Class: Honeymaker::Exchanges::Kraken

Inherits:
Honeymaker::Exchange show all
Defined in:
lib/honeymaker/exchanges/kraken.rb

Constant Summary collapse

BASE_URL = 
"https://api.kraken.com"
ASSET_BLACKLIST = 
[
  "COPM" # has the same external_id (ecomi) as OMI
].freeze
ERROR_PATTERNS =

Patterns are unanchored (except regional_restriction) because the consumer may pass a sentence-joined error string. transient_nonce is matched first as it is the more specific/actionable case.

[
  {
    code: :regional_restriction,
    pattern: /\AEAccount:Invalid permissions:(?<asset>\S+) trading restricted for (?<country>\w+)\.?\z/
  },
  {
    code: :transient_nonce,
    pattern: /EAPI:Invalid nonce/
  },
  {
    code: :transient_unavailable,
    pattern: /EGeneral:Internal error|EService:(?:Unavailable|Busy|Deadline elapsed)/
  }
].freeze
REAL_COSTMIN = 
{
  "AUD" => 10,
  "CAD" => 5,
  "CHF" => 5,
  "DAI" => 5,
  "ETH" => 0.002,
  "EUR" => 0.5,
  "GBP" => 5,
  "JPY" => 500,
  "PYUSD" => 5,
  "RLUSD" => 5,
  "USD" => 5,
  "USDC" => 5,
  "USDQ" => 5,
  "USDR" => 5,
  "USDT" => 5,
  "XBT" => 0.00005
}.freeze

Constants inherited from Honeymaker::Exchange

Honeymaker::Exchange::OPTIONS

Instance Method Summary collapse

Methods inherited from Honeymaker::Exchange

#cache_ttl, #classify_error, #find_ticker, #get_price, #symbols, #tickers_info

Instance Method Details

#get_bid_ask(symbol) ⇒ Object 



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# File 'lib/honeymaker/exchanges/kraken.rb', line 80

def get_bid_ask(symbol)
  with_rescue do
    response = connection.get("/0/public/Ticker") do |req|
      req.params = { pair: symbol }
    end

    error = response.body["error"]
    raise StandardError, error.first if error.is_a?(Array) && error.any?

    _key, data = response.body["result"].first
    {
      bid: BigDecimal(data["b"][0]),
      ask: BigDecimal(data["a"][0])
    }
  end
end

#get_tickers_info ⇒ Object 



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# File 'lib/honeymaker/exchanges/kraken.rb', line 49

def get_tickers_info
  with_rescue do
    response = connection.get("/0/public/AssetPairs")

    error = response.body["error"]
    return Result::Failure.new(*error) if error.is_a?(Array) && error.any?

    response.body["result"].filter_map do |_, info|
      wsname = info["wsname"]
      next unless wsname && !wsname.empty?

      base, quote = wsname.split("/")

      {
        ticker: info["altname"],
        base: base,
        quote: quote,
        minimum_base_size: info["ordermin"],
        minimum_quote_size: (REAL_COSTMIN[quote] || info["costmin"] || 0).to_s,
        maximum_base_size: nil,
        maximum_quote_size: nil,
        base_decimals: info["lot_decimals"],
        quote_decimals: info["cost_decimals"],
        price_decimals: info["pair_decimals"],
        available: true,
        trading_enabled: info.key?("status") ? info["status"] == "online" : true
      }
    end
  end
end