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Latest 1 from a total of 1 transactions
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0x61060756 | 16513512 | 591 days ago | IN | 0 ETH | 0.00782854 |
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Contract Source Code Verified (Exact Match)
Contract Name:
Vyper_contract
Compiler Version
vyper:0.2.16
Contract Source Code (Vyper language format)
# @version 0.2.16 # Curve.Fi, 2021 # Distributed under MIT license interface Tricrypto: def virtual_price() -> uint256: view def price_oracle(k: uint256) -> uint256: view def A() -> uint256: view def gamma() -> uint256: view interface Chainlink: def latestAnswer() -> int256: view POOL: constant(address) = 0xD51a44d3FaE010294C616388b506AcdA1bfAAE46 BTC_FEED: constant(address) = 0xF4030086522a5bEEa4988F8cA5B36dbC97BeE88c ETH_FEED: constant(address) = 0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419 GAMMA0: constant(uint256) = 28000000000000 # 2.8e-5 A0: constant(uint256) = 2 * 3**3 * 10000 DISCOUNT0: constant(uint256) = 1087460000000000 # 0.00108.. @pure @internal def cubic_root(x: uint256) -> uint256: # x is taken at base 1e36 # result is at base 1e18 # Will have convergence problems when ETH*BTC is cheaper than 0.01 squared dollar # (for example, when BTC < $0.1 and ETH < $0.1) D: uint256 = x / 10**18 for i in range(255): diff: uint256 = 0 D_prev: uint256 = D D = D * (2 * 10**18 + x / D * 10**18 / D * 10**18 / D) / (3 * 10**18) if D > D_prev: diff = D - D_prev else: diff = D_prev - D if diff <= 1 or diff * 10**18 < D: return D raise "Did not converge" @external @view def lp_price() -> uint256: vp: uint256 = Tricrypto(POOL).virtual_price() p1: uint256 = convert(Chainlink(BTC_FEED).latestAnswer() * 10**10, uint256) p2: uint256 = convert(Chainlink(ETH_FEED).latestAnswer() * 10**10, uint256) max_price: uint256 = 3 * vp * self.cubic_root(p1 * p2) / 10**18 # ((A/A0) * (gamma/gamma0)**2) ** (1/3) g: uint256 = Tricrypto(POOL).gamma() * 10**18 / GAMMA0 a: uint256 = Tricrypto(POOL).A() * 10**18 / A0 discount: uint256 = max(g**2 / 10**18 * a, 10**34) # handle qbrt nonconvergence # if discount is small, we take an upper bound discount = self.cubic_root(discount) * DISCOUNT0 / 10**18 max_price -= max_price * discount / 10**18 return max_price
Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
[{"stateMutability":"view","type":"function","name":"lp_price","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":1049766}]
Contract Creation Code
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Deployed Bytecode
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