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Hyperledger Composer Components
What components are included in Hyperledger Composer? Here are major components included in Hyperledger Composer: Composer Runtime - Runs on top of the Hyperledger Fabric framework to run ledger applications called business networks. Composer Playground - Runs in a Web browser providing a Hyperledge...
2021-12-28, ∼1576🔥, 0💬

"composer card" Commands
What can I do with "composer card" command? "composer card" commands are part of the Composer CLI command set. It allows you to manage access cards stored in the Composer Wallet, which is located at "~/.composer/cards" directory. Here is the syntax of the "composer card" commands: $ composer card he...
2020-07-22, ∼1576🔥, 0💬

Auto-Start of Required Chaincode Container
Why a chaincode container is automatically started? A chaincode container will be automatically started, if a chaincode is invoked and the chaincode container's peer is a required peer for the chaincode. Let's continue with the previous tutorial to see this behavior. 6. Stop the chaincode container ...
2020-07-03, ∼1576🔥, 2💬

💬 2020-07-03 chelseaclark: Creative Bioarray provides a rapid, high-throughput slide scanning service for different kinds of application. The whole slide s...

"first-network" - Building Your First Network
What is BYFN (Build Your First Network)? BYFN (Build Your First Network) is a tutorial provided in the Hyperledger Fabric "Samples, Binaries and Docker Images" package provided at http://bit.ly/2ysbOFE . After installing the binary package, the BYFN tutorial is located at ~/hyperledger-binaries/fabr...
2020-05-05, ∼1575🔥, 0💬

Reinstall Node.js Required Modules
How to reinstall Node.js Required Modules with the new version of npm? After installing the latest version of "node" and "npm" with "nvm", you can reinstall Node.js Required Modules to run Node.js client applications again the WYFA network. 1. Remove all files in "node_modules": $ cp ~/hyperledger-b...
2020-01-04, ∼1575🔥, 0💬

Basic Sample Business Network - Home Page
What is on the Basic Sample Business Network home page? You can follow this tutorial to see what's on the Basic Sample Business Network home page. 1. Run Web browser and go to: composer-playground.mybluemix. net. 2. Click on "Let's Blockchain!" to skip the welcome page. 3. Click "Get Started -&g...
2020-12-22, ∼1568🔥, 0💬

Deploy orderer.example.com Manually
How to Deploy orderer.example.com as a Docker container manually? You can follow this tutorial to Deploy orderer.example.com as a Docker container manually. 1. Verify the configuration of the orderer.example.com container defined in the docker-compose.yml file: $ cd ~/hyperledger-binaries/fabric- sam...
2020-03-25, ∼1568🔥, 0💬

Create Peer Admin Access Card
How to Create Peer Admin Access Card for my Hyperledger Fabric developer environment? Create Peer Admin Access Card is needed to deploy new Composer business network BNA file to the Hyperledger Fabric developer environment. You can follow these steps to a Create Peer Admin Access Card. 1. Create a n...
2020-12-26, ∼1566🔥, 0💬

"composer archive" to Generate BNA File
How to package my business network source code files into a BNA file for deployment? You can use the "composer archive create" command to package my business network source code files into a BNA file for deployment: $ cd tutorial-network $ composer archive create -t dir -n . $ ls -l tutorial-network...
2021-02-04, ∼1562🔥, 0💬

"configtxgen" Command - Build channel.tx
How to run "configtxgen" command to build a transaction message to create the channel in BYFN (Build Your First Network)? You can follow this tutorial to run "configtxgen" command to build a transaction message to create the channel in BYFN. The "configtxgen" command file is located in the ../bin di...
2020-10-20, ∼1561🔥, 0💬

Objectives of WYFA tutorials
What are the objectives of WYFA (Writing Your First Application) tutorials? Objectives of WYFA (Writing Your First Application) tutorials provided at hyperledger-fabric.readthedocs .ioWebsite are: 1. Setting up a development environment. Our application needs a network to interact with, so we’ll get...
2020-03-15, ∼1559🔥, 0💬

Create Identity Wallet for Isabella
How to Create Identity Wallet for Isabella at MagnetoCorp? Once Isabella gets a copy of the private key and the certificate that represents her identity, User1@org1.example.com, on the PaperNet, she needs to put them in a local wallet. Whenever Isabella runs an application, it will open the wallet a...
2019-11-21, ∼1559🔥, 0💬

