Contract 0x210ABdFD989f3eE5C08614a8f4e096Cf8408f5DF 9

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x8f5369948c25103c99fa999b982853b93ec4bdbf73709b5edca1c56059d097f5Deposit325202542024-02-18 23:15:503 days 23 hrs ago0xd2507077267be657ea6f9ef593c4a797338b8d0a IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0006060546
0xa81dce9216c54ddde492c12fab55eb0b92a99fd5236569b9029ec2206911b8ecWithdraw325139862024-02-18 14:00:354 days 8 hrs ago0x71db4acb731236ba67482bee3268a80b9cff2943 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000509538876
0xf14122ab162f51962aaadd7f79e9e16064c5d65c15fc50f079267fa92aa3d599Deposit325115862024-02-18 10:28:204 days 11 hrs ago0x35a32d2ff907347151d3fc79588057b22b7abea4 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000220488001
0xc7b3b7226e10b4d7119670087d0d61424797bf99babdeac34285c6c7d17cf336Withdraw325104202024-02-18 8:43:454 days 13 hrs ago0x429e87d99c82b0b863629f9b3447679a129c80b0 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0007635754
0x710803ddf0fe4c088112b3b57eacd2d9d4667b30e79c0955fe3d536cd66b0abeDeposit325018402024-02-17 20:03:005 days 2 hrs ago0xdd7b2f2b821ff20ee52a8787b3d9614b91a2b8b1 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000806899904
0xf49c490e60de7c19da3449f7184efe287dcceb15f2374e6dcdbad4bf9930ff00Deposit324986392024-02-17 15:18:355 days 6 hrs ago0x71db4acb731236ba67482bee3268a80b9cff2943 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.005025174875
0x5b73f22c3ec578974140d837f97f45a0a3801a91992074f6e95d7d8a516683bdDeposit324976832024-02-17 13:55:055 days 8 hrs ago0xd100396d978a2cf7299122a2a012cd81541af9af IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000211695701
0x56f079f1c2fd51e989c9668b8bbe133b855edc00452785b6c486032b5045db4cDeposit324884962024-02-17 0:25:155 days 21 hrs ago0x536b8121fa1d05e2c7e1336da494d014e73b7db7 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000613819104
0x6022c98c671cf98a505cf8c8a3b7b811b7efd20d8e1240d967c66e0d47103d21Withdraw324789112024-02-16 10:19:456 days 11 hrs ago0xb3a29e6bee26663772e4d9d38b453a5add44433e IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000334066444
0xed92ad5401b4a9bcb87982d9f3890d3c49bb33962a2ecb57575305a980e38a23Deposit324788142024-02-16 10:11:056 days 12 hrs ago0xb3a29e6bee26663772e4d9d38b453a5add44433e IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000438347268
0xbea02a92604887bd8c6a7ac67cc0454e7e9a6db778f18c63a58e3a1fe5bc241eWithdraw324734422024-02-16 2:14:206 days 20 hrs ago0x972b8ed609d5577739cc585bc0ccab03aee621af IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000514724536
0xe228785cb52a7ee6bd98f0cccc89c62116d5fb26204bb6560b903b806885c685Deposit324731112024-02-16 1:44:106 days 20 hrs ago0x972b8ed609d5577739cc585bc0ccab03aee621af IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000583447755
0x017bff4d8f26e05dc42b55a042674f91cd2e6442e941d89768eace46e0171d3bWithdraw324254572024-02-13 3:43:059 days 18 hrs ago0x71ddf9acf07d4b10d6e6318a913f2f9ea4a0353e IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.001642542527
0x3df15abc1860ecbcbeb60c98315ab98c6ee71585a10cd9720850a53a4be271efDeposit324254342024-02-13 3:40:559 days 18 hrs ago0x71ddf9acf07d4b10d6e6318a913f2f9ea4a0353e IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.002165837972
0xe073e7eb2579bce6c275bb9aeee10a1a80572db915e292a58758fc010637c4b3Deposit323377402024-02-07 19:39:1515 days 2 hrs ago0xb13e18e5fc2044af2bcee31a2f972a22a5412ed5 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.00037862672
0xfb6bf56c57f23ae219729bb42bbec82a03dca9c733039b4662feb167eda8a9f2Deposit322912302024-02-04 22:25:1517 days 23 hrs ago0x32cb9fd13af7635cc90d0713a80188b366a28205 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0005438704
0xb1420412f0c36310232da53744e6e1fc229ffa66cd95b9450b186931f6323b76Deposit322861712024-02-04 15:00:0018 days 7 hrs ago0xbec6606a5c665a176db1300e24d7f0afee98e3c4 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000530867681
0xfa70b76bb013576d0ee63994489e5bb0c17f099f991cb04389ea1fc0b3f32709Withdraw322665642024-02-03 10:05:4519 days 12 hrs ago0x918ceba1ce6e71217a959fca88f66f8114792f22 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0013693746
0xa38b1361869403c6ad4272e22968486a7dba1887a7a3a308a64f29cbfa25fca5Deposit322505042024-02-02 10:28:5520 days 11 hrs ago0xa18453f015034d42d6c8169c3d88d2a01f52a180 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0007453544
0xa89bef98cdf062d940a015917f7380e6db33c410d6a4332daa3e28e109cb64dcWithdraw322220252024-01-31 16:39:3522 days 5 hrs ago0xbfee7af8264600f12e1e0e9f1f2c86ff62be5fbe IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000418259654
0x2a4825fc9ae6fb9038ceec7ec97b001b3f10c02f796b7e2996cc5b0bf26b3d89Withdraw322143392024-01-31 5:23:4022 days 16 hrs ago0xddac95994d0c3b6773801d26210e2b6b2f8e8dab IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0004940782
0x5d3bee02f090ed17506b7757fd6ecb46b1eb4da77aeeda3b058eca38e7c57dabDeposit321759182024-01-28 21:21:3025 days 56 mins ago0x302c469a8e85d9f6d604d5e7ca4836b86220d22f IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.000378541337
0x4bb5fd16eb3b6dadc88ac5dfb7b86fe1486fe1f32a39cbc41c308438969c597aDeposit321236892024-01-25 16:47:5028 days 5 hrs ago0x06c9b76a20102ed4fe052aec597f276fff53138f IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.00079047
0x2e691c2f1f2dca24966113179b2b55247d7ba24d1686e17f4c384451bd54621fWithdraw321175512024-01-25 7:47:1528 days 14 hrs ago0x4f4bd77781ceee4914b6bc16633d5437eabca5d3 IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.0004772817
0xe66de794ac776b6aedd2f57912a1ce6860bc5e0a3bdf58056d0ec8a91ea9f4a2Deposit320500462024-01-21 4:39:5532 days 17 hrs ago0x55f070c7f6bb99be3dbb079975422de692aaf68a IN  0x210abdfd989f3ee5c08614a8f4e096cf8408f5df0 xDAI0.001033098747
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0x225b378f79ea6982daa4806b4af03f7ddbdbcedcf68ecceccd363cd58278fd5a282172732023-05-31 10:15:00267 days 12 hrs ago 0x83e443ef4f9963c77bd860f94500075556668cb8  Contract Creation0 xDAI
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Minimal Proxy Contract for 0x96484f2abf5e58b15176dbf1a799627b53f13b6d

