protocol/limiter: impl AsTokens for limits

Provide `AsTokens` implementations for the `Outbound` and `Inbound`
newtypes of `RateLimit`.

This allows them to be used for the rate limiting method.

crates/radicle-protocol/src/service.rs

@@ -1313,7 +1313,7 @@ where
             Err(e) => error!(target: "service", "Error querying ban status for {ip}: {e}"),
         }
         let host: HostName = ip.into();
-        let tokens = RateLimit::from(self.config.limits.rate.inbound.clone());
+        let tokens = self.config.limits.rate.inbound;
 
         if self.limiter.limit(host.clone(), None, &tokens, self.clock) {
             trace!(target: "service", "Rate limiting inbound connection from {host}..");
@@ -1819,8 +1819,8 @@ where
         peer.last_active = self.clock;
 
         let limit: RateLimit = match peer.link {
-            Link::Outbound => self.config.limits.rate.outbound.clone().into(),
-            Link::Inbound => self.config.limits.rate.inbound.clone().into(),
+            Link::Outbound => self.config.limits.rate.outbound.into(),
+            Link::Inbound => self.config.limits.rate.inbound.into(),
         };
         if self
             .limiter

crates/radicle-protocol/src/service/limiter.rs

@@ -74,6 +74,26 @@ impl AsTokens for config::RateLimit {
     }
 }
 
+impl AsTokens for config::LimitRateInbound {
+    fn capacity(&self) -> usize {
+        config::RateLimit::from(*self).capacity()
+    }
+
+    fn rate(&self) -> f64 {
+        config::RateLimit::from(*self).rate()
+    }
+}
+
+impl AsTokens for config::LimitRateOutbound {
+    fn capacity(&self) -> usize {
+        config::RateLimit::from(*self).capacity()
+    }
+
+    fn rate(&self) -> f64 {
+        config::RateLimit::from(*self).rate()
+    }
+}
+
 #[derive(Debug, serde::Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct TokenBucket {

crates/radicle/src/node/config.rs

@@ -244,7 +244,7 @@ pub struct ConnectionLimits {
 }
 
 /// Rate limits for a single connection.
-#[derive(Debug, Clone, Serialize, Deserialize, Display)]
+#[derive(Debug, Clone, Copy, Serialize, Deserialize, Display)]
 #[display("RateLimit(fill_rate={fill_rate}, capacity={capacity})")]
 #[serde(rename_all = "camelCase")]
 #[cfg_attr(feature = "schemars", derive(schemars::JsonSchema))]
@@ -599,6 +599,18 @@ impl From<LimitGossipMaxAge> for LocalDuration {
     }
 }
 
+/// Create a new type (`$name`) around a given type (`$type`), with a provided
+/// default (`$default`).
+///
+/// The macro will attempt to derive any extra `$derive`s passed.
+///
+/// Note that the macro will provide the following traits automatically:
+///   - `Clone`
+///   - `Debug`
+///   - `Display`
+///   - `Serialize`
+///   - `Deserialize`
+///   - `From<$name> for $type`, i.e. can convert back into the original type
 macro_rules! wrapper {
     ($name:ident, $type:ty, $default:expr $(, $derive:ty)*) => {
         #[derive(Clone, Debug, Deserialize, Display, Serialize, From $(, $derive)*)]
@@ -631,7 +643,8 @@ wrapper!(
     RateLimit {
         fill_rate: 5.0,
         capacity: 1024,
-    }
+    },
+    Copy
 );
 wrapper!(LimitMaxOpenFiles, usize, 4096, Copy);
 wrapper!(
@@ -640,7 +653,8 @@ wrapper!(
     RateLimit {
         fill_rate: 10.0,
         capacity: 2048,
-    }
+    },
+    Copy
 );
 
 #[cfg(test)]