def calculate_apy(gauge, swap):
crv_price = uniswap.price_router(crv, uniswap.usdc)
gauge_controller = interface.CurveGaugeController(gauge.controller())
working_supply = gauge.working_supply() / 1e18
relative_weight = gauge_controller.gauge_relative_weight(gauge) / 1e18
inflation_rate = gauge.inflation_rate() / 1e18
virtual_price = swap.get_virtual_price() / 1e18
base_price = 1
if str(swap) in constants.CURVE_BTC_SWAPS:
base_price *= uniswap.price_router(uniswap.wbtc, uniswap.usdc)
try:
rate = (inflation_rate * relative_weight * 86400 * 365 /
working_supply * 0.4) / (virtual_price * base_price)
except ZeroDivisionError:
rate = 0
return {
'crv price': crv_price,
'relative weight': relative_weight,
'inflation rate': inflation_rate,
'virtual price': virtual_price,
'base price': base_price,
'crv reward rate': rate,
'crv apy': rate * crv_price,
}
def get_base_price(pool):
coins = set(registry.get_underlying_coins(pool))
if coins & constants.BTC_LIKE:
return uniswap.price_router(uniswap.wbtc, uniswap.usdc)
elif coins & constants.ETH_LIKE:
return uniswap.price_router(uniswap.weth, uniswap.usdc)
else:
return 1
def calculate_apy(gauge, swap):
crv_price = uniswap.price_router(crv, uniswap.usdc)
results = fetch_multicall(
[gauge, "working_supply"],
[gauge_controller, "gauge_relative_weight", gauge],
[gauge, "inflation_rate"],
[swap, "get_virtual_price"],
)
results = [x / 1e18 for x in results]
working_supply, relative_weight, inflation_rate, virtual_price = results
base_price = get_base_price(swap)
try:
rate = (inflation_rate * relative_weight * 86400 * 365 /
working_supply * 0.4) / (virtual_price * base_price)
except ZeroDivisionError:
rate = 0
return {
"crv price": crv_price,
"relative weight": relative_weight,
"inflation rate": inflation_rate,
"virtual price": virtual_price,
"base price": base_price,
"crv reward rate": rate,
"crv apy": rate * crv_price,
"token price": base_price * virtual_price,
}
def describe_vault(vault: Vault):
info = {
"vault balance": vault.vault.balance() / vault.scale,
"share price": vault.vault.getPricePerFullShare() / 1e18,
"vault total": vault.vault.totalSupply() / vault.scale,
"strategy balance": vault.strategy.balanceOf() / vault.scale,
}
# some of the oldest vaults don't implement these methods
if hasattr(vault.vault, "available"):
info["available"] = vault.vault.available() / vault.scale
if hasattr(vault.vault, "min") and hasattr(vault.vault, "max"):
info["strategy buffer"] = vault.vault.min() / vault.vault.max()
# new curve voter proxy vaults
if hasattr(vault.strategy, "proxy"):
vote_proxy = interface.CurveYCRVVoter(vault.strategy.voter())
swap_func = {
"StrategyCurveGUSDProxy": "SWAP"
}.get(vault.strategy._name, "curve")
swap = interface.CurveSwap(getattr(vault.strategy, swap_func)())
gauge = interface.CurveGauge(vault.strategy.gauge())
info.update(curve.calculate_boost(gauge, vote_proxy))
info.update(curve.calculate_apy(gauge, swap))
info["earned"] = gauge.claimable_tokens.call(vote_proxy).to("ether")
if hasattr(vault.strategy, "earned"):
info["lifetime earned"] = vault.strategy.earned() / vault.scale
if vault.strategy._name == "StrategyYFIGovernance":
ygov = interface.YearnGovernance(vault.strategy.gov())
info["earned"] = ygov.earned(vault.strategy) / 1e18
info["reward rate"] = ygov.rewardRate() / 1e18
info["ygov balance"] = ygov.balanceOf(vault.strategy) / 1e18
info["ygov total"] = ygov.totalSupply() / 1e18
info["token price"] = uniswap.price_router(vault.token, uniswap.usdc)
return info
def calculate_apy(gauge, swap):
crv_price = uniswap.price_router(crv, uniswap.usdc)
gauge_controller = interface.CurveGaugeController(gauge.controller())
working_supply = gauge.working_supply() / 1e18
relative_weight = gauge_controller.gauge_relative_weight(gauge) / 1e18
inflation_rate = gauge.inflation_rate() / 1e18
virtual_price = swap.get_virtual_price() / 1e18
base_price = get_base_price(swap)
try:
rate = (inflation_rate * relative_weight * 86400 * 365 / working_supply * 0.4) / (virtual_price * base_price)
except ZeroDivisionError:
rate = 0
return {
"crv price": crv_price,
"relative weight": relative_weight,
"inflation rate": inflation_rate,
"virtual price": virtual_price,
"base price": base_price,
"crv reward rate": rate,
"crv apy": rate * crv_price,
"token price": base_price * virtual_price,
}