Contract Name:
Vyper_contract

Compiler Version
vyper:0.3.3

Optimization Enabled:
N/A

Other Settings:
, MIT license
Decompile ByteCode

Contract Source Code (Vyper language format)

# @version 0.3.3
"""
@title Child Liquidity Gauge
@license MIT
@author Curve Finance
"""
from vyper.interfaces import ERC20

implements: ERC20


interface ERC20Extended:
    def symbol() -> String[26]: view

interface Minter:
    def minted(_user: address, _gauge: address) -> uint256: view
    def getBalancerToken() -> address: view

interface ERC1271:
    def isValidSignature(_hash: bytes32, _signature: Bytes[65]) -> bytes32: view

interface AuthorizerAdaptor:
    def getVault() -> address: view

interface VotingEscrowDelegationProxy:
    def totalSupply() -> uint256: view
    def adjustedBalanceOf(_account: address) -> uint256: view


event Approval:
    _owner: indexed(address)
    _spender: indexed(address)
    _value: uint256

event Transfer:
    _from: indexed(address)
    _to: indexed(address)
    _value: uint256

event Deposit:
    _user: indexed(address)
    _value: uint256

event Withdraw:
    _user: indexed(address)
    _value: uint256

event UpdateLiquidityLimit:
    _user: indexed(address)
    _original_balance: uint256
    _original_supply: uint256
    _working_balance: uint256
    _working_supply: uint256


struct Reward:
    distributor: address
    period_finish: uint256
    rate: uint256
    last_update: uint256
    integral: uint256


