Contract con_rubix_test_stake
| Creator | fb8721c4f736b22075f08f1161f24522132522311ac4f1e19730e3298bb8a40e |
| Creation Hash | 241c1474c3b1bdc9710142e0a2487dfae5e7c60e8f47561081ad98c33d2f3cb6 |
| Created On | 896 days ago - 11/13/2021, 1:44:39 AM UTC+0 |
Contract Code
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tad_contract = importlib.import_module('con_rubix_test_tad')
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vault_contract = importlib.import_module('con_rubix_test_vault')
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rate = Hash()
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balances = Hash(default_value=0)
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metadata = Hash()
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total_minted = Variable()
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operator = Variable()
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# 31536000 seconds per year
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@construct
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def seed():
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operator.set(ctx.caller)
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rate['start_time'] = get_timestamp()
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rate['rate'] = 1.0000000015469297 # interest per second
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rate['start_price'] = 1
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metadata['token_name'] = 'Staked tad'
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metadata['token_symbol'] = 'stad'
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metadata['token_logo_url'] = 'image.site'
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metadata['operator'] = ctx.caller
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total_minted.set(0)
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@export
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def get_timestamp():
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# https://developers.lamden.io/docs/smart-contracts/datetime-module/
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td = now - datetime.datetime(1970, 1, 1, 0, 0, 0)
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return td.seconds
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@export
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def stake(amount: float):
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assert amount > 0, 'Stake amount must be positive!'
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tad_contract.transfer_from(
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to=ctx.this, amount=amount, main_account=ctx.caller)
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amount_minted = amount / get_price()
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total = total_minted.get() + amount_minted
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total_minted.set(total)
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balances[ctx.caller] += amount_minted
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return amount_minted
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@export
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def withdraw_stake(amount: float):
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assert amount > 0, 'Stake amount must be positive!'
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assert balances[ctx.caller] >= amount, 'Not enough coins to withdraw!'
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balances[ctx.caller] -= amount
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current_price = get_price()
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return_amount = current_price * amount
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supply = total_minted.get()
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current_average = supply / tad_contract.balance_of(ctx.this)
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transfer_away_amount = amount * current_average
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total_minted.set(supply - amount)
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if return_amount - transfer_away_amount > 0:
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# todo: double check in future
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vault_contract.mint_rewards(
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amount=return_amount - transfer_away_amount)
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tad_contract.transfer(amount=return_amount, to=ctx.caller)
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return return_amount
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@export
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def change_rate(new_rate: float): # takes yearly interest as decimal
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assert_owner()
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assert new_rate >= 0, 'Cannot have negative staking!'
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current_price = get_price()
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rate['start_time'] = get_timestamp()
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rate['rate'] = new_rate # interest per second
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rate['start_price'] = current_price
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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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sender = ctx.caller
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assert balances[sender] >= amount, 'Not enough coins to send!'
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balances[sender] -= amount
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balances[to] += amount
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@export
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def balance_of(account: str):
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return balances[account]
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@export
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def allowance(owner: str, spender: str):
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return balances[owner, spender]
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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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sender = ctx.caller
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assert balances[sender] >= amount, 'Cannot approve balance that exceeds total balance!'
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balances[sender, to] += amount
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return balances[sender, to]
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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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sender = ctx.caller
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assert balances[main_account] >= amount, 'Not enough coins to send!'
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assert balances[main_account, sender] >= amount, 'Not enough coins approved to send! You have {} and are trying to spend {}'\
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.format(balances[main_account, sender], amount)
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balances[main_account, sender] -= amount
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balances[main_account] -= amount
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balances[to] += amount
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@export
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def get_price():
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return rate['start_price'] * rate['rate'] ** (
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get_timestamp() - rate['start_time'])
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@export
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def change_metadata(key: str, value: Any):
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assert ctx.caller == metadata['operator'], 'Only operator can set metadata!'
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metadata[key] = value
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@export
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def change_owner(new_owner: str):
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assert_owner()
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operator.set(new_owner)
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def assert_owner():
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assert ctx.caller == operator.get(), 'Only operator can call!'
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Byte Code
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