def tend_with_dai(mcd: DssDeployment, c: Collateral, flipper: Flipper, id: int, address: Address, bid: Rad):
assert (isinstance(mcd, DssDeployment))
assert (isinstance(c, Collateral))
assert (isinstance(flipper, Flipper))
assert (isinstance(id, int))
assert (isinstance(bid, Rad))
flipper.approve(flipper.vat(), approval_function=hope_directly(from_address=address))
previous_bid = flipper.bids(id)
c.approve(address)
reserve_dai(mcd, c, address, Wad(bid), extra_collateral=Wad.from_number(2))
TestAuctionKeeperFlipper.tend(flipper, id, address, previous_bid.lot, bid)
def dent(flipper: Flipper, id: int, address: Address, lot: Wad, bid: Rad):
assert (isinstance(flipper, Flipper))
assert (isinstance(id, int))
assert (isinstance(lot, Wad))
assert (isinstance(bid, Rad))
current_bid = flipper.bids(id)
assert current_bid.guy != Address("0x0000000000000000000000000000000000000000")
assert current_bid.tic > datetime.now().timestamp() or current_bid.tic == 0
assert current_bid.end > datetime.now().timestamp()
assert bid == current_bid.bid
assert bid == current_bid.tab
assert lot < current_bid.lot
assert flipper.beg() * lot <= current_bid.lot
assert flipper.dent(id, lot, bid).transact(from_address=address)
