服务管理

提供处理服务的实用工具，这些工具主要用于节点管理器。

RPC操作

RpcActions trait定义了与safenode交互的当前协议

node_info: Returns information about the node, such as its peer ID and version.
network_info: Retrieves network-related information, such as the peers currently connected to the node.
record_addresses: Provides a list of the node's record addresses.
restart_node: Requests the node to restart.
stop_node: Requests the node to stop its operations.
update_node: Updates the node with provided parameters.

crate的使用者可以针对trait编程，而不是针对RpcClient实现。

这可以方便进行基于行为的功能测试，例如

use mockall::mock;
use mockall::predicate::*;

mock! {
    pub RpcClient {}
    #[async_trait]
    impl RpcClientInterface for RpcClient {
        async fn node_info(&self) -> RpcResult<NodeInfo>;
        async fn network_info(&self) -> RpcResult<NetworkInfo>;
        async fn record_addresses(&self) -> Result<Vec<RecordAddress>>;
        async fn gossipsub_subscribe(&self, topic: &str) -> Result<()>;
        async fn gossipsub_unsubscribe(&self, topic: &str) -> Result<()>;
        async fn gossipsub_publish(&self, topic: &str, message: &str) -> Result<()>;
        async fn node_restart(&self, delay_millis: u64) -> Result<()>;
        async fn node_stop(&self, delay_millis: u64) -> Result<()>;
        async fn node_update(&self, delay_millis: u64) -> Result<()>;
    }
}