Polygon马蹄链链智能合约代币系统开发（详细及案例）

一个简单的 PHP 代码示例，实现了一个简单的交易所，命名为Polygon公链智能合约。

phpCopy code<?php// Polygon公链智能合约class BOWExchange {
    private $tokens = array(); // 存储交易对
    private $balances = array(); // 存储用户余额
    function __construct() {
            // 初始化交易对和用户余额
        $this->tokens['BOW/ETH'] = array('BOW', 'ETH');
                $this->balances['user1'] = array('BOW' => 100, 'ETH' => 5);
                        $this->balances['user2'] = array('BOW' => 50, 'ETH' => 10);
                        
    }
    
        // 返回当前交易对列表
    function getTokens() {
            return $this->tokens;
    }
    
        // 返回指定用户的余额
    function getBalance($user) {
            return $this->balances[$user];
    }
        // 处理用户的充值操作
    function deposit($user, $token, $amount) {
            $this->balances[$user][$token] += $amount;
                    echo "$user deposited $amount $token.\n";
    }
    
        // 处理用户的提现操作
    function withdraw($user, $token, $amount) {
            if ($this->balances[$user][$token] >= $amount) {
                $this->balances[$user][$token] -= $amount;
                            echo "$user withdrew $amount $token.\n";
        } else {
                    echo "$user does not have enough $token.\n";
        }
    }    // 处理用户的交易操作
    function trade($user, $fromToken, $toToken, $amount) {
            if ($this->balances[$user][$fromToken] >= $amount) {
                        $this->balances[$user][$fromToken] -= $amount;
                                    $this->balances[$user][$toToken] += $amount;
                                                echo "$user traded $amount $fromToken for $amount $toToken.\n";
                                                
        } else {
                    echo "$user does not have enough $fromToken.\n";
        }
    }
}
// 测试代码$exchange = new BOWExchange();
// 输出交易对列表$tokens = $exchange->getTokens();
echo "Available tokens:\n";foreach ($tokens as $token) {
    echo "$token[0]/$token[1]\n";
}
// 输出用户余额$user1 = 'user1';
$user2 = 'user2';echo "\n$user1 balance:
\n";print_r($exchange->getBalance($user1));
echo "\n$user2 balance:\n";print_r($exchange->getBalance($user2));