Add a miniscript compiler CLI

examples/compiler.rs

@@ -0,0 +1,110 @@
+extern crate bitcoin;
+extern crate clap;
+extern crate log;
+extern crate magical_bitcoin_wallet;
+extern crate miniscript;
+extern crate rand;
+extern crate serde_json;
+extern crate sled;
+
+use std::str::FromStr;
+
+use log::info;
+
+use rand::distributions::Alphanumeric;
+use rand::{thread_rng, Rng};
+
+use clap::{App, Arg};
+
+use bitcoin::Network;
+use miniscript::policy::Concrete;
+use miniscript::Descriptor;
+
+use magical_bitcoin_wallet::types::ScriptType;
+use magical_bitcoin_wallet::{OfflineWallet, Wallet};
+
+fn main() {
+    env_logger::init_from_env(
+        env_logger::Env::default().filter_or(env_logger::DEFAULT_FILTER_ENV, "info"),
+    );
+
+    let matches = App::new("Miniscript Compiler")
+        .arg(
+            Arg::with_name("POLICY")
+                .help("Sets the spending policy to compile")
+                .required(true)
+                .index(1),
+        )
+        .arg(
+            Arg::with_name("TYPE")
+                .help("Sets the script type used to embed the compiled policy")
+                .required(true)
+                .index(2)
+                .possible_values(&["sh", "wsh", "sh-wsh"]),
+        )
+        .arg(
+            Arg::with_name("parsed_policy")
+                .long("parsed_policy")
+                .short("p")
+                .help("Also return the parsed spending policy in JSON format"),
+        )
+        .arg(
+            Arg::with_name("network")
+                .short("n")
+                .long("network")
+                .help("Sets the network")
+                .takes_value(true)
+                .default_value("testnet")
+                .possible_values(&["testnet", "regtest"]),
+        )
+        .get_matches();
+
+    let policy_str = matches.value_of("POLICY").unwrap();
+    info!("Compiling policy: {}", policy_str);
+
+    let policy = Concrete::<String>::from_str(&policy_str).unwrap();
+    let compiled = policy.compile().unwrap();
+
+    let descriptor = match matches.value_of("TYPE").unwrap() {
+        "sh" => Descriptor::Sh(compiled),
+        "wsh" => Descriptor::Wsh(compiled),
+        "sh-wsh" => Descriptor::ShWsh(compiled),
+        _ => panic!("Invalid type"),
+    };
+
+    info!("... Descriptor: {}", descriptor);
+
+    let temp_db = {
+        let mut temp_db = std::env::temp_dir();
+        let rand_string: String = thread_rng().sample_iter(&Alphanumeric).take(15).collect();
+        temp_db.push(rand_string);
+
+        let database = sled::open(&temp_db).unwrap();
+
+        let network = match matches.value_of("network") {
+            Some("regtest") => Network::Regtest,
+            Some("testnet") | _ => Network::Testnet,
+        };
+        let wallet: OfflineWallet<_> = Wallet::new_offline(
+            &format!("{}", descriptor),
+            None,
+            network,
+            database.open_tree("").unwrap(),
+        )
+        .unwrap();
+
+        info!("... First address: {}", wallet.get_new_address().unwrap());
+
+        if matches.is_present("parsed_policy") {
+            let spending_policy = wallet.policies(ScriptType::External).unwrap();
+            info!(
+                "... Spending policy:\n{}",
+                serde_json::to_string_pretty(&spending_policy).unwrap()
+            );
+        }
+
+        temp_db
+    };
+
+    std::fs::remove_dir_all(temp_db).unwrap();
+}