def login():
if "user_id" in session:
return jsonify(
error("Already logged in with username " + session["user_id"]))
if request.checked_json["name"] in USERS:
return jsonify(
error("Username is already taken, please choose an other one"))
session["user_id"] = request.checked_json["name"]
USERS.add(request.checked_json["name"])
return jsonify({"status": "login succesful"})
def new_market():
name = request.checked_json["name"]
n_periods = request.checked_json["n_periods"]
period_time = request.checked_json["period_time"]
if not name.isalnum():
return jsonify(error("Market name must be alphanumeric without space"))
if name in MARKETS:
return jsonify(error("Market name already taken"))
market = Market(n_periods=n_periods, time_per_period=period_time)
market.start()
market.add_watch(emit_market_view(name, market))
MARKETS[name] = market
n_bots = max(0, min(10, request.checked_json["bots"]))
for name in BOT_NAMES[:n_bots]:
bot = Bot(name, market)
bot.start()
return jsonify({"market_id": name})
def set_price(market_id, side):
if side not in ("buy", "sell"):
return jsonify(error("side must be 'buy' or 'sell'"))
market = MARKETS.get(market_id)
user_id = session["user_id"]
market.set_price(user_id, Sides.BUY if side == "buy" else Sides.SELL,
request.checked_json["price"])
return jsonify({"status": "success"})
def set_open(market_id):
market = MARKETS.get(market_id)
user_id = session["user_id"]
participant = market.participants[user_id]
open_ = request.checked_json["open"]
if open_ and (participant.bid_price < 0 or participant.ask_price < 0):
return jsonify(error("bid and ask prices must be set before opening"))
market.set_open(user_id, open_)
return jsonify({"status": "success"})
def join_market(market_id):
user_id = session["user_id"]
market = MARKETS.get(market_id)
if user_id in market.participants:
return jsonify(error(f"User already in market, can only join once"))
hidden_value = market.join_market(user_id)
participants = view_participants(market)
return jsonify({
"market_values": market.values,
"hidden_value": hidden_value,
"participants": participants
})
def take_offer(market_id):
market = MARKETS.get(market_id)
user_id = session["user_id"]
participant = market.participants[user_id]
if not participant.open:
return jsonify(
error("must be open to offers to be able to take offers"))
counterparty_id, price, side = request.checked_json[
"counterparty_id"], request.checked_json[
"price"], request.checked_json["side"]
if counterparty_id not in market.participants:
return jsonify(error("counterparty is not in market"))
counterparty = market.participants[counterparty_id]
if not counterparty.open:
return jsonify(error("counterparty is closed to offers"))
counterparty_price = counterparty.bid_price if side == Sides.BUY else counterparty.ask_price
if counterparty_price != price:
return jsonify(error("counterparty price has changed"))
success = market.take_price(user_id, counterparty_id, side,
counterparty_price)
if not success:
return jsonify(
error("counterparty has closed to offers or changed price"))
return jsonify({"status": "success"})