Source code for Blockchain certified Documents for trusted information (BC-DTI) for conference DESRIST2020. TODO: Fill-in more information about his application/demo

• hyperledger-chaincode/ - Contains chaincode for this application
• hyperledger-api-server/ - API server implementation for the chaincode
• website/ - Frontend for the application

1. The acceptor of the university uploads the document which needs to be inserted to the system.
2. The SHA256 of the document is calculated and awaits for approver for endorsement.
3. The approver verifies the correctness of the document and signs it.
4. This is send to the chaincode which submites the transaction proposal to the orderer.
5. Orderer orders a new transaction and mines a fresh block with the data.

1. The verifier uploads the document to be verified from the verification page.
2. The SHA256 of the document is calculated and submits to the chaincode.
3. The chaincode fetches the correct SHA256 of the document from the blockchain and verifies it with the one SHA256 provided by the verifier.
4. The chaincode returns true or false based on check.

1. golang >= 1.13.5
2. Hyperledger Fabric = 1.4.4

1. Optional: Install system packages necessary for fabric

./run.sh fabric-system

2. Install the fabric itself

./run.sh fabric-platform

3. Get the test network up with default mychannel

(cd fabric-samples/test-network; ./network.sh down && ./network.sh up createChannel -s couchdb && ./network.sh deployCCCV)

4. Verify existing documents in the network

(cd fabric-samples/test-network; FABRIC_CFG_PATH=$PWD/../config/ ./scripts/insert.sh 0)

5. Insert the sha256sum of a test ID (111092-221P) and first Document test_doc.txt

(cd fabric-samples/test-network; FABRIC_CFG_PATH=$PWD/../config/ ./scripts/insert.sh 1)

6. Insert the sha256sum of a test ID (111092-221P) and second Document test_doc2.txt

(cd fabric-samples/test-network; FABRIC_CFG_PATH=$PWD/../config/ ./scripts/insert.sh 2)

7. The verification can also been seen in the console and also from couchdb of peer0 or peer1 http://localhost:5984 or http://localhost:7984