Contract con_gamma_phi_lottery_v1
| Creator | ae9cfa894495930b8d2f1707ab936325b5c848ace677bb8ba41dfe7dcdb3e3e6 |
| Creation Hash | b32b3f85a810455b152f345fa57d7e52aa7a14b749a0bc06c22440f1a5433d98 |
| Created On | 897 days ago - 11/12/2021, 7:26:47 PM UTC+0 |
Contract Code
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import currency as tau
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import con_phi as phi
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phi_balances = ForeignHash(foreign_contract='con_phi', foreign_name='balances')
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owner = Variable()
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user_list = Variable()
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total = Variable()
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balances = Hash(default_value=0)
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random.seed()
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@construct
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def seed():
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user_list.set([])
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total.set(0)
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owner.set(ctx.caller)
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@export
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def deposit_phi(amount: int):
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# 1 PHI == 1 lottery ticket
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assert phi_balances[ctx.caller] >= amount, 'Insufficient funds!'
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users = set(user_list.get())
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users.add(ctx.caller)
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user_list.set(list(users))
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balances[ctx.caller] += amount
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total.set(total.get() + amount)
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phi.transfer_from(
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amount=amount,
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to=ctx.this,
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main_account=ctx.caller)
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@export
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def draw_winner():
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error = "Only the owner can draw a winner"
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assert owner.get() == ctx.caller, error
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total_tickets = total.get()
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assert total_tickets > 0, "There is nothing to draw!"
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lucky_number = random.randint(0, total_tickets-1)
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users = user_list.get()
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winner = None
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amount = 0
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for user in users:
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amount += balances[user]
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if lucky_number < amount:
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winner = user
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break
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assert winner is not None, 'Unable to draw a valid user'
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# Clear previous state
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for user in users:
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balances[user] = 0
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user_list.set([])
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total.set(0)
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# Send out prize
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phi.transfer(
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amount=total_tickets,
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to=winner)
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@export
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def change_ownership(new_owner: str):
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assert ctx.caller == owner.get(), 'Only the owner can change ownership!'
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owner.set(new_owner)
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@export
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def pay_out(amount: float):
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error = "Negative amount is not allowed"
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assert amount > 0, error
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error = "Only owner can payout tokens"
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assert ctx.caller == owner.get(), error
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# Transfer tokens from contract to owner
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phi.transfer(
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amount=amount,
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to=ctx.caller)
Byte Code
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