init push - laying out the project

portal/app/jobs/bet_placement_service.rb

@@ -0,0 +1,63 @@
+class BetPlacementService < ApplicationJob
+  queue_as :high
+
+  def perform(args = {})
+    # do not proceed if we have already procssed a bet for this tip
+    bet = args[:bet]
+    # get a valid betfair instance for the account we are using, halt if not valid.
+    exchange = Integrations::Betfair::BetManager.new(bet.exchange_account)
+    return unless exchange
+
+    last_step = 'Checking event id'
+    begin
+      # check this bet with the exchange and populate the event id if it is missing
+
+      unless bet.exchange_event_id
+        bet.exchange_event_id = exchange.bet_event(bet)
+      end
+      bet.placement_attempts += 1
+
+      # check the odds are still good at the exchange for that event
+      last_step = 'Checking odds'
+      prices_and_stakes = exchange.bet_odds(bet)
+      prices = prices_and_stakes[:prices]
+
+      bet.exchange_odds = prices_and_stakes
+      bet.outcome = 'expired'
+      tip_odds = bet.tip_provider_odds.to_f
+
+      # use tip odds or get closest match to tip odds offered by the exchange
+      last_step = 'Determining if odds optimal'
+      margin = tip_odds * bet.exchange_account.current_stake_strategy[:odds_margin]
+      max_tip_odds = tip_odds + margin
+      odds_to_execute_at = prices.min_by { |num| (max_tip_odds - num).abs }
+      raise 'Cannot determine optimal odds' unless odds_to_execute_at
+      if odds_to_execute_at.between?(tip_odds, tip_odds + margin)
+        last_step = 'Determining stake and placing bet'
+        odds_stake = prices_and_stakes[:stakes][odds_to_execute_at.to_s]
+
+        bet.executed_odds = odds_to_execute_at.to_s
+        # stake will always fill the max available or the limits of our stake management - whichever is the lower.
+        stake = bet.exchange_account.optimal_stake(bet, exchange.minimum_stake, odds_stake)
+
+        raise 'Optimal stake is zero. Not taking bet' if stake.zero?
+
+        bet.outcome = 'open'
+        bet.stake = stake
+        bet.expected_value = Bet.calculate_expected_value(stake, odds_to_execute_at)
+        if bet.exchange_account.can_bet?
+          bet.exchange_bet_id = exchange.place_bet(bet, stake)
+        end
+      else
+        bet.log << '[Bet placement] Tip odds not found in latest prices, nudge too far out'
+      end
+    rescue Exception => e
+      x = "Placement #{bet.placement_attempts}--->Last step: #{last_step}. Error: #{e.message}. Skipping"
+      bet.log ||= []
+      bet.log << x
+      bet.outcome = e.message.include?('PERMISSION_DENIED') ? 'errored' : 'skipped'
+    ensure
+      bet.save!
+    end
+  end
+end