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Vyper_contract

Vyper_contract

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The following smart contract code is not written in Solidity but in Vyper programming language. The code sets a boolean variable `is_killed` to `False`. The purpose of this code is not clear without the context of the entire contract.

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Vyper_contract Source Code
# @version 0.3.1 """ @title StableSwap @author Curve.Fi @license Copyright (c) Curve.Fi, 2020 - all rights reserved """ from vyper.interfaces import ERC20 interface CurveToken: def totalSupply() -> uint256: view def mint(_to: address, _value: uint256) -> bool: nonpayable def burnFrom(_to: address, _value: uint256) -> bool: nonpayable # Events event TokenExchange: buyer: indexed(address) sold_id: int128 tokens_sold: uint256 bought_id: int128 tokens_bought: uint256 event AddLiquidity: provider: indexed(address) token_amounts: uint256[N_COINS] fees: uint256[N_COINS] invariant: uint256 token_supply: uint256 event RemoveLiquidity: provider: indexed(address) token_amounts: uint256[N_COINS] fees: uint256[N_COINS] token_supply: uint256 event RemoveLiquidityOne: provider: indexed(address) token_amount: uint256 coin_amount: uint256 token_supply: uint256 event RemoveLiquidityImbalance: provider: indexed(address) token_amounts: uint256[N_COINS] fees: uint256[N_COINS] invariant: uint256 token_supply: uint256 event CommitNewAdmin: deadline: indexed(uint256) admin: indexed(address) event NewAdmin: admin: indexed(address) event CommitNewFee: deadline: indexed(uint256) fee: uint256 admin_fee: uint256 event NewFee: fee: uint256 admin_fee: uint256 event RampA: old_A: uint256 new_A: uint256 initial_time: uint256 future_time: uint256 event StopRampA: A: uint256 t: uint256 # These constants must be set prior to compiling N_COINS: constant(int128) = 2 PRECISION_MUL: constant(uint256[N_COINS]) = [1, 1000000000000] RATES: constant(uint256[N_COINS]) = [1000000000000000000, 1000000000000000000000000000000] # fixed constants FEE_DENOMINATOR: constant(uint256) = 10 ** 10 PRECISION: constant(uint256) = 10 ** 18 # The precision to convert to MAX_ADMIN_FEE: constant(uint256) = 10 * 10 ** 9 MAX_FEE: constant(uint256) = 5 * 10 ** 9 MAX_A: constant(uint256) = 10 ** 6 MAX_A_CHANGE: constant(uint256) = 10 ADMIN_ACTIONS_DELAY: constant(uint256) = 3 * 86400 MIN_RAMP_TIME: constant(uint256) = 86400 coins: public(address[N_COINS]) balances: public(uint256[N_COINS]) fee: public(uint256) # fee * 1e10 admin_fee: public(uint256) # admin_fee * 1e10 owner: public(address) lp_token: public(address) A_PRECISION: constant(uint256) = 100 initial_A: public(uint256) future_A: public(uint256) initial_A_time: public(uint256) future_A_time: public(uint256) admin_actions_deadline: public(uint256) transfer_ownership_deadline: public(uint256) future_fee: public(uint256) future_admin_fee: public(uint256) future_owner: public(address) is_killed: bool kill_deadline: uint256 KILL_DEADLINE_DT: constant(uint256) = 2 * 30 * 86400 @external def __init__( _owner: address, _coins: address[N_COINS], _pool_token: address, _A: uint256, _fee: uint256, _admin_fee: uint256 ): """ @notice Contract constructor @param _owner Contract owner address @param _coins Addresses of ERC20 conracts of coins @param _pool_token Address of the token representing LP share @param _A Amplification coefficient multiplied by n * (n - 1) @param _fee Fee to charge for exchanges @param _admin_fee Admin fee """ for i in range(N_COINS): assert _coins[i] != ZERO_ADDRESS self.coins = _coins self.initial_A = _A * A_PRECISION self.future_A = _A * A_PRECISION self.fee = _fee self.admin_fee = _admin_fee self.owner = _owner self.kill_deadline = block.timestamp + KILL_DEADLINE_DT self.lp_token = _pool_token @view @internal def _A() -> uint256: """ Handle ramping A up or down """ t1: uint256 = self.future_A_time A1: uint256 = self.future_A if block.timestamp < t1: A0: uint256 = self.initial_A t0: uint256 = self.initial_A_time # Expressions in uint256 cannot have negative numbers, thus "if" if A1 > A0: return A0 + (A1 - A0) * (block.timestamp - t0) / (t1 - t0) else: return A0 - (A0 - A1) * (block.timestamp - t0) / (t1 - t0) else: # when t1 == 0 or