Contract

0x5A537a46D780B1C70138aB98eDce69e7a53177ba

Source Code

Overview

S Balance

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S Value

$0.00

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ContractCreator

0xec4f8607...e782A30EB at txn 0xdf00e38bf95e45eaa4b3ce757d0c6a14ad420f4cd70127eabb7022665e674a35

Multichain Info

$0 (Multichain Portfolio)

Latest 1 from a total of 1 transactions

	Transaction Hash	Method	Block		From		To
	0x59c1c4c387fa8c49dcbf36f5a86deb78fa01170c50c1961c23474f3905b02091	Commit_transfer_...	1583728	2024-12-25 18:09:21	44 days ago	1735150161	0xec4f8607...e782A30EB	IN	0x5A537a46...7a53177ba	0 S$0.00	0.00004627	1

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Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x4656d808...Be84DF0EE
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:

Layer Zero Bridge - Curve DAO Token

Compiler Version

vyper:0.3.10

Optimization Enabled:

N/A

Other Settings:

default evmVersion, MIT license

Contract Source Code (Vyper language format)

IDE

# @version 0.3.10
"""
@title Layer Zero Bridge - Curve DAO Token
@license MIT
@author Curve Finance
"""

interface ERC20:
    def transferFrom(_from: address, _to: address, _value: uint256) -> bool: nonpayable
    def transfer(_to: address, _value: uint256): nonpayable
    def burn(_value: uint256) -> bool: nonpayable

interface LZEndpoint:
    def send(
        _dst_chain_id: uint16,
        _destination: Bytes[40],
        _payload: Bytes[64],
        _refund_address: address,
        _zro_payment_address: address,
        _adapter_params: Bytes[34]
    ): payable
    def estimateFees(
        _dst_chain_id: uint16,
        _user_application: address,
        _payload: Bytes[64],
        _pay_in_zro: bool,
        _adapter_params: Bytes[34]
    ) -> uint256: view

interface Minter:
    def mint(_gauge: address): nonpayable


event BridgeSent:
    receiver: indexed(address)
    amount: uint256

event BridgeReceived:
    receiver: indexed(address)
    amount: uint256

event Delayed:
    nonce: indexed(uint64)
    receiver: indexed(address)
    amount: uint256

event SetPeriod:
    period: uint256

event SetLimit:
    limit: uint256

event SetGasLimit:
    gas_limit: uint256

event SetKilled:
    killed: bool

event TransferOwnership:
    owner: address


TOKEN: public(immutable(address))
MINTER: public(immutable(address))
LZ_ENDPOINT: public(immutable(address))

TOKEN_MIRROR: immutable(address)  # token address on the other side of the bridge
LZ_CHAIN_ID: immutable(uint16)
LZ_ADDRESS: immutable(Bytes[40])
KECCAK_LZ_ADDRESS: immutable(bytes32)


integrate_fraction: public(HashMap[address, uint256])

cache: uint256  # [last timestamp uint64][last available uint192]
limit: public(uint256)
period: public(uint256)

delayed: public(HashMap[uint64, bytes32])

gas_limit: public(uint256)
is_killed: public(bool)

owner: public(address)
future_owner: public(address)


@external
def __init__(
    _period: uint256,
    _limit: uint256,
    _gas_limit: uint256,
    _token: address,
    _minter: address,
    _lz_endpoint: address,
    _token_mirror: address,
    _lz_chain_id: uint16
):
    assert _period != 0

    self.period = _period
    log SetPeriod(_period)

    self.limit = _limit
    log SetLimit(_limit)

    self.gas_limit = _gas_limit
    log SetGasLimit(_gas_limit)

    self.owner = msg.sender
    log TransferOwnership(msg.sender)

    TOKEN = _token
    MINTER = _minter
    LZ_ENDPOINT = _lz_endpoint

    TOKEN_MIRROR = _token_mirror
    LZ_CHAIN_ID = _lz_chain_id
    LZ_ADDRESS = concat(
        slice(convert(self, bytes32), 12, 20), slice(convert(self, bytes32), 12, 20)
    )
    KECCAK_LZ_ADDRESS = keccak256(LZ_ADDRESS)


@payable
@external
def bridge(_receiver: address, _amount: uint256, _refund: address = msg.sender):
    """
    @notice Bridge tokens.
    """
    assert not self.is_killed
    assert _receiver not in [empty(address), TOKEN_MIRROR] and _amount != 0

    assert ERC20(TOKEN).transferFrom(msg.sender, self, _amount)
    assert ERC20(TOKEN).burn(_amount)

