tutorialone-rust/src/main.rs

use std::collections::HashMap;
use reqwest::header::HeaderMap;
#[tokio::main]
pub async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let res = reqwest::get("https://httpbin.org/ip")
        .await?
        .json::<HashMap<String, String>>()
        .await?;

    println!("Body:\n{:#?}", res);

    get_bitcoin_price().await?;

    Ok(())
}

pub async fn get_bitcoin_price() -> Result<(), Box<dyn std::error::Error>> {


    let url = "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest";
    let mut h = HeaderMap::new();
    h.insert("content-type", "application/json".parse().unwrap());
    h.insert("X-CMC_PRO_API_KEY","<API_KEY>".parse().unwrap());
    let mut params = HashMap::new();
    params.insert("symbol", "BTC");
    let res = reqwest::Client::new()
        .get(url)
        .headers(h)
        .query(&params)
        .send()
        .await?;

    println!("BTC Price {:#?}", res);
    Ok(())
}