Contract 0xad86ef5fd2ebc25bb9db41a1fe8d0f2a322c7839 12

Contract Overview

Snowball: SNOB Fee Distributor
Balance:
0 AVAX

AVAX Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x93bd79ec5aaec9aabfcd24d227e4bb7064353235c7c34a7dd0b82b6c95b9708aClaim357178552023-09-27 8:26:097 days 18 hrs ago0xa12be66dc0c7f33050692b7ccf44723454e5c1a0 IN  Snowball: SNOB Fee Distributor0 AVAX0.00622803 26.5
0x6d2366cd413b7ee6356b95f115ef3db80cbda0f7d756becc07b54219667b7743Claim356771402023-09-26 9:27:478 days 17 hrs ago0xcfc9c2c8dd04cb3e2ba1acf7c7d612593bf2ab74 IN  Snowball: SNOB Fee Distributor0 AVAX0.007930204526.5
0x4ebb0c299a7ba339c033a7c65fff1d6a403c02fb5597f8ee74ad630428879312Claim356699242023-09-26 5:24:108 days 21 hrs ago0xea4ddc1921a322dae69458920e9c6a61d0a4f7aa IN  Snowball: SNOB Fee Distributor0 AVAX0.00981189 26.5
0xba9ded832343a5eeb1ebc004dc8ac39ee74c631ad6ac9b70a63ebf5731f6523bClaim356670582023-09-26 3:46:208 days 22 hrs ago0xb3374a4f15ff60937439b39bf12408ed9a3c0333 IN  Snowball: SNOB Fee Distributor0 AVAX0.0163802595 26.5
0x18732ef07735e534cb15093246f4eff5adddf8ca27c9be998f7cad78e45cb8cbClaim353579552023-09-18 20:35:5916 days 6 hrs ago0x99bb6210d2111382c323800ba2641eaa42fea0e2 IN  Snowball: SNOB Fee Distributor0 AVAX0.0099038257 27.425
0xadefb3404d83a21eb9eb832cd8ebae5dfe616ce5120b40fef62684c96addeac2Claim353557342023-09-18 19:20:1516 days 7 hrs ago0x9dc1eb2f96a03f4054e5fe2e80cf23c75d0fe93f IN  Snowball: SNOB Fee Distributor0 AVAX0.003589478 26.5
0xff9bf834ca43bef919cd7c2ed02fa3ea03ecce1803522a79c91b71ea2decfcf7Claim352947532023-09-17 8:46:0717 days 17 hrs ago0xcb0a6a9b0e0f1ed969ee63735f0daf27f97a60de IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0xcac928554dc1e080cb95b85eb62671e2960ff61b61b1ada94901a11bdf0a4362Claim352946692023-09-17 8:43:1617 days 18 hrs ago0x059948bb5afcecc61dc6f73d00091a0362866faf IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0xd20b390589120bbf4c9d362e59a29ecc4d7a81950231c91a83cf9478b8d953d5Claim352945942023-09-17 8:40:4317 days 18 hrs ago0xfc4d9fa214a7501109ad02407fa3bd351f09a05e IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0x89f7359ea08406be78ade29572aa7f72f88d7b91383da1adbe82280ece84457bClaim352945222023-09-17 8:38:1517 days 18 hrs ago0xeb76c49cdf8d5635c7db2c7620ac7597bcfb0dbe IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0x593f39f74d64d4a9cef78a980bdf7fc05558d861bf6af5796c4c9520a71db4f6Claim352944602023-09-17 8:36:1017 days 18 hrs ago0xc70758c8de82733bb57a69867eeb680139ca11c6 IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0x4ee211748fea5f41fe18fc4051142993b6ec0bb51ad9ff0b43c159c1b219e4edClaim352943902023-09-17 8:33:4617 days 18 hrs ago0xe08948c081cc1f95c175fb8e051d4202975c85d0 IN  Snowball: SNOB Fee Distributor0 AVAX0.00610645527
