Contract con_neb_key
| Creator | ae7d14d6d9b8443f881ba6244727b69b681010e782d4fe482dbfb0b6aca02d5d |
| Creation Hash | aac64db3e3dad2db2af112f3ab442a1b2c8bdf026731285b4465d2545b53043c |
| Created On | 950 days ago - 9/17/2021, 12:07:46 AM UTC+0 |
Contract Code
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# 888b 888 888 888 888 d8P 8888888888 Y88b d88P
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# 8888b 888 888 888 888 d8P 888 Y88b d88P
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# 88888b 888 888 888 888 d8P 888 Y88o88P
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# 888Y88b 888 .d88b. 88888b. 888 888 888 8888b. 888d88K 8888888 Y888P
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# 888 Y88b888 d8P Y8b 888 "88b 888 888 888 "88b 8888888b 888 888
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# 888 Y88888 88888888 888 888 888 888 888 .d888888 888 Y88b 888 888
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# 888 Y8888 Y8b. 888 d88P Y88b 888 888 888 888 888 Y88b 888 888
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# 888 Y888 "Y8888 88888P" "Y88888 888 "Y888888 888 Y88b 8888888888 888
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import con_nebula as neb
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staking = Hash(default_value='')
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balances = Hash(default_value=0)
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metadata = Hash()
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active = Variable()
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total_supply = Variable()
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stake_tax = Variable()
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stake_amount = Variable()
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stake_start_date = Variable()
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stake_start_period = Variable()
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stake_period = Variable()
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OPERATORS = [
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'ae7d14d6d9b8443f881ba6244727b69b681010e782d4fe482dbfb0b6aca02d5d',
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'e787ed5907742fa8d50b3ca2701ab8e03ec749ced806a15cdab800a127d7f863'
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]
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@construct
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def seed():
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metadata['token_name'] = "Nebula KEY"
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metadata['token_symbol'] = "KEY"
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metadata['operator'] = ctx.caller
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stake_tax.set(1)
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stake_amount.set(1_000_000)
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stake_start_date.set(now)
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stake_start_period.set(4)
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stake_period.set(21)
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active.set(False)
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total_supply.set(0)
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@export
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def change_metadata(key: str, value: Any):
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assert_owner()
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metadata[key] = value
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@export
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def transfer(amount: float, to: str):
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assert amount > 0, 'Cannot send negative balances!'
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assert balances[ctx.caller] >= amount, 'Not enough coins to send!'
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assert is_int(amount), 'Amount must be an Integer!'
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balances[ctx.caller] -= amount
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balances[to] += amount
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@export
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def approve(amount: float, to: str):
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assert amount > 0, 'Cannot send negative balances!'
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assert is_int(amount), 'Amount must be an Integer!'
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balances[ctx.caller, to] += amount
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@export
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def transfer_from(amount: float, to: str, main_account: str):
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assert amount > 0, 'Cannot send negative balances!'
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assert balances[main_account, ctx.caller] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'\
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.format(balances[main_account, ctx.caller], amount)
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assert balances[main_account] >= amount, 'Not enough coins to send!'
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assert is_int(amount), 'Amount must be an Integer!'
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balances[main_account, ctx.caller] -= amount
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balances[main_account] -= amount
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balances[to] += amount
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def is_int(amount: float):
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int_amount = int(amount)
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return int_amount == amount
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@export
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def stake():
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assert active.get() == True, 'Contract inactive!'
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assert staking[ctx.caller] == '', 'Address is already staking!'
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assert now < (stake_start_date.get() + datetime.timedelta(days=stake_start_period.get())), 'Staking start period ended!'
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neb.transfer_from(amount=stake_amount.get(), to=ctx.this, main_account=ctx.caller)
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staking[ctx.caller] = str(now)
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@export
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def unstake():
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assert active.get() == True, 'Contract inactive!'
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assert staking[ctx.caller] != '', 'Address is not staking!'
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total_stake_time = stake_start_period.get() + stake_period.get()
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if now < (stake_start_date.get() + datetime.timedelta(days=total_stake_time)):
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# Calculate early unstake tax and payout amount
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tax = int(stake_amount.get() / 100 * stake_tax.get())
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payout = stake_amount.get() - tax
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# Pay NEB back to user (minus tax for early unstake)
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neb.transfer(amount=payout, to=ctx.caller)
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# Retrieve vault contract
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vault = ForeignVariable(foreign_contract='con_nebula', foreign_name='vault_contract')
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# If no vault contract set, use internal vault
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if not vault.get():
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vault = Variable()
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vault.set('INTERNAL_NEB_VAULT')
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# Pay tax to vault
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neb.transfer(amount=tax, to=vault.get())
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# Reset staking date
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staking[ctx.caller] = ''
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return 'Unstaked early. No KEY token minted. Payed back {} NEB'.format(int(payout))
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else:
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# Pay NEB back to user
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neb.transfer(amount=stake_amount.get(), to=ctx.caller)
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# Mint KEY token for user
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balances[ctx.caller] += 1
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# Add newly minted KEY to total supply
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total_supply.set(total_supply.get() + 1)
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# Reset staking date
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staking[ctx.caller] = ''
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return 'Unstaked and minted 1 KEY token. Payed back {} NEB'.format(int(stake_amount.get()))
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@export
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def start():
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assert_owner()
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staking.clear()
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stake_start_date.set(now)
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@export
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def set_stake_start_period(days: int):
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assert_owner()
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stake_start_period.set(days)
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@export
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def set_stake_period(days: int):
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assert_owner()
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stake_period.set(days)
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@export
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def set_stake_amount(amount: float):
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assert_owner()
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assert amount > 0, 'Cannot set negative amount!'
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stake_amount.set(amount)
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@export
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def set_stake_tax(percent: float):
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assert_owner()
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assert percent > 0 and percent < 100, 'Wrong tax value!'
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stake_tax.set(percent)
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@export
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def time_until_unstake():
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assert staking[ctx.caller] != '', 'Address is not staking!'
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total_stake_time = stake_start_period.get() + stake_period.get()
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return (stake_start_date.get() - now) + datetime.timedelta(days=total_stake_time)
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@export
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def enable():
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assert_owner()
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active.set(True)
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@export
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def disable():
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assert_owner()
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active.set(False)
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@export
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def emergency_withdraw(amount: float):
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assert_owner()
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neb.transfer(amount, ctx.caller)
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@export
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def total_supply():
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return int(total_supply.get())
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def assert_owner():
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assert ctx.caller in OPERATORS, 'Only executable by operators!'
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Byte Code
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