ERC-20
Overview
Max Total Supply
30.861096101628936178 BPT-rETH-ETH-gauge
Holders
11,458
Market
Price
$0.00 @ 0.000000 ETH
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
Balance
0 BPT-rETH-ETH-gaugeValue
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Minimal Proxy Contract for 0xc128468b7ce63ea702c1f104d55a2566b13d3abd
Contract Name:
Vyper_contract
Compiler Version
vyper:0.3.1
Contract Source Code (Vyper language format)
# @version 0.3.1 """ @title Rewards-Only Gauge @author Curve Finance @license MIT @notice Distribution of third-party rewards without CRV """ from vyper.interfaces import ERC20 implements: ERC20 struct RewardToken: distributor: address period_finish: uint256 rate: uint256 duration: uint256 received: uint256 paid: uint256 interface Streamer: def reward_data(_token: address) -> RewardToken: view def last_update_time() -> uint256: view interface ERC20Extended: def symbol() -> String[26]: view interface ERC1271: def isValidSignature(_hash: bytes32, _signature: Bytes[65]) -> bytes32: view event Deposit: provider: indexed(address) value: uint256 event Withdraw: provider: indexed(address) value: uint256 event Transfer: _from: indexed(address) _to: indexed(address) _value: uint256 event Approval: _owner: indexed(address) _spender: indexed(address) _value: uint256 struct Reward: token: address distributor: address period_finish: uint256 rate: uint256 last_update: uint256 integral: uint256 MAX_REWARDS: constant(uint256) = 8 CLAIM_FREQUENCY: constant(uint256) = 3600 # keccak256("isValidSignature(bytes32,bytes)")[:4] << 224 ERC1271_MAGIC_VAL: constant(bytes32) = 0x1626ba7e00000000000000000000000000000000000000000000000000000000 VERSION: constant(String[8]) = "v1.0.0" EIP712_TYPEHASH: constant(bytes32) = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)") PERMIT_TYPEHASH: constant(bytes32) = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)") BAL_TOKEN: immutable(address) BAL_VAULT: immutable(address) AUTHORIZER_ADAPTOR: immutable(address) lp_token: public(address) balanceOf: public(HashMap[address, uint256]) totalSupply: public(uint256) _allowance: HashMap[address, HashMap[address, uint256]] name: public(String[64]) symbol: public(String[40]) # ERC2612 DOMAIN_SEPARATOR: public(bytes32) nonces: public(HashMap[address, uint256]) # For tracking external rewards _reward_data: uint256 reward_tokens: public(address[MAX_REWARDS]) reward_balances: public(HashMap[address, uint256]) # claimant -> default reward receiver rewards_receiver: public(HashMap[address, address]) claim_sig: public(Bytes[4]) # reward token -> integral reward_integral: public(HashMap[address, uint256]) # reward token -> claiming address -> integral reward_integral_for: public(HashMap[address, HashMap[address, uint256]]) # user -> [uint128 claimable amount][uint128 claimed amount] claim_data: HashMap[address, HashMap[address, uint256]] @external def __init__(_bal_token: address, _vault: address, _authorizerAdaptor: address): """ @notice Contract constructor @param _vault Balancer Vault contract address """ BAL_TOKEN = _bal_token BAL_VAULT = _vault AUTHORIZER_ADAPTOR = _authorizerAdaptor # prevent initialization of implementation self.lp_token = 0x000000000000000000000000000000000000dEaD @view @external def decimals() -> uint256: """ @notice Get the number of decimals for this token @dev Implemented as a view method to reduce gas costs @return uint256 decimal places """ return 18 @view @external def version() -> String[8]: """ @notice Get the version of this gauge contract """ return VERSION @view @internal def _get_allowance(owner: address, spender: address) -> uint256: """ @dev Override to grant the Vault infinite allowance, causing for Gauge Tokens to not require approval. This is sound as the Vault already provides authorization mechanisms when initiating token transfers, which this contract inherits. """ if (spender == BAL_VAULT): return MAX_UINT256 return self._allowance[owner][spender] @internal def _checkpoint_rewards(_user: address, _total_supply: uint256, _claim: bool, _receiver: address): """ @notice Claim pending rewards and checkpoint rewards for a user """ # claim from reward contract reward_data: uint256 = self._reward_data if _total_supply != 0 and reward_data != 0 and block.timestamp > shift(reward_data, -160) + CLAIM_FREQUENCY: reward_contract: address = convert(reward_data % 