feat: Remove unnecessary null check

coordinator/src/registry.rs

@@ -233,30 +233,25 @@ impl RegistryImpl {
             .context("Failed to fetch indexer")?;
 
         if let QueryResponseKind::CallResult(call_result) = response.kind {
-            // Handle case where call returns successfully but returns null due to not matching
-            let raw_json: Value = serde_json::from_slice(&call_result.result)
-                .context("Failed to deserialize config from JSON provided by RPC call")?;
-            if raw_json.is_null() {
-                return Ok(None);
-            }
-
-            // Handle case where we now expect returned JSON to actually parse into config
-            let config: registry_types::IndexerConfig =
-                serde_json::from_slice::<registry_types::IndexerConfig>(&call_result.result)
+            let config: Option<registry_types::IndexerConfig> =
+                serde_json::from_slice(&call_result.result)
                     .context("Failed to deserialize config from JSON provided by RPC call")?;
-            let indexer = IndexerConfig {
-                account_id: account_id.clone(),
-                function_name: function_name.to_string(),
-                code: config.code,
-                schema: config.schema,
-                rule: config.rule,
-                start_block: config.start_block,
-                updated_at_block_height: config.updated_at_block_height,
-                created_at_block_height: config.created_at_block_height,
-                deleted_at_block_height: config.deleted_at_block_height,
-            };
 
-            return Ok(Some(indexer));
+            return if let Some(config) = config {
+                Ok(Some(IndexerConfig {
+                    account_id: account_id.clone(),
+                    function_name: function_name.to_string(),
+                    code: config.code,
+                    schema: config.schema,
+                    rule: config.rule,
+                    start_block: config.start_block,
+                    updated_at_block_height: config.updated_at_block_height,
+                    created_at_block_height: config.created_at_block_height,
+                    deleted_at_block_height: config.deleted_at_block_height,
+                }))
+            } else {
+                Ok(None)
+            };
         }
 
         anyhow::bail!("Invalid registry response")