Yape challenge

Yape challenge repository. I hope you enjoy this code review!

Introducción

Tech stack:

1. GraphQl API for incoming requests.
2. NodeJs with NestJs framework for microservices.
3. Postgress DB.
4. Redis DB.
5. Docker and Docker Compose.
6. Turborepo as monorepo tool.

Local stack deployment

1. Run in root folder and each service folder: cp .env.example .env.
2. You can configure environment variables in each .env if is needed. Please, don't modify APP_ENV=local value.
3. Run docker compose up
4. Run npm install
5. Run npm run start:prod

Workflow

In order to create and get a transaction:

1. Import in your postman workspace ./docs/Transactions.postman_collection.json
2. Run createTransaction which is in Create Transaction on the imported collection. This mutation will start transaction creation. It will retrive the task and some useful information.
3. Copy data.createTransaction.id and set it in transactionTask which is in Query Transaction and run it then. As long polling pattern, you will receive the task with three important properties:
   • status: Task status (pending, completed).
   • retryAfter: Time in seconds to retry if the task has not ended.
   • retryTimes: Retry times before considering the task as not found.
   • result: The result of the task when it be completed. The completed transaction in this case.

You can check the stack and the process here:

Disclaimers

Some important developments are pendings:

1. Handle microservices errors
2. Master-slave pattern on Postgres

Some other development details could be missing due to lack of time.

Thanks for your time!