Starting to write config file

side-node/src/init/keys.rs

@@ -0,0 +1,21 @@
+use std::{fs::File, io::Write, path::PathBuf};
+
+use bft_json_crdt::keypair::{make_keypair, KeyPair};
+use pem::Pem;
+
+/// Makes an Ed25519 keypair and returns the public and private keys as a PEM-encoded string.
+pub(crate) fn setup() -> String {
+    let keys = make_keypair();
+
+    let public_pem = Pem::new("PUBLIC", keys.public().to_string());
+    let private_pem = Pem::new("PRIVATE", keys.private().to_string());
+    pem::encode_many(&[public_pem, private_pem])
+}
+
+/// Writes a PEM-encoded string to a file at key_path.
+pub(crate) fn write_pem(key_path: PathBuf, pem: String) -> Result<(), std::io::Error> {
+    println!("Writing key to: {:?}", key_path);
+    let mut file = File::create(key_path)?;
+    file.write(pem.to_string().as_bytes())?;
+    Ok(())
+}