Contract 0xe74d531b0c7db81e84643d106522c783d61c9675

Txn Hash Method
Block
From
To
Value [Txn Fee]
0x90639bca34afece8474525d23f25c888c10b4bdddaebce9c5ef38e265464c587Withdraw20289272022-10-07 17:14:004 hrs 42 mins ago0x3a5b30f14df56eedcc2ba0d2679b3b09bc05afc1 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0144922
0x17744f51c5715378c1a1c76a48fa898d3a966a6b5ff26f7e2004ebf1b9225064Withdraw20277502022-10-07 13:13:128 hrs 43 mins ago0x13dda63c28bb95fe9822fea43ad5feaa966636a9 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.007766
0x078d39a032529225f0e815c6884ee4163f621077147878dbe0c9ee50397128aaClaim_rewards20277472022-10-07 13:12:368 hrs 43 mins ago0x13dda63c28bb95fe9822fea43ad5feaa966636a9 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0100242
0xdc955fdb8b0cc5171b16c9ead124312e0408f03d4d75d861971df52166f30036Withdraw20207752022-10-06 13:34:541 day 8 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0112443
0x1fd7e41121908bb839cf71c69418298f6599ef7310c35c85c0414f91015b5d93Withdraw20207662022-10-06 13:33:061 day 8 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0143268
0x3954bae7683a863b0804821010f00145f3c051f836b363f9ce900932303b3b31Claim_rewards20008562022-10-03 18:03:184 days 3 hrs ago0xd5d23839afd88bd704042b189ca84601047ce7ba IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0079949
0x750b6df96c16679e51249ad778ff882e1d67efb9d05174b62e4c80cf1710e889Withdraw20007592022-10-03 17:43:424 days 4 hrs ago0xd5d23839afd88bd704042b189ca84601047ce7ba IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0144922
0xf1a3e3a7f7da48b014e8e67b6b3edbecd44c426db4e1f75fd151482f6df71ad3Transfer19959472022-10-03 1:25:364 days 20 hrs ago0x27877a25240c6ece7283657e7048c6c6b19c464e IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.022183028
0xa92bc9d535956e4da5e8fe1b078fbc651760b9d6f7be9e9a4fa1e12ef189e59fDeposit19938242022-10-02 18:13:245 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0146144
0xcf63bf54dc92c8ff8da6a4443b5eb8aa7cfbf0c54bfb553b55827b168be8161aWithdraw19937962022-10-02 18:07:425 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0101353
0x5905f1d85d89c413b793fc681c9d415ea725fa19b407bc8f6aa41db97f8178b8Withdraw19937942022-10-02 18:07:185 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0128382
0xf6cc86c6bd8c0a7b0b576fda9e2fd9784ea527440bf30a1d3931d841a654e36dDeposit19937862022-10-02 18:05:365 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0146144
0xb1456d4ce8457ad8e588fb8e4bcc8a95bf317d7aeaa9b3049f7c71eb7fb01214Withdraw19937792022-10-02 18:04:125 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0128382
0x416504680e485d518305b659d61b9d20f4ecd9a5ed770a0503418813f0e1ea21Deposit19937762022-10-02 18:03:365 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0146144
