Project Team-20

Team Members: Neil Shah, Archana Yadawa, Nishtha Atrey, Kruti Thukral

BlockChain for RealEsate title records - APPROVED

Problem statement:

One of the biggest challenges in buying/selling real estate, especially in a country like India, is the legal process of checking the property's title. The percentage of frauds that happen in that domain are enormous(upwards of 50%) and expensive. A person would have to hire a lawyer and wait for 1-2 months until the legal check is done and even then there is no gurantee that the title is clear.

Title records are decentralized, challenging-to-access aspect of the real estate buying/selling process. Even in 2017, title information remains stored at the local level and is offline. With the blockchain, this can be changed. The blockchain could provide a central title database for the entire country to securely store and instantly access historical title records, allowing for the streamlining of title transfer in a property sale.

Methodology: (Using HyperLedger Composer, MERN stack, kafka, AWS/bluemix)

• Property details need to be tracked, de-centralized and accessable to buyer/seller.
• Hyper Ledger Fabric will provide - Identity management, Privacy and confidentiality, Efficient processing, Chaincode functionalities, Modular design
• Create a front-end app/web portal where buyer/seller can search for properties and view all of its title details
• Back-end node server will handle requests for transactions and write to decentralized ledger

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Usage (Links for AWS hosting provided + run commands for running locally)

AWS

• Hyperledger: http://107.23.194.9:4000
• Bloquity Web App: http://23.22.128.199:3000

Running locally

Dependencies

• Docker
• Node (npm)
• nvm (version 8)
• Composer-rest-server (npm install -g composer-rest-server)
• Composer-cli (npm install -g composer-cli)
• Java 8
• Kafka 2.1.1-1.1.0

Starting Hyperledger

• Start Docker
• Run below command in terminal

nvm use 8

• Inside hyperledger/fabric-dev-server/ run the following:

./downloadFabric.sh (Only for thr first time . Next time hyperledger needs to be started, this step should be skipped)
./startFabric.sh
./createPeerAdminCard.sh (Needs to be done only first time. Not sure need to check on this)

• Go back one level to hyperledger/ and then change directory to blockchain and run the following:

composer network install --archiveFile digital-property.bna  --card PeerAdmin@hlfv1

composer network start --networkName digital-property --networkVersion 0.2.6 --card PeerAdmin@hlfv1 --networkAdmin admin --networkAdminEnrollSecret adminpw

composer card import --file admin@digital-property.card (Needs to be done only first time. Not sure need to check on this)

composer-rest-server -c admin@digital-property -p 4000

Starting ZooKeeper and Kafka

• Inside kafka2.1.1-1.1.0/ folder: Terminal 1:

bin/zookeeper-server-start.sh config/zookeeper.properties

• Inside kafka2.1.1-1.1.0/ folder:Terminal 2:

bin/kafka-server-start.sh config/server.properties

• Inside kafka2.1.1-1.1.0/ folder:Terminal 3: (need to run only each time device restarts)

./topic.sh 

Starting Frontend and Backend

• Inside Backend/ Terminal 4:

npm install
node index.js

• Inside kafka-backend/ Terminal 5:

npm install
npm start

• Inside Fronend/ Terminal 6:

npm install
npm start