block.timestamp >= t1 return A1 @view @external def A() -> uint256: return self._A() / A_PRECISION @view @external def A_precise() -> uint256: return self._A() @view @internal def _xp() -> uint256[N_COINS]: result: uint256[N_COINS] = RATES for i in range(N_COINS): result[i] = result[i] * self.balances[i] / PRECISION return result @pure @internal def _xp_mem(_balances: uint256[N_COINS]) -> uint256[N_COINS]: result: uint256[N_COINS] = RATES for i in range(N_COINS): result[i] = result[i] * _balances[i] / PRECISION return result @pure @internal def _get_D(_xp: uint256[N_COINS], _amp: uint256) -> uint256: """ D invariant calculation in non-overflowing integer operations iteratively A * sum(x_i) * n**n + D = A * D * n**n + D**(n+1) / (n**n * prod(x_i)) Converging solution: D[j+1] = (A * n**n * sum(x_i) - D[j]**(n+1) / (n**n prod(x_i))) / (A * n**n - 1) """ S: uint256 = 0 Dprev: uint256 = 0 for _x in _xp: S += _x if S == 0: return 0 D: uint256 = S Ann: uint256 = _amp * N_COINS for _i in range(255): D_P: uint256 = D for _x in _xp: D_P = D_P * D / (_x * N_COINS) # If division by 0, this will be borked: only withdrawal will work. And that is good Dprev = D D = (Ann * S / A_PRECISION + D_P * N_COINS) * D / ((Ann - A_PRECISION) * D / A_PRECISION + (N_COINS + 1) * D_P) # Equality with the precision of 1 if D > Dprev: if D - Dprev <= 1: return D else: if Dprev - D <= 1: return D # convergence typically occurs in 4 rounds or less, this should be unreachable! # if it does happen the pool is borked and LPs can withdraw via `remove_liquidity` raise @view @internal def _get_D_mem(_balances: uint256[N_COINS], _amp: uint256) -> uint256: return self._get_D(self._xp_mem(_balances), _amp) @view @external def get_virtual_price() -> uint256: """ @notice The current virtual price of the pool LP token @dev Useful for calculating profits @return LP token virtual price normalized to 1e18 """ D: uint256 = self._get_D(self._xp(), self._A()) # D is in the units similar to DAI (e.g. converted to precision 1e18) # When balanced, D = n * x_u - total virtual value of the portfolio token_supply: uint256 = ERC20(self.lp_token).totalSupply() return D * PRECISION / token_supply @view @external def calc_token_amount(_amounts: uint256[N_COINS], _is_deposit: bool) -> uint256: """ @notice Calculate addition or reduction in token supply from a deposit or withdrawal @dev This calculation accounts for slippage, but not fees. Needed to prevent front-running, not for precise calculations! @param _amounts Amount of each coin being deposited @param _is_deposit set True for deposits, False for withdrawals @return Expected amount of LP tokens received """ amp: uint256 = self._A() balances: uint256[N_COINS] = self.balances D0: uint256 = self._get_D_mem(balances, amp) for i in range(N_COINS): if _is_deposit: balances[i] += _amounts[i] else: balances[i] -= _amounts[i] D1: uint256 = self._get_D_mem(balances, amp) token_amount: uint256 = CurveToken(self.lp_token).totalSupply() diff: uint256 = 0 if _is_deposit: diff = D1 - D0 else: diff = D0 - D1 return diff * token_amount / D0 @external @nonreentrant('lock') def add_liquidity(_amounts: uint256[N_COINS], _min_mint_amount: uint256) -> uint256: """ @notice Deposit coins into the pool @param _amounts List of amounts of coins to deposit @param _min_mint_amount Minimum amount of LP tokens to mint from the deposit @return Amount of LP tokens received by depositing """ assert not self.is_killed # dev: is killed amp: uint256 = self._A() old_balances: uint256[N_COINS] = self.balances # Initial invariant D0: uint256 = self._get_D_mem(old_balances, amp) lp_token: address = self.lp_token token_supply: uint256 = CurveToken(lp_token).totalSupply() new_balances: uint256[N_COINS] = old_balances for i in range(N_COINS): if token_supply == 0: assert _amounts[i] > 0 # dev: initial deposit requires all coins # balances store amounts of c-tokens new_balances[i] += _amounts[i] # Invariant after change D1: uint256 = self._get_D_mem(new_balances, amp) assert D1 > D0 # We need to recalculate the invariant accounting for fees # to calculate fair user's share D2: uint256 = D1 fees: uint256[N_COINS] = empty(uint256[N_COINS]) mint_amount: uint256 = 0 if token_supply > 0: # Only account for fees if we are not the first to