DOMAIN_TYPE_HASH: constant(bytes32) = keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)")
PERMIT_TYPE_HASH: constant(bytes32) = keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)")
ERC1271_MAGIC_VAL: constant(bytes32) = 0x1626ba7e00000000000000000000000000000000000000000000000000000000

MAX_REWARDS: constant(uint256) = 8
TOKENLESS_PRODUCTION: constant(uint256) = 40
WEEK: constant(uint256) = 86400 * 7


BAL: immutable(address)
BAL_PSEUDO_MINTER: immutable(address)
VE_DELEGATION_PROXY: immutable(address)
BAL_VAULT: immutable(address)
AUTHORIZER_ADAPTOR: immutable(address)

DOMAIN_SEPARATOR: public(bytes32)
nonces: public(HashMap[address, uint256])

name: public(String[64])
symbol: public(String[32])

_allowance: HashMap[address, HashMap[address, uint256]]
balanceOf: public(HashMap[address, uint256])
totalSupply: public(uint256)

lp_token: public(address)
version: public(String[128])
factory: public(address)

working_balances: public(HashMap[address, uint256])
working_supply: public(uint256)

period: public(uint256)
period_timestamp: public(HashMap[uint256, uint256])

integrate_checkpoint_of: public(HashMap[address, uint256])
integrate_fraction: public(HashMap[address, uint256])
integrate_inv_supply: public(HashMap[uint256, uint256])
integrate_inv_supply_of: public(HashMap[address, uint256])

# For tracking external rewards
reward_count: public(uint256)
reward_tokens: public(address[MAX_REWARDS])
reward_data: public(HashMap[address, Reward])
# claimant -> default reward receiver
rewards_receiver: public(HashMap[address, address])
# reward token -> claiming address -> integral
reward_integral_for: public(HashMap[address, HashMap[address, uint256]])
# user -> token -> [uint128 claimable amount][uint128 claimed amount]
claim_data: HashMap[address, HashMap[address, uint256]]

is_killed: public(bool)
inflation_rate: public(HashMap[uint256, uint256])


@external
def __init__(
    _voting_escrow_delegation_proxy: address,
    _bal_pseudo_minter: address,
    _authorizer_adaptor: address,
    _version: String[128]
):
    self.lp_token = 0x000000000000000000000000000000000000dEaD
    self.version = _version
    self.factory = 0x000000000000000000000000000000000000dEaD

    VE_DELEGATION_PROXY = _voting_escrow_delegation_proxy
    BAL_PSEUDO_MINTER = _bal_pseudo_minter
    BAL = Minter(_bal_pseudo_minter).getBalancerToken()
    AUTHORIZER_ADAPTOR = _authorizer_adaptor
    BAL_VAULT = AuthorizerAdaptor(_authorizer_adaptor).getVault()


@internal
def _checkpoint(_user: address):
    """
    @notice Checkpoint a user calculating their BAL entitlement
    @param _user User address
    """
    period: uint256 = self.period
    period_time: uint256 = self.period_timestamp[period]
    integrate_inv_supply: uint256 = self.integrate_inv_supply[period]

    # If killed, we skip accumulating inflation in `integrate_inv_supply`
    if block.timestamp > period_time and not self.is_killed:

        working_supply: uint256 = self.working_supply
        prev_week_time: uint256 = period_time
        week_time: uint256 = min((period_time + WEEK) / WEEK * WEEK, block.timestamp)

        for i in range(256):
            dt: uint256 = week_time - prev_week_time

            if working_supply != 0:
                # we don't have to worry about crossing inflation epochs
                # and if we miss any weeks, those weeks inflation rates will be 0 for sure
                # but that means no one interacted with the gauge for that long
                integrate_inv_supply += self.inflation_rate[prev_week_time / WEEK] * 10 ** 18 * dt / working_supply

            if week_time == block.timestamp:
                break
            prev_week_time = week_time
            week_time = min(week_time + WEEK, block.timestamp)