Add Identity using JSON String
How to add a new identity using a JSON string? You can follow this tutorial to add a new identity using a JSON string. 1. Go to the Fabric CA Client system where you have the "admin" wallet created in the previous tutorial. $ cd ~/fabric-ca/native-client/admi n$ export FABRIC_CA_CLIENT_HOME=~/fabric ...
2019-09-16, ∼1558🔥, 0💬

Introduction of Hyperledger Composer
Where to find tutorials on Introduction of Hyperledger Composer. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Introduction of Hyperledger Composer. Hyperledger Composer Components Hyperledger Composer Runtime   ⇒ Hyperledger Composer Co...
2021-12-28, ∼1557🔥, 0💬

Pull Hyperledger Fabric Peer Image
How to Pull Hyperledger Fabric Peer Image from docker hub? You can follow this tutorial to Pull Hyperledger Fabric Peer Image from docker hub. 1. Check the Docker local repository: $ docker image list | grep fabric-peer hyperledger/fabric-peer latest a1e3874f338b 3 weeks ago 178MB hyperledger/fabric...
2019-05-10, ∼1557🔥, 0💬

Main Interfaces to Communicate with Ledger Peer
What are Main Interfaces to Communicate with a ledger peer on a hyperledger fabric network? There are 3 Main Interfaces to Communicate with a ledger peer on a hyperledger fabric network. 1. Peer CLI - The Peer CLI is a Command Line Interface (CLI) provided as part of the Hyperledger Fabric distribut...
2020-01-21, ∼1549🔥, 0💬

Remove Log Files of Docker Container
How to remove log files of a Docker container? If you keep a Docker container running for many days, it will generate many log files on your hosting system. You can follow this tutorial to remove old log files of a Docker container. 1. Get the container ID of "peer0.org1.example.com" container: $ do...
2020-05-29, ∼1547🔥, 0💬

What Is Basic Sample Business Network
What is Basic Sample Business Network? Basic Sample Business Network is the "Hello World" of Hyperledger Composer samples, which demonstrates the core functionality of Hyperledger Composer by changing the value of an asset. Basic Sample Business Network supports the following business object types: ...
2020-12-22, ∼1545🔥, 0💬

Watch Peer Container Log
How to watch the log file of Peer Container Log? You can follow this tutorial to watch the log file of a peer container: 1. Set up a new terminal on the hosting system to follow the log file of the "peer0.org1.example.com" container: $ docker logs --tail 10 -f peer0.org1.example.com [gossip.comm] fu...
2020-07-07, ∼1542🔥, 0💬

Impact of Stopping Chaincode Container
What is the impact of stopping a chaincode container of a peer? We know that if a Peer has chaincode installed, it will run it as chaincode container to help the channel to perform a transaction on the chaincode. If you stop a chaincode container of a peer who is not a required member of the chainco...
2019-04-17, ∼1540🔥, 0💬

Verify Blockchain on the Channel
How to Verify Blockchain on the Channel? Since all transactions (changes of assets managed by chaincodes) are stored in the blockchain shared by all peers of the channel, you can use the "peer channel" CLI command to look at them. 1. Connect to CLI container: $ docker exec -it cli bash root@262918fd...
2020-02-20, ∼1535🔥, 0💬

What Is Blockchain
What Is Blockchain? A blockchain is a growing list of data blocks that are cryptographically chained together. A blockchain has the following main features: A data block has a header and a list of data transactions. Merkle hash tree is used to store a fingerprint of all transactions in the block hea...
2022-03-29, ∼1534🔥, 0💬

"composer network" - Deploy BNA File
How to deploy and start a business network BNA file to the local Hyperledger Fabric developer environment? You can use the "composer network" command to deploy and start a business network BNA file on the local Hyperledger Fabric developer environment: $ cd tutorial-network $ composer network instal...
2021-02-04, ∼1533🔥, 0💬

Install Node.js Application Dependencies
What is Install Node.js Application Dependencies? Since the applications are written with Hyperledger Fabric Node.js SDK Isabella needs to install some dependencies, which are listed in the package.json file. (isabella)$ cd ~/hyperledger-binaries/fabric- samples(isabella)$ cd commercial-paper/organi...
2019-12-02, ∼1531🔥, 0💬

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