deposit fee: uint256 = self.fee * N_COINS / (4 * (N_COINS - 1)) admin_fee: uint256 = self.admin_fee for i in range(N_COINS): ideal_balance: uint256 = D1 * old_balances[i] / D0 difference: uint256 = 0 new_balance: uint256 = new_balances[i] if ideal_balance > new_balance: difference = ideal_balance - new_balance else: difference = new_balance - ideal_balance fees[i] = fee * difference / FEE_DENOMINATOR self.balances[i] = new_balance - (fees[i] * admin_fee / FEE_DENOMINATOR) new_balances[i] -= fees[i] D2 = self._get_D_mem(new_balances, amp) mint_amount = token_supply * (D2 - D0) / D0 else: self.balances = new_balances mint_amount = D1 # Take the dust if there was any assert mint_amount >= _min_mint_amount, "Slippage screwed you" # Take coins from the sender for i in range(N_COINS): if _amounts[i] > 0: # "safeTransferFrom" which works for ERC20s which return bool or not _response: Bytes[32] = raw_call( self.coins[i], concat( method_id("transferFrom(address,address,uint256)"), convert(msg.sender, bytes32), convert(self, bytes32), convert(_amounts[i], bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) # dev: failed transfer # end "safeTransferFrom" # Mint pool tokens CurveToken(lp_token).mint(msg.sender, mint_amount) log AddLiquidity(msg.sender, _amounts, fees, D1, token_supply + mint_amount) return mint_amount @view @internal def _get_y(i: int128, j: int128, x: uint256, _xp: uint256[N_COINS]) -> uint256: """ Calculate x[j] if one makes x[i] = x Done by solving quadratic equation iteratively. x_1**2 + x_1 * (sum' - (A*n**n - 1) * D / (A * n**n)) = D ** (n + 1) / (n ** (2 * n) * prod' * A) x_1**2 + b*x_1 = c x_1 = (x_1**2 + c) / (2*x_1 + b) """ # x in the input is converted to the same price/precision assert i != j # dev: same coin assert j >= 0 # dev: j below zero assert j < N_COINS # dev: j above N_COINS # should be unreachable, but good for safety assert i >= 0 assert i < N_COINS A: uint256 = self._A() D: uint256 = self._get_D(_xp, A) Ann: uint256 = A * N_COINS c: uint256 = D S: uint256 = 0 _x: uint256 = 0 y_prev: uint256 = 0 for _i in range(N_COINS): if _i == i: _x = x elif _i != j: _x = _xp[_i] else: continue S += _x c = c * D / (_x * N_COINS) c = c * D * A_PRECISION / (Ann * N_COINS) b: uint256 = S + D * A_PRECISION / Ann # - D y: uint256 = D for _i in range(255): y_prev = y y = (y*y + c) / (2 * y + b - D) # Equality with the precision of 1 if y > y_prev: if y - y_prev <= 1: return y else: if y_prev - y <= 1: return y raise @view @external def get_dy(i: int128, j: int128, _dx: uint256) -> uint256: xp: uint256[N_COINS] = self._xp() rates: uint256[N_COINS] = RATES x: uint256 = xp[i] + (_dx * rates[i] / PRECISION) y: uint256 = self._get_y(i, j, x, xp) dy: uint256 = xp[j] - y - 1 fee: uint256 = self.fee * dy / FEE_DENOMINATOR return (dy - fee) * PRECISION / rates[j] @external @nonreentrant('lock') def exchange(i: int128, j: int128, _dx: uint256, _min_dy: uint256) -> uint256: """ @notice Perform an exchange between two coins @dev Index values can be found via the `coins` public getter method @param i Index value for the coin to send @param j Index valie of the coin to recieve @param _dx Amount of `i` being exchanged @param _min_dy Minimum amount of `j` to receive @return Actual amount of `j` received """ assert not self.is_killed # dev: is killed old_balances: uint256[N_COINS] = self.balances xp: uint256[N_COINS] = self._xp_mem(old_balances) rates: uint256[N_COINS] = RATES x: uint256 = xp[i] + _dx * rates[i] / PRECISION y: uint256 = self._get_y(i, j, x, xp) dy: uint256 = xp[j] - y - 1 # -1 just in case there were some rounding errors dy_fee: uint256 = dy * self.fee / FEE_DENOMINATOR # Convert all to real units dy = (dy - dy_fee) * PRECISION / rates[j] assert dy >= _min_dy, "Exchange resulted in fewer coins than expected" dy_admin_fee: uint256 = dy_fee * self.admin_fee / FEE_DENOMINATOR dy_admin_fee = dy_admin_fee * PRECISION / rates[j] # Change balances exactly in same way as we change actual ERC20 coin amounts self.balances[i] = old_balances[i] + _dx # When rounding errors happen, we undercharge admin fee in favor of LP self.balances[j] = old_balances[j] - dy - dy_admin_fee _response: Bytes[32] = raw_call( self.coins[i], concat( method_id("transferFrom(address,address,uint256)"), convert(msg.sender, bytes32), convert(self, bytes32), convert(_dx, bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) _response = raw_call( self.coins[j], concat( method_id("transfer(address,uint256)"), convert(msg.sender, bytes32), convert(dy, bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) log TokenExchange(msg.sender, i, _dx, j, dy) return dy @external @nonreentrant('lock') def remove_liquidity(_amount: uint256, _min_amounts: uint256[N_COINS]) -> uint256[N_COINS]: """ @notice Withdraw coins from the pool @dev Withdrawal amounts are based on current deposit ratios @param _amount Quantity of LP tokens to burn in the withdrawal @param _min_amounts Minimum amounts of underlying coins to receive @return List of amounts of coins that were withdrawn """ lp_token: address = self.lp_token total_supply: uint256 = CurveToken(lp_token).totalSupply() amounts: uint256[N_COINS] = empty(uint256[N_COINS]) for i in range(N_COINS): old_balance: uint256 = self.balances[i] value: uint256 = old_balance * _amount / total_supply assert value >= _min_amounts[i], "Withdrawal resulted in fewer coins than expected" self.balances[i] = old_balance - value amounts[i] = value _response: Bytes[32] = raw_call( self.coins[i], concat( method_id("transfer(address,uint256)"), convert(msg.sender, bytes32), convert(value, bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) CurveToken(lp_token).burnFrom(msg.sender, _amount) # dev: insufficient funds log RemoveLiquidity(msg.sender, amounts, empty(uint256[N_COINS]), total_supply - _amount) return amounts @external @nonreentrant('lock') def remove_liquidity_imbalance(_amounts: uint256[N_COINS], _max_burn_amount: uint256) -> uint256: """ @notice Withdraw coins from the pool in an imbalanced amount @param _amounts List of amounts of underlying coins to withdraw @param _max_burn_amount Maximum amount of LP token to burn in the withdrawal @return Actual amount of the LP token burned in the withdrawal """ assert not self.is_killed # dev: is killed amp: uint256 = self._A() old_balances: uint256[N_COINS] = self.balances D0: uint256 = self._get_D_mem(old_balances, amp) new_balances: uint256[N_COINS] = old_balances for i in range(N_COINS): new_balances[i] -= _amounts[i] D1: uint256 = self._get_D_mem(new_balances, amp) fee: uint256 = self.fee * N_COINS / (4 * (N_COINS - 1)) admin_fee: uint256 = self.admin_fee fees: uint256[N_COINS] = empty(uint256[N_COINS]) for i in range(N_COINS): new_balance: uint256 = new_balances[i] ideal_balance: uint256 = D1 * old_balances[i] / D0 difference: uint256 = 0 if ideal_balance > new_balance: difference = ideal_balance - new_balance else: difference = new_balance - ideal_balance fees[i] = fee * difference / FEE_DENOMINATOR self.balances[i] = new_balance - (fees[i] * admin_fee / FEE_DENOMINATOR) new_balances[i] = new_balance - fees[i] D2: uint256 = self._get_D_mem(new_balances, amp) lp_token: address = self.lp_token token_supply: uint256 = CurveToken(lp_token).totalSupply() token_amount: uint256 = (D0 - D2) * token_supply / D0 assert token_amount != 0 # dev: zero tokens burned token_amount += 1 # In case of rounding errors - make it unfavorable for the "attacker" assert token_amount <= _max_burn_amount, "Slippage screwed you" CurveToken(lp_token).burnFrom(msg.sender, token_amount) # dev: insufficient funds for i in range(N_COINS): if _amounts[i] != 0: _response: Bytes[32] = raw_call( self.coins[i], concat( method_id("transfer(address,uint256)"), convert(msg.sender, bytes32), convert(_amounts[i], bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) log RemoveLiquidityImbalance(msg.sender, _amounts, fees, D1, token_supply - token_amount) return token_amount @pure @internal def _get_y_D(A: uint256, i: int128, _xp: uint256[N_COINS], D: uint256) -> uint256: """ Calculate x[i] if one reduces D from being calculated for xp to D Done by solving quadratic equation iteratively. x_1**2 + x_1 * (sum' - (A*n**n - 1) * D / (A * n**n)) = D ** (n + 1) / (n ** (2 * n) * prod' * A) x_1**2 + b*x_1 = c x_1 = (x_1**2 + c) / (2*x_1 + b) """ # x in the input is converted to the same price/precision assert i >= 0 # dev: i below zero assert i < N_COINS # dev: i above N_COINS Ann: uint256 = A * N_COINS c: uint256 = D S: uint256 = 0 _x: uint256 = 0 y_prev: uint256 = 0 