allow creating all key files

1 files changed, 27 insertions, 1 deletions

diff --git a/src/transport/mycelium/mod.rs b/src/transport/mycelium/mod.rs
index 21c939d..9078134 100644
--- a/src/transport/mycelium/mod.rs
+++ b/src/transport/mycelium/mod.rs
@@ -104,6 +104,9 @@ pub(crate) fn check(settings: &crate::config::Settings) -> Result<()> {
             );
         }
     }
+    if settings.mycelium_key_create && settings.mycelium_key_file.is_none() {
+        anyhow::bail!("mycelium-key-create creates the key at mycelium-key-file; set that too");
+    }
     // A private network has both; one alone would be ignored or invented.
     if settings.mycelium_network_key_file.is_some() != settings.mycelium_network_name.is_some() {
         anyhow::bail!("mycelium-network-key-file and mycelium-network-name go together");
@@ -113,9 +116,10 @@ pub(crate) fn check(settings: &crate::config::Settings) -> Result<()> {
 
 /// The options only a supervised Mycelium daemon takes, and whether each is set: the
 /// other side of `config::CONFLICTS`' `mycelium-rest-url` (a test keeps them the same).
-pub(crate) fn supervised_only(settings: &crate::config::Settings) -> [(&'static str, bool); 4] {
+pub(crate) fn supervised_only(settings: &crate::config::Settings) -> [(&'static str, bool); 5] {
     [
         ("mycelium-key-file", settings.mycelium_key_file.is_some()),
+        ("mycelium-key-create", settings.mycelium_key_create),
         (
             "mycelium-network-key-file",
             settings.mycelium_network_key_file.is_some(),
@@ -138,6 +142,28 @@ pub(crate) async fn start(
     settings: &crate::config::Settings,
     mut stop: tokio::sync::watch::Receiver<bool>,
 ) -> Result<Option<MyceliumTransport>> {
+    // The daemon's key, 32 raw bytes (as `daemon` hands it an ephemeral one): read,
+    // or made, here, so a missing file fails before the daemon starts.
+    if let Some(path) = &settings.mycelium_key_file {
+        let (bytes, created) = crate::files::key_file(
+            path,
+            "Mycelium key",
+            settings.mycelium_key_create,
+            "mycelium-key-create",
+            "a new Mycelium address",
+            32,
+        )?;
+        if bytes.len() != 32 {
+            anyhow::bail!(
+                "The Mycelium key in {} has {} bytes; it has 32",
+                path.display(),
+                bytes.len()
+            );
+        }
+        if created {
+            tracing::info!(path = %path.display(), "Created a new Mycelium key");
+        }
+    }
     let spawn_config = MyceliumSpawnConfig {
         rest_url_opt: settings
             .mycelium_rest_url