To use the Fabric Digital Product Passport, you need to download the Fabric Docker images and the Fabric CLI tools. First, make sure that you have installed all of the Fabric prerequisites. You can then follow the instructions to Install the Fabric Samples, Binaries, and Docker Images in the Fabric documentation. In addition to downloading the Fabric images and tool binaries, the Fabric samples will also be cloned to your local machine.
First get the install script:
curl -sSLO https://raw.githubusercontent.com/hyperledger/fabric/main/scripts/install-fabric.sh && chmod +x install-fabric.sh
Then pull the docker containers and the binaries
./install-fabric.sh docker binary
Default fabric version is always the latest version, but it can also be set by running this command (for example for version 2.5.0 - which is the version this project was developed):
./install-fabric.sh --fabric-version 2.5.0 binary
The Fabric test network in the test network folder provides a Docker Compose based test network with two Organization peers and an ordering service node. You can use it on your local machine to run the samples listed below. You can also use it to deploy and test your own Fabric chaincodes and applications. To get started, see the test network tutorial.
To test the application you first have to run the test network. Instructions are also in the test network tutorial.
cd test-network
With the network.sh script the network can be started.
./network.sh down
to remove any container or artifact from previous runs
./network.sh up
to bring up the network together with its peers and orderer nodes.
Then a channel has to be created for the communication between the organizations.
./network.sh createChannel
this creates a channel with the name 'mychannel'
After that you have to install the chaincode on the channel and define where the privata data collection defintion is located:
./network.sh deployCC -ccn private -ccp ../product-passport/chaincode-typescript -ccl typescript -ccep "OR('Org1MSP.peer','Org2MSP.peer')" -cccg ./collections_config.json
To interact with the test network and chaincode the peer CLI can be used. To use it the binaries have to be set as well as the fabric cfg path to point to the core.yaml
export PATH=${PWD}/../bin:$PATH
export FABRIC_CFG_PATH=$PWD/../config/
When operating as Organisation 1 the environment variables can be set to the following:
export CORE_PEER_TLS_ENABLED=true
export CORE_PEER_LOCALMSPID="Org1MSP"
export CORE_PEER_TLS_ROOTCERT_FILE=${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt
export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org1.example.com/users/[email protected]/msp
export CORE_PEER_ADDRESS=localhost:7051
When operating as Organisation 2 the environment variables can be set to the following
export CORE_PEER_LOCALMSPID="Org2MSP"
export CORE_PEER_TLS_ROOTCERT_FILE=${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt
export CORE_PEER_MSPCONFIGPATH=${PWD}/organizations/peerOrganizations/org2.example.com/users/[email protected]/msp
export CORE_PEER_ADDRESS=localhost:9051
To initialize the initial data call the InitLedger function which registers some sample products and materials to the blockchain.
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"InitLedger","Args":[]}'
Depending on which function you want to call the function field has to be set with the function name you want to call.
A function with arguments is called like in the following example.
The example shows the ReadMaterialsOfProduct function which takes the ID of the product as argument. The argument is passed in quotes to the "Args":[]" of the function call. In this case "product1":
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"ReadMaterialsOfProduct","Args":["product1"]}'
If there is an error the response will write the error together with the error message in the terminal. For instance, here the caller does not have enough permissions to request private material data:
Error: endorsement failure during invoke. response: status:500 message:"Access denied. Caller does not have permission to read materials of product product1"
If succesful the response will look something like this, where instead of the hashes, the whole material data is displayed:
2023-07-05 15:24:13.461 CEST 0001 INFO [chaincodeCmd] chaincodeInvokeOrQuery -> Chaincode invoke successful. result: status:200 payload:"[\"{\\\"docType\\\":\\\"material\\\",\\\"ID\\\":\\\"material1\\\",\\\"MaterialName\\\":\\\"Material 1\\\",\\\"Producer\\\":\\\"Producer 1\\\",\\\"AppraisedValue\\\":100,\\\"Seller\\\":\\\"Producer 1\\\",\\\"Recycled\\\":false}\",\"{\\\"docType\\\":\\\"material\\\",\\\"ID\\\":\\\"material2\\\",\\\"MaterialName\\\":\\\"Material 2\\\",\\\"Producer\\\":\\\"Producer 2\\\",\\\"AppraisedValue\\\":200,\\\"Seller\\\":\\\"Producer 2\\\",\\\"Recycled\\\":false}\"]"
To request acces to the materials of a product the RequestAccess function can be called. This function requests access for the caller. The function can be called like the following:
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"RequestAccess","Args":["product1"]}'
The Manufacturer of the product, which is Org1 in this example, can then either approve or reject the request by calling the approveAccessForRequestID function. In this example the request for product1 for Org2MSP is approved by setting the approval to true:
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"approveAccessForRequestID","Args":["product1", "Org2MSP", "true"]}'
When a product is recycled the RecycleAndOffer function can be called to mark a product as Recycled and to register the materials as new Recycled Material objects on the blockchain.
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"RecycleAndOffer","Args":["product1"]}'
After the recycling process the recycled materials get registered on the blockchain as Recycled materials, that material producers can query for and then buy back with the given information:
peer chaincode invoke -o localhost:7050 --ordererTLSHostnameOverride orderer.example.com --tls --cafile "${PWD}/organizations/ordererOrganizations/example.com/orderers/orderer.example.com/msp/tlscacerts/tlsca.example.com-cert.pem" -C mychannel -n private --peerAddresses localhost:7051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org1.example.com/peers/peer0.org1.example.com/tls/ca.crt" --peerAddresses localhost:9051 --tlsRootCertFiles "${PWD}/organizations/peerOrganizations/org2.example.com/peers/peer0.org2.example.com/tls/ca.crt" -c '{"function":"GetMaterialInformation","Args":["material1RECYCLED"]}'
The response shows, who is the Seller of the recycled procut:
Chaincode invoke successful. result: status:200 payload:"{\"AppraisedValue\":100,\"ID\":\"material1RECYCLED\",\"MaterialName\":\"Material 1\",\"Producer\":\"Producer 1\",\"Recycled\":true,\"Seller\":\"Org2MSP\",\"docType\":\"material\"}"
Hyperledger Project source code files are made available under the Apache License, Version 2.0 (Apache-2.0), located in the LICENSE file. Hyperledger Project documentation files are made available under the Creative Commons Attribution 4.0 International License (CC-BY-4.0), available at http://creativecommons.org/licenses/by/4.0/.
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