Add subcommand to print config

This subcommand has been introduced to make it easy for users to find
the location of the deprecated sled database in case they wish to delete
it. This feature should also resolve difficulties users were facing when
 trying to find where xmr-btc-swap was storing their data.

swap/src/asb/command.rs

@@ -65,6 +65,15 @@ where
             env_config: env_config(testnet),
             cmd: Command::Balance,
         },
+        RawCommand::Config => Arguments {
+            testnet,
+            json,
+            sled,
+            disable_timestamp,
+            config_path: config_path(config, testnet)?,
+            env_config: env_config(testnet),
+            cmd: Command::Config,
+        },
         RawCommand::ManualRecovery(ManualRecovery::Redeem {
             redeem_params: RecoverCommandParams { swap_id },
             do_not_await_finality,
@@ -191,6 +200,7 @@ pub enum Command {
         resume_only: bool,
     },
     History,
+    Config,
     WithdrawBtc {
         amount: Option<Amount>,
         address: Address,
@@ -270,6 +280,8 @@ pub enum RawCommand {
     },
     #[structopt(about = "Prints swap-id and the state of each swap ever made.")]
     History,
+    #[structopt(about = "Prints the current config")]
+    Config,
     #[structopt(about = "Allows withdrawing BTC from the internal Bitcoin wallet.")]
     WithdrawBtc {
         #[structopt(

swap/src/bin/asb.rs

@@ -217,6 +217,10 @@ async fn main() -> Result<()> {
 
             println!("{}", table);
         }
+        Command::Config => {
+            let config_json = serde_json::to_string_pretty(&config)?;
+            println!("{}", config_json);
+        }
         Command::WithdrawBtc { amount, address } => {
             let bitcoin_wallet = init_bitcoin_wallet(&config, &seed, env_config).await?;
 

swap/src/bin/swap.rs

@@ -152,7 +152,37 @@ async fn main() -> Result<()> {
 
             println!("{}", table);
         }
-
+        Command::Config => {
+            println!("Data directory: {}", data_dir.display());
+            println!(
+                "Log files locations: {}",
+                format!("{}/wallet", data_dir.display())
+            );
+            println!(
+                "Sled folder location: {}",
+                format!("{}/database", data_dir.display())
+            );
+            println!(
+                "Sqlite file location: {}",
+                format!("{}/sqlite", data_dir.display())
+            );
+            println!(
+                "Seed file location: {}",
+                format!("{}/seed.pem", data_dir.display())
+            );
+            println!(
+                "Monero-wallet-rpc location: {}",
+                format!("{}/monero", data_dir.display())
+            );
+            println!(
+                "Internal bitcoin wallet location: {}",
+                format!("{}/wallet", data_dir.display())
+            );
+            println!(
+                "Internal bitcoin wallet location: {}",
+                format!("{}/wallet", data_dir.display())
+            );
+        }
         Command::WithdrawBtc {
             bitcoin_electrum_rpc_url,
             bitcoin_target_block,

swap/src/cli/command.rs

@@ -113,6 +113,14 @@ where
             data_dir: data::data_dir_from(data, is_testnet)?,
             cmd: Command::History,
         },
+        RawCommand::Config => Arguments {
+            env_config: env_config_from(is_testnet),
+            debug,
+            json,
+            sled,
+            data_dir: data::data_dir_from(data, is_testnet)?,
+            cmd: Command::Config,
+        },
         RawCommand::Balance { bitcoin } => {
             let (bitcoin_electrum_rpc_url, bitcoin_target_block) =
                 bitcoin.apply_defaults(is_testnet)?;
@@ -248,6 +256,7 @@ pub enum Command {
         tor_socks5_port: u16,
     },
     History,
+    Config,
     WithdrawBtc {
         bitcoin_electrum_rpc_url: Url,
         bitcoin_target_block: usize,
@@ -355,6 +364,8 @@ enum RawCommand {
     },
     /// Show a list of past, ongoing and completed swaps
     History,
+    #[structopt(about = "Prints the current config")]
+    Config,
     #[structopt(about = "Allows withdrawing BTC from the internal Bitcoin wallet.")]
     WithdrawBtc {
         #[structopt(flatten)]

swap/src/env.rs

@@ -1,10 +1,11 @@
 use crate::asb;
 use crate::bitcoin::{CancelTimelock, PunishTimelock};
+use serde::Serialize;
 use std::cmp::max;
 use std::time::Duration;
 use time::ext::NumericalStdDuration;
 
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Serialize)]
 pub struct Config {
     pub bitcoin_lock_mempool_timeout: Duration,
     pub bitcoin_lock_confirmed_timeout: Duration,
@@ -15,6 +16,7 @@ pub struct Config {
     pub bitcoin_network: bitcoin::Network,
     pub monero_avg_block_time: Duration,
     pub monero_finality_confirmations: u64,
+    #[serde(with = "monero_network")]
     pub monero_network: monero::Network,
 }
 
@@ -123,6 +125,23 @@ pub fn new(is_testnet: bool, asb_config: &asb::config::Config) -> Config {
     }
 }
 
+mod monero_network {
+    use crate::monero::Network;
+    use serde::Serializer;
+
+    pub fn serialize<S>(x: &monero::Network, s: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let str = match x {
+            Network::Mainnet => "mainnet",
+            Network::Stagenet => "stagenet",
+            Network::Testnet => "testnet",
+        };
+        s.serialize_str(&str)
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;