You need to make sure that the next Croesus contract deployed by the CroesusFactory already has a strictly positive at its address.
- The exercise serves to show that it is possible to send Ether to a contract before it is even deployed.
- In effect, there is no way to know that any address you see on Etherscan is not the address of a future contract.
- Additionally, it shows that the future address can be calculated beforehand.
- An additional complication is that the future address has to be computed with the factory's address.