2**160, address) raw_call(reward_contract, self.claim_sig) # dev: bad claim sig self._reward_data = convert(reward_contract, uint256) + shift(block.timestamp, 160) receiver: address = _receiver if _claim and receiver == ZERO_ADDRESS: # if receiver is not explicitly declared, check for default receiver receiver = self.rewards_receiver[_user] if receiver == ZERO_ADDRESS: # direct claims to user if no default receiver is set receiver = _user # calculate new user reward integral and transfer any owed rewards user_balance: uint256 = self.balanceOf[_user] for i in range(MAX_REWARDS): token: address = self.reward_tokens[i] if token == ZERO_ADDRESS: break dI: uint256 = 0 if _total_supply != 0: token_balance: uint256 = ERC20(token).balanceOf(self) dI = 10**18 * (token_balance - self.reward_balances[token]) / _total_supply self.reward_balances[token] = token_balance if _user == ZERO_ADDRESS: if dI != 0: self.reward_integral[token] += dI continue integral: uint256 = self.reward_integral[token] + dI if dI != 0: self.reward_integral[token] = integral integral_for: uint256 = self.reward_integral_for[token][_user] new_claimable: uint256 = 0 if integral_for < integral: self.reward_integral_for[token][_user] = integral new_claimable = user_balance * (integral - integral_for) / 10**18 claim_data: uint256 = self.claim_data[_user][token] total_claimable: uint256 = shift(claim_data, -128) + new_claimable if total_claimable > 0: total_claimed: uint256 = claim_data % 2 ** 128 if _claim: response: Bytes[32] = raw_call( token, concat( method_id("transfer(address,uint256)"), convert(receiver, bytes32), convert(total_claimable, bytes32), ), max_outsize=32, ) if len(response) != 0: assert convert(response, bool) self.reward_balances[token] -= total_claimable # update amount claimed (lower order bytes) self.claim_data[_user][token] = total_claimed + total_claimable elif new_claimable > 0: # update total_claimable (higher order bytes) self.claim_data[_user][token] = total_claimed + shift(total_claimable, 128) @view @external def reward_contract() -> address: """ @notice Address of the reward contract providing non-CRV incentives for this gauge @dev Returns `ZERO_ADDRESS` if there is no reward contract active """ return convert(self._reward_data % 2**160, address) @view @external def last_claim() -> uint256: """ @notice Epoch timestamp of the last call to claim from `reward_contract` @dev Rewards are claimed at most once per hour in order to reduce gas costs """ return shift(self._reward_data, -160) @view @external def claimed_reward(_addr: address, _token: address) -> uint256: """ @notice Get the number of already-claimed reward tokens for a user @param _addr Account to get reward amount for @param _token Token to get reward amount for @return uint256 Total amount of `_token` already claimed by `_addr` """ return self.claim_data[_addr][_token] % 2**128 @view @external def claimable_reward(_addr: address, _token: address) -> uint256: """ @notice Get the number of claimable reward tokens for a user @dev This call does not consider pending claimable amount in `reward_contract`. Off-chain callers should instead use `claimable_rewards_write` as a view method. @param _addr Account to get reward amount for @param _token Token to get reward amount for @return uint256 Claimable reward token amount """ return shift(self.claim_data[_addr][_token], -128) @view @external def reward_data(_token: address) -> Reward: reward_contract: address = convert(self._reward_data % 2**160, address) reward_token: RewardToken = Streamer(reward_contract).reward_data(_token) last_update_time: uint256 = Streamer(reward_contract).last_update_time() return Reward({ token: _token, distributor: reward_token.distributor, period_finish: reward_token.period_finish, rate: reward_token.rate, last_update: last_update_time, integral: self.reward_integral[_token] }) @external @nonreentrant('lock') def claimable_reward_write(_addr: address, _token: address) -> uint256: """ @notice Get the number of claimable reward tokens for a user @dev This function should be manually changed to "view" in the ABI Calling it via a transaction will claim available reward tokens @param _addr Account to get reward amount for @param _token Token to get reward amount for @return uint256 Claimable reward token amount """ if self.reward_tokens[0] != ZERO_ADDRESS: self._checkpoint_rewards(_addr, self.totalSupply, False, ZERO_ADDRESS) return