0xb249085387dcbf450d27110bff912efab2b85c6813e32025da45b4aec4d5ce9cClaim_rewards19937712022-10-02 18:02:365 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0079949
0xd8545b1c7f2c710c4f353d4ec802dc0f7f475a4472806fadebc1115fe0ad6545Withdraw19937692022-10-02 18:02:125 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0112509
0xc04f220c89df7f381191af4623cf7d42d39b149a02f7ecdef19f45a4773a6bc9Withdraw19937672022-10-02 18:01:425 days 3 hrs ago0xae59aa5e75673d7aaed125ea526dae5daae92330 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.014134
0x5463a99ae273d66b6e6dc110a9095916b63a6f02fdb35e5b80001a2c18207af9Claim_rewards19908412022-10-02 8:03:485 days 13 hrs ago0xa813e524f266852c47d3a557b4c1191db7b7db1b IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0079949
0xee29cc0a1657016fc0ef75272f385828ccc7a4dc33343a7117ecd2bc850c2a6eWithdraw19908392022-10-02 8:03:245 days 13 hrs ago0xa813e524f266852c47d3a557b4c1191db7b7db1b IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.007766
0x9a6d6be4d9286ae847df7e2117ca83710fde87e14be438d06950aa3833d86fccWithdraw19908342022-10-02 8:02:245 days 13 hrs ago0xa813e524f266852c47d3a557b4c1191db7b7db1b IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0144922
0x7c2cfb907b7e5628f8df6ac8cb452f9db5cf067066ddc831818f4e7189e6518bClaim_rewards19838312022-10-01 8:10:126 days 13 hrs ago0x6c30cfb7b19f9b5a8387a8bbff2cc60ac1909c04 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0079949
0xcb7b33f3ee9e5817993c4767bc99463d6e1560e45127790dd30e737d5d08fc09Withdraw19837912022-10-01 8:02:006 days 13 hrs ago0x6c30cfb7b19f9b5a8387a8bbff2cc60ac1909c04 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0144922
0x507b6477aaa1907a899abed926a391914beb838acf1caab2adc01c842151f696Claim_rewards19788392022-09-30 15:12:127 days 6 hrs ago0x9e6f8c7b8fcefe84888c756ec0c09b876f8779b7 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0079949
0x357cc56a52ab3c9859a61fa718637cde46697f1fde5e5659dccf9c9b560452a6Withdraw19788342022-09-30 15:11:007 days 6 hrs ago0x9e6f8c7b8fcefe84888c756ec0c09b876f8779b7 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.007766
0x1a651d7fa0bec47368ea019496afd7678947718d3c99856546eadeaaa6b2e214Withdraw19788312022-09-30 15:10:247 days 6 hrs ago0x9e6f8c7b8fcefe84888c756ec0c09b876f8779b7 IN  0xe74d531b0c7db81e84643d106522c783d61c96750 GLMR0.0144922
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0xbe1c6c2cd37160a0f1d4224359b68b72b97db844fba30b724824b1cf34fd88e511474652022-06-01 10:08:48128 days 11 hrs ago 0xabc000d88f23bb45525e447528dbf656a9d55bf5  Contract Creation0 GLMR
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Minimal Proxy Contract for 0x9336da074c4f585a8b59a8c2b77a32b630cde5a1

