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# karyon jsonrpc
A fast and lightweight async implementation of [JSON-RPC
2.0](https://www.jsonrpc.org/specification).
features:
- Supports TCP, TLS, WebSocket, and Unix protocols.
- Uses smol(async-std) as the async runtime, but also supports tokio via the
`tokio` feature.
- Allows registration of multiple services (structs) of different types on a
single server.
## Example
```rust
use std::sync::Arc;
use serde_json::Value;
use karyon_jsonrpc::{Error, Server, Client, rpc_impl};
struct HelloWorld {}
#[rpc_impl]
impl HelloWorld {
async fn say_hello(&self, params: Value) -> Result<Value, Error> {
let msg: String = serde_json::from_value(params)?;
Ok(serde_json::json!(format!("Hello {msg}!")))
}
async fn foo(&self, params: Value) -> Result<Value, Error> {
Ok(serde_json::json!("foo!"))
}
async fn bar(&self, params: Value) -> Result<Value, Error> {
Ok(serde_json::json!("bar!"))
}
}
// Server
async {
// Creates a new server
let server = Server::builder("tcp://127.0.0.1:60000")
.expect("create new server builder")
.service(HelloWorld{})
.build()
.await
.expect("build the server");
// Starts the server
server.start().await.expect("start the server");
};
// Client
async {
// Creates a new client
let client = Client::builder("tcp://127.0.0.1:60000")
.expect("create new client builder")
.build()
.await
.expect("build the client");
let result: String = client.call("HelloWorld.say_hello", "world".to_string())
.await
.expect("send a request");
};
```
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