    # check BAL balance and increase weekly inflation rate by delta for the rest of the week
    bal_balance: uint256 = ERC20(BAL).balanceOf(self)
    if bal_balance != 0:
        current_week: uint256 = block.timestamp / WEEK
        self.inflation_rate[current_week] += bal_balance / ((current_week + 1) * WEEK - block.timestamp)
        ERC20(BAL).transfer(BAL_PSEUDO_MINTER, bal_balance)

    period += 1
    self.period = period
    self.period_timestamp[period] = block.timestamp
    self.integrate_inv_supply[period] = integrate_inv_supply

    working_balance: uint256 = self.working_balances[_user]
    self.integrate_fraction[_user] += working_balance * (integrate_inv_supply - self.integrate_inv_supply_of[_user]) / 10 ** 18
    self.integrate_inv_supply_of[_user] = integrate_inv_supply
    self.integrate_checkpoint_of[_user] = block.timestamp


@internal
def _update_liquidity_limit(_user: address, _user_balance: uint256, _total_supply: uint256):
    """
    @notice Calculate working balances to apply amplification of BAL production.
    @param _user The user address
    @param _user_balance User's amount of liquidity (LP tokens)
    @param _total_supply Total amount of liquidity (LP tokens)
    """
    working_balance: uint256 = _user_balance * TOKENLESS_PRODUCTION / 100

    ve: address = VE_DELEGATION_PROXY
    if ve != ZERO_ADDRESS:
        ve_ts: uint256 = VotingEscrowDelegationProxy(ve).totalSupply()
        if ve_ts != 0:
            ve_user_balance: uint256 = VotingEscrowDelegationProxy(ve).adjustedBalanceOf(_user)
            working_balance += _total_supply * ve_user_balance / ve_ts * (100 - TOKENLESS_PRODUCTION) / 100
            working_balance = min(_user_balance, working_balance)

    old_working_balance: uint256 = self.working_balances[_user]
    self.working_balances[_user] = working_balance

    working_supply: uint256 = self.working_supply + working_balance - old_working_balance
    self.working_supply = working_supply

    log UpdateLiquidityLimit(_user, _user_balance, _total_supply, working_balance, working_supply)


@view
@internal
def _all_indexes() -> DynArray[uint256, MAX_REWARDS]:
    indexes: DynArray[uint256, MAX_REWARDS] = []
    for i in range(MAX_REWARDS):
        if i >= self.reward_count:
            break
        indexes.append(i)

    return indexes


@internal
def _checkpoint_rewards(
    _user: address,
    _total_supply: uint256,
    _claim: bool,
    _receiver: address,
    _input_reward_indexes: DynArray[uint256, MAX_REWARDS]
):
    """
    @notice Claim pending rewards and checkpoint rewards for a user
    """
    user_balance: uint256 = 0
    receiver: address = _receiver
    if _user != ZERO_ADDRESS:
        user_balance = self.balanceOf[_user]
        if _claim and _receiver == ZERO_ADDRESS:
            # if receiver is not explicitly declared, check if a default receiver is set
            receiver = self.rewards_receiver[_user]
            if receiver == ZERO_ADDRESS:
                # if no default receiver is set, direct claims to the user
                receiver = _user

    reward_count: uint256 = self.reward_count
    reward_indexes: DynArray[uint256, MAX_REWARDS] = []
    if len(_input_reward_indexes) == 0:
        reward_indexes = self._all_indexes()
    else:
        reward_indexes = _input_reward_indexes

    for i in reward_indexes:
        assert i < reward_count, "INVALID_REWARD_INDEX"

        token: address = self.reward_tokens[i]

        integral: uint256 = self.reward_data[token].integral
        last_update: uint256 = min(block.timestamp, self.reward_data[token].period_finish)
        duration: uint256 = last_update - self.reward_data[token].last_update
        if duration != 0:
            self.reward_data[token].last_update = last_update
            if _total_supply != 0:
                integral += duration * self.reward_data[token].rate * 10**18 / _total_supply
                self.reward_data[token].integral = integral

        if _user != ZERO_ADDRESS:
            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,
                        _abi_encode(
                            receiver,
                            total_claimable,
                            method_id=method_id("transfer(address,uint256)")
                        ),
                        max_outsize=32,
                    )
                    if len(response) != 0:
                        assert convert(response, bool), "TRANSFER_FAILURE"
                    self.claim_data[_user][token] = total_claimed + total_claimable
                elif new_claimable > 0:
                    self.claim_data[_user][token] = total_claimed + shift(total_claimable, 128)


