Contract Source Code (Vyper language format)

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# @version 0.3.10

"""
@title droplet faucet
@author CopyPaste
@license GNU Affero General Public License v3.0
@notice An auction house for Droplet NFTs
"""

from vyper.interfaces import ERC721
from vyper.interfaces import ERC20

################################################################
#                        INTERFACES                            #
################################################################
interface Droplet:
    def mint(reciever: address) -> uint256: nonpayable
    def totalSupply() -> uint256: view

interface BLAST:
    def configureClaimableGas(): nonpayable
    def configureClaimableYield(): nonpayable
    def claimAllYield(contractAddress: address, recipientOfYield: address) -> uint256: nonpayable
    def claimAllGas(contractAddress: address, recipientOfGas: address) -> uint256: nonpayable

interface IBLASTPointsOperator:
    def configurePointsOperator(op: address): nonpayable

blast: constant(address) = 0x4300000000000000000000000000000000000002

################################################################
#                            EVENTS                            #
################################################################
event Started:
    dropletId: indexed(uint256)
    startTime: indexed(uint256)
    endTime: indexed(uint256)

event Bid:
    bidder: indexed(address)
    amount: indexed(uint256)
    auction: uint256

event Extended:
    endTime: indexed(uint256)
    newTopBid: indexed(uint256)

event Settled:
    auction: uint256
    winner: indexed(address)
    amount: indexed(uint256)

################################################################
#                           STORAGE                            #
################################################################
struct Auction:
    # @dev The id of the droplet being auctioned
    dropletId: uint256
    # @dev The amount of the top bid
    amount: uint256
    # @dev The time the auction started
    start_time: uint256
    # @dev The time the auction ends
    end_time: uint256
    # @dev The address of the top bidder, payable in Ether
    bidder: address
    settled: bool

auction: public(Auction)
last_settled_auction: public(uint256)

drip_token: public(immutable(ERC20))
droplet: public(immutable(address))

dao: public(address)
dao_treasure: public(uint256)

GENESIS: public(immutable(uint256))
FREE_FLOW_DURATION: public(constant(uint256)) = 50 * 86400 # 50 days

@external
def __init__(_droplet: address, _drip: address, _dao: address):
    droplet = _droplet
    drip_token = ERC20(_drip)
    self.dao = _dao

    GENESIS = block.timestamp

    self.auction.settled = True

    BLAST(0x4300000000000000000000000000000000000002).configureClaimableGas()
    BLAST(0x4300000000000000000000000000000000000002).configureClaimableYield()

    IBLASTPointsOperator(0x2536FE9ab3F511540F2f9e2eC2A805005C3Dd800).configurePointsOperator(0x3f2e5ED8d1Ff052553b0837d5eC7ceca952C19Cd)

@external
def migrate_dao(new_dao: address):
    assert msg.sender == self.dao, "NOT OWNER"
    self.dao = new_dao

@external
def claim_money(account: address):
    assert msg.sender == self.dao, "NOT OWNER"

    BLAST(0x4300000000000000000000000000000000000002).claimAllYield(self, account)
    BLAST(0x4300000000000000000000000000000000000002).claimAllGas(self, account)


@external
def dao_claim(account: address, _ether: uint256):
    assert msg.sender == self.dao, "NOT OWNER"
    send(account, _ether)


################################################################
#                           AUCTION                            #
################################################################

@internal
def start_auction():
    droplet_id: uint256 = Droplet(droplet).mint(self)

    start_time: uint256 = block.timestamp
    end_time: uint256 = start_time + 86400

    self.auction = Auction({
        dropletId: droplet_id,
        amount: 0, # Minimum Bid Constant?
        start_time: start_time,
        end_time: end_time,
        bidder: empty(address),
        settled: False
    })

    log Started(droplet_id, start_time, end_time)

@external
def start_next_auction():
    if not self.auction.settled:
        self._settle_auction()
    assert self.auction.settled, "Auction not settled"
    if GENESIS + FREE_FLOW_DURATION > block.timestamp:
        self.start_auction()
    else:
        assert self.last_settled_auction + (86400 * 3) < block.timestamp, "Faucet is on cooldown"
        time_since: uint256 = block.timestamp - self.last_settled_auction

        price: uint256 = 33000 * 10 ** 18
        if time_since > 86400 * 5:
            price = 15000 * 10 ** 18

        if time_since > 86400 * 7:
            price = 7500 * 10 ** 18

        if time_since > 86400 * 10:
            price = 0

        if price > 0:
            drip_token.transferFrom(msg.sender, self, price)

        self.start_auction()

@payable
@external
def bid(droplet_id: uint256):
    """
        @param droplet_id Not completely neccessary but ensures bid arrives on time
            for the right auction
    """
    _auction: Auction = self.auction

    assert _auction.end_time > block.timestamp, "Auction has ended"
    assert _auction.dropletId == droplet_id, "Droplet ID mismatch"
    # Must bid atleast last price + 5%
    assert (_auction.amount * 105) / 100 < msg.value, "Bid too low"

    lastBidder: address = _auction.bidder

    if lastBidder != empty(address):
        success: bool = raw_call(
            lastBidder,
            b"",
            gas=2300,
            value=_auction.amount,
            revert_on_failure=False
        )

    self.auction.amount = msg.value
    self.auction.bidder = msg.sender

    # Extend the auction if it's within the last 5 minutes
    if _auction.end_time - block.timestamp < 5 * 60:
        self.auction.end_time += 5 * 60

        log Extended(_auction.end_time + (5*60), msg.value)

    log Bid(msg.sender, msg.value, droplet_id)

