feat: global runtime (#21934)

examples/custom-engine-types/src/main.rs

@@ -54,7 +54,7 @@ use reth_ethereum::{
     primitives::{Block, SealedBlock},
     provider::{EthStorage, StateProviderFactory},
     rpc::types::engine::ExecutionPayload,
-    tasks::TaskManager,
+    tasks::Runtime,
     EthPrimitives, TransactionSigned,
 };
 use reth_ethereum_payload_builder::{EthereumBuilderConfig, EthereumExecutionPayloadValidator};
@@ -391,7 +391,7 @@ where
 async fn main() -> eyre::Result<()> {
     let _guard = RethTracer::new().init()?;
 
-    let tasks = TaskManager::current();
+    let runtime = Runtime::with_existing_handle(tokio::runtime::Handle::current())?;
 
     // create genesis with canyon at block 2
     let spec = ChainSpec::builder()
@@ -407,7 +407,7 @@ async fn main() -> eyre::Result<()> {
         NodeConfig::test().with_rpc(RpcServerArgs::default().with_http()).with_chain(spec);
 
     let handle = NodeBuilder::new(node_config)
-        .testing_node(tasks.executor())
+        .testing_node(runtime)
         .launch_node(MyCustomNode::default())
         .await
         .unwrap();