🔒 加密支付

# 私钥安全管理示例
# 1. 分片存储
encrypted_key_part1 = encrypt(private_key[:32], master_password)
encrypted_key_part2 = encrypt(private_key[32:], backup_password)

# 2. 硬件安全模块(HSM)
with HSMConnection() as hsm:
    signature = hsm.sign(transaction_data, key_id)

# 3. 多重签名
def multi_sig_verify(signatures, pubkeys, message):
    valid_sigs = 0
    for sig, pubkey in zip(signatures, pubkeys):
        if verify_signature(sig, pubkey, message):
            valid_sigs += 1
    return valid_sigs >= M_OF_N_THRESHOLD
                    

# 交易确认处理
def wait_for_confirmation(tx_hash, blockchain, min_confirmations):
    confirmations = 0
    while confirmations < min_confirmations:
        time.sleep(blockchain.average_block_time)
        confirmations = get_confirmations(tx_hash)
        update_order_status(tx_hash, f"Confirmed: {confirmations}/{min_confirmations}")
    
    return mark_as_paid(tx_hash)

# 风险评估
def risk_assessment(amount, blockchain, urgency):
    if urgency == "high":
        return MIN_CONFIRMATIONS.get(blockchain, 6) * 0.5  # 降低确认数，增加风险
    elif amount > HIGH_VALUE_THRESHOLD:
        return MIN_CONFIRMATIONS.get(blockchain, 6) * 2   # 增加确认数
    else:
        return MIN_CONFIRMATIONS.get(blockchain, 6)
                    

# 价格风险管理示例
class PriceRiskManager:
    def __init__(self, volatility_threshold=0.05):  # 5% 波动阈值
        self.volatility_threshold = volatility_threshold
    
    def get_stable_price(self, crypto_amount, crypto_symbol):
        # 获取多个交易所的平均价格
        prices = get_multi_exchange_prices(crypto_symbol)
        avg_price = calculate_weighted_average(prices)
        
        # 检查价格波动
        volatility = calculate_volatility(prices)
        if volatility > self.volatility_threshold:
            log_high_volatility_warning(crypto_symbol, volatility)
        
        return crypto_amount / avg_price  # 转换为法币金额

    def lock_exchange_rate(self, order_id, duration_minutes=15):
        # 锁定汇率15分钟
        rate = get_current_rate()
        cache_set(f"rate_lock:{order_id}", rate, duration_minutes * 60)
        return rate