    deposit_amount = 1000 * 10**18
    get_token(dai, user, deposit_amount*3)
    get_token(vader, user, deposit_amount*3)
    dai.functions.approve(pool.address, deposit_amount*3).transact()
    link.functions.approve(pool.address, deposit_amount*3).transact()


    # deposit_amount = 1000 * 10**18

    # # first deposit 1 wei Dai and 1 vader to the pool
    router.functions.addLiquidity(dai.address, vader.address, 1, 10**18, user, 10**18).transact()
    print('received liquidity', pool.functions.positions(0).call()[2])
    # output log:
    # 1000000000000000000

    # normally deposit to the pool
    router.functions.addLiquidity(dai.address, vader.address, deposit_amount, deposit_amount, user, 10**18).transact()
    print('received liquidity', pool.functions.positions(1).call()[2])

    # output log:
    # 500000000000000000500000000000000000000

    # no one can deposit to the pool now
    # there would be revert

    router.functions.addLiquidity(dai.address, vader.address, 1, deposit_amount, user, 10**18).transact()
    ((totalPoolUnits * poolUnitFactor) / denominator) * slip
