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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

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

AWS

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