@internal
def _settle_auction():
    _auction: Auction = self.auction

    assert _auction.end_time < block.timestamp, "DropletFaucet: Auction has not ended"
    assert not _auction.settled, "DropletFaucet: Auction already settled"

    if _auction.bidder == empty(address):
        # If no one bid, simply restart the auction, as the auction is not settled
        start_time: uint256 = block.timestamp
        end_time: uint256 = start_time + 86400

        self.auction = Auction({
            dropletId: _auction.dropletId,
            amount: 0, # Minimum Bid Constant?
            start_time: start_time,
            end_time: end_time,
            bidder: empty(address),
            settled: False
        })

        log Started(_auction.dropletId, start_time, end_time)
        return

    # DAO takes 100% of proceeds
    self.dao_treasure += _auction.amount

    # NOTE - `auction` is a storage variable reference, not `_auction` above which is in memory
    self.auction.settled = True
    self.last_settled_auction = block.timestamp

    # Send the NFT to the winner
    ERC721(droplet).transferFrom(self, _auction.bidder, _auction.dropletId)

    log Settled(_auction.dropletId, _auction.bidder, _auction.amount)

@external
def settle_auction():
    self._settle_auction()

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[{"name":"Started","inputs":[{"name":"dropletId","type":"uint256","indexed":true},{"name":"startTime","type":"uint256","indexed":true},{"name":"endTime","type":"uint256","indexed":true}],"anonymous":false,"type":"event"},{"name":"Bid","inputs":[{"name":"bidder","type":"address","indexed":true},{"name":"amount","type":"uint256","indexed":true},{"name":"auction","type":"uint256","indexed":false}],"anonymous":false,"type":"event"},{"name":"Extended","inputs":[{"name":"endTime","type":"uint256","indexed":true},{"name":"newTopBid","type":"uint256","indexed":true}],"anonymous":false,"type":"event"},{"name":"Settled","inputs":[{"name":"auction","type":"uint256","indexed":false},{"name":"winner","type":"address","indexed":true},{"name":"amount","type":"uint256","indexed":true}],"anonymous":false,"type":"event"},{"stateMutability":"nonpayable","type":"constructor","inputs":[{"name":"_droplet","type":"address"},{"name":"_drip","type":"address"},{"name":"_dao","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"migrate_dao","inputs":[{"name":"new_dao","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"claim_money","inputs":[{"name":"account","type":"address"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"dao_claim","inputs":[{"name":"account","type":"address"},{"name":"_ether","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"start_next_auction","inputs":[],"outputs":[]},{"stateMutability":"payable","type":"function","name":"bid","inputs":[{"name":"droplet_id","type":"uint256"}],"outputs":[]},{"stateMutability":"nonpayable","type":"function","name":"settle_auction","inputs":[],"outputs":[]},{"stateMutability":"view","type":"function","name":"auction","inputs":[],"outputs":[{"name":"","type":"tuple","components":[{"name":"dropletId","type":"uint256"},{"name":"amount","type":"uint256"},{"name":"start_time","type":"uint256"},{"name":"end_time","type":"uint256"},{"name":"bidder","type":"address"},{"name":"settled","type":"bool"}]}]},{"stateMutability":"view","type":"function","name":"last_settled_auction","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"drip_token","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"droplet","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"dao","inputs":[],"outputs":[{"name":"","type":"address"}]},{"stateMutability":"view","type":"function","name":"dao_treasure","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"GENESIS","inputs":[],"outputs":[{"name":"","type":"uint256"}]},{"stateMutability":"view","type":"function","name":"FREE_FLOW_DURATION","inputs":[],"outputs":[{"name":"","type":"uint256"}]}]

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00000000000000000000000057b57471ec1ba3e76c0b0a64248c2f37307056de000000000000000000000000ee9acf533d1545ab82f4dd635a9dc8916ef41cbd0000000000000000000000003f2e5ed8d1ff052553b0837d5ec7ceca952c19cd

-----Decoded View---------------
Arg [0] : _droplet (address): 0x57B57471ec1bA3e76c0B0a64248C2F37307056DE
Arg [1] : _drip (address): 0xEe9aCF533d1545aB82f4DD635A9Dc8916eF41CBD
Arg [2] : _dao (address): 0x3f2e5ED8d1Ff052553b0837d5eC7ceca952C19Cd

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000057b57471ec1ba3e76c0b0a64248c2f37307056de
Arg [1] : 000000000000000000000000ee9acf533d1545ab82f4dd635a9dc8916ef41cbd
Arg [2] : 0000000000000000000000003f2e5ed8d1ff052553b0837d5ec7ceca952c19cd