B

[Ethereum Smart]

B

[Praetorian.1legion]

But if you made your current based on the Standard ERC223 The problem of lost tokens. Sometimes people mistakenly can send tokens to an address that is a contract. In this case, the contract will become the owner of the tokens. And, if the contract does not provide for an explicit possibility of working with transfer, then the tokens will remain at the address of the contract forever. The ERC223 standard introduces an interface for contracts that want to work with tokens. In this interface there is a tokenFallback function, it should be called when trying to send tokens to the contract.
When you perform a transaction using transfer, you need to add additional information. In ERC223, an additional transfer method is added which contains the data field - specifically for the transfer of additional information. At the same time, the old transfer method was left for backwards compatibility.