Scaffold utility and library (#3)

Signed-off-by: Cyrill Leutwiler <bigcyrill@hotmail.com>
Signed-off-by: xermicus <bigcyrill@hotmail.com>

crates/node-interaction/src/trace.rs

@@ -0,0 +1,43 @@
+//! Trace transactions in a sync context.
+
+use std::pin::Pin;
+
+use alloy::rpc::types::trace::geth::GethTrace;
+use tokio::sync::oneshot;
+
+use crate::TO_TOKIO;
+use crate::tokio_runtime::AsyncNodeInteraction;
+
+pub type Task = Pin<Box<dyn Future<Output = anyhow::Result<GethTrace>> + Send>>;
+
+pub(crate) struct Trace {
+    sender: oneshot::Sender<anyhow::Result<GethTrace>>,
+    task: Task,
+}
+
+impl AsyncNodeInteraction for Trace {
+    type Output = anyhow::Result<GethTrace>;
+
+    fn split(
+        self,
+    ) -> (
+        std::pin::Pin<Box<dyn Future<Output = Self::Output> + Send>>,
+        oneshot::Sender<Self::Output>,
+    ) {
+        (self.task, self.sender)
+    }
+}
+
+/// Execute some [Task] that return a [GethTrace] result.
+pub fn trace_transaction(task: Task) -> anyhow::Result<GethTrace> {
+    let task_sender = TO_TOKIO.lock().unwrap().trace_sender.clone();
+    let (sender, receiver) = oneshot::channel();
+
+    task_sender
+        .blocking_send(Trace { task, sender })
+        .expect("we are not calling this from an async context");
+
+    receiver
+        .blocking_recv()
+        .unwrap_or_else(|error| anyhow::bail!("no trace received: {error}"))
+}