How two handle errors in async calls in swift combine?

Using Swift
,
1

How to handle two async API responses using combine?

I have two async calls to fetch data from the server, but I want them to handle them as a single response, also want to handle errors for each response.
Here I have two methods m1(), m2() each can throw different types of errors.

Wants to wait to get a response of both and show an error message based on its error type. If there is no error, continue with the flow. Which operator do we have to use? I tried with Publishers.Zip & Publishers. Map not able to handle errors.

import Combine
enum Error1: Error {
    case e1
}

enum Error2: Error {
    case e2
}

func m1() -> Future<Bool, Error1> {
    return Future { promise in
        DispatchQueue.main.asyncAfter(deadline: .now() + 2) {
            promise(.failure(.e1))
        }
    }
}

func m2() -> Future<String, Error2> {
    return Future { promise in
        DispatchQueue.main.asyncAfter(deadline: .now() + 3) {
            promise(.success("1"))
        }
    }
}

Help would be greatly appreciated.!! Thank you.

2

You need to type-erase the error types of m1() and m2() to Error so that they have the same error type, or wrap Error1 and Error2 in another enum that conforms to Error. You can't combine publishers with different error types.