for _i in range(N_COINS): if _i != i: _x = _xp[_i] else: continue S += _x c = c * D / (_x * N_COINS) c = c * D * A_PRECISION / (Ann * N_COINS) b: uint256 = S + D * A_PRECISION / Ann y: uint256 = D for _i in range(255): y_prev = y y = (y*y + c) / (2 * y + b - D) # Equality with the precision of 1 if y > y_prev: if y - y_prev <= 1: return y else: if y_prev - y <= 1: return y raise @view @internal def _calc_withdraw_one_coin(_token_amount: uint256, i: int128) -> (uint256, uint256, uint256): # First, need to calculate # * Get current D # * Solve Eqn against y_i for D - _token_amount amp: uint256 = self._A() xp: uint256[N_COINS] = self._xp() D0: uint256 = self._get_D(xp, amp) total_supply: uint256 = CurveToken(self.lp_token).totalSupply() D1: uint256 = D0 - _token_amount * D0 / total_supply new_y: uint256 = self._get_y_D(amp, i, xp, D1) xp_reduced: uint256[N_COINS] = xp fee: uint256 = self.fee * N_COINS / (4 * (N_COINS - 1)) for j in range(N_COINS): dx_expected: uint256 = 0 if j == i: dx_expected = xp[j] * D1 / D0 - new_y else: dx_expected = xp[j] - xp[j] * D1 / D0 xp_reduced[j] -= fee * dx_expected / FEE_DENOMINATOR dy: uint256 = xp_reduced[i] - self._get_y_D(amp, i, xp_reduced, D1) precisions: uint256[N_COINS] = PRECISION_MUL dy = (dy - 1) / precisions[i] # Withdraw less to account for rounding errors dy_0: uint256 = (xp[i] - new_y) / precisions[i] # w/o fees return dy, dy_0 - dy, total_supply @view @external def calc_withdraw_one_coin(_token_amount: uint256, i: int128) -> uint256: """ @notice Calculate the amount received when withdrawing a single coin @param _token_amount Amount of LP tokens to burn in the withdrawal @param i Index value of the coin to withdraw @return Amount of coin received """ return self._calc_withdraw_one_coin(_token_amount, i)[0] @external @nonreentrant('lock') def remove_liquidity_one_coin(_token_amount: uint256, i: int128, _min_amount: uint256) -> uint256: """ @notice Withdraw a single coin from the pool @param _token_amount Amount of LP tokens to burn in the withdrawal @param i Index value of the coin to withdraw @param _min_amount Minimum amount of coin to receive @return Amount of coin received """ assert not self.is_killed # dev: is killed dy: uint256 = 0 dy_fee: uint256 = 0 total_supply: uint256 = 0 dy, dy_fee, total_supply = self._calc_withdraw_one_coin(_token_amount, i) assert dy >= _min_amount, "Not enough coins removed" self.balances[i] -= (dy + dy_fee * self.admin_fee / FEE_DENOMINATOR) CurveToken(self.lp_token).burnFrom(msg.sender, _token_amount) # dev: insufficient funds _response: Bytes[32] = raw_call( self.coins[i], concat( method_id("transfer(address,uint256)"), convert(msg.sender, bytes32), convert(dy, bytes32), ), max_outsize=32, ) if len(_response) > 0: assert convert(_response, bool) log RemoveLiquidityOne(msg.sender, _token_amount, dy, total_supply - _token_amount) return dy ### Admin functions ### @external def ramp_A(_future_A: uint256, _future_time: uint256): assert msg.sender == self.owner # dev: only owner assert block.timestamp >= self.initial_A_time + MIN_RAMP_TIME assert _future_time >= block.timestamp + MIN_RAMP_TIME # dev: insufficient time initial_A: uint256 = self._A() future_A_p: uint256 = _future_A * A_PRECISION assert _future_A > 0 and _future_A < MAX_A if future_A_p < initial_A: assert future_A_p * MAX_A_CHANGE >= initial_A else: assert future_A_p <= initial_A * MAX_A_CHANGE self.initial_A = initial_A self.future_A = future_A_p self.initial_A_time = block.timestamp self.future_A_time = _future_time log RampA(initial_A, future_A_p, block.timestamp, _future_time) @external def stop_ramp_A(): assert msg.sender == self.owner # dev: only owner current_A: uint256 = self._A() self.initial_A = current_A self.future_A = current_A self.initial_A_time = block.timestamp self.future_A_time = block.timestamp # now (block.timestamp < t1) is always False, so we return saved A log StopRampA(current_A, block.timestamp) @external def commit_new_fee(_new_fee: uint256, _new_admin_fee: uint256): assert msg.sender == self.owner # dev: only owner assert self.admin_actions_deadline == 0 # dev: active action assert _new_fee <= MAX_FEE # dev: fee exceeds maximum assert _new_admin_fee <= MAX_ADMIN_FEE # dev: admin fee exceeds maximum deadline: uint256 = block.timestamp + ADMIN_ACTIONS_DELAY self.admin_actions_deadline = deadline self.future_fee = _new_fee self.future_admin_fee = _new_admin_fee log CommitNewFee(deadline, _new_fee, _new_admin_fee) @external def apply_new_fee(): assert msg.sender == self.owner # dev: only owner assert block.timestamp >= self.admin_actions_deadline # dev: insufficient time assert self.admin_actions_deadline != 0 # dev: no active action self.admin_actions_deadline = 0 fee: uint256 = self.future_fee admin_fee: uint256 = self.future_admin_fee self.fee = fee self.admin_fee = admin_fee log NewFee(fee, admin_fee) @external def revert_new_parameters(): assert msg.sender == self.owner # dev: only owner self.admin_actions_deadline = 0 @external def commit_transfer_ownership(_owner: address): assert msg.sender == self.owner # dev: only owner assert self.transfer_ownership_deadline == 0 # dev: active transfer deadline: uint256 = block.timestamp + ADMIN_ACTIONS_DELAY self.transfer_ownership_deadline = deadline self.future_owner = _owner log CommitNewAdmin(deadline, _owner) @external def apply_transfer_ownership(): assert msg.sender == self.owner # dev: only owner assert block.timestamp >= self.transfer_ownership_deadline # dev: insufficient time assert self.transfer_ownership_deadline != 0 # dev: no active transfer self.transfer_ownership_deadline = 0 owner: address = self.future_owner self.owner = owner log NewAdmin(owner) @external def revert_transfer_ownership(): assert msg.sender == self.owner # dev: only owner self.transfer_ownership_deadline = 0 @view @external def admin_balances(i: uint256) -> uint256: return ERC20(self.coins[i]).balanceOf(self) - self.balances[i] @external def withdraw_admin_fees(): assert msg.sender == self.owner # dev: only owner for i in range(N_COINS): coin: address = self.coins[i] value: uint256 = ERC20(coin).balanceOf(self) - self.balances[i] if value > 0: _response: Bytes[32] = raw_call( coin, concat( method_id("transfer(address,uint256)"), convert(msg.sender, bytes32), convert(value, bytes32), ), max_outsize=32, ) # dev: failed transfer if len(_response) > 0: assert convert(_response, bool) @external def donate_admin_fees(): assert msg.sender == self.owner # dev: only owner for i in range(N_COINS): self.balances[i] = ERC20(self.coins[i]).balanceOf(self) @external def kill_me(): assert msg.sender == self.owner # dev: only owner assert self.kill_deadline > block.timestamp # dev: deadline has passed self.is_killed = True @external def unkill_me(): assert msg.sender == self.owner # dev: only owner self.is_killed = False
Vyper_contract ABI
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[{"name":"TokenExchange","inputs":[{"name":"buyer","type":"address","indexed":true},{"name":"sold_id","type":"int128","indexed":false},{"name":"tokens_sold","type":"uint256","indexed":false},{"name":"bought_id","type":"int128","indexed":false},{"name":"tokens_bought","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"AddLiquidity","inputs":[{"name":"provider","type":"address","indexed":true},{"name":"token_amounts","type":"uint256[2]","indexed":false},{"name":"fees","type":"uint256[2]","indexed":false},{"name":"invariant","type":"uint256","indexed":false},{"name":"token_supply","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"RemoveLiquidity","inputs":[{"name":"provider","type":"address","indexed":true},{"name":"token_amounts","type":"uint256[2]","indexed":false},{"name":"fees","type":"uint256[2]","indexed":false},{"name":"token_supply","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"RemoveLiquidityOne","inputs":[{"name":"provider","type":"address","indexed":true},{"name":"token_amount","type":"uint256","indexed":false},{"name":"coin_amount","type":"uint256","indexed":false},{"name":"token_supply","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"RemoveLiquidityImbalance","inputs":[{"name":"provider","type":"address","indexed":true},{"name":"token_amounts","type":"uint256[2]","indexed":false},{"name":"fees","type":"uint256[2]","indexed":false},{"name":"invariant","type":"uint256","indexed":false},{"name":"token_supply","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"CommitNewAdmin","inputs":[{"name":"deadline","type":"uint256","indexed":true},{"name":"admin","type":"address