@internal
def _transfer(_from: address, _to: address, _value: uint256):
    if _value == 0:
        return
    total_supply: uint256 = self.totalSupply

    has_rewards: bool = self.reward_count != 0
    for addr in [_from, _to]:
        self._checkpoint(addr)
        # We need to checkpoint all of the rewards before affecting the gauge token balance for a user,
        # but to do it safely we need to skip making external calls. Therefore, we set _claim to False.
        self._checkpoint_rewards(addr, total_supply, False, ZERO_ADDRESS, [])

    new_balance: uint256 = self.balanceOf[_from] - _value
    self.balanceOf[_from] = new_balance
    self._update_liquidity_limit(_from, new_balance, total_supply)

    new_balance = self.balanceOf[_to] + _value
    self.balanceOf[_to] = new_balance
    self._update_liquidity_limit(_to, new_balance, total_supply)

    log Transfer(_from, _to, _value)


@external
@nonreentrant("lock")
def deposit(_value: uint256, _user: address = msg.sender):
    """
    @notice Deposit `_value` LP tokens
    @param _value Number of tokens to deposit
    @param _user The account to send gauge tokens to
    """
    self._checkpoint(_user)
    if _value == 0:
        return

    total_supply: uint256 = self.totalSupply
    new_balance: uint256 = self.balanceOf[_user] + _value

    if self.reward_count != 0:
        # We need to checkpoint all of the rewards before affecting the gauge token balance for a user,
        # but to do it safely we need to skip making external calls. Therefore, we set _claim to False.
        self._checkpoint_rewards(_user, total_supply, False, ZERO_ADDRESS, [])

    total_supply += _value

    self.balanceOf[_user] = new_balance
    self.totalSupply = total_supply

    self._update_liquidity_limit(_user, new_balance, total_supply)

    ERC20(self.lp_token).transferFrom(msg.sender, self, _value)

    log Deposit(_user, _value)
    log Transfer(ZERO_ADDRESS, _user, _value)


@external
@nonreentrant("lock")
def withdraw(_value: uint256, _user: address = msg.sender):
    """
    @notice Withdraw `_value` LP tokens
    @param _value Number of tokens to withdraw
    @param _user The account to send LP tokens to
    """
    self._checkpoint(_user)
    if _value == 0:
        return

    total_supply: uint256 = self.totalSupply
    new_balance: uint256 = self.balanceOf[msg.sender] - _value

    if self.reward_count != 0:
        # We need to checkpoint all of the rewards before affecting the gauge token balance for a user,
        # but to do it safely we need to skip making external calls. Therefore, we set _claim to False.
        self._checkpoint_rewards(_user, total_supply, False, ZERO_ADDRESS, [])

    total_supply -= _value

    self.balanceOf[msg.sender] = new_balance
    self.totalSupply = total_supply

    self._update_liquidity_limit(msg.sender, new_balance, total_supply)

    ERC20(self.lp_token).transfer(_user, _value)

    log Withdraw(_user, _value)
    log Transfer(msg.sender, ZERO_ADDRESS, _value)


@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]

@external
@nonreentrant("lock")
def transferFrom(_from: address, _to: address, _value: uint256) -> bool:
    """
    @notice Transfer tokens from one address to another
    @param _from The address which you want to send tokens from
    @param _to The address which you want to transfer to
    @param _value the amount of tokens to be transferred
    @return bool success
    """
    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


