Contract con_pyusd_v2
| Creator | 6a9004cbc570592c21879e5ee319c754b9b7bf0278878b1cc21ac87eed0ee38d |
| Creation Hash | 76a61798a93b1561af26a516469a1f04a6785d35894883fa30932110cc42025a |
| Created On | 880 days ago - 12/6/2021, 10:12:15 AM UTC+0 |
Contract Code
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# v2_Final Python USD - Experimental Risky Lamden Fully Decentralized Stable Coin
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# Check collateralization TAU to PYUSD by using get_current_backing_ratio()
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# !!If its 1 everything is fine and > 1 its amazing and overcollateralized!!
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# You can exchange TAU to PYUSD and PYUSD to TAU at any point at the same ratio that LUSD-TAU is at using tau_to_pyusd() or pyusd_to_tau()
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# Dont forget to approve TAU to con_pyusd or tau_to_pyusd() exchange function doesnt work or just use the Swap dApp UI
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# Difference to LUSD is that PYUSD is collateralized by TAU on this chain instead of USDT
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# 2% protocol fee only on tau_to_pyusd() or pyusd_to_tau() - no extra fee on rocketswap but limited liq on rocketswap
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# Stablecoin Swap available at https://ipfs.io/ipfs/QmduzBgnsz2VftqmUaFDpWFW9Mw4ks8z6n5GEzMTG62hRB !!!
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import currency as tau
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import con_rocketswap_official_v1_1 as rocketswap
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balances = Hash(default_value=0)
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metadata = Hash()
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prices = ForeignHash(foreign_contract='con_rocketswap_official_v1_1', foreign_name='prices')
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dev_tax = Variable()
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liquidity_tax = Variable()
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dev_address = Variable()
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total_supply = Variable()
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@construct
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def seed():
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metadata['token_name'] = "Python USD"
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metadata['token_symbol'] = "PYUSD"
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metadata['operator'] = ctx.caller
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balances[ctx.caller] = 0
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dev_tax.set(1)
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dev_address.set('6a9004cbc570592c21879e5ee319c754b9b7bf0278878b1cc21ac87eed0ee38d')
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liquidity_tax.set(1)
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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 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 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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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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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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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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@export
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def tau_to_pyusd(amount: float):
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tau.transfer_from(amount=amount, to=ctx.this, main_account=ctx.caller)
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tax_amount = ((amount / prices["con_lusd_lst001"]) / 100 * (dev_tax.get() + liquidity_tax.get()))
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balances[ctx.caller] += ((amount / prices["con_lusd_lst001"]) - tax_amount)
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balances[dev_address.get()] += tax_amount / 2
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balances[ctx.this] += tax_amount / 2
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total_supply.set(total_supply.get() + (amount / prices["con_lusd_lst001"]))
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if(tax_amount/2 > 5):
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add_liquidity()
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@export
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def pyusd_to_tau(amount: float):
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tax_amount = (amount / 100 * (dev_tax.get() + liquidity_tax.get()))
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final_amount = amount - tax_amount
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balances[ctx.caller] -= amount
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balances[dev_address.get()] += tax_amount / 2
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balances[ctx.this] += tax_amount / 2
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total_supply.set(total_supply.get() - final_amount)
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tau.transfer(amount=final_amount*prices["con_lusd_lst001"], to=ctx.caller)
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if(tax_amount/2 > 5):
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add_liquidity()
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@export
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def get_current_backing_ratio():
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# > 1 = Good
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return ((tau.balance_of(ctx.this) * circulating_supply())/ prices["con_lusd_lst001"])
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def add_liquidity():
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token_amount = balances[ctx.this] / 2
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approve(amount=token_amount, to="con_rocketswap_official_v1_1")
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tau_amount = rocketswap.sell(contract="con_pyusd_v2", token_amount=token_amount)
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tau.approve(amount=tau_amount, to="con_rocketswap_official_v1_1")
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rocketswap.add_liquidity(contract="con_pyusd_v2", currency_amount=tau_amount)
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@export
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def circulating_supply():
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return (total_supply.get() - balances[ctx.this])
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@export
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def total_supply():
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return (total_supply.get())
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Byte Code
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