","indexed":true}],"anonymous":false,"type":"event"},{"name":"NewAdmin","inputs":[{"name":"admin","type":"address","indexed":true}],"anonymous":false,"type":"event"},{"name":"CommitNewFee","inputs":[{"name":"deadline","type":"uint256","indexed":true},{"name":"fee","type":"uint256","indexed":false},{"name":"admin_fee","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"NewFee","inputs":[{"name":"fee","type":"uint256","indexed":false},{"name":"admin_fee","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"RampA","inputs":[{"name":"old_A","type":"uint256","indexed":false},{"name":"new_A","type":"uint256","indexed":false},{"name":"initial_time","type":"uint256","indexed":false},{"name":"future_time","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"StopRampA","inputs":[{"name":"A","type":"uint256","indexed":false},{"name":"t","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"stateMutability":"nonpayable","type":"constructor","inputs":[{"name":"_owner","type":"address"},{"name":"_coins","type":"address[2]"},{"name":"_pool_token","type":"address"},{"name":"_A","type":"uint256"},{"name":"_fee","type":"uint256"},{"name":"_admin_fee","type":"uint256"}],"outputs":[]},{"stateMutability":"view","type":"function","name":"A","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":10058},{"stateMutability":"view","type":"function","name":"A_precise","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":10058},{"stateMutability":"view","type":"function","name":"get_virtual_price","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":804988},{"stateMutability":"view","type":"function","name":"calc_token_amount","inputs":[{"name":"_amounts","type":"uint256[2]"},{"name":"_is_deposit","type":"bool"}],"outputs":[{"name":"","type":"uint256"}],"gas":1593467},{"stateMutability":"nonpayable","type":"function","name":"add_liquidity","inputs":[{"name":"_amounts","type":"uint256[2]"},{"name":"_min_mint_amount","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":2546841},{"stateMutability":"view","type":"function","name":"get_dy","inputs":[{"name":"i","type":"int128"},{"name":"j","type":"int128"},{"name":"_dx","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":1149036},{"stateMutability":"nonpayable","type":"function","name":"exchange","inputs":[{"name":"i","type":"int128"},{"name":"j","type":"int128"},{"name":"_dx","type":"uint256"},{"name":"_min_dy","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":1307513},{"stateMutability":"nonpayable","type":"function","name":"remove_liquidity","inputs":[{"name":"_amount","type":"uint256"},{"name":"_min_amounts","type":"uint256[2]"}],"outputs":[{"name":"","type":"uint256[2]"}],"gas":169716},{"stateMutability":"nonpayable","type":"function","name":"remove_liquidity_imbalance","inputs":[{"name":"_amounts","type":"uint256[2]"},{"name":"_max_burn_amount","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":2546560},{"stateMutability":"view","type":"function","name":"calc_withdraw_one_coin","inputs":[{"name":"_token_amount","type":"uint256"},{"name":"i","type":"int128"}],"outputs":[{"name":"","type":"uint256"}],"gas":989},{"stateMutability":"nonpayable","type":"function","name":"remove_liquidity_one_coin","inputs":[{"name":"_token_amount","type":"uint256"},{"name":"i","type":"int128"},{"name":"_min_amount","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":1620521},{"stateMutability":"nonpayable","type":"function","name":"ramp_A","inputs":[{"name":"_future_A","type":"uint256"},{"name":"_future_time","type":"uint256"}],"outputs":[],"gas":158394},{"stateMutability":"nonpayable","type":"function","name":"stop_ramp_A","inputs":[],"outputs":[],"gas":154617},{"stateMutability":"nonpayable","type":"function","name":"commit_new_fee","inputs":[{"name":"_new_fee","type":"uint256"},{"name":"_new_admin_fee","type":"uint256"}],"outputs":[],"gas":113298},{"stateMutability":"nonpayable","type":"function","name":"apply_new_fee","inputs":[],"outputs":[],"gas":103621},{"stateMutability":"nonpayable","type":"function","name":"revert_new_parameters","inputs":[],"outputs":[],"gas":22901},{"stateMutability":"nonpayable","type":"function","name":"commit_transfer_ownership","inputs":[{"name":"_owner","type":"address"}],"outputs":[],"gas":78536},{"stateMutability