koishi-plugin-adapter-iirose/src/decoder/messages/Balance.ts

[IIROSE-蔷薇花园](https://iirose.com/)适配器

// src/decoder/messages/Balance.ts

/**
 * 解析余额信息
 * @param message 消息
 * @returns {number | null}
 */
export const parseBalance = (message: string): number | null =>
{
    if (message.startsWith('`$'))
    {
        const balance = parseFloat(message.substring(2));
        if (!isNaN(balance))
        {
            return balance;
        }
    }
    return null;
};