Simplified bitcoin keys module name

side-node/src/bitcoin/keys.rs

@@ -0,0 +1,50 @@
+use bdk::{
+    keys::{
+        bip39::{Language, Mnemonic, WordCount},
+        DerivableKey, ExtendedKey, GeneratableKey, GeneratedKey,
+    },
+    miniscript,
+};
+
+use std::{
+    fs::{self, File},
+    io::Write,
+    path::PathBuf,
+};
+
+pub fn make_mnemonic() -> String {
+    let mnemonic: GeneratedKey<_, miniscript::Segwitv0> =
+        Mnemonic::generate((WordCount::Words12, Language::English)).unwrap();
+    mnemonic.to_string()
+}
+
+/// Write the mnemonic to a file in the node's side directory
+///
+/// TODO: obviously spitting the mnemonic out to the console is not for production
+pub(crate) fn write(mnemonic_path: &PathBuf) -> Result<(), std::io::Error> {
+    let mnemonic = make_mnemonic();
+    let mut file = File::create(mnemonic_path)?;
+    println!("mnemonic: {mnemonic}");
+    file.write(mnemonic.as_bytes())?;
+
+    Ok(())
+}
+
+/// Creates Signet Bitcoin descriptors from a mnemonic
+pub fn get(mnemonic_words: String) -> anyhow::Result<ExtendedKey> {
+    let mnemonic = Mnemonic::parse(mnemonic_words).unwrap();
+
+    // Generate the extended key
+    let xkey: ExtendedKey = mnemonic
+        .into_extended_key()
+        .expect("couldn't turn mnemonic into xkey");
+
+    Ok(xkey)
+}
+
+pub(crate) fn load_from_file(side_dir: &PathBuf) -> anyhow::Result<ExtendedKey> {
+    let mnemonic_path = crate::utils::side_paths(side_dir.clone()).1; // TODO: this tuple stinks
+    let mnemonic_words = fs::read_to_string(mnemonic_path).expect("couldn't read bitcoin key file");
+    println!("Creating wallet from mnemonic: {mnemonic_words}");
+    get(mnemonic_words)
+}