":"nonpayable","type":"function","name":"apply_transfer_ownership","inputs":[],"outputs":[],"gas":66804},{"stateMutability":"nonpayable","type":"function","name":"revert_transfer_ownership","inputs":[],"outputs":[],"gas":22991},{"stateMutability":"view","type":"function","name":"admin_balances","inputs":[{"name":"i","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":7769},{"stateMutability":"nonpayable","type":"function","name":"withdraw_admin_fees","inputs":[],"outputs":[],"gas":31496},{"stateMutability":"nonpayable","type":"function","name":"donate_admin_fees","inputs":[],"outputs":[],"gas":82442},{"stateMutability":"nonpayable","type":"function","name":"kill_me","inputs":[],"outputs":[],"gas":40304},{"stateMutability":"nonpayable","type":"function","name":"unkill_me","inputs":[],"outputs":[],"gas":23141},{"stateMutability":"view","type":"function","name":"coins","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"address"}],"gas":3225},{"stateMutability":"view","type":"function","name":"balances","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}],"gas":3255},{"stateMutability":"view","type":"function","name":"fee","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3240},{"stateMutability":"view","type":"function","name":"admin_fee","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3270},{"stateMutability":"view","type":"function","name":"owner","inputs":[],"outputs":[{"name":"","type":"address"}],"gas":3300},{"stateMutability":"view","type":"function","name":"lp_token","inputs":[],"outputs":[{"name":"","type":"address"}],"gas":3330},{"stateMutability":"view","type":"function","name":"initial_A","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3360},{"stateMutability":"view","type":"function","name":"future_A","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3390},{"stateMutability":"view","type":"function","name":"initial_A_time","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3420},{"stateMutability":"view","type":"function","name":"future_A_time","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3450},{"stateMutability":"view","type":"function","name":"admin_actions_deadline","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3480},{"stateMutability":"view","type":"function","name":"transfer_ownership_deadline","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3510},{"stateMutability":"view","type":"function","name":"future_fee","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3540},{"stateMutability":"view","type":"function","name":"future_admin_fee","inputs":[],"outputs":[{"name":"","type":"uint256"}],"gas":3570},{"stateMutability":"view","type":"function","name":"future_owner","inputs":[],"outputs":[{"name":"","type":"address"}],"gas":3600}]
Vyper_contract Bytecode
Copied
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    SHILAINU

    Verified

    The following smart contract is the SHILAINU token contract, which is an ERC20 token with a total supply of 1 trillion. It includes features such as transaction limits, fees, and automatic liquidity provision. The contract also has a blacklist mode and the ability to set fee and transaction exemptions for specific addresses. The purpose of the contract is to provide a decentralized currency for the Shiba Inu community.

    0x20c3fa331a385b63ee39137e99d0cf2db142fce1
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    • Verified
    • Fungible Token
    • ERC20
    Ethereum  logo

    Token

    Verified

    The following smart contract is a token contract that implements the ERC20 standard. It includes features such as a fee system, wallet and transaction limits, and liquidity provision. The contract also allows for the destruction of tokens through a fee system. The contract is designed to be used with the Uniswap decentralized exchange.

    0xd015422879a1308ba557510345e944b912b9ab73
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    Ethereum  logo

    OptimizedTransparentUpgradeableProxy

    Verified

    This contract is a proxy and the implementation details are not yet known.

    0x644192291cc835a93d6330b24ea5f5fedd0eef9e
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    • Verified
    • Proxy
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