@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
         {increaseAllowance} 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, "INVALID_OWNER"
    assert block.timestamp <= _deadline, "DEADLINE_EXPIRED"

    nonce: uint256 = self.nonces[_owner]
    digest: bytes32 = keccak256(
        concat(
            b"\x19\x01",
            self.DOMAIN_SEPARATOR,
            keccak256(_abi_encode(PERMIT_TYPE_HASH, _owner, _spender, _value, nonce, _deadline))
        )
    )

    if _owner.is_contract:
        sig: Bytes[65] = concat(_abi_encode(_r, _s), slice(convert(_v, bytes32), 31, 1))
        assert ERC1271(_owner).isValidSignature(digest, sig) == ERC1271_MAGIC_VAL, "INVALID_SIG"
    else:
        recovered_address: address = ecrecover(digest, convert(_v, uint256), convert(_r, uint256), convert(_s, uint256))
        assert recovered_address == _owner,"INVALID_SIG"

    self._allowance[_owner][_spender] = _value
    self.nonces[_owner] = nonce + 1

    log Approval(_owner, _spender, _value)
    return True


@external
@nonreentrant("lock")
def transfer(_to: address, _value: uint256) -> bool:
    """
    @notice Transfer token to a specified address
    @param _to The address to transfer to
    @param _value The amount to be transferred
    @return bool success
    """
    self._transfer(msg.sender, _to, _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


@external
def user_checkpoint(addr: address) -> bool:
    """
    @notice Record a checkpoint for `addr`
    @param addr User address
    @return bool success
    """
    self._checkpoint(addr)
    self._update_liquidity_limit(addr, self.balanceOf[addr], self.totalSupply)
    return True


@external
def claimable_tokens(addr: address) -> uint256:
    """
    @notice Get the number of claimable tokens per user
    @dev This function should be manually changed to "view" in the ABI
    @return uint256 number of claimable tokens per user
    """
    self._checkpoint(addr)
    return self.integrate_fraction[addr] - Minter(BAL_PSEUDO_MINTER).minted(addr, self)


@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(_user: address, _reward_token: address) -> uint256:
    """
    @notice Get the number of claimable reward tokens for a user
    @param _user Account to get reward amount for
    @param _reward_token Token to get reward amount for
    @return uint256 Claimable reward token amount
    """
    integral: uint256 = self.reward_data[_reward_token].integral
    total_supply: uint256 = self.totalSupply
    if total_supply != 0:
        last_update: uint256 = min(block.timestamp, self.reward_data[_reward_token].period_finish)
        duration: uint256 = last_update - self.reward_data[_reward_token].last_update
        integral += (duration * self.reward_data[_reward_token].rate * 10**18 / total_supply)

    integral_for: uint256 = self.reward_integral_for[_reward_token][_user]
    new_claimable: uint256 = self.balanceOf[_user] * (integral - integral_for) / 10**18

    return shift(self.claim_data[_user][_reward_token], -128) + new_claimable


@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,
    _reward_indexes: DynArray[uint256, MAX_REWARDS] = []
):
    """
    @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
    @param _reward_indexes Array with indexes of the rewards to be checkpointed (all of them by default)
    """
    if _receiver != ZERO_ADDRESS:
        assert _addr == msg.sender, "CANNOT_REDIRECT_CLAIM"  # dev: cannot redirect when claiming for another user
    self._checkpoint_rewards(_addr, self.totalSupply, True, _receiver, _reward_indexes)


@external
def add_reward(_reward_token: address, _distributor: address):
    """
    @notice Set the active reward contract.
    @dev The reward token cannot be BAL, since it is transferred automatically to the pseudo minter during checkpoints.
    """
    assert msg.sender == AUTHORIZER_ADAPTOR, "SENDER_NOT_ALLOWED"  # dev: only owner
    assert _reward_token != BAL, "CANNOT_ADD_BAL_REWARD"

    reward_count: uint256 = self.reward_count
    assert reward_count < MAX_REWARDS, "MAX_REWARDS_REACHED"
    assert self.reward_data[_reward_token].distributor == ZERO_ADDRESS, "REWARD_ALREADY_EXISTS"

    self.reward_data[_reward_token].distributor = _distributor
    self.reward_tokens[reward_count] = _reward_token
    self.reward_count = reward_count + 1


