compose-promises.js

export const composePromise = (...fns) => initialValue =>
    fns.reduceRight((res, fn) => Promise.resolve(res).then(fn), initialValue);

// Individual Promises
const saveAppFee = () => saveFees(a, b, c);
const saveLnpFee = () => saveFees(x, y, z);

// Composed Promises
const saveAppAndLnp = composePromise(saveAppFee, saveLnpFee);
const saveApp = composePromise(saveAppFee);
const saveLnp = composePromise(saveLnpFee);

// Add logic to return proper set of promises.
const determineFeeCalls = (shouldCallA, shouldCallB) => {
    if (shouldCallA && shouldCallB) {
        return saveAppAndLnp;
    } else if (shouldCallA) {
        return saveApp;
    } else if (shouldCallB) {
        return saveLnp;
    }
};

// Your condition here...
const shouldCallAppFee = true;
const shouldCallLnPFee = false;

// Call using currying
determineFeeCalls(shouldCallAppFee, shouldCallLnPFee)()
    .then(() => {
        history.push(`${Constants.BASE_PATH}/payment/license-summary-preview`);
    })
    .catch(err => {
        hideSpinner();
        // error handling here
    });