Function main

plugins/currencyrate-plugin/src/main.rs:36–127

()

#[tokio::main(flavor = "current_thread")]
async fn main() -> Result<(), anyhow::Error> {
    unsafe {
        // SAFETY:
        // `std::env::set_var` is unsafe in Rust 2024 because environment variables
        // are process-global and unsynchronized. Concurrent reads/writes from
        // multiple threads can cause undefined behavior.
        //
        // This call happens at process startup, before any threads are spawned and
        // before any code that may read environment variables is executed.
        // Therefore, no concurrent access is possible.
        std::env::set_var(
            "CLN_PLUGIN_LOG",
            "cln_plugin=info,cln_rpc=info,cln_currencyrate=debug,warn",
        )
    };

    log_panics::init();

    let _ = rustls::crypto::ring::default_provider().install_default();

    let add_source_opt = StringArrayConfigOption::new_str_arr_no_default(
        "currencyrate-add-source",
        "A source for cln-currencyrate to fetch price data from in the format of `NAME,URL,MEMBERS`",
    );
    let disable_source_opt = StringArrayConfigOption::new_str_arr_no_default(
        "currencyrate-disable-source",
        "The name of the cln-currencyrate source to disable",
    );

    let Some(plugin) = Builder::new(tokio::io::stdin(), tokio::io::stdout())
        .option(add_source_opt)
        .option(disable_source_opt)
        .rpcmethod_from_builder(
            RpcMethodBuilder::new("currencyconvert", currencyconvert)
                .description(
                    "Converts the given amount and currency into msats, using the
median from currencyrates results",
                )
                .usage("amount currency"),
        )
        .rpcmethod_from_builder(
            RpcMethodBuilder::new("listcurrencyrates", listcurrencyrates)
                .description("Returns the BTC price for the currency from every source")
                .usage("currency"),
        )
        .rpcmethod_from_builder(
            RpcMethodBuilder::new("currencyrate", currencyrate)
                .description(
                    "Provides the conversion of one BTC into the given currency, using the median of the available exchange-rate sources",
                )
                .usage("currency"),
        )
        .dynamic()
        .configure()
        .await?
    else {
        return Ok(());
    };