
        TradeType[] memory tradeTypes,
        bool[] memory successes
    ) {
        require(strategyId < strategyCount, "Invalid strategy ID");
        require(offset < tradeRecords[strategyId].length, "Invalid offset");

        uint256 end = offset.add(limit);
        if (end > tradeRecords[strategyId].length) {
            end = tradeRecords[strategyId].length;
        }
        uint256 size = end.sub(offset);

        amounts = new uint256[](size);
        prices = new uint256[](size);
        timestamps = new uint256[](size);
        tradeTypes = new TradeType[](size);
        successes = new bool[](size);

        for (uint256 i = 0; i < size; i++) {
            TradeRecord storage record = tradeRecords[strategyId][offset.add(i)];
            amounts[i] = record.amount;
            prices[i] = record.price;
            timestamps[i] = record.timestamp;
            tradeTypes[i] = record.tradeType;
            successes[i] = record.isSuccess;
        }

        return (amounts, prices, timestamps, tradeTypes, successes);
    }
}

3. Function Description

3.1 Strategy Management

Create strategy
Update strategy
Activate/deactivate strategy

3.2 Trade Execution

Automated trading
Price check
Trade records

3.3 Risk Control

Whitelist management
Trade restrictions
Emergency pause

4. Security Mechanisms

4.1 Trade Control

Minimum trading interval
Trade amount restrictions
Slippage protection

4.2 Access Control

Permission management
Reentrancy protection
Parameter validation

4.3 Risk Management

Strategy risk level
Trade monitoring
Emergency handling

5. Usage Examples

5.1 Create Strategy

javascript

const minAmount = ethers.utils.parseEther("1");
const maxAmount = ethers.utils.parseEther("10");
const priceThreshold = ethers.utils.parseEther("100");
const interval = 3600; // 1 hour
await tradingBot.createStrategy(minAmount, maxAmount, priceThreshold, interval, 0, 0);

5.2 Execute Trade

javascript

const amount = ethers.utils.parseEther("5");
const price = ethers.utils.parseEther("98");
await tradingBot.executeTrade(0, tokenA.address, tokenB.address, amount, price);

5.3 Query Records

javascript

const records = await tradingBot.getTradeRecords(0, 0, 10);
console.log("Trade records:", records);

6. Summary

The token trading bot system implements a complete automated trading function, including:

Multi-strategy management
Automated trade execution
Risk control mechanisms
Trade record management
Emergency handling function

The system ensures the security and reliability of the trading process through carefully designed strategy management and risk control mechanisms.

Frequently Asked Questions (FAQ)

1. Basic Concepts

Q: What is a trading bot? A: A trading bot is an automated trading system with the following characteristics:

Automated execution of trading strategies
Real-time market monitoring
Quick response to price changes
Risk control management
24/7 operation without interruption

Q: What are the advantages of a trading bot? A: The main advantages include:

Eliminating emotional trading
High execution speed
24/7 operation
Strict risk control
Consistent execution of strategies

Q: How to create a trading strategy? A: The steps are as follows:

solidity

// 1. Set strategy parameters
const minAmount = ethers.utils.parseEther("1");
const maxAmount = ethers.utils.parseEther("10");
const priceThreshold = ethers.utils.parseEther("100");
const interval = 3600; // 1 hour

// 2. Create strategy
await tradingBot.createStrategy(
    minAmount,
    maxAmount,
    priceThreshold,
    interval,
    TradeType.BUY,
    RiskLevel.MEDIUM
);

Q: How to monitor trade execution? A: Monitoring methods include:

Event listening
Status query
Trade record tracking
Performance indicator monitoring
Risk indicator tracking

Q: What are the risks of a trading bot? A: The main risks include:

Market risk
Technical risk
Strategy risk
Liquidity risk
Operational risk

Q: How to protect trading security? A: Security measures include:

Whitelist mechanism
Trade limits
Frequency control
Emergency pause
Multi-factor verification

Q: How to optimize trading performance? A: Optimization strategies:

Batch processing
Gas optimization
Routing optimization
Slippage control
Timing selection

Q: How to improve trading success rate? A: Improvement solutions:

Market analysis
Price prediction
Risk assessment
Strategy optimization
Execution optimization

5. Implementation details

Q: How to handle trade failures? A: Failure handling mechanism:

solidity

function handleFailedTrade(uint256 strategyId, string memory reason) internal {
    // 1. Record failure
    // 2. Notify monitoring
    // 3. Adjust strategy
    // 4. Retry mechanism
    // 5. Risk control
}

Q: How to implement risk control? A: Control mechanisms:

Stop loss setting
Position control
Risk rating
Warning mechanism
Emergency handling

6. Best practices

Q: What are the suggestions for strategy development? A: Development suggestions:

Thorough testing
Risk assessment
Step-by-step implementation
Continuous monitoring
Regular optimization

Q: How to improve strategy effectiveness? A: Optimization directions:

Data analysis
Strategy backtesting
Parameter optimization
Risk management
Performance tuning

7. Error handling

Q: Common errors and solutions? A: Error types:

"Price condition not met": Check price threshold
"Invalid amount": Verify trading amount
"Too frequent": Wait for the interval time
"Strategy not active": Check strategy status
"Token not whitelisted": Confirm whitelisted tokens

Q: How to handle abnormal situations? A: Handling mechanisms:

Automatic pause
Fund protection
Status recovery
Log recording
Alarm notification

8. Upgrade and maintenance

Q: How to upgrade the trading system? A: Upgrade solutions:

Version management
Compatibility testing
Smooth upgrade
Data migration
Rollback mechanism

Q: How to monitor system status? A: Monitoring solutions:

Performance monitoring
Trade tracking
Risk indicators
Fund status
System logs

9. Integration with other systems

Q: How to integrate with DeFi protocols? A: Integration solutions:

Interface adaptation
Liquidity management
Price oracle
Risk sharing
Revenue optimization

Q: How to implement cross-chain trading? A: Implementation strategies:

Cross-chain bridging
Asset mapping
State synchronization
Risk control
Performance optimization

Token Trading Bot System ​

1. System Overview ​

1.1 Main Features ​

2. Contract Implementation ​

3. Function Description ​

3.1 Strategy Management ​

3.2 Trade Execution ​

3.3 Risk Control ​

4. Security Mechanisms ​

4.1 Trade Control ​

4.2 Access Control ​

4.3 Risk Management ​

5. Usage Examples ​

5.1 Create Strategy ​

5.2 Execute Trade ​

5.3 Query Records ​

6. Summary ​

Frequently Asked Questions (FAQ) ​

1. Basic Concepts ​

2. Function-related ​

3. Security-related ​

4. Optimization-related ​

5. Implementation details ​

6. Best practices ​

7. Error handling ​

8. Upgrade and maintenance ​

9. Integration with other systems ​

Token Trading Bot System

1. System Overview

1.1 Main Features

2. Contract Implementation

3. Function Description

3.1 Strategy Management

3.2 Trade Execution

3.3 Risk Control

4. Security Mechanisms

4.1 Trade Control

4.2 Access Control

4.3 Risk Management

5. Usage Examples

5.1 Create Strategy

5.2 Execute Trade

5.3 Query Records

6. Summary

Frequently Asked Questions (FAQ)

1. Basic Concepts

2. Function-related

3. Security-related

4. Optimization-related

5. Implementation details

6. Best practices

7. Error handling

8. Upgrade and maintenance

9. Integration with other systems