src/settings.rs (5)

31-36: Consider using an enum for the privacy level.

The level field is defined as a string, which allows any arbitrary value. Using an enum would provide type safety and restrict inputs to valid privacy levels.

+ use serde::Deserialize;
+ 
+ #[derive(Debug, Deserialize, PartialEq)]
+ #[serde(rename_all = "lowercase")]
+ pub enum PrivacyLevel {
+     Low,
+     Medium,
+     High,
+     Maximum,
+ }

#[derive(Debug, Deserialize)]
#[allow(unused)]
pub struct PrivacyConfig {
-   pub level: String,
+   pub level: PrivacyLevel,
    pub allow_custom_fields: bool,
}

---

74-77: Consider making the configuration file path configurable.

The configuration file path is currently hardcoded as "config/mesh". Consider making this configurable through an environment variable to support different deployment scenarios.

impl Settings {
    pub(crate) fn new() -> Result<Settings, config::ConfigError> {
+       // Allow overriding the config file path with environment variable
+       let config_path = std::env::var("DTIM_CONFIG_PATH").unwrap_or_else(|_| "config/mesh".to_string());
+
        let config = config::Config::builder()
-           .add_source(config::File::with_name("config/mesh"))
+           .add_source(config::File::with_name(&config_path))
            .add_source(config::Environment::with_prefix("DTIM"))
            .build()?;

---

7-7: Remove #[allow(unused)] attributes when fields are actually used.

The #[allow(unused)] attributes are used throughout the file. While they might be useful during development, they should be removed for fields that are actually used in the code. Otherwise, they might mask potential issues if some fields become genuinely unused.

Also applies to: 16-16, 23-23, 32-32, 39-39, 54-54, 67-67

---

55-64: Consider adding validation for configuration values.

The settings struct doesn't validate that the loaded configuration values are within acceptable ranges or formats. Consider implementing a validation method to check values like port ranges, valid IP addresses, etc.

impl Settings {
    // Add a validate method to check configuration values
    pub fn validate(&self) -> Result<(), String> {
        // Validate port is in reasonable range
        if self.port == 0 || self.port > 65535 {
            return Err(format!("Invalid port: {}", self.port));
        }
        
        // Validate log level is one of the accepted values
        match self.log_level.to_lowercase().as_str() {
            "debug" | "info" | "warn" | "error" => {}
            _ => return Err(format!("Invalid log level: {}", self.log_level)),
        }
        
        // Add more validation for other fields
        
        Ok(())
    }
}

Then update the new method to call validation:

pub(crate) fn new() -> Result<Settings, config::ConfigError> {
    // ... existing code ...
    
    let settings = root.default;
+   if let Err(e) = settings.validate() {
+       return Err(config::ConfigError::Message(e));
+   }
    Ok(settings)
}

---

1-84: Consider adding unit tests for configuration loading.

Since the configuration is critical for the application, it would be beneficial to add unit tests to ensure it loads correctly from files and environment variables.

You could add tests that:

1. Verify loading from a test configuration file
2. Check that environment variables override file settings
3. Ensure errors are properly handled for invalid configurations
4. Validate the validation logic works correctly

This would help ensure the configuration system remains robust as the application evolves.

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src/node.rs (1)

163-166: Consider implementing Eq alongside PartialEq.

The PartialEq implementation correctly identifies peers by their ID only, which is appropriate for identity comparison. However, when implementing PartialEq, it's a best practice to also implement Eq for types where equality is reflexive, symmetric, and transitive.

impl PartialEq for NodePeer {
    fn eq(&self, other: &Self) -> bool {
        self.id == other.id
    }
}
+
+impl Eq for NodePeer {}

src/main.rs (1)

97-97: Consider making the endpoint configurable.

The endpoint is hardcoded as "127.0.0.1:3030", which might limit flexibility in different deployment scenarios.

let mut data = NodePeer {
    id: id.to_string(),
-   endpoint: "127.0.0.1:3030".to_string(),
+   endpoint: format!("{}:{}", settings.network.host.unwrap_or_else(|| "127.0.0.1".to_string()), settings.network.port.unwrap_or(3030)),
    public_key: base64_pubkey,
    signature: None,
};

This assumes that the settings structure has network.host and network.port fields, which may need to be adjusted based on the actual settings structure.

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