Make system properties an arbitrary JSON object, plus CI fixes (#349)

* Make system properties an arbitrary JSON object

* Add comment

* Make timestamp test more reliable

* Fmt

* Update src/client.rs

Co-authored-by: David <dvdplm@gmail.com>

* Update src/client.rs

Co-authored-by: David <dvdplm@gmail.com>

* Fix clippy errors and warnings

* Fix tests

Co-authored-by: David <dvdplm@gmail.com>

src/client.rs

@@ -157,7 +157,14 @@ impl<T: Config> Client<T> {
         &self.metadata
     }
 
-    /// Returns the system properties
+    /// Returns the properties defined in the chain spec as a JSON object.
+    ///
+    /// # Note
+    ///
+    /// Many chains use this to define common properties such as `token_decimals` and `token_symbol`
+    /// required for UIs, but this is merely a convention. It is up to the library user to
+    /// deserialize the JSON into the appropriate type or otherwise extract the properties defined
+    /// in the target chain's spec.
     pub fn properties(&self) -> &SystemProperties {
         &self.properties
     }

src/metadata.rs

@@ -143,6 +143,11 @@ pub struct PalletMetadata {
 }
 
 impl PalletMetadata {
+    /// Get the name of the pallet.
+    pub fn name(&self) -> &str {
+        &self.name
+    }
+
     /// Encode a call based on this pallet metadata.
     pub fn encode_call<C>(&self, call: &C) -> Result<Encoded, MetadataError>
     where

src/rpc.rs

@@ -141,17 +141,8 @@ impl From<u32> for BlockNumber {
     }
 }
 
-/// System properties for a Substrate-based runtime
-#[derive(serde::Serialize, Deserialize, Debug, Clone, PartialEq, Eq, Default)]
-#[serde(rename_all = "camelCase")]
-pub struct SystemProperties {
-    /// The address format
-    pub ss58_format: u8,
-    /// The number of digits after the decimal point in the native token
-    pub token_decimals: u8,
-    /// The symbol of the native token
-    pub token_symbol: String,
-}
+/// Arbitrary properties defined in the chain spec as a JSON object.
+pub type SystemProperties = serde_json::Map<String, serde_json::Value>;
 
 /// Possible transaction status events.
 ///