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: main.rs
    path of file: ./repos/darkfi/bin/darkfi-mmproxy/src
    
    the code of the file until where you have to start completion: /* This file is part of DarkFi (https://dark.fi)
 *
 * Copyright (C) 2020-2024 Dyne.org foundation
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

use std::{collections::HashMap, sync::Arc};

use darkfi::{
    async_daemonize, cli_desc,
    rpc::{
        jsonrpc::{JsonRequest, JsonResponse},
        util::JsonValue,
    },
    Error, Result,
};
use log::{debug, error, info};
use serde::Deserialize;
use smol::{stream::StreamExt, Executor};
use structopt::StructOpt;
use structopt_toml::StructOptToml;
use surf::StatusCode;
use url::Url;

const CONFIG_FILE: &str = "darkfi_mmproxy.toml";
const CONFIG_FILE_CONTENTS: &str = include_str!("../darkfi_mmproxy.toml");

/// Monero RPC functions
mod monerod;
use monerod::MonerodRequest;

#[derive(Clone, Debug, Deserialize, StructOpt, StructOptToml)]
#[serde(default)]
#[structopt(name = "
    
    async fn new(monerod: MonerodArgs) -> Result<Self> {
        let monero_network = match monerod.monero_network.to_lowercase().as_str() {
            "mainnet" => monero::Network::Mainnet,
            "testnet" => monero::Network::Testnet,
            _ => {
                error!("Invalid Monero network \"{}\"", monerod.monero_network);
                return Err(Error::Custom(format!(
                    "Invalid Monero network \"{}\"",
                    monerod.monero_network
                )))
            }
        };

        // Test that monerod RPC is reachable and is configured
        // with the matching network
        let self_ = Self { monero_network, monero_rpc: monerod.monero_rpc };

        let req = JsonRequest::new("getinfo", vec![].into());
        let rep: JsonResponse = match self_.monero_request(MonerodRequest::Post(req)).await {
            Ok(v) => JsonResponse::try_from(&v)?,
            Err(e) => {
                error!("Failed connecting to monerod RPC: {}", e);
                return Err(e)
            }
        };

        let Some(result) = rep.result.get::<HashMap<String, JsonValue>>() else {
            error!("Invalid response from monerod RPC");
            return Err(Error::Custom("Invalid response from monerod RPC".to_string()))
        };

        let nettype = result.get("nettype").unwrap().get::<String>().unwrap();

        let mut xmr_is_mainnet = false;
        let mut xmr_is_testnet = false;

        match nettype.as_str() {
            // Here we allow fakechain, which we get with monerod --regtest
            "mainnet" | "fakechain" => xmr_is_mainnet = true,
            "testnet" => xmr_is_testnet = true,
            _ => unimplemented!("Missing handler for network {}", nettype),
        }

        if xmr_is_mainnet && monero_network != monero::Network::Mainnet {
            error!("mmproxy requested testnet, but monerod is mainnet");
            return Err(Error::Custom("Monero network mismatch".to_string()))
        }

        if xmr_is_testnet && monero_network != monero::Network::Testnet {
            error!("mmproxy requested mainnet, but monerod is testnet");
            return Err(Error::Custom("Monero network mismatch".to_string()))
        }

        Ok(self_)
    }