如何在结账流程中将该卡设置为默认付款方式？

// 示例前端代码
async function setDefaultPaymentMethod(cardId) {
    try {
        const response = await fetch('/api/set-default-payment', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ cardId })
        });
        if (response.ok) {
            console.log('Default payment method updated successfully');
        } else {
            console.error('Failed to update default payment method');
        }
    } catch (error) {
        console.error('Error:', error);
    }
}

// 示例前端代码
async function setDefaultPaymentMethod(cardId) {
    const button = document.getElementById('set-default-button');
    button.disabled = true;
    try {
        const response = await fetch('/api/set-default-payment', {
            method: 'POST',
            headers: {
                'Content-Type': 'application/json'
            },
            body: JSON.stringify({ cardId })
        });
        if (response.ok) {
            console.log('Default payment method updated successfully');
        } else {
            console.error('Failed to update default payment method');
        }
    } catch (error) {
        console.error('Error:', error);
    } finally {
        button.disabled = false;
    }
}