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Now we'll navigate to the folder "fabric-samples/test-network". This contains a shell script called "network.sh". The script will also be there if we'd only have installed the samples and not the binaries, but we wouldn't be able to bring up the Test-Network.

I am on Windows 10 home and have all the pre-requisites installed. I am having trouble running the Fabcar example of Hyperledger Fabric. I am in fabric-samples\fabcar folder and using Docker Quickstart Terminal of Docker Toolbox to run the terminal command ./startFabric.sh javascript

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The first problem is because you are using Docker Toolbox. This has lots of limitations especially around file sharing between windows and linux containers. I believe it can be made to work and there are articles on google you can search around this area.

In order to start the first Hyperledger fabric network Fabric-samples repository will be used. This repository is a set of CLI tool binaries and Fabric Docker Images that help you understand and use the basics of Fabric. Install the below dependencies before starting the project:

Installation on Windows: Visit the link to install the Docker setup on Windows. Hyperledger Fabric samples being used here are highly dependent on the bash script. So in windows where you need to install docker, it is recommended to use WSL2(Windows Subsystem for Linux). You can directly install any Linux system of your choice through the windows store.

Step 3: Now you can bring up a network using the following command. This command creates a fabric network that consists of two peer nodes and one ordering node. No channel is created when you run ./network.sh up

Any plan to update the instalation procedure and scripts describe here ( -au/azure/blockchain/templates/hyperledger-fabric-consortium-azure-kubernetes-service) for Hyperledger Fabric 2.0?

Thanks

I'm currently in my final year of university, over the summer i was introduced to hyperledger fabric and even went through the linux academy courses to understand a bit more of the tech. In addition, im also currently studying for the CHFD examination.

It seems that as of now the tech is pretty much in its infancy stage. I just wanted to know more about your thoughts/experiences on working this technology(some of the opportunities which are present) and maybe some advice on whether i should continue to focus more on learning how to use hyperledger to build applications or whether i should just focus on conventional swe roles.

Methods in Chaincode can be invoked directly from VS Code. Create a file with a .fabric extension anywhere in the project. For e.g. create file called test.fabric at the root of the project folder. Add the below json to the file.

You can query or invoke any Chaincode method by specifying the method name and the corresponding parameters as a JSON array. Try adding any of the Invoke and Query samples mentioned at the top of the asset_transfer_ledger_chaincode.go file. You can add multiple methods in the same file or even create multiple .fabric files as needed.

Go to the .fabric file that was created earlier and click on the "Send Request" link showing up above each of the Chaincode method. For e.g. clicking on the link above the ReadAsset method will hit the breakpoint set earlier in step 4.

Create a .fabric file anywhere in the project. The .fabric file is a JSON file in which you can add the details of one or more Chaincode methods that you want to invoke as well as arguments to be supplied and identity to be used. You can define multiple requests in one file as well as you can create multiple files as needed. e.g

Even though the local fabric network is started, in order for you to submit a transaction defined in the .fabric file, the Chaincode has to be started in Debug mode. Press F5 or select the Run and Debug button from the Run view to start debugging.

The second approach would be to leverage the development environment setup (which we will assume you have already established) to build and deploy your own binaries and/or Docker images from a clone of the hyperledger/fabric GitHub repository. This approach is suitable for developers that might wish to contribute directly to the Hyperledger Fabric project, or that wish to deploy from a fork of the Hyperledger code base.

Your output might contain something like inet 172.17.0.1/16 scope global docker0. That means the docker0 interface is on IP address 172.17.0.1. Use that IP address for the CORE_VM_ENDPOINT option. For more information on the environment variables, see core.yaml configuration file in the fabric repository.

A consensus plugin might require some specific configuration that you need to set up. For example, to use the Practical Byzantine Fault Tolerant (PBFT) consensus plugin provided as part of the fabric, perform the following configuration:

Swap out the blue portion with the tags you see in your list of repositories. Also, swap out the red portion with the name of the Docker image you are switching the tag for (e.g.: fabric-tools, fabric-ccenv, fabric-orderer, etc.). Repeat this step for all Docker images you see in the list.

The 'Raft' consensus type was introduced in v1.4.1 and has become the preferredproduction consensus type. There is a documented and tested migration path fromKafka to Raft, and existing users should migrate to the newer Raft consensus type.For compatibility with existing deployments, Kafka is still supported,but may be removed entirely in a future release.Additionally, the fabric-kafka and fabric-zookeeper docker images are no longer updated, maintained, or published.

v2.2.0 added support for CouchDB 3.1.0 as the recommended and tested version of CouchDB.If prior versions are utilized, a Warning will appear in peer log.Note that CouchDB 3.1.0 requires that an admin username and password be set,while this was optional in CouchDB v2.x. See theFabric CouchDB documentationfor configuration details.Also note that CouchDB 3.1.0 default max_document_size is reduced to 8MB. Set a higher value if needed in your environment.Finally, the fabric-couchdb docker image will not be updated to v3.1.0 and will no longer be updated, maintained, or published.Users can utilize the official CouchDB docker image maintained by the Apache CouchDB project instead.

The fabric-tools docker image will not be published in future Fabric releases.Instead of using the fabric-tools docker image, users should utilize thepublished Fabric binaries. The Fabric binaries can be used to make client callsto Fabric runtime components, regardless of where the Fabric components are running.

The network.json file within test/fixtures/ provides the necessary information to connect and interact with a running fabric network. While it is only a sample, it's enough to let you bootstrap a working networking.

NOTE: Any time you change any of the files in your local fabricdirectory (under $GOPATH/src/github.com/hyperledger/fabric), theupdate will be instantly available within the VM fabric directory.

In Hyperledger Fabric, the fabric-ccenv image contains the github.com/hyperledger/fabric/core/chaincode/shim (shim) package. This allows you to package a chaincode without needing to include the shim. However, this may cause issues in future Hyperledger Fabric releases, and it may cause issues when using packages that are included with the shim.

yo provides us a generator ecosystem where generators are plugins which can be run with the yo command. This is used to set up boilerplate sample applications for various projects. generator-hyperledger-composer is the Yo generator we will be using as it contains specs to generate boilerplate business networks among other things.

To create the Angular web application, type yo hyperledger-composer in your Terminal, select Angular, choose to connect to an existing business network with the card admin@cards-trading-network, and connect to an existing REST API as well. (Edit: Newer versions of the software may ask for the card file instead of just the name of the card)

Blockchain is a distributed database structured that provides a practically unalterable (immutable) timeline of stored transactions. By relying on hashing and the Raft consensus algorithm, if an entity tries to illegitimately alter a record at one instance of the database the other ledger nodes are not altered. They work to cross-reference each other and easily locate any incorrectly added data and remove it. The bulk raw data is stored in an off-chain storage (outside of the blockchain ledger) and a hash of this baseline data is stored in the Blockchain ledger via hashing windows of time-series and configuration data, after aggregation and filtering. The bulk off-chain data repository is then considered to be trust-anchored using the hashes stored in the blockchain.

To secure the electric grid testbed devices and data, device configuration baselines were compared to those baselines that had been previously stored in the ledger. Statistical baselines for device configurations, network communication patterns, and high-speed sensor data are calculated and then stored off-chain and hashes stored in the ledger. Measurements such as three-phase voltage and current, frequency, breaker status, protection scheme settings, network configuration settings (and other device configuration artifacts) and network traffic features (packet interarrival times) are compared every minute or other selected time windows. 2351a5e196