Add first ExecutionLayer tests

beacon_node/execution_layer/src/test_utils/handle_rpc.rs

@@ -1,10 +1,61 @@
 use super::Context;
+use crate::engine_api::http::*;
+use serde_json::Value as JsonValue;
 use std::sync::Arc;
 use types::EthSpec;
 
 pub async fn handle_rpc<T: EthSpec>(
-    body: serde_json::Value,
+    body: JsonValue,
     ctx: Arc<Context<T>>,
-) -> Result<serde_json::Value, String> {
-    todo!("handle_rpc")
+) -> Result<JsonValue, String> {
+    let method = body
+        .get("method")
+        .and_then(JsonValue::as_str)
+        .ok_or_else(|| "missing/invalid method field".to_string())?;
+
+    let params = body
+        .get("params")
+        .ok_or_else(|| "missing/invalid params field".to_string())?;
+
+    match method {
+        ETH_SYNCING => Ok(JsonValue::Bool(false)),
+        ETH_GET_BLOCK_BY_NUMBER => {
+            let tag = params
+                .get(0)
+                .and_then(JsonValue::as_str)
+                .ok_or_else(|| "missing/invalid params[0] value".to_string())?;
+
+            match tag {
+                "latest" => Ok(serde_json::to_value(
+                    ctx.execution_block_generator.read().await.latest_block(),
+                )
+                .unwrap()),
+                other => Err(format!("The tag {} is not supported", other)),
+            }
+        }
+        ETH_GET_BLOCK_BY_HASH => {
+            let hash = params
+                .get(0)
+                .and_then(JsonValue::as_str)
+                .ok_or_else(|| "missing/invalid params[0] value".to_string())
+                .and_then(|s| {
+                    s.parse()
+                        .map_err(|e| format!("unable to parse hash: {:?}", e))
+                })?;
+
+            Ok(serde_json::to_value(
+                ctx.execution_block_generator
+                    .read()
+                    .await
+                    .block_by_hash(hash),
+            )
+            .unwrap())
+        }
+        ENGINE_CONSENSUS_VALIDATED => Ok(JsonValue::Null),
+        ENGINE_FORKCHOICE_UPDATED => Ok(JsonValue::Null),
+        other => Err(format!(
+            "The method {} does not exist/is not available",
+            other
+        )),
+    }
 }