From 590834ca2463b275d2cd1fcc3a603a62f97cefd3 Mon Sep 17 00:00:00 2001
From: Philipp Hoenisch <philipp@hoenisch.at>
Date: Thu, 22 Oct 2020 11:44:13 +1100
Subject: [PATCH] A simple clie proposal

---
 README.md           | 24 +++++++++++++++++
 xmr-btc/Cargo.toml  |  2 ++
 xmr-btc/src/cli.rs  | 17 ++++++++++++
 xmr-btc/src/lib.rs  |  1 +
 xmr-btc/src/main.rs | 63 +++++++++++++++++++++++++++++++++++++++++++++
 5 files changed, 107 insertions(+)
 create mode 100644 xmr-btc/src/cli.rs
 create mode 100644 xmr-btc/src/main.rs

diff --git a/README.md b/README.md
index e9a2a1dc..ae57e301 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,30 @@
 XMR to BTC Atomic Swap
 ======================
 
+## How to start
+
+### As a maker
+
+To start the application as a maker type the following into your terminal:  
+```bash 
+xmr_btc --maker
+```
+The application will then print your listening address and waits for a taker to connect to you. 
+Once connected, it will perform the atomic swap automatically. 
+
+### As a taker
+
+To start the application as a taker type the following into your terminal:
+
+```bash
+xmr-btc --taker --address <maker_address>
+```
+
+You will connect to the maker as defined by `<maker_address>` and retrieve his latest rate. 
+If you are happy with this rate just hit `ENTER` and the application will perform the atomic swap for you. 
+
+-----
+
 This repository is a proof of concept for atomically swapping XMR for BTC.
 
 We define:
diff --git a/xmr-btc/Cargo.toml b/xmr-btc/Cargo.toml
index b8afd051..2dc57543 100644
--- a/xmr-btc/Cargo.toml
+++ b/xmr-btc/Cargo.toml
@@ -17,8 +17,10 @@ miniscript = "1"
 monero = "0.9"
 rand = "0.7"
 reqwest = { version = "0.10", default-features = false, features = ["socks"] }
+rustyline = "6.3"
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
+structopt = "0.3"
 sha2 = "0.9"
 thiserror = "1"
 tokio = { version = "0.2", default-features = false, features = ["blocking", "macros", "rt-core", "time", "rt-threaded"] }
diff --git a/xmr-btc/src/cli.rs b/xmr-btc/src/cli.rs
new file mode 100644
index 00000000..5fc10fcd
--- /dev/null
+++ b/xmr-btc/src/cli.rs
@@ -0,0 +1,17 @@
+use structopt::StructOpt;
+
+#[derive(Debug, StructOpt)]
+#[structopt(name = "xmr-btc", about = "A simple BTC/XMR atomic swap tool.")]
+pub struct Opt {
+    /// Run as the maker i.e., wait for a taker to connect and trade
+    #[structopt(short, long)]
+    pub maker: bool,
+
+    /// Request a rate from a maker
+    #[structopt(short, long)]
+    pub taker: bool,
+
+    /// Onion/Ipv4 mulitaddr of a maker
+    #[structopt(long)]
+    pub address: Option<String>,
+}
diff --git a/xmr-btc/src/lib.rs b/xmr-btc/src/lib.rs
index 9526bad4..93f920b2 100644
--- a/xmr-btc/src/lib.rs
+++ b/xmr-btc/src/lib.rs
@@ -48,6 +48,7 @@ mod utils {
 pub mod alice;
 pub mod bitcoin;
 pub mod bob;
+pub mod cli;
 pub mod monero;
 #[cfg(feature = "tor")]
 pub mod tor;
diff --git a/xmr-btc/src/main.rs b/xmr-btc/src/main.rs
new file mode 100644
index 00000000..38a17bf3
--- /dev/null
+++ b/xmr-btc/src/main.rs
@@ -0,0 +1,63 @@
+use anyhow::{bail, Result};
+use rustyline::{error::ReadlineError, Editor};
+use structopt::StructOpt;
+use xmr_btc::cli::Opt;
+
+fn run_app() -> Result<()> {
+    let opt = Opt::from_args();
+
+    if opt.maker {
+        run_maker()?
+    } else if opt.taker {
+        let addr = match opt.address {
+            Some(addr) => addr,
+            None => bail!("Maker address is required"),
+        };
+
+        run_taker(addr)?
+    } else {
+        bail!("Invalid argument")
+    }
+
+    Ok(())
+}
+
+fn main() {
+    std::process::exit(match run_app() {
+        Ok(_) => 0,
+        Err(err) => {
+            eprintln!("error: {:?}", err);
+            1
+        }
+    });
+}
+
+fn run_maker() -> Result<()> {
+    // wait for a taker to connect and auto trade
+    println!("Usually we would now wait for takers to connect");
+    Ok(())
+}
+
+fn run_taker(_addr: String) -> Result<()> {
+    let mut rl = Editor::<()>::new();
+
+    // connect to maker and get rate
+
+    let readline = rl.readline("Received order from maker: 1 BTC for 42 XMR. Take it or leave it? Hit <enter> to accept or CTRL-C to decline and quit.\n ");
+    match readline {
+        Ok(line) => {
+            rl.add_history_entry(line.as_str());
+            println!("Accepting trade doing the swap");
+            Ok(())
+        }
+        Err(ReadlineError::Interrupted) => {
+            println!("Trade canceled. Terminating application");
+            Ok(())
+        }
+        Err(ReadlineError::Eof) => {
+            println!("Trade canceled. Terminating application");
+            Ok(())
+        }
+        Err(err) => bail!("Error: {:?}", err),
+    }
+}