update-extended-example.js

const getContactById = contactId => fetch(`https://jsonplaceholder.typicode.com/contacts/${contact.id}`);

const setContactData = (data, state) => {
    data.fullName = `${data.firstName} ${data.lastName}`
    return {
        currentContact: data,
        actionSuccess: true,
        masterContactAlert: data.contactId === state.masterContact.id
    }
};

export const getContactById = asyncUpdate("getContactById", getContactById, setContactData);