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Transaction Processor

A Node.js application for processing transactions from CSV files with a RESTful API.

Features

  • Upload CSV files containing transaction data
  • Process transactions and categorize them into accounts and cards
  • Identify and store bad transactions (transactions with missing fields)
  • Retrieve accounts, cards, and bad transactions via API endpoints
  • Reset the system to clear all data
  • Secure APIs with CORS and API keys
  • Pagination for large datasets

Prerequisites

  • Node.js (v14 or higher)
  • npm (v6 or higher)

Installation

  1. Clone the repository:

    git clone https://github.com/tesla07/processor-interview-ut.git
cd transaction-processor

  2. Install dependencies for backend and frontend:

    npm install
npm install http-server

Usage

  1. Start the backend server: 
    cd backend
npm run dev
  2. Start the frontend server:
 cd frontend
 http-server
  1. Open your browser and navigate to http://localhost:8081 to access the application.

API Endpoints

Upload Transactions: POST /upload

Upload a CSV file containing transaction data.

  • Request Body: Use a form with a file input to upload the CSV file.
  • Response: Success message or error details.

Get Collections: GET /collections

Retrieve all collections of accounts with negative balance.

Get Bad Transactions: GET /bad-transactions

Retrieve all bad transactions (transactions with missing fields).

Reset System: POST /reset

Clear all data from the system (transactions, cards, and accounts).

  • Response: Success message confirming data reset.