Key generation, saving and loading works.

side-node/src/keys.rs

@@ -0,0 +1,27 @@
+use std::{
+    fs::{self, File},
+    io::Write,
+    path::PathBuf,
+};
+
+use bft_json_crdt::keypair::{make_keypair, Ed25519KeyPair};
+use fastcrypto::traits::EncodeDecodeBase64;
+
+/// Writes a new Ed25519 keypair to the file at key_path.
+pub(crate) fn write(key_path: PathBuf) -> Result<(), std::io::Error> {
+    let keys = make_keypair();
+
+    let mut file = File::create(key_path)?;
+    let out = keys.encode_base64();
+    file.write(out.as_bytes())?;
+    Ok(())
+}
+
+pub(crate) fn load_from_file(side_dir: PathBuf) -> Ed25519KeyPair {
+    let key_path = crate::utils::side_paths(side_dir.clone()).0;
+
+    let data = fs::read_to_string(key_path).expect("couldn't read key file");
+    println!("data: {:?}", data);
+
+    Ed25519KeyPair::decode_base64(&data).expect("couldn't load keypair from file")
+}