GitHub API pagination with RxJS

getAllCommits$.js

const GitHubApi = require("github");
const Rx = require("rx");

const github = new GitHubApi();

const getCommitsAsync = (param) => github.repos.getCommits({
    owner: 'amowu',
    repo: 'test-semantic-release',
    ...param
});

const checkNextPage = (response) =>
    github.hasNextPage(response)
        ? Rx.Observable.fromPromise(github.getNextPage(response))
        : Rx.Observable.empty();

const concatAllCommits = (acc, curr) => acc.concat(curr.data);

const getAllCommits$ = Rx.Observable
    .fromPromise(getCommitsAsync({ per_page: 100 }))
    .expand(checkNextPage)
    .reduce(concatAllCommits, []);
    
// getAllCommits$.subscribe(
//     (commits) => console.log(commits)
// );

const commits = await getAllCommits$.toPromise();