Function withRefAsync

withRefAsync<T, R>(ctx, token, fn): Promise<R>
Async RAII pattern: acquire a ref, await fn, auto-release.
Type Parameters
- T
  The service type.
- R
  The return type of fn.
Parameters
- ctx: SynapseContext
  The context to acquire from.
- token: ServiceToken<T>
  The service token.
- fn: ((service: T) => Promise<R>)
  Async function that receives the unwrapped service.
  - - (service): Promise<R>
    - Parameters
      service: T
      Returns Promise<R>
Returns Promise<R>
The return value of fn.
Since
1.2.0
Example
```
const balance = await withRefAsync(ctx, Tokens.RPC, async rpc => {
  return rpc.getBalance(pubkey);
});
// ref is auto-released after await
```
- Defined in src/context/hooks.ts:489