You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: local_file.rs
    path of file: ./repos/dev-manager-desktop/src-tauri/src/plugins
    
    the code of the file until where you have to start completion: use std::env::temp_dir;
use tauri::plugin::{Builder, TauriPlugin};
use tauri::Runtime;
use tokio::fs::File;
use tokio::io::{AsyncReadExt, AsyncWriteExt};
use uuid::Uuid;

use crate::error::Error;

#[tauri::command]
async fn checksum(path: String, algorithm: String) -> Result<String, Error> {
    let mut file = File::open(&path).await?;
    let mut contents: Vec<u8> = vec![];
    file.read_t
    
async fn download(url: String, target: String) -> Result<(), Error> {
    let mut response = reqwest::get(&url)
        .await
        .map_err(|e| Error::new(format!("Failed to request {}: {}", url, e)))?;
    let mut file = File::create(&target)
        .await
        .map_err(|e| Error::new(format!("Failed to open {} for download: {}", target, e)))?;
    while let Some(chunk) = response
        .chunk()
        .await
        .map_err(|e| Error::new(format!("Failed to fetch {}: {}", url, e)))?
    {
        file.write(&chunk)
            .await
            .map_err(|e| Error::new(format!("Failed to save downloaded file to {}: {}", url, e)))?;
    }
    return Ok(());
}