0x0237af09d1964b54acc747670a742eedfb9096d498cb5978faa0ab01c82c88deClaim352943112023-09-17 8:31:0717 days 18 hrs ago0xa1e05ffce891d55df34ed0603568c8441db60006 IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0x46fa0b5d38ea25934942c9928b42028709568e5f7fee075a1fbc9ac1ca677004Claim352942182023-09-17 8:28:0117 days 18 hrs ago0xc2319ca836b78e77a251b1f7ddf6f87904953641 IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0xbd3abac0da6af4fb859f905405c52c836c4f8212d87a65da86a2d8022a859112Claim352940222023-09-17 8:21:2817 days 18 hrs ago0x1811acab289553b4c027c34b1b90088c3fd09569 IN  Snowball: SNOB Fee Distributor0 AVAX0.0067849530
0x9ad6216c1e396ccc51a68ad3ab771f656d2db9d706b02b895329dac32b6a9fceClaim352930722023-09-17 7:49:2517 days 18 hrs ago0xc5f7adb1429ca00a0f280e503e242ecc6b7e8db7 IN  Snowball: SNOB Fee Distributor0 AVAX0.0066424660529.37
0x67484f528d676d37267c2e56dd774d39a2468887df2f55dd51abbd4826d456ecClaim352930282023-09-17 7:47:5617 days 18 hrs ago0xadb675b926b6894c14538c9406304f3b6542c0ad IN  Snowball: SNOB Fee Distributor0 AVAX0.0066424660529.37
0x71a9fc2b3504676a6d93608347a65393e71213b2067c7a83ad5209c83d53b095Claim352923202023-09-17 7:23:5417 days 19 hrs ago0x32bada1ebf308db95ea107e5bfeeeb1cc8a0543d IN  Snowball: SNOB Fee Distributor0 AVAX0.0063326228
0x65cbd61bc764ec425f7ad6a7ca22b5b04b930dfc288cec367c6a1b0130a492d6Claim352920992023-09-17 7:16:2617 days 19 hrs ago0xda26e9b4184715635ca91d9d67a9b54eef450919 IN  Snowball: SNOB Fee Distributor0 AVAX0.0067510252529.85
0x032bf57e5bd471c2ca70298bc83453ad803e40a3922e586308bdebc3263bdc84Claim352901612023-09-17 6:10:0317 days 20 hrs ago0x3f32e503e5973933cef8e04cf7d19a6570094c0d IN  Snowball: SNOB Fee Distributor0 AVAX0.00633128427
0xbfe893ae1169967d85cd0803cae77ab3e23fe5fa5b03f57eca989b790313889eClaim351831312023-09-14 17:04:3120 days 9 hrs ago0x3b4b0d8853db68f290757e8d5de2e5c7893ddab0 IN  Snowball: SNOB Fee Distributor0 AVAX0.003922689 26.5
0x8b407c8910e4777a764f288604c7a73cc58f3ef01a19c30bd088036a955a2bdaClaim351825322023-09-14 16:44:2020 days 9 hrs ago0x86b6efe6c2bd5c802e30e9e815fa752a4b09edf7 IN  Snowball: SNOB Fee Distributor0 AVAX0.01912562021 26.41
0x52949d4c9d028b96ff597818fba67163e1b3fdea1401c9053fb306798a55ce5bClaim350980002023-09-12 16:49:4322 days 9 hrs ago0x6d43a77a27b9097c7941413decaae9b83d6835ee IN  Snowball: SNOB Fee Distributor0 AVAX0.00981189 26.5
0xcc2180f58321df710c5bf316aa8f5cb41370ca354e1a09f4401cea08a0e49f79Claim350979752023-09-12 16:48:5322 days 9 hrs ago0x6d43a77a27b9097c7941413decaae9b83d6835ee IN  Snowball: SNOB Fee Distributor0 AVAX0.010949005 26.5
0x1fe2e76c9d5175c31ccfcbb786fdb4ab9938c9d8023ca2358a02d30c72bd04a2Claim350839172023-09-12 8:57:2622 days 17 hrs ago0xec00812ac62c2be2378f4fcbe67ec576cae4b36e IN  Snowball: SNOB Fee Distributor0 AVAX0.0100325555 26.5
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Contract Source Code Verified (Exact Match)

