Class: CoinSync::Importers::KrakenAPI

Inherits:
Base
  • Object
show all
Includes:
CoinSync::Importers::Kraken::Common
Defined in:
lib/coinsync/importers/kraken_api.rb

Constant Summary collapse

BASE_URL = 
"https://api.kraken.com"
API_RENEWAL_INTERVAL = 
3.0

Instance Method Summary collapse

Methods included from CoinSync::Importers::Kraken::Common

#build_transaction_list

Methods inherited from Base

#can_build?, register_commands, register_importer, registered_commands

Constructor Details

#initialize(config, params = {}) ⇒ KrakenAPI

Returns a new instance of KrakenAPI.



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# File 'lib/coinsync/importers/kraken_api.rb', line 24

def initialize(config, params = {})
  super
  @api_key = params['api_key']
  @secret_api_key = params['private_key']
  @decoded_secret = Base64.decode64(@secret_api_key) if @secret_api_key
end

Instance Method Details

#can_import?(type) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/coinsync/importers/kraken_api.rb', line 31

def can_import?(type)
  @api_key && @secret_api_key && [:balances, :transactions].include?(type)
end

#import_balances ⇒ Object 



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# File 'lib/coinsync/importers/kraken_api.rb', line 81

def import_balances
  response = make_request('/0/private/Balance')

  case response
  when Net::HTTPSuccess
    json = JSON.parse(response.body)

    if !json['error'].empty? || !json['result']
      raise "Kraken importer: Invalid response: #{response.body}"
    end

    return json['result'].map { |k, v|
      [Kraken::LedgerEntry.parse_currency(k), BigDecimal.new(v)]
    }.select { |currency, amount|
      amount > 0 && currency.crypto?
    }.map { |currency, amount|
      Balance.new(currency, available: amount)
    }
  when Net::HTTPBadRequest
    raise "Kraken importer: Bad request: #{response.body}"
  else
    raise "Kraken importer: Bad response: #{response.body}"
  end
end

#import_transactions(filename) ⇒ Object 



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# File 'lib/coinsync/importers/kraken_api.rb', line 35

def import_transactions(filename)
  offset = 0
  entries = []
  slowdown = false

  loop do
    response = make_request('/0/private/Ledgers', ofs: offset)
    print slowdown ? '-' : '.'
    sleep(2 * API_RENEWAL_INTERVAL) if slowdown   # rate limiting

    case response
    when Net::HTTPSuccess
      json = JSON.parse(response.body)

      if json['result'].nil? || json['error'].length > 0
        if json['error'].first == 'EAPI:Rate limit exceeded'
          slowdown = true
          print '!'
          sleep(4 * API_RENEWAL_INTERVAL)
          next
        else
          raise "Kraken importer: Invalid response: #{response.body}"
        end
      end

      data = json['result']
      list = data && data['ledger']

      if !list
        raise "Kraken importer: No data returned: #{response.body}"
      end

      break if list.empty?

      entries.concat(list.values)
      offset += list.length
    when Net::HTTPBadRequest
      raise "Kraken importer: Bad request: #{response.body}"
    else
      raise "Kraken importer: Bad response: #{response.body}"
    end
  end

  File.write(filename, JSON.pretty_generate(entries) + "\n")
end

#read_transaction_list(source) ⇒ Object 



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# File 'lib/coinsync/importers/kraken_api.rb', line 106

def read_transaction_list(source)
  json = JSON.parse(source.read)

  build_transaction_list(json.map { |hash| Kraken::LedgerEntry.from_json(hash) })
end