Nodejs/Graphql/AWS/Lambda/Serverless/React

Prerequisites

• Node > 8.0
• create-react-app
• Serverless > 1.2.0

Backend

Backend provides a Graphql API to query data. The application is written in NodeJs/Typescript and can be deployed in AWS Lambda, served with AWS API gateway. Data is stored in a json file. Serverless framework is used for deploying application to aws. Webpack is used for bundling and packaging lambda function.

Installation

• Install Serverless Framework globally.

npm install -g serverless

• Go to backend folder and run npm install
• Run serverless offline start to run application locally.
• Goto http://127.0.0.1:3002/graphiql to query and see response from the graphql server.

Sample Query

{
    data(date:"20180507",currency:"LTC")
    {
        date
        currency
        buy_time
        buy_price
        sell_time
        sell_price
        profit
    }
}

Sample Response

{
    "data": {
        "data": [
        {
            "date": "20180507",
            "currency": "LTC",
            "buy_time": "0930",
            "buy_price": "14.32",
            "sell_time": "1245",
            "sell_price": "15.03",
            "profit": "0.71"
        }
        ]
    }
}

• Run npm test to run unit tests.

Deploying to AWS

• Setup aws credentials.
• Run serverless deploy to deploy application to aws.

Frontend

Frontend is built in react with create-react-app. Uses Redux for application's state management.

Installation

• Go to frontend folder and run npm install
• Run npm start to run application locally. Requires backend application to run to fetch data.
• Run npm test to run unit tests.

Data can be filtered by date and/or currency. Data available for date 20180507 and 20180508