shift(self.claim_data[_addr][_token], -128) @external def set_rewards_receiver(_receiver: address): """ @notice Set the default reward receiver for the caller. @dev When set to ZERO_ADDRESS, rewards are sent to the caller @param _receiver Receiver address for any rewards claimed via `claim_rewards` """ self.rewards_receiver[msg.sender] = _receiver @external @nonreentrant('lock') def claim_rewards(_addr: address = msg.sender, _receiver: address = ZERO_ADDRESS): """ @notice Claim available reward tokens for `_addr` @param _addr Address to claim for @param _receiver Address to transfer rewards to - if set to ZERO_ADDRESS, uses the default reward receiver for the caller """ if _receiver != ZERO_ADDRESS: assert _addr == msg.sender # dev: cannot redirect when claiming for another user self._checkpoint_rewards(_addr, self.totalSupply, True, _receiver) @external @nonreentrant('lock') def deposit(_value: uint256, _addr: address = msg.sender, _claim_rewards: bool = False): """ @notice Deposit `_value` LP tokens @dev Depositting also claims pending reward tokens @param _value Number of tokens to deposit @param _addr Address to deposit for """ if _value != 0: reward_contract: address = convert(self._reward_data % 2**160, address) total_supply: uint256 = self.totalSupply self._checkpoint_rewards(_addr, total_supply, _claim_rewards, ZERO_ADDRESS) total_supply += _value new_balance: uint256 = self.balanceOf[_addr] + _value self.balanceOf[_addr] = new_balance self.totalSupply = total_supply ERC20(self.lp_token).transferFrom(msg.sender, self, _value) log Deposit(_addr, _value) log Transfer(ZERO_ADDRESS, _addr, _value) @external @nonreentrant('lock') def withdraw(_value: uint256, _claim_rewards: bool = False): """ @notice Withdraw `_value` LP tokens @dev Withdrawing also claims pending reward tokens @param _value Number of tokens to withdraw """ if _value != 0: reward_contract: address = convert(self._reward_data % 2**160, address) total_supply: uint256 = self.totalSupply self._checkpoint_rewards(msg.sender, total_supply, _claim_rewards, ZERO_ADDRESS) total_supply -= _value new_balance: uint256 = self.balanceOf[msg.sender] - _value self.balanceOf[msg.sender] = new_balance self.totalSupply = total_supply ERC20(self.lp_token).transfer(msg.sender, _value) log Withdraw(msg.sender, _value) log Transfer(msg.sender, ZERO_ADDRESS, _value) @internal def _transfer(_from: address, _to: address, _value: uint256): reward_contract: address = convert(self._reward_data % 2**160, address) if _value != 0: total_supply: uint256 = self.totalSupply self._checkpoint_rewards(_from, total_supply, False, ZERO_ADDRESS) new_balance: uint256 = self.balanceOf[_from] - _value self.balanceOf[_from] = new_balance self._checkpoint_rewards(_to, total_supply, False, ZERO_ADDRESS) new_balance = self.balanceOf[_to] + _value self.balanceOf[_to] = new_balance log Transfer(_from, _to, _value) @external @nonreentrant('lock') def transfer(_to : address, _value : uint256) -> bool: """ @notice Transfer token for a specified address @dev Transferring claims pending reward tokens for the sender and receiver @param _to The address to transfer to. @param _value The amount to be transferred. """ self._transfer(msg.sender, _to, _value) return True @external @nonreentrant('lock') def transferFrom(_from : address, _to : address, _value : uint256) -> bool: """ @notice Transfer tokens from one address to another. @dev Transferring claims pending reward tokens for the sender and receiver @param _from address The address which you want to send tokens from @param _to address The address which you want to transfer to @param _value uint256 the amount of tokens to be transferred """ _allowance: uint256 = self._get_allowance(_from, msg.sender) if _allowance != MAX_UINT256: self._allowance[_from][msg.sender] = _allowance - _value self._transfer(_from, _to, _value) return True @view @external def allowance(owner: address, spender: address) -> uint256: """ @notice Get `spender`'s current allowance from `owner` """ return self._get_allowance(owner, spender) @external def approve(_spender : address, _value : uint256) -> bool: """ @notice Approve the passed address to transfer the specified amount of tokens on behalf of msg.sender @dev Beware that changing an allowance via this method brings the risk that someone may use both the old and new allowance by unfortunate transaction