darwinia-shadow 0.2.5

The shadow service for relayers and verify workers to retrieve header data and generate proof.
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use crate::{api, mmr::Runner, result::Error, ShadowShared};

/// Run shadow service
pub async fn exec(port: u16, verbose: bool) -> Result<(), Error> {
    let shared = ShadowShared::new(None);
    let mut runner = Runner::from(shared.clone());

    if std::env::var("RUST_LOG").is_err() {
        if verbose {
            std::env::set_var("RUST_LOG", "info,darwinia_shadow");
        } else {
            std::env::set_var("RUST_LOG", "info");
        }
    }
    env_logger::init();
    let (mr, ar) = futures::join!(api::serve(port, shared), runner.start());
    mr?;
    ar?;
    Ok(())
}