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use std::future::Future; use crate::msg::*; use crypto_markets::MarketType; mod crawlers; mod msg; pub async fn crawl<Fut>( exchange: &str, market_type: MarketType, channel_types: &[ChannelType], pairs: &[&str], msg_callback: impl Fn(Msg) -> Fut, ) -> () where Fut: Future<Output = ()>, { return; } #[cfg(test)] mod tests { #[test] fn it_works() { assert_eq!(2 + 2, 4); } }