AIRa: A JavaScript repository from NTNU-DT

AIRa - An automated infection risk assessment platform for an indoor environment

1. Introduction

Indoor air quality is an important parameter for the protection of occupants in an indoor environment. AIRa is an automated infection risk assessment tool for the indoor air quality management of buildings. AIRa was built on the open-source blockchain technology, Hyperledger, which integrates the state-of-the-art infection risk assessment methods, Wells-Riley, for estimating potential risks of virus spread. It can detect access the risk in near real time and send alert messages to the public and building managers.

2. Online demo

Adminstration console: http://47.254.152.209:8501

Historical alert messages: http://47.254.152.209:5000

3. Installation

Install GIt, cURL, Docker and Docker compose (https://hyperledger-fabric.readthedocs.io/zh_CN/latest/prereqs.html).
Install Fabric V2.2 (https://hyperledger-fabric.readthedocs.io/en/latest/install.html) and Node.js (https://github.com/nvm-sh/nvm#installation).
Enter the corresponding folder “AIRa”
Start the Fabric network:
```
bash organization/network-starter.sh
```

Install the smart contract to the channel:

cd organization/division/
source division.sh
peer lifecycle chaincode package cp.tar.gz --lang node --path ./contract --label cp_0
peer lifecycle chaincode install cp.tar.gz  //The command will return the PACKAGE_ID, which is used in the next step.
export PACKAGE_ID={PACKAGE_ID}	
peer lifecycle chaincode approveformyorg --orderer localhost:7050 --ordererTLSHostnameOverride orderer.example.com --channelID mychannel --name papercontract -v 0 --package-id $PACKAGE_ID --sequence 1 --tls --cafile $ORDERER_CA

Install the smart contract to the channel for another node: Open a new shell window

cd AIRa/organization/center/
source center.sh 
peer lifecycle chaincode package cp.tar.gz --lang node --path ./contract --label cp_0
peer lifecycle chaincode install cp.tar.gz  //The command will return the PACKAGE_ID, which is used in the next step.
export PACKAGE_ID={PACKAGE_ID}	
peer lifecycle chaincode approveformyorg --orderer localhost:7050 --ordererTLSHostnameOverride orderer.example.com --channelID mychannel --name papercontract -v 0 --package-id $PACKAGE_ID --sequence 1 --tls --cafile $ORDERER_CA

Commit the chaincode definition to the channel: Open the shell window

peer lifecycle chaincode commit -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --peerAddresses localhost:7051 --tlsRootCertFiles ${PEER0_ORG1_CA} --peerAddresses localhost:9051 --tlsRootCertFiles ${PEER0_ORG2_CA} --channelID mychannel --name papercontract -v 0 --sequence 1 --tls --cafile $ORDERER_CA --waitForEvent

Create a user in “division” node: Open the shell window of “division”
```
cd AIRa/organization/division/application
npm install
node addToWallet.js
```

Run the alert history webpage:

cd AIRa/organization/division/application
export FLASK_APP=views.py
flask run --host=0.0.0.0

Run the administrative control webpage:

cd AIRa/organization/division/application
streamlit run POTENTIAL_INFECTION_ALERT.py