    LZEndpoint(LZ_ENDPOINT).send(
        LZ_CHAIN_ID,
        LZ_ADDRESS,
        _abi_encode(_receiver, _amount),
        _refund,
        empty(address),
        concat(b"\x00\x01", convert(self.gas_limit, bytes32)),
        value=msg.value
    )

    log BridgeSent(_receiver, _amount)


@external
def lzReceive(_lz_chain_id: uint16, _lz_address: Bytes[40], _nonce: uint64, _payload: Bytes[64]):
    assert msg.sender == LZ_ENDPOINT

    assert _lz_chain_id == LZ_CHAIN_ID
    assert keccak256(_lz_address) == KECCAK_LZ_ADDRESS

    receiver: address = empty(address)
    amount: uint256 = empty(uint256)
    receiver, amount = _abi_decode(_payload, (address, uint256))

    if receiver in [empty(address), TOKEN] or amount == 0:
        # safeguard
        return

    limit: uint256 = self.limit

    if self.is_killed or amount > limit:
        self.delayed[_nonce] = keccak256(_abi_encode(block.timestamp, receiver, amount))
        log Delayed(_nonce, receiver, amount)
        return

    cache: uint256 = self.cache
    ts: uint256 = cache >> 192
    available: uint256 = cache & convert(max_value(uint192), uint256)

    period: uint256 = self.period

    if period <= (block.timestamp - ts):
        available = limit
    else:
        # regenerate amount which is available to mint at a rate of (limit / period)
        available = min(available + (limit * (block.timestamp - ts) / period), limit)

    if amount > available:
        remainder: uint256 = amount - available
        amount = available
        available = 0

        # delay the remainder
        self.delayed[_nonce] = keccak256(_abi_encode(block.timestamp, receiver, remainder))
        log Delayed(_nonce, receiver, remainder)
    else:
        available -= amount

    self.cache = (block.timestamp << 192) + available

    if amount != 0:
        self.integrate_fraction[self] += amount

        Minter(MINTER).mint(self)
        ERC20(TOKEN).transfer(receiver, amount)
        log BridgeReceived(receiver, amount)


@external
def retry(_nonce: uint64, _timestamp: uint256, _receiver: address, _amount: uint256):
    """
    @notice Retry a delayed bridge attempt.
    """
    assert not self.is_killed or msg.sender == self.owner
    assert self.delayed[_nonce] == keccak256(_abi_encode(_timestamp, _receiver, _amount))

    self.delayed[_nonce] = empty(bytes32)

    period: uint256 = self.period
    assert block.timestamp >= _timestamp + period

    cache: uint256 = self.cache
    ts: uint256 = cache >> 192
    available: uint256 = cache & convert(max_value(uint192), uint256)

    limit: uint256 = self.limit

    if period <= (block.timestamp - ts):
        available = limit
    else:
        available = min(available + (limit * (block.timestamp - ts) / period), limit)

    amount: uint256 = _amount
    if amount > available:
        remainder: uint256 = amount - available
        amount = available
        available = 0

        # delay the remainder with the waiting period removed
        self.delayed[_nonce] = keccak256(_abi_encode(_timestamp, _receiver, remainder))
        log Delayed(_nonce, _receiver, remainder)
    else:
        available -= amount

    self.cache = (block.timestamp << 192) + available

    if amount != 0:
        self.integrate_fraction[self] += amount

        Minter(MINTER).mint(self)
        ERC20(TOKEN).transfer(_receiver, amount)
        log BridgeReceived(_receiver, amount)


@view
@external
def quote() -> uint256:
    """
    @notice Quote the cost to bridge tokens.
    """
    return LZEndpoint(LZ_ENDPOINT).estimateFees(
        LZ_CHAIN_ID,
        self,
        _abi_encode(self, block.timestamp),
        False,
        concat(b"\x00\x01", convert(self.gas_limit, bytes32)),
    )


@view
@external
def available() -> uint256:
    """
    @notice Query the available amount this bridge can currently mint.
    """
    cache: uint256 = self.cache
    ts: uint256 = cache >> 192
    available: uint256 = cache & convert(max_value(uint192), uint256)

    limit: uint256 = self.limit
    period: uint256 = self.period

    if period <= (block.timestamp - ts):
        available = limit
    else:
        # regenerate amount which is available to mint at a rate of (limit / period)
        available = min(available + (limit * (block.timestamp - ts) / period), limit)

    return available


@external
def user_checkpoint(_user: address) -> bool:
    return True


@external
def set_period(_period: uint256):
    """
    @notice Set the bridge limit period.
    """
    assert msg.sender == self.owner
    assert _period != 0

    self.period = _period
    log SetPeriod(_period)


