[fortuna] accept only a secret file as argument

fortuna/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fortuna"
-version = "3.0.2"
+version = "3.1.0"
 edition = "2021"
 
 [dependencies]

fortuna/src/command/register_provider.rs

@@ -31,10 +31,7 @@ pub async fn register_provider(opts: &RegisterProviderOptions) -> Result<()> {
 
  // Create a new random hash chain.
  let random = rand::random::<[u8; 32]>();
- let secret = match opts.randomness.load_secret() {
- Ok(loaded_secret) => loaded_secret,
- Err(_err) => opts.randomness.secret_file.clone(),
- };
+ let secret = opts.randomness.load_secret()?;
 
  let commitment_length = opts.randomness.chain_length;
  let mut chain =

fortuna/src/command/run.rs

@@ -47,11 +47,7 @@ pub async fn run(opts: &RunOptions) -> Result<()> {
  struct ApiDoc;
 
  let config = Config::load(&opts.config.config)?;
- let secret: String;
- match opts.randomness.load_secret() {
- Ok(loaded_secret) => secret = loaded_secret,
- Err(_err) => secret = opts.randomness.secret_file.clone(),
- }
+ let secret = opts.randomness.load_secret()?;
 
 
  let mut chains = HashMap::new();

fortuna/src/config.rs

@@ -78,7 +78,6 @@ pub struct ConfigOptions {
 pub struct RandomnessOptions {
  /// Path to file containing a secret which is a 64-char hex string.
  /// The secret is used for generating new hash chains
- /// Or the secret itself. TODO: this will be removed in another PR.
  #[arg(long = "secret")]
  #[arg(env = "FORTUNA_SECRET")]
  pub secret_file: String,