PHP SDK

<?php

class HDWaaSClient {
    private string $apiKey;
    private string $secretKey;
    private string $baseUrl;

    public function __construct(string $apiKey, string $secretKey, string $baseUrl = 'https://api.2settle.io') {
        $this->apiKey = $apiKey;
        $this->secretKey = $secretKey;
        $this->baseUrl = $baseUrl;
    }

    private function sign(string $method, string $path, array $body = []): array {
        $timestamp = (string) round(microtime(true) * 1000);
        $bodyStr = json_encode($body ?: new stdClass(), JSON_UNESCAPED_SLASHES);
        $bodyHash = hash('sha256', $bodyStr);
        $payload = "{$timestamp}|{$method}|{$path}|{$bodyHash}";
        $hmacKey = hash('sha256', $this->secretKey);
        $signature = hash_hmac('sha256', $payload, $hmacKey);
        return [$timestamp, $signature, $bodyStr];
    }

    private function request(string $method, string $path, array $body = null): array {
        [$timestamp, $signature, $bodyStr] = $this->sign($method, $path, $body ?? []);

        $ch = curl_init();
        curl_setopt_array($ch, [
            CURLOPT_URL => $this->baseUrl . $path,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_CUSTOMREQUEST => $method,
            CURLOPT_HTTPHEADER => [
                'Content-Type: application/json',
                'X-API-Key: ' . $this->apiKey,
                'X-Timestamp: ' . $timestamp,
                'X-Signature: ' . $signature,
            ],
        ]);

        if ($method !== 'GET' && $body !== null) {
            curl_setopt($ch, CURLOPT_POSTFIELDS, $bodyStr);
        }

        $response = curl_exec($ch);
        curl_close($ch);

        return json_decode($response, true);
    }

    public function createWallet(string $network, string $crypto, array $metadata = null, int $expiresInMinutes = null): array {
        $body = ['network' => $network, 'crypto' => $crypto];
        if ($metadata) $body['metadata'] = $metadata;
        if ($expiresInMinutes) $body['expiresInMinutes'] = $expiresInMinutes;
        return $this->request('POST', '/v1/wallets', $body);
    }

    public function getWallet(string $walletId): array {
        return $this->request('GET', "/v1/wallets/{$walletId}", []);
    }

    public function listWallets(string $status = null, int $limit = 50, int $offset = 0): array {
        $query = http_build_query(array_filter([
            'status' => $status,
            'limit' => $limit,
            'offset' => $offset,
        ]));
        return $this->request('GET', "/v1/wallets?{$query}", []);
    }
}

// Usage
$client = new HDWaaSClient('pk_your_api_key', 'sk_your_secret_key');

// Create USDT deposit address
$result = $client->createWallet('trc20', 'USDT', ['orderId' => 'ORD-12345'], 60);
echo "Deposit address: " . $result['wallet']['address'] . "\n";

// Check deposit status
$status = $client->getWallet($result['wallet']['id']);
echo "Status: " . $status['wallet']['status'] . "\n";