Contract Source Code (Vyper language format)

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# @version 0.3.0
"""
@title avToken Burner
@notice Converts avToken lending coins to USDC
"""

from vyper.interfaces import ERC20


interface LendingPool:
    def withdraw(_underlying_asset: address, _amount: uint256, _receiver: address): nonpayable

interface RegistrySwap:
    def exchange_with_best_rate(
        _from: address,
        _to: address,
        _amount: uint256,
        _expected: uint256,
        _receiver: address,
    ) -> uint256: payable

interface AddressProvider:
    def get_address(_id: uint256) -> address: view


receiver: public(address)
is_killed: public(bool)

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

is_approved: HashMap[address, HashMap[address, bool]]

ADDRESS_PROVIDER: constant(address) = 0x0000000022D53366457F9d5E68Ec105046FC4383
AAVE_LENDING_POOL: constant(address) = 0x4F01AeD16D97E3aB5ab2B501154DC9bb0F1A5A2C

AVUSDC: constant(address) = 0x46A51127C3ce23fb7AB1DE06226147F446e4a857
USDC: constant(address) = 0xA7D7079b0FEaD91F3e65f86E8915Cb59c1a4C664


@external
def __init__(_receiver: address, _owner: address):
    """
    @notice Contract constructor
    @param _receiver Address that converted tokens are transferred to.
                     Should be set to the `ChildBurner` deployment.
    @param _owner Owner address. Can kill the contract and recover tokens.
    """
    self.receiver = _receiver
    self.owner = _owner


@external
def burn(_coin: address) -> bool:
    """
    @notice Unwrap `_coin` and transfer to the receiver
    @param _coin Address of the coin being unwrapped
    @return bool success
    """
    assert not self.is_killed  # dev: is killed

    # transfer coins from caller
    amount: uint256 = ERC20(_coin).balanceOf(msg.sender)
    ERC20(_coin).transferFrom(msg.sender, self, amount)

    # get actual balance in case of transfer fee or pre-existing balance
    amount = ERC20(_coin).balanceOf(self)

    if _coin != AVUSDC:
        registry_swap: address = AddressProvider(ADDRESS_PROVIDER).get_address(2)
        if not self.is_approved[registry_swap][_coin]:
            ERC20(_coin).approve(registry_swap, MAX_UINT256)
            self.is_approved[registry_swap][_coin] = True

        RegistrySwap(registry_swap).exchange_with_best_rate(_coin, AVUSDC, amount, 0, self)
        amount = ERC20(AVUSDC).balanceOf(self)

    LendingPool(AAVE_LENDING_POOL).withdraw(USDC, amount, self.receiver)

    return True


@external
def recover_balance(_coin: address) -> bool:
    """
    @notice Recover ERC20 tokens from this contract
    @param _coin Token address
    @return bool success
    """
    assert msg.sender == self.owner  # dev: only owner

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

    return True


@external
def set_receiver(_receiver: address):
    assert msg.sender == self.owner
    self.receiver = _receiver


@external
def set_killed(_is_killed: bool) -> bool:
    """
    @notice Set killed status for this contract
    @dev When killed, the `burn` function cannot be called
    @param _is_killed Killed status
    @return bool success
    """
    assert msg.sender == self.owner  # dev: only owner
    self.is_killed = _is_killed

    return True


@external
def commit_transfer_ownership(_future_owner: address) -> bool:
    """
    @notice Commit a transfer of ownership
    @dev Must be accepted by the new owner via `accept_transfer_ownership`
    @param _future_owner New owner address
    @return bool success
    """
    assert msg.sender == self.owner  # dev: only owner
    self.future_owner = _future_owner

    return True


@external
def accept_transfer_ownership() -> bool:
    """
    @notice Accept a transfer of ownership
    @return bool success
    """
    assert msg.sender == self.future_owner  # dev: only owner
    self.owner = msg.sender

    return True

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000000000000000000000000b324dc1780c0a2e8d84ed40b95aadf4693bc6c750000000000000000000000007eeac6cddbd1d0b8af061742d41877d7f707289a

-----Decoded View---------------
Arg [0] : _receiver (address): 0xB324dc1780c0A2e8D84eD40B95aAdf4693bc6C75
Arg [1] : _owner (address): 0x7EeAC6CDdbd1D0B8aF061742D41877D7F707289a

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000b324dc1780c0a2e8d84ed40b95aadf4693bc6c75
Arg [1] : 0000000000000000000000007eeac6cddbd1d0b8af061742d41877d7f707289a