use std::collections::BTreeMap;
use std::time::{SystemTime, UNIX_EPOCH};
use serde_json::Value;
use crate::error::*;
pub fn build_request(parameters: &BTreeMap<String, String>) -> String {
let mut request = String::new();
for (key, value) in parameters {
let param = format!("{}={}&", key, value);
request.push_str(param.as_ref());
}
request.pop();
request
}
pub fn build_signed_request(
mut parameters: BTreeMap<String, String>, recv_window: u64,
) -> Result<String, BinanceErr> {
if recv_window > 0 {
parameters.insert("recvWindow".into(), recv_window.to_string());
}
if let Ok(timestamp) = get_timestamp() {
parameters.insert("timestamp".into(), timestamp.to_string());
let mut request = String::new();
for (key, value) in ¶meters {
let param = format!("{}={}&", key, value);
request.push_str(param.as_ref());
}
request.pop();
Ok(request)
} else {
Err(BinanceErr::from_str(format!("Failed to get timestamp")))
}
}
pub fn to_i64(v: &Value) -> i64 {
v.as_i64().unwrap()
}
pub fn to_f64(v: &Value) -> f64 {
v.as_str().unwrap().parse().unwrap()
}
fn get_timestamp() -> Result<u64, BinanceErr> {
let start = SystemTime::now();
let since_epoch = start.duration_since(UNIX_EPOCH)?;
Ok(since_epoch.as_secs() * 1000 + u64::from(since_epoch.subsec_nanos()) / 1_000_000)
}