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+/* This file is part of DarkFi (https://dark.fi)
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+ *
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+ * Copyright (C) 2020-2023 Dyne.org foundation
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+ *
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+ * This program is free software: you can redistribute it and/or modify
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+ * it under the terms of the GNU Affero General Public License as
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+ * published by the Free Software Foundation, either version 3 of the
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+ * License, or (at your option) any later version.
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+ *
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+ * This program is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ * GNU Affero General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Affero General Public License
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+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
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+ */
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+
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+use std::{collections::HashSet, sync::Arc};
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+
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+use darkfi::{
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+ async_daemonize, cli_desc,
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+ rpc::server::{listen_and_serve, RequestHandler},
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+ system::{StoppableTask, StoppableTaskPtr},
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+ util::path::expand_path,
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+ Error, Result,
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+};
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+use log::{error, info};
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+use serde::Deserialize;
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+use smol::{fs, lock::Mutex, stream::StreamExt, Executor};
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+use structopt::StructOpt;
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+use structopt_toml::StructOptToml;
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+use url::Url;
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+
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+const CONFIG_FILE: &str = "swapd.toml";
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+const CONFIG_FILE_CONTENTS: &str = include_str!("../swapd.toml");
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+
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+/// JSON-RPC server methods
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+mod rpc;
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+
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+#[derive(Clone, Debug, Deserialize, StructOpt, StructOptToml)]
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+#[serde(default)]
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+#[structopt(name = "darkfi-mmproxy", about = cli_desc!())]
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+struct Args {
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+ #[structopt(short, parse(from_occurrences))]
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+ /// Increase verbosity (-vvv supported)
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+ verbose: u8,
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+
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+ #[structopt(short, long)]
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+ /// Configuration file to use
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+ config: Option<String>,
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+
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+ #[structopt(long)]
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+ /// Set log file output
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+ log: Option<String>,
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+
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+ #[structopt(flatten)]
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+ swapd: SwapdArgs,
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+}
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+
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+#[derive(Clone, Debug, Deserialize, StructOpt, StructOptToml)]
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+#[structopt()]
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+struct SwapdArgs {
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+ #[structopt(long, default_value = "tcp://127.0.0.1:52821")]
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+ /// darkfi-swapd JSON-RPC listen URL
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+ swapd_rpc: Url,
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+
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+ #[structopt(long, default_value = "~/.local/darkfi/swapd")]
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+ /// Path to swapd's filesystem database
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+ swapd_db: String,
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+}
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+
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+/// Swapd daemon state
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+struct Swapd {
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+ /// Main reference to the swapd filesystem databaase
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+ _sled_db: sled::Db,
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+ /// JSON-RPC connection tracker
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+ rpc_connections: Mutex<HashSet<StoppableTaskPtr>>,
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+}
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+
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+impl Swapd {
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+ /// Instantiate `Swapd` state
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+ async fn new(_swapd_args: &SwapdArgs, sled_db: sled::Db) -> Result<Self> {
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+ Ok(Self { _sled_db: sled_db, rpc_connections: Mutex::new(HashSet::new()) })
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+ }
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+}
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+
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+async_daemonize!(realmain);
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+async fn realmain(args: Args, ex: Arc<Executor<'static>>) -> Result<()> {
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+ info!("Starting DarkFi Atomic Swap Daemon...");
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+
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+ // Create datastore path if not there already.
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+ let datastore = expand_path(&args.swapd.swapd_db)?;
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+ fs::create_dir_all(&datastore).await?;
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+ let sled_db = sled::open(datastore)?;
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+
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+ info!("Initializing daemon state");
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+ let swapd = Arc::new(Swapd::new(&args.swapd, sled_db.clone()).await?);
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+
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+ info!("Starting JSON-RPC server on {}", args.swapd.swapd_rpc);
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+ let swapd_ = Arc::clone(&swapd);
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+ let rpc_task = StoppableTask::new();
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+ rpc_task.clone().start(
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+ listen_and_serve(args.swapd.swapd_rpc, swapd.clone(), None, ex.clone()),
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+ |res| async move {
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+ match res {
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+ Ok(()) | Err(Error::RpcServerStopped) => swapd_.stop_connections().await,
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+ Err(e) => error!("Failed stopping JSON-RPC server: {}", e),
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+ }
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+ },
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+ Error::RpcServerStopped,
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+ ex.clone(),
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+ );
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+
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+ info!("Ready to operate");
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+
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+ // Signal handling for graceful termination.
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+ let (signals_handler, signals_task) = SignalHandler::new(ex)?;
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+ signals_handler.wait_termination(signals_task).await?;
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+ info!("Caught termination signal, cleaning up and exiting");
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+
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+ info!("Flushing sled database");
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+ sled_db.flush_async().await?;
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+
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+ info!("Shut down successfully");
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+ Ok(())
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+}
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parazyd