crypto-pair 2.3.20

Parse exchange-specific symbols to unified format
Documentation 
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use crypto_market_type::MarketType;

pub(crate) fn normalize_pair(symbol: &str) -> Option<String> {
    if symbol.ends_with("_SPBL")
        || symbol.contains("_UMCBL")
        || symbol.contains("_CMCBL")
        || symbol.contains("_DMCBL")
    {
        let pos = symbol.find('_').unwrap();
        let pair = &symbol[..pos];
        if symbol == "SBTCSUSDT_SPBL" {
            Some("SBTC/SUSDT".to_string())
        } else if symbol.ends_with("PERP_CMCBL") {
            Some(format!("{}/USDC", symbol.strip_suffix("PERP_CMCBL").unwrap()))
        } else if pair.ends_with("USDT") {
            Some(format!("{}/USDT", pair.strip_suffix("USDT").unwrap()))
        } else if pair.ends_with("USD") {
            Some(format!("{}/USD", pair.strip_suffix("USD").unwrap()))
        } else if pair.ends_with("ETH") {
            Some(format!("{}/ETH", pair.strip_suffix("ETH").unwrap()))
        } else if pair.ends_with("BTC") {
            Some(format!("{}/BTC", pair.strip_suffix("BTC").unwrap()))
        } else {
            panic!("Failed to parse {symbol}");
        }
    } else {
        #[allow(clippy::collapsible_else_if)]
        if symbol.starts_with("cmt_") {
            // linear swap
            assert!(symbol.ends_with("usdt"));
            let base = &symbol[4..symbol.len() - 4];
            Some(format!("{base}/usdt").to_uppercase())
        } else if symbol.contains('_') {
            // spot
            Some(symbol.replace('_', "/").to_uppercase())
        } else if symbol.ends_with("usd") {
            // inverse swap
            let base = symbol.strip_suffix("usd").unwrap();
            Some(format!("{base}/usd").to_uppercase())
        } else {
            None
        }
    }
}

pub(crate) fn get_market_type(symbol: &str) -> MarketType {
    if symbol.ends_with("_SPBL")
        || symbol.contains("_UMCBL")
        || symbol.contains("_CMCBL")
        || symbol.contains("_DMCBL")
    {
        // bitget v3 API
        if symbol.ends_with("_SPBL") {
            MarketType::Spot
        } else if symbol.ends_with("_UMCBL") || symbol.ends_with("_CMCBL") {
            MarketType::LinearSwap
        } else if symbol.ends_with("_DMCBL") {
            MarketType::InverseSwap
        } else if symbol.contains("_UMCBL_") | symbol.contains("_CMCBL_") {
            MarketType::LinearFuture
        } else if symbol.contains("_DMCBL_") {
            MarketType::InverseFuture
        } else {
            MarketType::Unknown
        }
    } else {
        // deprecated bitget v1 API
        if symbol.starts_with("cmt_") {
            MarketType::LinearSwap
        } else if symbol.contains('_') {
            MarketType::Spot
        } else if symbol.ends_with("usd") {
            MarketType::InverseSwap
        } else {
            MarketType::Unknown
        }
    }
}

#[cfg(test)]
mod tests {
    use crypto_market_type::MarketType;

    #[test]
    fn test_get_market_type() {
        assert_eq!(MarketType::InverseFuture, super::get_market_type("BTCUSD_DMCBL_221230"));
        assert_eq!(MarketType::LinearSwap, super::get_market_type("BTCPERP_CMCBL"));
    }

    #[test]
    fn test_normalize_pair() {
        assert_eq!("SBTC/SUSDT", super::normalize_pair("SBTCSUSDT_SPBL").unwrap());
        assert_eq!("EOS/USDT", super::normalize_pair("EOSUSDT_SPBL").unwrap());
        assert_eq!("BTC/USD", super::normalize_pair("BTCUSD_DMCBL_221230").unwrap());
        assert_eq!("BTC/USDC", super::normalize_pair("BTCPERP_CMCBL").unwrap());
    }
}