Function crypto_crawler::subscribe_symbol

pub async fn subscribe_symbol(
    exchange: &str,
    market_type: MarketType,
    symbol: &str,
    msg_types: &[MessageType],
    tx: Sender<String>
)

Subscribe to multiple message types of one symbol.

This API is suitable for client applications such as APP, website, etc.

String messages in tx are already parsed by crypto-msg-parser.