Contract Name:
Vyper_contract

Compiler Version
vyper:0.3.1

Optimization Enabled:
N/A

Other Settings:
, None license
Decompile ByteCode

Contract Source Code (Vyper language format)

# @version 0.3.1
"""
@title Child Liquidity Gauge
@license MIT
@author Curve Finance
"""
from vyper.interfaces import ERC20

implements: ERC20


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

interface Factory:
    def owner() -> address: view
    def voting_escrow() -> address: view

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

interface ERC1271:
    def isValidSignature(_hash: bytes32, _signature: Bytes[65]) -> bytes32: 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
VERSION: constant(String[8]) = "v0.1.0"


CRV: immutable(address)
FACTORY: immutable(address)


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

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

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

lp_token: public(address)
manager: public(address)

voting_escrow: 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__(_crv_token: address, _factory: address):
    self.lp_token = 0x000000000000000000000000000000000000dEaD

    CRV = _crv_token
    FACTORY = _factory


@internal
def _checkpoint(_user: address):
    """
    @notice Checkpoint a user calculating their CRV 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 block.timestamp > period_time:

        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 CRV balance and increase weekly inflation rate by delta for the rest of the week
    crv_balance: uint256 = ERC20(CRV).balanceOf(self)
    if crv_balance != 0:
        current_week: uint256 = block.timestamp / WEEK
        self.inflation_rate[current_week] += crv_balance / ((current_week + 1) * WEEK - block.timestamp)
        ERC20(CRV).transfer(FACTORY, crv_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 CRV production.
    @dev https://resources.curve.fi/guides/boosting-your-crv-rewards#formula
    @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 = self.voting_escrow
    if ve != ZERO_ADDRESS:
        ve_ts: uint256 = ERC20(ve).totalSupply()
        if ve_ts != 0:
            working_balance += _total_supply * ERC20(ve).balanceOf(_user) / 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)


@internal
def _checkpoint_rewards(_user: address, _total_supply: uint256, _claim: bool, _receiver: address):
    """
    @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
    for i in range(MAX_REWARDS):
        if i == reward_count:
            break
        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)
                    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)
        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, _claim_rewards: bool = False):
    """
    @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:
        self._checkpoint_rewards(_user, total_supply, _claim_rewards, 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, _claim_rewards: bool = False):
    """
    @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:
        self._checkpoint_rewards(_user, total_supply, _claim_rewards, 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)


@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.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
    assert block.timestamp <= _deadline

    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
    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
@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.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.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
    """
    assert msg.sender in [addr, FACTORY]  # dev: unauthorized
    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(FACTORY).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):
    """
    @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
def add_reward(_reward_token: address, _distributor: address):
    """
    @notice Set the active reward contract
    """
    assert msg.sender == self.manager or msg.sender == Factory(FACTORY).owner()

    reward_count: uint256 = self.reward_count
    assert reward_count < MAX_REWARDS
    assert self.reward_data[_reward_token].distributor == ZERO_ADDRESS

    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 == current_distributor or msg.sender == self.manager or msg.sender == Factory(FACTORY).owner()
    assert current_distributor != ZERO_ADDRESS
    assert _distributor != ZERO_ADDRESS

    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

    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)

    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 set_manager(_manager: address):
    assert msg.sender == Factory(FACTORY).owner()

    self.manager = _manager


@external
def update_voting_escrow():
    """
    @notice Update the voting escrow contract in storage
    """
    self.voting_escrow = Factory(FACTORY).voting_escrow()


@external
def set_killed(_is_killed: bool):
    """
    @notice Set the kill status of the gauge
    @param _is_killed Kill status to put the gauge into
    """
    assert msg.sender == Factory(FACTORY).owner()

    self.is_killed = _is_killed


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


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


@view
@external
def version() -> String[8]:
    return VERSION


@view
@external
def factory() -> address:
    return FACTORY


@external
def initialize(_lp_token: address, _manager: address):
    assert self.lp_token == ZERO_ADDRESS  # dev: already initialzed

    self.lp_token = _lp_token
    self.manager = _manager

    self.voting_escrow = Factory(msg.sender).voting_escrow()

    symbol: String[26] = ERC20Extended(_lp_token).symbol()
    name: String[64] = concat("Curve.fi ", 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(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":"_crv_token","type":"address"},{"name":"_factory","type":"address"}],"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":"deposit","inputs":[{"name":"_value","type":"uint256"},{"name":"_user","type":"address"},{"name":"_claim_rewards","type":"bool"}],"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":"withdraw","inputs":[{"name":"_value","type":"uint256"},{"name":"_user","type":"address"},{"name":"_claim_rewards","type":"bool"}],"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":"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":"set_manager","inputs":[{"name":"_manager","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"update_voting_escrow","inputs":[],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"set_killed","inputs":[{"name":"_is_killed","type":"bool"}],"outputs":[]},{"stateMutability":"view","type":"function","name":"decimals","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"integrate_checkpoint","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"version","inputs":[],"outputs":[{"name":"","type":"string"}]},{"stateMutability":"view","type":"function","name":"factory","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"nonpayable","type":"function","name":"initialize","inputs":[{"name":"_lp_token","type":"address"},{"name":"_manager","type":"address"}],"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":"allowance","inputs":[{"name":"arg0","type":"address"},{"name":"arg1","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"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":"manager","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"voting_escrow","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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