Contract Name:
Vyper_contract

Compiler Version
vyper:0.2.7

Optimization Enabled:
N/A

Other Settings:
, MIT license

Contract Source Code (Vyper language format)

# @version 0.2.7
"""
@title Curve Fee Distribution
@author Curve Finance
@license MIT
"""

from vyper.interfaces import ERC20


interface VotingEscrow:
    def user_point_epoch(addr: address) -> uint256: view
    def epoch() -> uint256: view
    def user_point_history(addr: address, loc: uint256) -> Point: view
    def point_history(loc: uint256) -> Point: view
    def checkpoint(): nonpayable


event CommitAdmin:
    admin: address

event ApplyAdmin:
    admin: address

event ToggleAllowCheckpointToken:
    toggle_flag: bool

event CheckpointToken:
    time: uint256
    tokens: uint256

event Claimed:
    recipient: indexed(address)
    amount: uint256
    claim_epoch: uint256
    max_epoch: uint256


struct Point:
    bias: int128
    slope: int128  # - dweight / dt
    ts: uint256
    blk: uint256  # block


WEEK: constant(uint256) = 7 * 86400
TOKEN_CHECKPOINT_DEADLINE: constant(uint256) = 86400

start_time: public(uint256)
time_cursor: public(uint256)
time_cursor_of: public(HashMap[address, uint256])
user_epoch_of: public(HashMap[address, uint256])

last_token_time: public(uint256)
tokens_per_week: public(uint256[1000000000000000])

voting_escrow: public(address)
token: public(address)
total_received: public(uint256)
token_last_balance: public(uint256)

ve_supply: public(uint256[1000000000000000])  # VE total supply at week bounds

admin: public(address)
future_admin: public(address)
can_checkpoint_token: public(bool)
emergency_return: public(address)
is_killed: public(bool)


@external
def __init__(
    _voting_escrow: address,
    _start_time: uint256,
    _token: address,
    _admin: address,
    _emergency_return: address
):
    """
    @notice Contract constructor
    @param _voting_escrow VotingEscrow contract address
    @param _start_time Epoch time for fee distribution to start
    @param _token Fee token address (3CRV)
    @param _admin Admin address
    @param _emergency_return Address to transfer `_token` balance to
                             if this contract is killed
    """
    t: uint256 = _start_time / WEEK * WEEK
    self.start_time = t
    self.last_token_time = t
    self.time_cursor = t
    self.token = _token
    self.voting_escrow = _voting_escrow
    self.admin = _admin
    self.emergency_return = _emergency_return


@internal
def _checkpoint_token():
    token_balance: uint256 = ERC20(self.token).balanceOf(self)
    to_distribute: uint256 = token_balance - self.token_last_balance
    self.token_last_balance = token_balance

    t: uint256 = self.last_token_time
    since_last: uint256 = block.timestamp - t
    self.last_token_time = block.timestamp
    this_week: uint256 = t / WEEK * WEEK
    next_week: uint256 = 0

    for i in range(20):
        next_week = this_week + WEEK
        if block.timestamp < next_week:
            if since_last == 0 and block.timestamp == t:
                self.tokens_per_week[this_week] += to_distribute
            else:
                self.tokens_per_week[this_week] += to_distribute * (block.timestamp - t) / since_last
            break
        else:
            if since_last == 0 and next_week == t:
                self.tokens_per_week[this_week] += to_distribute
            else:
                self.tokens_per_week[this_week] += to_distribute * (next_week - t) / since_last
        t = next_week
        this_week = next_week

    log CheckpointToken(block.timestamp, to_distribute)


