This is a minimal interface for the [Kraken exchange REST API](https://docs.kraken.com/rest/) using the [async-std](https://async.rs/) runtime.

Being a minimal interface for the API there is just a single method which takes the endpoint name and the parameters as a [Value](https://docs.serde.rs/serde_json/value/enum.Value.html) object from [serde_json](https://docs.serde.rs/serde_json/).  

When querying a private endpoint this library will handle and properly sing the petition to Kraken.

# Prerequisites
To use the **```private```** endpoints you will need to generate an **```API-Key```** and an **```API-Secret```** to authenticate to the desired Kraken account.  
[How to generate an API key pair?](https://support.kraken.com/hc/en-us/articles/360000919966-How-to-generate-an-API-key-pair-)

# Usage
Create the ``KrakenClient`` object with ``new()`` or ``with_credentials(key, secret)`` based on your needs.  

Then call ``api_request(endpoint_name, payload)``. It will return a JSON for you to handle or an error message. You can read about the payload for each endpoint and the returned JSON in the [API documentation](https://docs.kraken.com/rest/).

Available **Public** Endpoint Names:  
[Time](https://docs.kraken.com/rest/#operation/getServerTime),
[SystemStatus](https://docs.kraken.com/rest/#operation/getSystemStatus),
[Assets](https://docs.kraken.com/rest/#operation/getAssetInfo),
[AssetPairs](https://docs.kraken.com/rest/#operation/getTradableAssetPairs),
[Ticker](https://docs.kraken.com/rest/#operation/getTickerInformation),
[OHLC](https://docs.kraken.com/rest/#operation/getOHLCData),
[Depth](https://docs.kraken.com/rest/#operation/getOrderBook),
[Trades](https://docs.kraken.com/rest/#operation/getRecentTrades),
[Spread](https://docs.kraken.com/rest/#operation/getRecentSpreads). 
 
Available **Private** Endpoint Names:  
*User Data*  
[Balance](https://docs.kraken.com/rest/#operation/getAccountBalance),
[TradeBalance](https://docs.kraken.com/rest/#operation/getTradeBalance),
[OpenOrders](https://docs.kraken.com/rest/#operation/getOpenOrders),
[ClosedOrders](https://docs.kraken.com/rest/#operation/getClosedOrders),
[QueryOrders](https://docs.kraken.com/rest/#operation/getOrdersInfo),
[TradesHistory](https://docs.kraken.com/rest/#operation/getTradeHistory),
[QueryTrades](https://docs.kraken.com/rest/#operation/getTradesInfo),
[OpenPositions](https://docs.kraken.com/rest/#operation/getOpenPositions),
[Ledgers](https://docs.kraken.com/rest/#operation/getLedgers),
[QueryLedgers](https://docs.kraken.com/rest/#operation/getLedgersInfo),
[TradeVolume](https://docs.kraken.com/rest/#operation/getTradeVolume),
[AddExport](https://docs.kraken.com/rest/#operation/addExport),
[ExportStatus](https://docs.kraken.com/rest/#operation/exportStatus),
[RetrieveExport](https://docs.kraken.com/rest/#operation/retrieveExport),
[RemoveExport](https://docs.kraken.com/rest/#operation/removeExport).
  
*User Trading*  
[AddOrder](https://docs.kraken.com/rest/#operation/addOrder)
[CancelOrder](https://docs.kraken.com/rest/#operation/cancelOrder)
[CancellAll](https://docs.kraken.com/rest/#operation/cancelAllOrders)
[CancelAllOrdersAfter](https://docs.kraken.com/rest/#operation/cancelAllOrdersAfter).

*User Funding*  
[DepositMethods](https://docs.kraken.com/rest/#operation/getDepositMethods),
[DepositAddresses](https://docs.kraken.com/rest/#operation/getDepositAddresses),
[DepositStatus](https://docs.kraken.com/rest/#operation/getStatusRecentDeposits),
[WithdrawInfo](https://docs.kraken.com/rest/#operation/getWithdrawalInformation),
[Withdraw](https://docs.kraken.com/rest/#operation/withdrawFunds),
[WithdrawStatus](https://docs.kraken.com/rest/#operation/getStatusRecentWithdrawals),
[WithdrawCancel](https://docs.kraken.com/rest/#operation/cancelWithdrawal),
[WalletTransfer](https://docs.kraken.com/rest/#operation/walletTransfer).

*Websocket Auth*  
[GetWebSocketsToken](https://docs.kraken.com/rest/#operation/getWebsocketsToken).

# Example
```rust
use async_kraken::client::KrakenClient;

fn get_keys() -> (String, String) {
    let content = std::fs::read_to_string("key").expect("File not found");
    let lines: Vec<&str> = content.lines().collect();

    let key = String::from(lines[0]);
    let secret = String::from(lines[1]);

    (key, secret)
}

#[async_std::main]
async fn main() {
    // # Only public endpoints
    // let k = KrakenClient::new();

    // # Public and private enpoints
    let (key, secret) = get_keys();
    let k = KrakenClient::with_credentials(key, secret);

    match k.api_request("Time", serde_json::json!({})).await {
        Ok(json) => println!("{:?}", json),
        Err(e) => println!("{:?}", e),
    };

    match k.api_request("OHLC", serde_json::json!({"pair":"doteur", "interval":30, "since":0})).await
    {
        Ok(json) => println!("{:?}", json),
        Err(e) => println!("{:?}", e),
    };

    match k.api_request("Balance", serde_json::json!({})).await {
        Ok(json) => println!("{:?}", json),
        Err(e) => println!("{:?}", e),
    };
}
```
# Disclaimer
This software comes without any kind of warranties.  
You are the sole responsible of your gains or loses.