deposit_amount = 100000 * 10**18
user = w3.eth.accounts[0]
get_token(dai, user, deposit_amount)
dai.functions.approve(vault.address, deposit_amount + margin_deposit).transact()
vault.functions.deposit(dai.address, deposit_amount).transact()
vault.functions.withdrawAll(usdt.address).transact()

#
print("usdt amount: ", usdt.functions.balanceOf(user).call())
