barter-data 0.11.0

High performance & normalised WebSocket intergration for leading cryptocurrency exchanges - batteries included.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58

use super::Binance;
use crate::{Identifier, instrument::MarketInstrumentData, subscription::Subscription};
use barter_instrument::{
    Keyed, asset::name::AssetNameInternal, instrument::market_data::MarketDataInstrument,
};
use serde::{Deserialize, Serialize};
use smol_str::{SmolStr, StrExt, format_smolstr};

/// Type that defines how to translate a Barter [`Subscription`] into a [`Binance`]
/// market that can be subscribed to.
///
/// See docs: <https://binance-docs.github.io/apidocs/spot/en/#websocket-market-streams>
/// See docs: <https://binance-docs.github.io/apidocs/futures/en/#websocket-market-streams>
#[derive(Clone, Eq, PartialEq, Ord, PartialOrd, Hash, Debug, Deserialize, Serialize)]
pub struct BinanceMarket(pub SmolStr);

impl<Server, Kind> Identifier<BinanceMarket>
    for Subscription<Binance<Server>, MarketDataInstrument, Kind>
{
    fn id(&self) -> BinanceMarket {
        binance_market(&self.instrument.base, &self.instrument.quote)
    }
}

impl<Server, InstrumentKey, Kind> Identifier<BinanceMarket>
    for Subscription<Binance<Server>, Keyed<InstrumentKey, MarketDataInstrument>, Kind>
{
    fn id(&self) -> BinanceMarket {
        binance_market(
            &self.instrument.as_ref().base,
            &self.instrument.as_ref().quote,
        )
    }
}

impl<Server, InstrumentKey, Kind> Identifier<BinanceMarket>
    for Subscription<Binance<Server>, MarketInstrumentData<InstrumentKey>, Kind>
{
    fn id(&self) -> BinanceMarket {
        BinanceMarket(self.instrument.name_exchange.name().clone())
    }
}

impl AsRef<str> for BinanceMarket {
    fn as_ref(&self) -> &str {
        &self.0
    }
}

pub(in crate::exchange::binance) fn binance_market(
    base: &AssetNameInternal,
    quote: &AssetNameInternal,
) -> BinanceMarket {
    // Notes:
    // - Must be lowercase when subscribing (transformed to lowercase by Binance fn requests).
    // - Must be uppercase since Binance sends message with uppercase MARKET (eg/ BTCUSDT).
    BinanceMarket(format_smolstr!("{base}{quote}").to_uppercase_smolstr())
}