@external
def set_reward_distributor(_reward_token: address, _distributor: address):
    current_distributor: address = self.reward_data[_reward_token].distributor

    assert msg.sender in [current_distributor, AUTHORIZER_ADAPTOR], "SENDER_NOT_ALLOWED"
    assert current_distributor != ZERO_ADDRESS, "REWARD_NOT_ADDED"
    assert _distributor != ZERO_ADDRESS, "INVALID_DISTRIBUTOR"

    self.reward_data[_reward_token].distributor = _distributor


@external
@nonreentrant("lock")
def deposit_reward_token(_reward_token: address, _amount: uint256):
    assert msg.sender == self.reward_data[_reward_token].distributor, "SENDER_NOT_ALLOWED"

    # It is safe to checkpoint all the existing rewards as long as `_claim` is set to false (i.e. no external calls).
    self._checkpoint_rewards(ZERO_ADDRESS, self.totalSupply, False, ZERO_ADDRESS, [])

    response: Bytes[32] = raw_call(
        _reward_token,
        _abi_encode(
            msg.sender,
            self,
            _amount,
            method_id=method_id("transferFrom(address,address,uint256)")
        ),
        max_outsize=32,
    )
    if len(response) != 0:
        assert convert(response, bool), "TRANSFER_FROM_FAILURE"

    period_finish: uint256 = self.reward_data[_reward_token].period_finish
    if block.timestamp >= period_finish:
        self.reward_data[_reward_token].rate = _amount / WEEK
    else:
        remaining: uint256 = period_finish - block.timestamp
        leftover: uint256 = remaining * self.reward_data[_reward_token].rate
        self.reward_data[_reward_token].rate = (_amount + leftover) / WEEK

    self.reward_data[_reward_token].last_update = block.timestamp
    self.reward_data[_reward_token].period_finish = block.timestamp + WEEK


@external
def killGauge():
    """
    @notice Kills the gauge so it always yields a rate of 0 and so cannot mint BAL
    """
    assert msg.sender == AUTHORIZER_ADAPTOR, "SENDER_NOT_ALLOWED"  # dev: only owner

    self.is_killed = True


@external
def unkillGauge():
    """
    @notice Unkills the gauge so it can mint BAL again
    """
    assert msg.sender == AUTHORIZER_ADAPTOR, "SENDER_NOT_ALLOWED"  # dev: only owner

    self.is_killed = False


@view
@external
def decimals() -> uint256:
    """
    @notice Returns the number of decimals the token uses
    """
    return 18


@view
@external
def allowance(owner: address, spender: address) -> uint256:
    """
     @notice Get `spender`'s current allowance from `owner` 
    """
    return self._get_allowance(owner, spender)


@view
@external
def integrate_checkpoint() -> uint256:
    return self.period_timestamp[self.period]


@view
@external
def bal_token() -> address:
    return BAL


@view
@external
def bal_pseudo_minter() -> address:
    return BAL_PSEUDO_MINTER


@view
@external
def voting_escrow_delegation_proxy() -> address:
    return VE_DELEGATION_PROXY


@view
@external
def authorizer_adaptor() -> address:
    """
    @notice Return the authorizer adaptor address.
    """
    return AUTHORIZER_ADAPTOR


@external
def initialize(_lp_token: address, _version: String[128]):
    assert self.lp_token == ZERO_ADDRESS, "ALREADY_INITIALIZED"  # dev: already initialzed

    self.lp_token = _lp_token
    self.version = _version
    self.factory = msg.sender

    symbol: String[26] = ERC20Extended(_lp_token).symbol()
    name: String[64] = concat("Balancer ", symbol, " Gauge Deposit")

    self.name = name
    self.symbol = concat(symbol, "-gauge")

    self.period_timestamp[0] = block.timestamp
    self.DOMAIN_SEPARATOR = keccak256(
        _abi_encode(
            DOMAIN_TYPE_HASH,
            keccak256(name),
            keccak256(self.version),
            chain.id,
            self
        )
    )