@external
def checkpoint_token():
    """
    @notice Update the token checkpoint
    @dev Calculates the total number of tokens to be distributed in a given week.
         During setup for the initial distribution this function is only callable
         by the contract owner. Beyond initial distro, it can be enabled for anyone
         to call.
    """
    assert (msg.sender == self.admin) or\
           (self.can_checkpoint_token and (block.timestamp > self.last_token_time + TOKEN_CHECKPOINT_DEADLINE))
    self._checkpoint_token()


@internal
def _find_timestamp_epoch(ve: address, _timestamp: uint256) -> uint256:
    _min: uint256 = 0
    _max: uint256 = VotingEscrow(ve).epoch()
    for i in range(128):
        if _min >= _max:
            break
        _mid: uint256 = (_min + _max + 2) / 2
        pt: Point = VotingEscrow(ve).point_history(_mid)
        if pt.ts <= _timestamp:
            _min = _mid
        else:
            _max = _mid - 1
    return _min


@view
@internal
def _find_timestamp_user_epoch(ve: address, user: address, _timestamp: uint256, max_user_epoch: uint256) -> uint256:
    _min: uint256 = 0
    _max: uint256 = max_user_epoch
    for i in range(128):
        if _min >= _max:
            break
        _mid: uint256 = (_min + _max + 2) / 2
        pt: Point = VotingEscrow(ve).user_point_history(user, _mid)
        if pt.ts <= _timestamp:
            _min = _mid
        else:
            _max = _mid - 1
    return _min


@view
@external
def ve_for_at(_user: address, _timestamp: uint256) -> uint256:
    """
    @notice Get the veCRV balance for `_user` at `_timestamp`
    @param _user Address to query balance for
    @param _timestamp Epoch time
    @return uint256 veCRV balance
    """
    ve: address = self.voting_escrow
    max_user_epoch: uint256 = VotingEscrow(ve).user_point_epoch(_user)
    epoch: uint256 = self._find_timestamp_user_epoch(ve, _user, _timestamp, max_user_epoch)
    pt: Point = VotingEscrow(ve).user_point_history(_user, epoch)
    return convert(max(pt.bias - pt.slope * convert(_timestamp - pt.ts, int128), 0), uint256)


@internal
def _checkpoint_total_supply():
    ve: address = self.voting_escrow
    t: uint256 = self.time_cursor
    rounded_timestamp: uint256 = block.timestamp / WEEK * WEEK
    VotingEscrow(ve).checkpoint()

    for i in range(20):
        if t > rounded_timestamp:
            break
        else:
            epoch: uint256 = self._find_timestamp_epoch(ve, t)
            pt: Point = VotingEscrow(ve).point_history(epoch)
            dt: int128 = 0
            if t > pt.ts:
                # If the point is at 0 epoch, it can actually be earlier than the first deposit
                # Then make dt 0
                dt = convert(t - pt.ts, int128)
            self.ve_supply[t] = convert(max(pt.bias - pt.slope * dt, 0), uint256)
        t += WEEK

    self.time_cursor = t


@external
def checkpoint_total_supply():
    """
    @notice Update the veCRV total supply checkpoint
    @dev The checkpoint is also updated by the first claimant each
         new epoch week. This function may be called independently
         of a claim, to reduce claiming gas costs.
    """
    self._checkpoint_total_supply()


@internal
def _claim(addr: address, ve: address, _last_token_time: uint256) -> uint256:
    # Minimal user_epoch is 0 (if user had no point)
    user_epoch: uint256 = 0
    to_distribute: uint256 = 0

    max_user_epoch: uint256 = VotingEscrow(ve).user_point_epoch(addr)
    _start_time: uint256 = self.start_time

    if max_user_epoch == 0:
        # No lock = no fees
        return 0

    week_cursor: uint256 = self.time_cursor_of[addr]
    if week_cursor == 0:
        # Need to do the initial binary search
        user_epoch = self._find_timestamp_user_epoch(ve, addr, _start_time, max_user_epoch)
    else:
        user_epoch = self.user_epoch_of[addr]

    if user_epoch == 0:
        user_epoch = 1

    user_point: Point = VotingEscrow(ve).user_point_history(addr, user_epoch)

    if week_cursor == 0:
        week_cursor = (user_point.ts + WEEK - 1) / WEEK * WEEK

    if week_cursor >= _last_token_time:
        return 0

    if week_cursor < _start_time:
        week_cursor = _start_time
    old_user_point: Point = empty(Point)

