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# karyons jsonrpc
A fast and lightweight async [JSONRPC2.0](https://www.jsonrpc.org/specification) implementation.
## Example
```rust
use std::sync::Arc;
use serde_json::Value;
use karyons_jsonrpc::{JsonRPCError, Server, Client, register_service};
struct HelloWorld {}
impl HelloWorld {
async fn say_hello(&self, params: Value) -> Result<Value, JsonRPCError> {
let msg: String = serde_json::from_value(params)?;
Ok(serde_json::json!(format!("Hello {msg}!")))
}
}
//////////////////
// Server
//////////////////
let ex = Arc::new(smol::Executor::new());
// Creates a new server
let endpoint = "tcp://127.0.0.1:60000".parse().unwrap();
let server = Server::new_with_endpoint(&endpoint, ex.clone()).await.unwrap();
// Register the HelloWorld service
register_service!(HelloWorld, say_hello);
server.attach_service(HelloWorld{});
// Starts the server
ex.run(server.start());
//////////////////
// Client
//////////////////
// Creates a new client
let endpoint = "tcp://127.0.0.1:60000".parse().unwrap();
let client = Client::new_with_endpoint(&endpoint, None).await.unwrap();
let result: String = client.call("HelloWorld.say_hello", "world".to_string()).await.unwrap();
```
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