ripple-lib | JavaScript API for interacting with the XRP Ledger | REST library

ripple-lib is using certain dependencies, that use node.js specific or globally available modules and access them via require or directly from global context. In reality, NativeScript environment is different from both node.js and browser, so we have to make sure all dependencies are met and are available to run in {N} environment.

For many use-cases nativescript-nodeify plugin does the job, but case of using ripple-lib, it does not resolve the issue so we have to take care of compatibilities manually:

1) ripple-lib's dependency bignumber.js is using native node library crypto. Since it is not available in {N} runtime, we have to use specially designed module nativescript-randombytes and make it accessible globally with webpack's providePlugin:

1. Add NativeScript plugin to the project:

I think you should return the promise at

You really don't want to mix asynchronous operations that return a promise with those that take a direct callback. It's hard to write good robust code when mixing like that. So, since you are already using with promises in a number of operations, it's best to take the remaining async operations and "promisify" them so you can use them with promises. Then, you can take advantage of all the clean error propagation and chaining of promises.

Then, secondly, you have to make sure all your asynchronous operations in a loop are properly chained to the parent promise. To do that here, we will accumulate the promises from getAccount() in the loop into an array of promises. Then, after the loop, we can tell when they're all done using Promise.all() and then return that promise from readdir() so that they will all be properly chained to the parent promise.

This will then make sure everything inside the loop finishes before the parent resolves and before you call api.disconnect().

Here's what that would look like: