Remove rendezvous point default

This also fixes a bug where an empty string wasn't actually allowed
as a rendezvous point in the ASB's initial setup wizard.

swap/src/asb/config.rs

@@ -1,6 +1,5 @@
 use crate::env::{Mainnet, Testnet};
 use crate::fs::{ensure_directory_exists, system_config_dir, system_data_dir};
-use crate::network::rendezvous::DEFAULT_RENDEZVOUS_ADDRESS;
 use crate::tor::{DEFAULT_CONTROL_PORT, DEFAULT_SOCKS5_PORT};
 use anyhow::{bail, Context, Result};
 use config::ConfigError;
@@ -249,7 +248,7 @@ pub fn query_user_for_initial_config(testnet: bool) -> Result<Config> {
         .map(|str| str.parse())
         .collect::<Result<Vec<Multiaddr>, _>>()?;
 
-    let electrum_rpc_url: Url = Input::with_theme(&ColorfulTheme::default())
+    let electrum_rpc_url = Input::with_theme(&ColorfulTheme::default())
         .with_prompt("Enter Electrum RPC URL or hit return to use default")
         .default(defaults.electrum_rpc_url)
         .interact_text()?;
@@ -290,24 +289,22 @@ pub fn query_user_for_initial_config(testnet: bool) -> Result<Config> {
     }
     let ask_spread = Decimal::from_f64(ask_spread).context("Unable to parse spread")?;
 
-    let rendezvous_address = Input::with_theme(&ColorfulTheme::default())
+    let rendezvous_point = Input::<Multiaddr>::with_theme(&ColorfulTheme::default())
         .with_prompt("Do you want to advertise your ASB instance with a rendezvous node? Enter an empty string if not.")
-        .default(DEFAULT_RENDEZVOUS_ADDRESS.to_string())
+        .allow_empty(true)
         .interact_text()?;
 
-    let rendezvous_point = if rendezvous_address.is_empty() {
-        None
-    } else {
-        Some(Multiaddr::from_str(&rendezvous_address)?)
-    };
-
     println!();
 
     Ok(Config {
         data: Data { dir: data_dir },
         network: Network {
             listen: listen_addresses,
-            rendezvous_point,
+            rendezvous_point: if rendezvous_point.is_empty() {
+                None
+            } else {
+                Some(rendezvous_point)
+            },
             external_addresses: vec![],
         },
         bitcoin: Bitcoin {
@@ -358,7 +355,7 @@ mod tests {
             },
             network: Network {
                 listen: vec![defaults.listen_address_tcp, defaults.listen_address_ws],
-                rendezvous_point: Some(DEFAULT_RENDEZVOUS_ADDRESS.parse().unwrap()),
+                rendezvous_point: None,
                 external_addresses: vec![],
             },
 
@@ -401,7 +398,7 @@ mod tests {
             },
             network: Network {
                 listen: vec![defaults.listen_address_tcp, defaults.listen_address_ws],
-                rendezvous_point: Some(DEFAULT_RENDEZVOUS_ADDRESS.parse().unwrap()),
+                rendezvous_point: None,
                 external_addresses: vec![],
             },
 

swap/src/cli/command.rs

@@ -1,6 +1,6 @@
 use crate::env::GetConfig;
 use crate::fs::system_data_dir;
-use crate::network::rendezvous::{XmrBtcNamespace, DEFAULT_RENDEZVOUS_ADDRESS};
+use crate::network::rendezvous::XmrBtcNamespace;
 use crate::{env, monero};
 use anyhow::{Context, Result};
 use bitcoin::AddressType;
@@ -336,8 +336,7 @@ enum RawCommand {
     ListSellers {
         #[structopt(
             long,
-            help = "Address of the rendezvous point you want to use to discover ASBs",
-            default_value = DEFAULT_RENDEZVOUS_ADDRESS
+            help = "Address of the rendezvous point you want to use to discover ASBs"
         )]
         rendezvous_point: Multiaddr,
 

swap/src/network/rendezvous.rs

@@ -1,9 +1,6 @@
 use libp2p::rendezvous::Namespace;
 use std::fmt;
 
-pub const DEFAULT_RENDEZVOUS_ADDRESS: &str =
-    "/dnsaddr/rendezvous.coblox.tech/p2p/12D3KooWQUt9DkNZxEn2R5ymJzWj15MpG6mTW84kyd8vDaRZi46o";
-
 #[derive(Debug, PartialEq, Clone, Copy)]
 pub enum XmrBtcNamespace {
     Mainnet,