keypair logging adjustments

Signed-off-by: strawberry <strawberry@puppygock.gay>

src/utils/mod.rs

@@ -11,6 +11,7 @@ use argon2::{password_hash::SaltString, PasswordHasher};
 use rand::prelude::*;
 use ring::digest;
 use ruma::{canonical_json::try_from_json_map, CanonicalJsonError, CanonicalJsonObject, OwnedUserId};
+use tracing::debug;
 
 use crate::{services, Error, Result};
 
@@ -30,8 +31,11 @@ pub(crate) fn increment(old: Option<&[u8]>) -> Option<Vec<u8>> {
 	Some(number.to_be_bytes().to_vec())
 }
 
+/// Generates a new homeserver signing key. First 8 bytes are the version (a
+/// random alphanumeric string), the rest are generated by Ed25519KeyPair
 pub fn generate_keypair() -> Vec<u8> {
 	let mut value = random_string(8).as_bytes().to_vec();
+	debug!("Keypair version bytes: {value:?}");
 	value.push(0xFF);
 	value.extend_from_slice(
 		&ruma::signatures::Ed25519KeyPair::generate().expect("Ed25519KeyPair generation always works (?)"),
@@ -58,6 +62,7 @@ pub fn user_id_from_bytes(bytes: &[u8]) -> Result<OwnedUserId> {
 	.map_err(|_| Error::bad_database("Failed to parse user id from bytes"))
 }
 
+/// Generats a random *alphanumeric* string
 pub fn random_string(length: usize) -> String {
 	thread_rng().sample_iter(&rand::distributions::Alphanumeric).take(length).map(char::from).collect()
 }