Class: BitexBot::ClosingFlow

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/bitex_bot/models/closing_flow.rb

Direct Known Subclasses

BuyClosingFlow, SellClosingFlow

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.close_open_positions ⇒ Object

Start a new CloseBuy that closes exising OpenBuy’s by selling on another exchange what was just bought on bitex.



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# File 'lib/bitex_bot/models/closing_flow.rb', line 7

def self.close_open_positions
  open_positions = open_position_class.open
  return if open_positions.empty?

  quantity = open_positions.collect(&:quantity).sum
  amount = open_positions.collect(&:amount).sum
  suggested_amount = open_positions.collect do |open|
    open.quantity * open.opening_flow.suggested_closing_price
  end.sum
  price = suggested_amount / quantity

  # Don't even bother trying to close a position that's too small.
  return if quantity * price < minimum_amount_for_closing

  flow = create!(
    desired_price: price,
    quantity: quantity,
    amount: amount,
    open_positions: open_positions)
  
  flow.create_initial_order_and_close_position
  
  return flow
end

.close_time_to_live ⇒ Object 



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# File 'lib/bitex_bot/models/closing_flow.rb', line 100

def self.close_time_to_live
  30
end

.minimum_amount_for_closing ⇒ Object

When placing a closing order we need to be aware of the smallest order amount permitted by the other exchange. If the other order is less than this USD amount then we do not attempt to close the positions yet.



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# File 'lib/bitex_bot/models/closing_flow.rb', line 96

def self.minimum_amount_for_closing
  5
end

Instance Method Details

#create_initial_order_and_close_position ⇒ Object 



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# File 'lib/bitex_bot/models/closing_flow.rb', line 32

def create_initial_order_and_close_position
  create_order_and_close_position(quantity, desired_price)
end

#create_order_and_close_position(quantity, price) ⇒ Object 



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# File 'lib/bitex_bot/models/closing_flow.rb', line 36

def create_order_and_close_position(quantity, price)
  order = BitexBot::Robot.taker.place_order(
    order_method, price.round(2), quantity.round(4))
  if order.nil? || order.id.nil?
    Robot.logger.error("Closing: Error on #{order_method} for "\
      "#{self.class.name} ##{id} #{quantity} BTC @ $#{price}."\
      "#{order.to_s}")
    return
  end
  Robot.logger.info("Closing: Going to #{order_method} ##{order.id} for"\
    "#{self.class.name} ##{id} #{quantity} BTC @ $#{price}")
  close_positions.create!(order_id: order.id)
end

#sync_closed_positions(orders, transactions) ⇒ Object 



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# File 'lib/bitex_bot/models/closing_flow.rb', line 50

def sync_closed_positions(orders, transactions)
  latest_close = close_positions.last

  # Maybe we couldn't create the bitstamp order when this flow
  # was created, so we try again when syncing.
  if latest_close.nil?
    create_initial_order_and_close_position
    return
  end

  order_id = latest_close.order_id.to_s
  order = orders.find{|x| x.id.to_s == order_id }

  # When ask is nil it means the other exchange is done executing it
  # so we can now have a look of all the sales that were spawned from it.
  if order.nil?
    latest_close.amount, latest_close.quantity =
      BitexBot::Robot.taker.amount_and_quantity(order_id, transactions)
    latest_close.save!
    
    next_price, next_quantity = get_next_price_and_quantity
    if (next_quantity * next_price) > self.class.minimum_amount_for_closing
      create_order_and_close_position(next_quantity, next_price)
    else
      self.btc_profit = get_btc_profit
      self.usd_profit = get_usd_profit
      self.done = true
      Robot.logger.info("Closing: Finished #{self.class.name} ##{id}"\
        "earned $#{self.usd_profit} and #{self.btc_profit} BTC. ")
      save!
    end
  elsif latest_close.created_at < self.class.close_time_to_live.seconds.ago
    Robot.with_cooldown do
      begin
        order.cancel!
      rescue StandardError => e
        nil # just pass, we'll keep on trying until it's not in orders anymore.
      end
    end
  end
end