@external
def set_limit(_limit: uint256):
    """
    @notice Set the bridge limit.
    """
    assert msg.sender == self.owner

    self.limit = _limit
    log SetLimit(_limit)


@external
def set_gas_limit(_gas_limit: uint256):
    """
    @notice Set the gas limit for bridge execution.
    """
    assert msg.sender == self.owner

    self.gas_limit = _gas_limit
    log SetGasLimit(_gas_limit)


@external
def set_killed(_killed: bool):
    assert msg.sender == self.owner

    self.is_killed = _killed
    log SetKilled(_killed)


@external
def commit_transfer_ownership(_future_owner: address):
    """
    @notice Transfer ownership to `_future_owner`
    @param _future_owner The account to commit as the future owner
    """
    assert msg.sender == self.owner  # dev: only owner

    self.future_owner = _future_owner


@external
def accept_transfer_ownership():
    """
    @notice Accept the transfer of ownership
    @dev Only the committed future owner can call this function
    """
    assert msg.sender == self.future_owner  # dev: only future owner

    self.owner = msg.sender
    log TransferOwnership(msg.sender)

Contract Security Audit

No Contract Security Audit Submitted- Submit Audit Here

Contract ABI

[{"name":"BridgeSent","inputs":[{"name":"receiver","type":"address","indexed":true},{"name":"amount","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"BridgeReceived","inputs":[{"name":"receiver","type":"address","indexed":true},{"name":"amount","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"Delayed","inputs":[{"name":"nonce","type":"uint64","indexed":true},{"name":"receiver","type":"address","indexed":true},{"name":"amount","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetPeriod","inputs":[{"name":"period","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetLimit","inputs":[{"name":"limit","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetGasLimit","inputs":[{"name":"gas_limit","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"SetKilled","inputs":[{"name":"killed","type":"bool","indexed":false}],"anonymous":false,"type":"event"},{"name":"TransferOwnership","inputs":[{"name":"owner","type":"address","indexed":false}],"anonymous":false,"type":"event"},{"stateMutability":"nonpayable","type":"constructor","inputs":[{"name":"_period","type":"uint256"},{"name":"_limit","type":"uint256"},{"name":"_gas_limit","type":"uint256"},{"name":"_token","type":"address"},{"name":"_minter","type":"address"},{"name":"_lz_endpoint","type":"address"},{"name":"_token_mirror","type":"address"},{"name":"_lz_chain_id","type":"uint16"}],"outputs":[]},{"stateMutability":"payable","type":"function","name":"bridge","inputs":[{"name":"_receiver","type":"address"},{"name":"_amount","type":"uint256"}],"outputs":[]},{"stateMutability":"payable","type":"function","name":"bridge","inputs":[{"name":"_receiver","type":"address"},{"name":"_amount","type":"uint256"},{"name":"_refund","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"lzReceive","inputs":[{"name":"_lz_chain_id","type":"uint16"},{"name":"_lz_address","type":"bytes"},{"name":"_nonce","type":"uint64"},{"name":"_payload","type":"bytes"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"retry","inputs":[{"name":"_nonce","type":"uint64"},{"name":"_timestamp","type":"uint256"},{"name":"_receiver","type":"address"},{"name":"_amount","type":"uint256"}],"outputs":[]},{"stateMutability":"view","type":"function","name":"quote","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"available","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"nonpayable","type":"function","name":"user_checkpoint","inputs":[{"name":"_user","type":"address"}],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"nonpayable","type":"function","name":"set_period","inputs":[{"name":"_period","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"set_limit","inputs":[{"name":"_limit","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"set_gas_limit","inputs":[{"name":"_gas_limit","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"set_killed","inputs":[{"name":"_killed","type":"bool"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"commit_transfer_ownership","inputs":[{"name":"_future_owner","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"accept_transfer_ownership","inputs":[],"outputs":[]},{"stateMutability":"view","type":"function","name":"TOKEN","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"MINTER","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"LZ_ENDPOINT","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"integrate_fraction","inputs":[{"name":"arg0","type":"address"}],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"limit","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"period","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"delayed","inputs":[{"name":"arg0","type":"uint64"}],"outputs":[{"name":"","type":"bytes32"}]},{"stateMutability":"view","type":"function","name":"gas_limit","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"is_killed","inputs":[],"outputs":[{"name":"","type":"bool"}]},{"stateMutability":"view","type":"function","name":"owner","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"future_owner","inputs":[],"outputs":[{"name":"","type":"address"}]}]

Deployed Bytecode

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