ordering. This may be mitigated with the use of {incraseAllowance} and {decreaseAllowance}. https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 @param _spender The address which will transfer the funds @param _value The amount of tokens that may be transferred @return bool success """ self._allowance[msg.sender][_spender] = _value log Approval(msg.sender, _spender, _value) return True @external def permit( _owner: address, _spender: address, _value: uint256, _deadline: uint256, _v: uint8, _r: bytes32, _s: bytes32 ) -> bool: """ @notice Approves spender by owner's signature to expend owner's tokens. See https://eips.ethereum.org/EIPS/eip-2612. @dev Inspired by https://github.com/yearn/yearn-vaults/blob/main/contracts/Vault.vy#L753-L793 @dev Supports smart contract wallets which implement ERC1271 https://eips.ethereum.org/EIPS/eip-1271 @param _owner The address which is a source of funds and has signed the Permit. @param _spender The address which is allowed to spend the funds. @param _value The amount of tokens to be spent. @param _deadline The timestamp after which the Permit is no longer valid. @param _v The bytes[64] of the valid secp256k1 signature of permit by owner @param _r The bytes[0:32] of the valid secp256k1 signature of permit by owner @param _s The bytes[32:64] of the valid secp256k1 signature of permit by owner @return True, if transaction completes successfully """ assert _owner != ZERO_ADDRESS assert block.timestamp <= _deadline nonce: uint256 = self.nonces[_owner] digest: bytes32 = keccak256( concat( b"\x19\x01", self.DOMAIN_SEPARATOR, keccak256(_abi_encode(PERMIT_TYPEHASH, _owner, _spender, _value, nonce, _deadline)) ) ) if _owner.is_contract: sig: Bytes[65] = concat(_abi_encode(_r, _s), slice(convert(_v, bytes32), 31, 1)) # reentrancy not a concern since this is a staticcall assert ERC1271(_owner).isValidSignature(digest, sig) == ERC1271_MAGIC_VAL else: assert ecrecover(digest, convert(_v, uint256), convert(_r, uint256), convert(_s, uint256)) == _owner self._allowance[_owner][_spender] = _value self.nonces[_owner] = nonce + 1 log Approval(_owner, _spender, _value) return True @external def increaseAllowance(_spender: address, _added_value: uint256) -> bool: """ @notice Increase the allowance granted to `_spender` by the caller @dev This is alternative to {approve} that can be used as a mitigation for the potential race condition @param _spender The address which will transfer the funds @param _added_value The amount of to increase the allowance @return bool success """ allowance: uint256 = self._get_allowance(msg.sender, _spender) + _added_value self._allowance[msg.sender][_spender] = allowance log Approval(msg.sender, _spender, allowance) return True @external def decreaseAllowance(_spender: address, _subtracted_value: uint256) -> bool: """ @notice Decrease the allowance granted to `_spender` by the caller @dev This is alternative to {approve} that can be used as a mitigation for the potential race condition @param _spender The address which will transfer the funds @param _subtracted_value The amount of to decrease the allowance @return bool success """ allowance: uint256 = self._get_allowance(msg.sender, _spender) - _subtracted_value self._allowance[msg.sender][_spender] = allowance log Approval(msg.sender, _spender, allowance) return True @internal def _set_rewards(_reward_contract: address, _claim_sig: bytes32, _reward_tokens: address[MAX_REWARDS]): """ @notice Set the active reward contract @dev A reward contract cannot be set while this contract has no deposits @param _reward_contract Reward contract address. Set to ZERO_ADDRESS to disable staking. @param _claim_sig Four byte selectors for staking, withdrawing and claiming, left padded with zero bytes. If the reward contract can be claimed from but does not require staking, the staking and withdraw selectors should be set to 0x00 @param _reward_tokens List of claimable reward tokens. New reward tokens may be added but they cannot be removed. When calling this function to unset or modify a reward contract, this array must begin with the already-set reward token addresses. """ lp_token: address = self.lp_token current_reward_contract: address = convert(self._reward_data % 2**160, address) total_supply: uint256 = self.totalSupply self._checkpoint_rewards(ZERO_ADDRESS, total_supply, False, ZERO_ADDRESS) if _reward_contract != ZERO_ADDRESS: assert _reward_tokens[0] != ZERO_ADDRESS # dev: no reward token assert _reward_contract.is_contract # dev: not a contract self._reward_data = convert(_reward_contract, uint256) self.claim_sig = slice(_claim_sig, 28, 4) for i in range(MAX_REWARDS): current_token: address = self.reward_tokens[i] new_token: address = _reward_tokens[i] if current_token != ZERO_ADDRESS: assert current_token == new_token # dev: cannot modify existing reward token elif new_token != ZERO_ADDRESS: self.reward_tokens[i] = new_token else: break if _reward_contract != ZERO_ADDRESS: # do an initial checkpoint to verify that claims are working self._checkpoint_rewards(ZERO_ADDRESS, total_supply, False, ZERO_ADDRESS) @external @nonreentrant('lock') def set_rewards(_reward_contract: address, _claim_sig: bytes32, _reward_tokens: address[MAX_REWARDS]): """ @notice Set the active reward contract @dev A reward contract cannot be set while this contract has no deposits @param _reward_contract Reward contract address. Set to ZERO_ADDRESS to disable staking. @param _claim_sig Four byte selectors for staking, withdrawing and claiming, left padded with zero bytes. If the reward contract can be claimed from but does not require staking, the staking and withdraw selectors should be set to 0x00 @param _reward_tokens List of claimable reward tokens. New reward tokens may be added but they cannot be removed. When calling this function to unset or modify a reward contract, this array must begin with the already-set reward token addresses. """ assert msg.sender == AUTHORIZER_ADAPTOR # dev: only owner self._set_rewards(_reward_contract, _claim_sig, _reward_tokens) # Initializer @external def initialize(_lp_token: address, _reward_contract: address, _claim_sig: bytes32): """ @notice Contract constructor @param _lp_token Liquidity Pool contract address """ assert self.lp_token == ZERO_ADDRESS assert _lp_token != ZERO_ADDRESS self.lp_token = _lp_token symbol: String[32] = ERC20Extended(_lp_token).symbol() name: String[64] = concat("Balancer ", symbol, " RewardGauge Deposit") self.name = name self.symbol = concat(symbol, "-gauge") self.DOMAIN_SEPARATOR = keccak256( _abi_encode(EIP712_TYPEHASH, keccak256(name), keccak256(VERSION), chain.id, self) ) # Initialise connection to ChildChainStreamer contract reward_tokens: address[MAX_REWARDS] = empty(address[MAX_REWARDS]) reward_tokens[0] = BAL_TOKEN self._set_rewards(_reward_contract, _claim_sig, reward_tokens)
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me":"_added_value","type":"uint256"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"decreaseAllowance","inputs":[{"name":"_spender","type":"address"},{"name":"_subtracted_value","type":"uint256"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"set_rewards","inputs":[{"name":"_reward_contract","type":"address"},{"name":"_claim_sig","type":"bytes32"},{"name":"_reward_tokens","type":"address[8]"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"initialize","inputs":[{"name":"_lp_token","type":"address"},{"name":"_reward_contract","type":"address"},{"name":"_claim_sig","type":"bytes32"}],"outputs":[]},{"stateMutability":"view","type":"function","name":"lp_token","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"balanceOf","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"totalSupply","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"name","inputs":[],"outputs":[{"name":"","type":"string"}]},{"stateMutability":"view","type":"function","name":"symbol","inputs":[],"outputs":[{"name":"","type":"string"}]},{"stateMutability":"view","type":"function","name":"DOMAIN_SEPARATOR","inputs":[],"outputs":[{"name":"","type":"bytes32"}]},{"stateMutability":"view","type":"function","name":"nonces","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"reward_tokens","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"reward_balances","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"rewards_receiver","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"claim_sig","inputs":[],"outputs":[{"name":"","type":"bytes"}]},{"stateMutability":"view","type":"function","name":"reward_integral","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"reward_integral_for","inputs":[{"name":"arg0","type":"address"},{"name":"arg1","type":"address"}],"outputs":[{"name":"","type":"uint256"}]}]
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