SpenDesk: Backend Test

Before doing anything, I would like to mention that I didn't complete the whole thing due to lack of time. So I haven't implemented the transfer protocol with the master wallet or the load unload money into a card last but not least I haven't done any tests either but I would have used mocha, chai, chai-http and sinon to name a few.

Note:

With more time I would have completed the whole test obviously plus "dockerizing" it properly. I think linking those microservices with an event bus system such as rabbitMQ or zeroMQ would be interesting as well and probably use Redis for caching data and faster process.

Gateway Microservice is an API gateway behind a GraphQL layer I thought that would be a good fit for this kind of project as it comes with playground which plays multiple roles (documentation and an interface for testing APIs)

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MongoDB

In order to make this working properly you must have mongodb installed locally.

Useful links:

• https://zellwk.com/blog/install-mongodb/
• https://zellwk.com/blog/local-mongodb/

Once you have installed correctly your mongodb on you machine run the following command:

mongod --dbpath /System/Volumes/Data/data/db

Dependencies

Simply run yarn at the root of the project, it should install all the required dependencies accross packages.

Run the "Thing"

Now, you have install all the dependencies and mongodb, you can launch the beast.

Again be sure you are at the root of the project and simply run this command.

yarn start

Once you have launched all the services you can go to localhost:4000/graphql. There you can explore available APIs.

1. once you have graphql up and running you should create your first user by using the mutation createUser
2. once your first user is created you can create a wallet createWallet needs the user_id and a currency <'EUR', 'USD', 'GPB'>
3. now you can create your card createCard needs a wallet_id and a currency <'EUR', 'USD', 'GPB'>

Microservices

Card

Available API:

• createCard - create a card
• blockCard - block a card
• getCardById - return a card by it's card_id

User

Available API:

• getUsers - return a list of users
• getUserById - return a user by it's user_id
• createUser - create a user

Wallet

Available API:

• createWallet - create a wallet
• getWallets - return a list of wallets

Gateway

All of the above.

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