    # Iterate over weeks
    for i in range(50):
        if week_cursor >= _last_token_time:
            break

        if week_cursor >= user_point.ts and user_epoch <= max_user_epoch:
            user_epoch += 1
            old_user_point = user_point
            if user_epoch > max_user_epoch:
                user_point = empty(Point)
            else:
                user_point = VotingEscrow(ve).user_point_history(addr, user_epoch)

        else:
            # Calc
            # + i * 2 is for rounding errors
            dt: int128 = convert(week_cursor - old_user_point.ts, int128)
            balance_of: uint256 = convert(max(old_user_point.bias - dt * old_user_point.slope, 0), uint256)
            if balance_of == 0 and user_epoch > max_user_epoch:
                break
            if balance_of > 0:
                to_distribute += balance_of * self.tokens_per_week[week_cursor] / self.ve_supply[week_cursor]

            week_cursor += WEEK

    user_epoch = min(max_user_epoch, user_epoch - 1)
    self.user_epoch_of[addr] = user_epoch
    self.time_cursor_of[addr] = week_cursor

    log Claimed(addr, to_distribute, user_epoch, max_user_epoch)

    return to_distribute


@external
@nonreentrant('lock')
def claim(_addr: address = msg.sender) -> uint256:
    """
    @notice Claim fees for `_addr`
    @dev Each call to claim look at a maximum of 50 user veCRV points.
         For accounts with many veCRV related actions, this function
         may need to be called more than once to claim all available
         fees. In the `Claimed` event that fires, if `claim_epoch` is
         less than `max_epoch`, the account may claim again.
    @param _addr Address to claim fees for
    @return uint256 Amount of fees claimed in the call
    """
    assert not self.is_killed

    if block.timestamp >= self.time_cursor:
        self._checkpoint_total_supply()

    last_token_time: uint256 = self.last_token_time

    if self.can_checkpoint_token and (block.timestamp > last_token_time + TOKEN_CHECKPOINT_DEADLINE):
        self._checkpoint_token()
        last_token_time = block.timestamp

    last_token_time = last_token_time / WEEK * WEEK

    amount: uint256 = self._claim(_addr, self.voting_escrow, last_token_time)
    if amount != 0:
        token: address = self.token
        assert ERC20(token).transfer(_addr, amount)
        self.token_last_balance -= amount

    return amount


@external
@nonreentrant('lock')
def claim_many(_receivers: address[20]) -> bool:
    """
    @notice Make multiple fee claims in a single call
    @dev Used to claim for many accounts at once, or to make
         multiple claims for the same address when that address
         has significant veCRV history
    @param _receivers List of addresses to claim for. Claiming
                      terminates at the first `ZERO_ADDRESS`.
    @return bool success
    """
    assert not self.is_killed

    if block.timestamp >= self.time_cursor:
        self._checkpoint_total_supply()

    last_token_time: uint256 = self.last_token_time

    if self.can_checkpoint_token and (block.timestamp > last_token_time + TOKEN_CHECKPOINT_DEADLINE):
        self._checkpoint_token()
        last_token_time = block.timestamp

    last_token_time = last_token_time / WEEK * WEEK
    voting_escrow: address = self.voting_escrow
    token: address = self.token
    total: uint256 = 0

    for addr in _receivers:
        if addr == ZERO_ADDRESS:
            break

        amount: uint256 = self._claim(addr, voting_escrow, last_token_time)
        if amount != 0:
            assert ERC20(token).transfer(addr, amount)
            total += amount

    if total != 0:
        self.token_last_balance -= total

    return True


@external
def burn(_coin: address) -> bool:
    """
    @notice Receive 3CRV into the contract and trigger a token checkpoint
    @param _coin Address of the coin being received (must be 3CRV)
    @return bool success
    """
    assert _coin == self.token
    assert not self.is_killed

    amount: uint256 = ERC20(_coin).balanceOf(msg.sender)
    if amount != 0:
        ERC20(_coin).transferFrom(msg.sender, self, amount)
        if self.can_checkpoint_token and (block.timestamp > self.last_token_time + TOKEN_CHECKPOINT_DEADLINE):
            self._checkpoint_token()

    return True


@external
def commit_admin(_addr: address):
    """
    @notice Commit transfer of ownership
    @param _addr New admin address
    """
    assert msg.sender == self.admin  # dev: access denied
    self.future_admin = _addr
    log CommitAdmin(_addr)


@external
def apply_admin():
    """
    @notice Apply transfer of ownership
    """
    assert msg.sender == self.admin
    assert self.future_admin != ZERO_ADDRESS
    future_admin: address = self.future_admin
    self.admin = future_admin
    log ApplyAdmin(future_admin)


@external
def toggle_allow_checkpoint_token():
    """
    @notice Toggle permission for checkpointing by any account
    """
    assert msg.sender == self.admin
    flag: bool = not self.can_checkpoint_token
    self.can_checkpoint_token = flag
    log ToggleAllowCheckpointToken(flag)


@external
def kill_me():
    """
    @notice Kill the contract
    @dev Killing transfers the entire 3CRV balance to the emergency return address
         and blocks the ability to claim or burn. The contract cannot be unkilled.
    """
    assert msg.sender == self.admin

    self.is_killed = True

    token: address = self.token
    assert ERC20(token).transfer(self.emergency_return, ERC20(token).balanceOf(self))


@external
def recover_balance(_coin: address) -> bool:
    """
    @notice Recover ERC20 tokens from this contract
    @dev Tokens are sent to the emergency return address.
    @param _coin Token address
    @return bool success
    """
    assert msg.sender == self.admin
    assert _coin != self.token

    amount: uint256 = ERC20(_coin).balanceOf(self)
    response: Bytes[32] = raw_call(
        _coin,
        concat(
            method_id("transfer(address,uint256)"),
            convert(self.emergency_return, bytes32),
            convert(amount, bytes32),
        ),
        max_outsize=32,
    )
    if len(response) != 0:
        assert convert(response, bool)

    return True

Contract ABI

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:"function","gas":1991}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

00000000000000000000000083952e7ab4aca74ca96217d6f8f7591bead6d64e0000000000000000000000000000000000000000000000000000000060acb010000000000000000000000000c38f41a296a4493ff429f1238e030924a1542e50000000000000000000000000294ab3200ef36200db84c4128b7f1b4eec71e38a000000000000000000000000294ab3200ef36200db84c4128b7f1b4eec71e38a

-----Decoded View---------------
Arg [0] : _voting_escrow (address): 0x83952e7ab4aca74ca96217d6f8f7591bead6d64e
Arg [1] : _start_time (uint256): 1621930000
Arg [2] : _token (address): 0xc38f41a296a4493ff429f1238e030924a1542e50
Arg [3] : _admin (address): 0x294ab3200ef36200db84c4128b7f1b4eec71e38a
Arg [4] : _emergency_return (address): 0x294ab3200ef36200db84c4128b7f1b4eec71e38a

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 00000000000000000000000083952e7ab4aca74ca96217d6f8f7591bead6d64e
Arg [1] : 0000000000000000000000000000000000000000000000000000000060acb010
Arg [2] : 000000000000000000000000c38f41a296a4493ff429f1238e030924a1542e50
Arg [3] : 000000000000000000000000294ab3200ef36200db84c4128b7f1b4eec71e38a
Arg [4] : 000000000000000000000000294ab3200ef36200db84c4128b7f1b4eec71e38a


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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