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Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
- Contract name:
- Vyper_contract
- Optimization enabled
- true
- Compiler version
- v0.3.7+commit.6020b8bb
- Verified at
- 2025-05-12T11:27:50.661133Z
Constructor Arguments
0x000000000000000000000000ecb456ea5365865ebab8a2661b0c503410e9b347000000000000000000000000853d955acef822db058eb8505911ed77f175b99e0000000000000000000000008e870d67f660d95d5be530380d0ec0bd388289e1000000000000000000000000fc2838a17d8e8b1d5456e0a351b0708a0921114700000000000000000000000000000000000000000000000000000000000003e800000000000000000000000000000000000000000000000000000000000f4240000000000000000000000000000000000000000000000000000000012a05f200
Vyper_contract.vy
# @version 0.3.7
"""
@title StableSwap
@author Curve.Fi
@license Copyright (c) Curve.Fi, 2020 - all rights reserved
@notice Optimized pool implementation with no lending, for 2 coins
with 18 decimals
"""
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(uint256) = 2
# fixed constants
FEE_DENOMINATOR: constant(uint256) = 10 ** 10
PRECISION: constant(uint256) = 10 ** 18 # The precision to convert to
A_PRECISION: constant(uint256) = 100
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)
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] != empty(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()
@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
@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.balances, 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(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(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(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(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(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 < convert(N_COINS, int128) # dev: j above N_COINS
# should be unreachable, but good for safety
assert i >= 0
assert i < convert(N_COINS, int128)
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 == convert(i, uint256):
_x = x
elif _i != convert(j, uint256):
_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.balances
x: uint256 = xp[i] + _dx
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
@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] = old_balances
x: uint256 = xp[i] + _dx
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
assert dy >= _min_dy, "Exchange resulted in fewer coins than expected"
dy_admin_fee: uint256 = dy_fee * self.admin_fee / FEE_DENOMINATOR
# 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(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(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(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 < convert(N_COINS, int128) # 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 != convert(i, uint256):
_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.balances
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 == convert(i, uint256):
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)
dy = dy - 1 # Withdraw less to account for rounding errors
dy_0: uint256 = xp[i] - new_y # 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
Compiler Settings
{"search_paths":["."],"outputSelection":{"Vyper_contract.vy":["abi","ast","interface","ir","userdoc","devdoc","evm.bytecode.object","evm.bytecode.opcodes","evm.deployedBytecode.object","evm.deployedBytecode.opcodes","evm.deployedBytecode.sourceMap","evm.methodIdentifiers"]}}
Contract ABI
[{"type":"event","name":"TokenExchange","inputs":[{"type":"address","name":"buyer","indexed":true},{"type":"int128","name":"sold_id","indexed":false},{"type":"uint256","name":"tokens_sold","indexed":false},{"type":"int128","name":"bought_id","indexed":false},{"type":"uint256","name":"tokens_bought","indexed":false}],"anonymous":false},{"type":"event","name":"AddLiquidity","inputs":[{"type":"address","name":"provider","indexed":true},{"type":"uint256[2]","name":"token_amounts","indexed":false},{"type":"uint256[2]","name":"fees","indexed":false},{"type":"uint256","name":"invariant","indexed":false},{"type":"uint256","name":"token_supply","indexed":false}],"anonymous":false},{"type":"event","name":"RemoveLiquidity","inputs":[{"type":"address","name":"provider","indexed":true},{"type":"uint256[2]","name":"token_amounts","indexed":false},{"type":"uint256[2]","name":"fees","indexed":false},{"type":"uint256","name":"token_supply","indexed":false}],"anonymous":false},{"type":"event","name":"RemoveLiquidityOne","inputs":[{"type":"address","name":"provider","indexed":true},{"type":"uint256","name":"token_amount","indexed":false},{"type":"uint256","name":"coin_amount","indexed":false},{"type":"uint256","name":"token_supply","indexed":false}],"anonymous":false},{"type":"event","name":"RemoveLiquidityImbalance","inputs":[{"type":"address","name":"provider","indexed":true},{"type":"uint256[2]","name":"token_amounts","indexed":false},{"type":"uint256[2]","name":"fees","indexed":false},{"type":"uint256","name":"invariant","indexed":false},{"type":"uint256","name":"token_supply","indexed":false}],"anonymous":false},{"type":"event","name":"CommitNewAdmin","inputs":[{"type":"uint256","name":"deadline","indexed":true},{"type":"address","name":"admin","indexed":true}],"anonymous":false},{"type":"event","name":"NewAdmin","inputs":[{"type":"address","name":"admin","indexed":true}],"anonymous":false},{"type":"event","name":"CommitNewFee","inputs":[{"type":"uint256","name":"deadline","indexed":true},{"type":"uint256","name":"fee","indexed":false},{"type":"uint256","name":"admin_fee","indexed":false}],"anonymous":false},{"type":"event","name":"NewFee","inputs":[{"type":"uint256","name":"fee","indexed":false},{"type":"uint256","name":"admin_fee","indexed":false}],"anonymous":false},{"type":"event","name":"RampA","inputs":[{"type":"uint256","name":"old_A","indexed":false},{"type":"uint256","name":"new_A","indexed":false},{"type":"uint256","name":"initial_time","indexed":false},{"type":"uint256","name":"future_time","indexed":false}],"anonymous":false},{"type":"event","name":"StopRampA","inputs":[{"type":"uint256","name":"A","indexed":false},{"type":"uint256","name":"t","indexed":false}],"anonymous":false},{"type":"constructor","stateMutability":"nonpayable","outputs":[],"inputs":[{"type":"address","name":"_owner"},{"type":"address[2]","name":"_coins"},{"type":"address","name":"_pool_token"},{"type":"uint256","name":"_A"},{"type":"uint256","name":"_fee"},{"type":"uint256","name":"_admin_fee"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"A","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"A_precise","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"get_virtual_price","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"calc_token_amount","inputs":[{"type":"uint256[2]","name":"_amounts"},{"type":"bool","name":"_is_deposit"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":""}],"name":"add_liquidity","inputs":[{"type":"uint256[2]","name":"_amounts"},{"type":"uint256","name":"_min_mint_amount"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"get_dy","inputs":[{"type":"int128","name":"i"},{"type":"int128","name":"j"},{"type":"uint256","name":"_dx"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":""}],"name":"exchange","inputs":[{"type":"int128","name":"i"},{"type":"int128","name":"j"},{"type":"uint256","name":"_dx"},{"type":"uint256","name":"_min_dy"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256[2]","name":""}],"name":"remove_liquidity","inputs":[{"type":"uint256","name":"_amount"},{"type":"uint256[2]","name":"_min_amounts"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":""}],"name":"remove_liquidity_imbalance","inputs":[{"type":"uint256[2]","name":"_amounts"},{"type":"uint256","name":"_max_burn_amount"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"calc_withdraw_one_coin","inputs":[{"type":"uint256","name":"_token_amount"},{"type":"int128","name":"i"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"uint256","name":""}],"name":"remove_liquidity_one_coin","inputs":[{"type":"uint256","name":"_token_amount"},{"type":"int128","name":"i"},{"type":"uint256","name":"_min_amount"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"ramp_A","inputs":[{"type":"uint256","name":"_future_A"},{"type":"uint256","name":"_future_time"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"stop_ramp_A","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"commit_new_fee","inputs":[{"type":"uint256","name":"_new_fee"},{"type":"uint256","name":"_new_admin_fee"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"apply_new_fee","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"revert_new_parameters","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"commit_transfer_ownership","inputs":[{"type":"address","name":"_owner"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"apply_transfer_ownership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"revert_transfer_ownership","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"admin_balances","inputs":[{"type":"uint256","name":"i"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdraw_admin_fees","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"donate_admin_fees","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"kill_me","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"unkill_me","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":""}],"name":"coins","inputs":[{"type":"uint256","name":"arg0"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"balances","inputs":[{"type":"uint256","name":"arg0"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"admin_fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":""}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":""}],"name":"lp_token","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"initial_A","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"future_A","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"initial_A_time","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"future_A_time","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"admin_actions_deadline","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"transfer_ownership_deadline","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"future_fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":""}],"name":"future_admin_fee","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":""}],"name":"future_owner","inputs":[]}]
Contract Creation Code
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