Transaction Management Frontend - Level 3

Your task is to build an transaction management application frontend that:

1. Integrates with the provided Transaction Management API to create and show transaction/account data.
2. Makes the provided E2E tests pass.

Please agree with your hiring team regarding the tech stack choice.

What you should build

You are required to implement an application that allows to record financial transactions and view the transaction history. The app consists of a form for submitting transactions and a transaction list.

Transaction list displays the withdrawn or deposited amount for each transaction along with the affected account id. It also shows the current balance for the last submitted transaction.

Here's the UI mockup with hints:

Feel free to tweak the UI, but please ensure that the following HTML is in place.

The form for submitting transactions

<form ... >
  <input data-type="account-id" ... />
  <input data-type="amount" ... />
  <input data-type="transaction-submit" type="submit" ... />
</form>

Both input fields should be cleared after the form is submitted.

Transactions list

Every newly submitted transaction should go on the top of the list and should have an enclosing <div /> with the following structure:

<div
  data-type="transaction"
  data-account-id="${transaction-account-id}"
  data-amount="${transaction-amount}"
  data-balance="${current-account-balance}" ...>
  ...
</div>

• ${transaction-account-id} - account id of the corresponding transaction.
• ${transaction-amount} - transaction amount.
• ${current-account-balance} - the current account balance right after submitting the transaction (only show for the last submitted transaction).

Before you get started

Get familiar with the API

Request examples

Get transactions history

GET https://infra.devskills.app/api/accounting/transactions

Create a new transaction

POST https://infra.devskills.app/api/accounting/transactions
Content-Type: application/json

{
  "account_id": "0afd02d3-6c59-46e7-b7bc-893c5e0b7ac2",
  "amount": 7
}

Get a transaction by id

GET https://infra.devskills.app/api/accounting/transactions/7c94635a-40a3-4c87-888a-42c3ce5b9750

Get an account by id

GET https://infra.devskills.app/api/accounting/accounts/0afd02d3-6c59-46e7-b7bc-893c5e0b7ac2

Try running the E2E tests locally

npm install
# Run your app here
npm run test

What we expect from you

1. Make the provided E2E tests pass.
2. Implement client-side validation of the form data.
3. Implement error handling for the cases when the API cannot be reached or returns a server error.
4. Ensure that the app remains responsive (i.e. doesn't block the UI) while the data is being loaded.
5. Unit test one module of choice. There is no need to test the whole app, as we only want to understand what you take into consideration when writing unit tests.
6. Avoid duplication and extract re-usable modules where it makes sense. We want to see your approach to creating a codebase that is easy to maintain.
7. Push your code to the new implementation branch. We encourage you to commit and push your changes regularly as it's a good way for you to showcase your thinking process.
8. Create a new pull request, but please do not merge it.
9. Await further instructions from the hiring team.

Time estimate

About 3 hours depending on your experience level.

Also, there is no countdown. The estimate is for you to plan your time.