nCent (API)

• Overview
• Installation
• Deploying
• CI/CD
• Contribute
• Contributors
• Author

Overview

• nCent Api
• This api is to be used to interact with the nCent protocol.
• Currently the logic is running via a traditional application structure.
  • We will be moving most of the protocol logic into a blockchain
• Api Reference docs can be found here
• Model docs can be found here
• UML Diagrams can be found here

Tech stack:

• Serverless, Kotlin, jUnit, exposed (mysql, auroraserverless), circleci

Install

NOTE: Make sure you're using Java 8 (v1.8.*)

1. Install it using npm:

git clone git@github.com:thejnaut1/ncnt.git
cd ncnt/kotlin/kotlin-serverless
npm install serverless -g
npm init -f
npm install

2. Create your project in serverless.com

3. To configure your AWS credentials execute serverless config credentials --provider aws --key EXAMPLE --secret EXAMPLEKEY

4. mvn clean install

5. ./start.sh local

Deploying

1. Create AWS Serverless Aurora RDS DB and Create EC2 Instance to Access RDS DB
   • run make with the desired arguments

   • make name=NAME vpc_cidr=172.21.0.0/16 subnet1_cidr=172.21.1.0/24 subnet2_cidr=172.21.2.0/24 master_user_password=PASSWORD

   • copy the output key and create a pem file for using it on the ssh
   • change pem file permission as below

   • chmod 444 key.pem

2. Add ncnt database to the newly created db
   • Connect to the ec2 instance

   • ssh -i <path to pem file> ec2-user@<ec2 public url>

   • Update yum

   • sudo yum update

   • Install mysql if it doesn’t exist (check by using mysql command)

   • sudo yum install mysql

   • mysql -h <aurora db cluster url> -P 3306 -u <dbusername> -p

   • Create database ncnt if it doesn’t exist
3. Update serverless.yml
   • Vpc:, securityGroupIds, subnetIds
   • Environment: database_url, database_driver, database_user, database_password
   • For local env use after you have created a mysql database and added a ncnt db:
     • database_url: jdbc:mysql://localhost:3306/ncnt
     • database_driver: com.mysql.jdbc.Driver
     • database_user: root
     • database_password:
   • For production env use creds from above aws instances
4. Setup env vars in serverless.yml and also add to AWS SMPS (ex: ${ssm:/ncnt/production/database/user})
5. Install serverless
6. Setup AWS Creds for Serverless Framework
7. Create project in https://dashboard.serverless.com if it doesn’t already exist
8. To deploy ./start.sh

   ./start.sh local
   ./start.sh production

CI/CD

• Using circleci you can setup continuous integration and deployment. Look at /.circleci/config.yml
• Current configuration depends on the following:
  • all new pull requests will auto build and test
  • all pushes to master branch will deploy to development env
  • all pushes to production branch will deploy to production env
  • after any deployment, postman tests will get triggered

Contributing

• Feel free to create pull requests in your own branch, include descriptions and tests.
• Contact info: nCent

Contributors

Contributions by:

• Adam Foosner
• Arya Soltanieh

Author

Arya Soltanieh