from otree.api import (
    models, widgets, BaseConstants, BaseSubsession, BaseGroup, BasePlayer,
    Currency as c, currency_range
)


author = 'Your name here'

doc = """
Your app description
"""


class Constants(BaseConstants):
    name_in_url = 'Main'
    players_per_group = None
    num_rounds = 1

    participation_fee = c(150)

class Subsession(BaseSubsession):
    pass


class Group(BaseGroup):
    pass


class Player(BasePlayer):
    def role(self):
        if self.id_in_group % 2 == 0:
            return 'Sender'
        else:
            return 'Receiver'