use hex::encode as hex_encode;
use hmac::{Hmac, Mac, NewMac};
use reqwest::{Response, StatusCode};
use reqwest::header::{CONTENT_TYPE, HeaderMap, HeaderName, HeaderValue, USER_AGENT};
use sha2::Sha256;
use crate::error::BinanceErr;
use crate::error::other_err::*;
#[derive(Clone)]
pub struct Client {
api_key: String,
secret_key: String,
host: String,
}
impl Client {
pub fn new(api_key: Option<String>, secret_key: Option<String>, host: String) -> Self {
Client {
api_key: api_key.unwrap_or_else(|| "".into()),
secret_key: secret_key.unwrap_or_else(|| "".into()),
host,
}
}
pub async fn get_signed(&self, endpoint: &str, request: &str) -> Result<String, BinanceErr> {
let url = self.sign_request(endpoint, request).await;
let client = reqwest::Client::new();
let response = client
.get(url.as_str())
.headers(self.build_headers(true)?)
.send()
.await?;
self.handler(response).await
}
pub async fn post_signed(&self, endpoint: &str, request: &str) -> Result<String, BinanceErr> {
let url = self.sign_request(endpoint, request).await;
let client = reqwest::Client::new();
let response = client
.post(url.as_str())
.headers(self.build_headers(true)?)
.send()
.await?;
self.handler(response).await
}
pub async fn delete_signed(&self, endpoint: &str, request: &str) -> Result<String, BinanceErr> {
let url = self.sign_request(endpoint, request).await;
let client = reqwest::Client::new();
let response = client
.delete(url.as_str())
.headers(self.build_headers(true)?)
.send()
.await?;
self.handler(response).await
}
pub async fn get(&self, endpoint: &str, request: &str) -> Result<String, BinanceErr> {
let mut url: String = format!("{}{}", self.host, endpoint);
if !request.is_empty() {
url.push_str(format!("?{}", request).as_str());
}
let response = reqwest::get(url.as_str()).await?;
self.handler(response).await
}
pub async fn post(&self, endpoint: &str) -> Result<String, BinanceErr> {
let url: String = format!("{}{}", self.host, endpoint);
let client = reqwest::Client::new();
let response = client
.post(url.as_str())
.headers(self.build_headers(false)?)
.send()
.await?;
self.handler(response).await
}
pub async fn put(&self, endpoint: &str, listen_key: &str) -> Result<String, BinanceErr> {
let url: String = format!("{}{}", self.host, endpoint);
let data: String = format!("listenKey={}", listen_key);
let client = reqwest::Client::new();
let response = client
.put(url.as_str())
.headers(self.build_headers(false)?)
.body(data)
.send()
.await?;
self.handler(response).await
}
pub async fn delete(&self, endpoint: &str, listen_key: &str) -> Result<String, BinanceErr> {
let url: String = format!("{}{}", self.host, endpoint);
let data: String = format!("listenKey={}", listen_key);
let client = reqwest::Client::new();
let response = client
.delete(url.as_str())
.headers(self.build_headers(false)?)
.body(data)
.send()
.await?;
self.handler(response).await
}
async fn sign_request(&self, endpoint: &str, request: &str) -> String {
let mut signed_key = Hmac::<Sha256>::new_varkey(self.secret_key.as_bytes()).unwrap();
signed_key.update(request.as_bytes());
let signature = hex_encode(signed_key.finalize().into_bytes());
let request_body: String = format!("{}&signature={}", request, signature);
let url: String = format!("{}{}?{}", self.host, endpoint, request_body);
url
}
fn build_headers(&self, content_type: bool) -> Result<HeaderMap, BinanceErr> {
let mut custom_headers = HeaderMap::new();
custom_headers.insert(USER_AGENT, HeaderValue::from_static("binance-rs"));
if content_type {
custom_headers.insert(
CONTENT_TYPE,
HeaderValue::from_static("application/x-www-form-urlencoded"),
);
}
custom_headers.insert(
HeaderName::from_static("x-mbx-apikey"),
HeaderValue::from_str(self.api_key.as_str())?,
);
Ok(custom_headers)
}
async fn handler(&self, response: Response) -> Result<String, BinanceErr> {
match response.status() {
StatusCode::OK => {
Ok(response.text().await?)
}
StatusCode::INTERNAL_SERVER_ERROR => {
Err(BinanceErr::from_str(format!("Internal Server Error")))
}
StatusCode::SERVICE_UNAVAILABLE => {
Err(BinanceErr::from_str(format!("Service Unavailable")))
}
StatusCode::UNAUTHORIZED => {
Err(BinanceErr::from_str(format!("Unauthorized")))
}
StatusCode::BAD_REQUEST => {
Err(BinanceErr::BinanceContentError(response.json::<BinanceContentError>().await?))
}
s => {
Err(BinanceErr::from_str(format!("Received response: {:?}", s)))
}
}
}
}