Allow disabling Electrum RPC while continuing indexing

internal/config_specification.toml

@@ -96,6 +96,10 @@ default = "10"
 name = "ignore_mempool"
 doc = "Don't sync mempool - queries will show only confirmed transactions."
 
+[[switch]]
+name = "disable_electrum_rpc"
+doc = "Disable Electrum RPC server - only sync and index blocks."
+
 [[switch]]
 name = "sync_once"
 doc = "Exit after the initial sync is over (don't start Electrum server)."

src/config.rs

@@ -136,6 +136,7 @@ pub struct Config {
     pub auto_reindex: bool,
     pub ignore_mempool: bool,
     pub sync_once: bool,
+    pub disable_electrum_rpc: bool,
     pub server_banner: String,
     pub args: Vec<String>,
 }
@@ -308,6 +309,7 @@ impl Config {
             auto_reindex: config.auto_reindex,
             ignore_mempool: config.ignore_mempool,
             sync_once: config.sync_once,
+            disable_electrum_rpc: config.disable_electrum_rpc,
             server_banner: config.server_banner,
             args: args.map(|a| a.into_string().unwrap()).collect(),
         };

src/server.rs

@@ -67,13 +67,14 @@ fn serve() -> Result<()> {
         return Ok(());
     }
 
-    let listener = TcpListener::bind(config.electrum_rpc_addr)?;
-    info!("serving Electrum RPC on {}", listener.local_addr()?);
-    let new_block_rx = rpc.new_block_notification();
-
     let (server_tx, server_rx) = unbounded();
-    spawn("accept_loop", || accept_loop(listener, server_tx)); // detach accepting thread
+    if !config.disable_electrum_rpc {
+        let listener = TcpListener::bind(config.electrum_rpc_addr)?;
+        info!("serving Electrum RPC on {}", listener.local_addr()?);
+        spawn("accept_loop", || accept_loop(listener, server_tx)); // detach accepting thread
+    };
 
+    let new_block_rx = rpc.new_block_notification();
     let mut peers = HashMap::<usize, Peer>::new();
     loop {
         select! {