Contract ABI

[{"name":"Approval","inputs":[{"name":"_owner","type":"address","indexed":true},{"name":"_spender","type":"address","indexed":true},{"name":"_value","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"Transfer","inputs":[{"name":"_from","type":"address","indexed":true},{"name":"_to","type":"address","indexed":true},{"name":"_value","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"Deposit","inputs":[{"name":"_user","type":"address","indexed":true},{"name":"_value","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"Withdraw","inputs":[{"name":"_user","type":"address","indexed":true},{"name":"_value","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"UpdateLiquidityLimit","inputs":[{"name":"_user","type":"address","indexed":true},{"name":"_original_balance","type":"uint256","indexed":false},{"name":"_original_supply","type":"uint256","indexed":false},{"name":"_working_balance","type":"uint256","indexed":false},{"name":"_working_supply","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"stateMutability":"nonpayable","type":"constructor","inputs":[{"name":"_voting_escrow_delegation_proxy","type":"address"},{"name":"_bal_pseudo_minter","type":"address"},{"name":"_authorizer_adaptor","type":"address"},{"name":"_version","type":"string"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"deposit","inputs":[{"name":"_value","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"deposit","inputs":[{"name":"_value","type":"uint256"},{"name":"_user","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"withdraw","inputs":[{"name":"_value","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"withdraw","inputs":[{"name":"_value","type":"uint256"},{"name":"_user","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"transferFrom","inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"approve","inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"permit","inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"},{"name":"_deadline","type":"uint256"},{"name":"_v","type":"uint8"},{"name":"_r","type":"bytes32"},{"name":"_s","type":"bytes32"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"transfer","inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"increaseAllowance","inputs":[{"name":"_spender","type":"address"},{"name":"_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":"user_checkpoint","inputs":[{"name":"addr","type":"address"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"claimable_tokens","inputs":[{"name":"addr","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"claimed_reward","inputs":[{"name":"_addr","type":"address"},{"name":"_token","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"claimable_reward","inputs":[{"name":"_user","type":"address"},{"name":"_reward_token","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"nonpayable","type":"function","name":"set_rewards_receiver","inputs":[{"name":"_receiver","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"claim_rewards","inputs":[],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"claim_rewards","inputs":[{"name":"_addr","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"claim_rewards","inputs":[{"name":"_addr","type":"address"},{"name":"_receiver","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"claim_rewards","inputs":[{"name":"_addr","type":"address"},{"name":"_receiver","type":"address"},{"name":"_reward_indexes","type":"uint256[]"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"add_reward","inputs":[{"name":"_reward_token","type":"address"},{"name":"_distributor","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"set_reward_distributor","inputs":[{"name":"_reward_token","type":"address"},{"name":"_distributor","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"deposit_reward_token","inputs":[{"name":"_reward_token","type":"address"},{"name":"_amount","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"killGauge","inputs":[],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"unkillGauge","inputs":[],"outputs":[]},{"stateMutability":"view","type":"function","name":"decimals","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"allowance","inputs":[{"name":"owner","type":"address"},{"name":"spender","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_checkpoint","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"bal_token","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"bal_pseudo_minter","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"voting_escrow_delegation_proxy","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"authorizer_adaptor","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"nonpayable","type":"function","name":"initialize","inputs":[{"name":"_lp_token","type":"address"},{"name":"_version","type":"string"}],"outputs":[]},{"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":"name","inputs":[],"outputs":[{"name":"","type":"string"}]},{"stateMutability":"view","type":"function","name":"symbol","inputs":[],"outputs":[{"name":"","type":"string"}]},{"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":"lp_token","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"version","inputs":[],"outputs":[{"name":"","type":"string"}]},{"stateMutability":"view","type":"function","name":"factory","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"working_balances","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"working_supply","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"period","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"period_timestamp","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_checkpoint_of","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_fraction","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_inv_supply","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_inv_supply_of","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"reward_count","inputs":[],"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_data","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"tuple","components":[{"name":"distributor","type":"address"},{"name":"period_finish","type":"uint256"},{"name":"rate","type":"uint256"},{"name":"last_update","type":"uint256"},{"name":"integral","type":"uint256"}]}]},{"stateMutability":"view","type":"function","name":"rewards_receiver","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"reward_integral_for","inputs":[{"name":"arg0","type":"address"},{"name":"arg1","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"is_killed","inputs":[],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"view","type":"function","name":"inflation_rate","inputs":[{"name":"arg0","type":"uint256"}],"outputs":[{"name":"","type":"uint256"}]}]

Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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