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use super::utils::{fetch_ws_token, KucoinMessageHandler, EXCHANGE_NAME, UPLINK_LIMIT};
use crate::{
clients::common_traits::{
Candlestick, Level3OrderBook, OrderBook, OrderBookTopK, Ticker, Trade, BBO,
},
common::{command_translator::CommandTranslator, ws_client_internal::WSClientInternal},
WSClient,
};
use async_trait::async_trait;
use std::sync::mpsc::Sender;
pub struct KuCoinSwapWSClient {
client: WSClientInternal<KucoinMessageHandler>,
translator: KucoinCommandTranslator,
}
impl KuCoinSwapWSClient {
pub async fn new(tx: Sender<String>, url: Option<&str>) -> Self {
let real_url = match url {
Some(endpoint) => endpoint.to_string(),
None => {
let ws_token = fetch_ws_token().await;
let ws_url = format!("{}?token={}", ws_token.endpoint, ws_token.token);
ws_url
}
};
KuCoinSwapWSClient {
client: WSClientInternal::connect(
EXCHANGE_NAME,
&real_url,
KucoinMessageHandler {},
Some(UPLINK_LIMIT),
tx,
)
.await,
translator: KucoinCommandTranslator {},
}
}
}
#[rustfmt::skip]
impl_trait!(Trade, KuCoinSwapWSClient, subscribe_trade, "/contractMarket/execution");
#[rustfmt::skip]
impl_trait!(BBO, KuCoinSwapWSClient, subscribe_bbo, "/contractMarket/tickerV2");
#[rustfmt::skip]
impl_trait!(OrderBook, KuCoinSwapWSClient, subscribe_orderbook, "/contractMarket/level2");
#[rustfmt::skip]
impl_trait!(OrderBookTopK, KuCoinSwapWSClient, subscribe_orderbook_topk, "/contractMarket/level2Depth5");
#[rustfmt::skip]
impl_trait!(Ticker, KuCoinSwapWSClient, subscribe_ticker, "/contractMarket/snapshot");
impl_candlestick!(KuCoinSwapWSClient);
panic_l3_orderbook!(KuCoinSwapWSClient);
impl_ws_client_trait!(KuCoinSwapWSClient);
struct KucoinCommandTranslator {}
impl KucoinCommandTranslator {
fn to_candlestick_channel(symbol: &str, interval: usize) -> String {
let valid_set: Vec<usize> =
vec![60, 300, 900, 1800, 3600, 7200, 14400, 28800, 43200, 86400, 604800];
if !valid_set.contains(&interval) {
let joined =
valid_set.into_iter().map(|x| x.to_string()).collect::<Vec<String>>().join(",");
panic!("KuCoin Swap available intervals {joined}");
}
format!("{}_{}", symbol, interval / 60)
}
}
impl CommandTranslator for KucoinCommandTranslator {
fn translate_to_commands(&self, subscribe: bool, topics: &[(String, String)]) -> Vec<String> {
super::utils::topics_to_commands(topics, subscribe)
}
fn translate_to_candlestick_commands(
&self,
subscribe: bool,
symbol_interval_list: &[(String, usize)],
) -> Vec<String> {
let topics = symbol_interval_list
.iter()
.map(|(symbol, interval)| {
(
"/contractMarket/candle".to_string(),
Self::to_candlestick_channel(symbol, *interval),
)
})
.collect::<Vec<(String, String)>>();
self.translate_to_commands(subscribe, &topics)
}
}
#[cfg(test)]
mod tests {
use crate::common::command_translator::CommandTranslator;
#[test]
fn test_one_channel() {
let translator = super::KucoinCommandTranslator {};
let commands = translator.translate_to_commands(
true,
&[("/contractMarket/execution".to_string(), "BTC_USD".to_string())],
);
assert_eq!(1, commands.len());
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/execution:BTC_USD","privateChannel":false,"response":true}"#,
commands[0]
);
let commands = translator.translate_to_commands(
true,
&[
("/contractMarket/execution".to_string(), "BTC_USD".to_string()),
("/contractMarket/execution".to_string(), "ETH_USD".to_string()),
],
);
assert_eq!(1, commands.len());
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/execution:BTC_USD,ETH_USD","privateChannel":false,"response":true}"#,
commands[0]
);
}
#[test]
fn test_two_channels() {
let translator = super::KucoinCommandTranslator {};
let commands = translator.translate_to_commands(
true,
&[
("/contractMarket/execution".to_string(), "BTC_USD".to_string()),
("/contractMarket/level2".to_string(), "ETH_USD".to_string()),
],
);
assert_eq!(2, commands.len());
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/execution:BTC_USD","privateChannel":false,"response":true}"#,
commands[0]
);
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/level2:ETH_USD","privateChannel":false,"response":true}"#,
commands[1]
);
let commands = translator.translate_to_commands(
true,
&[
("/contractMarket/execution".to_string(), "BTC_USD".to_string()),
("/contractMarket/execution".to_string(), "ETH_USD".to_string()),
("/contractMarket/level2".to_string(), "BTC_USD".to_string()),
("/contractMarket/level2".to_string(), "ETH_USD".to_string()),
],
);
assert_eq!(2, commands.len());
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/execution:BTC_USD,ETH_USD","privateChannel":false,"response":true}"#,
commands[0]
);
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/level2:BTC_USD,ETH_USD","privateChannel":false,"response":true}"#,
commands[1]
);
}
#[test]
fn test_candlestick() {
let translator = super::KucoinCommandTranslator {};
let commands = translator.translate_to_candlestick_commands(
true,
&[("BTC_USD".to_string(), 300), ("ETH_USD".to_string(), 60)],
);
assert_eq!(1, commands.len());
assert_eq!(
r#"{"id":"crypto-ws-client","type":"subscribe","topic":"/contractMarket/candle:BTC_USD_5,ETH_USD_1","privateChannel":false,"response":true}"#,
commands[0]
);
}
}