feat(jstzd): define Task trait

Cargo.toml

@@ -12,6 +12,7 @@ members = [
   "crates/jstz_rollup",
   "crates/jstz_sdk",
   "crates/jstz_wpt",
+  "crates/jstzd",
   "crates/octez"
 ]
 
@@ -98,6 +99,8 @@ tokio-util = "0.7.10"
 url = "2.4.1"
 urlpattern = "0.2.0"
 wasm-bindgen = "0.2.92"
+async-dropper = { version = "0.3.1", features = ["tokio", "simple"] }
+async-trait = "0.1.82"
 
 [workspace.dependencies.tezos-smart-rollup]
 version = "0.2.2"

crates/jstzd/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "jstzd"
+authors.workspace = true
+version.workspace = true
+edition.workspace = true
+repository.workspace = true
+
+[dependencies]
+anyhow.workspace = true
+tokio.workspace = true
+async-dropper.workspace = true
+async-trait.workspace = true
+futures-util.workspace = true

crates/jstzd/src/lib.rs

@@ -0,0 +1 @@
+pub mod task;

crates/jstzd/src/task/mod.rs

@@ -0,0 +1,16 @@
+use anyhow::Result;
+use async_trait::async_trait;
+
+#[async_trait]
+pub trait Task: Sized {
+    type Config;
+
+    /// Spins up the task with the given config.
+    async fn spawn(config: Self::Config) -> Result<Self>;
+
+    /// Aborts the running task.
+    async fn kill(&mut self) -> Result<()>;
+
+    /// Conducts a health check on the running task.
+    async fn health_check(&self) -> Result<bool>;
+}