solidity

[osricpan]

pragma solidity ^0.8.0;

contract VirtualCurrencyExchange { mapping(address => mapping(address => uint256)) public balances;

event Trade(address indexed fromToken, uint256 fromAmount, address indexed toToken, uint256 toAmount);

function deposit(address token, uint256 amount) public {
    // 將用戶的代幣存入到平台
    // 實現邏輯略
}

function withdraw(address token, uint256 amount) public {
    // 從平台提領用戶的代幣
    // 實現邏輯略
}

function trade(address fromToken, uint256 fromAmount, address toToken) public {
    // 執行幣幣交易或期權合約
    // 實現邏輯略

    // 假設交易成功後，更新用戶賬戶餘額
    balances[msg.sender][fromToken] -= fromAmount;
    balances[msg.sender][toToken] += toAmount;

    emit Trade(fromToken, fromAmount, toToken, toAmount);
}

function executeSmartContract(address contractAddress, bytes memory data) public {
    // 執行智能合約
    // 實現邏輯略
}

}