Interface overriding giving error. Overriding public state variable return types differ [duplicate]

Question

I am trying to import interface in it's contract and overriding function. But 1 mapping is giving error.

Error:

Overriding public state variable return types differ.

Interface:

interface IPassCurrencies {
    function currencyMapping(uint128 currencyIndex)
        external
        view
        returns (PLibrary.CurrencyInfo memory);

}

Contract:

contract Currencies is Ownable, ReentrancyGuard, IPassCurrencies {
    mapping(uint128 => PLibrary.CurrencyInfo)
        public
        override currencyMapping; // Error Here
        ....
}

Any idea where I am wrong?

Answer 1

You need to decouple your struct, try something like this:

function currencyMapping(uint128 currencyIndex)
        external
        view
        returns (address addr, uint8 decimals);

Assuming you struct is as follow:

struct CurrencyInfo {
  address addr,
  uint8 decimals
}