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Switch Default Peer on BYFN CLI Container
How to switch the default peer on BYFN CLI Container? I want to join peer0.org2.example.com to the channel. You can follow this tutorial to switch the default peer to peer0.org2.example.com and join it to BYFN "mychannel" channel. 1. Switch the default peer by changing environment variables: bash-4....
2020-09-30, 1005🔥, 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, 1002🔥, 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, 1002🔥, 0💬

Member Peers of a Channel
How to find out which Peers are members of the "mychannel" channel? One way to find out which Peers are members of the "mychannel" channel is to visit each peers and check their joined channel list: 1. Connect to the CLI container: $ docker exec -it cli bash bash-4.4# 2. Check joined channel list on...
2020-05-29, 998🔥, 0💬

Verify Docker Engine on Ubuntu
How to verify Docker Engine on Ubuntu? Hyperledger Fabric framework runs on Docker Engine. So it is important to verify that Docker Engine is running correctly on your local Ubuntu system. Here are some suggestions on how to verify the Docker Engine. 1. Verify version of the Docker Engine and make s...
2020-05-15, 994🔥, 0💬

Hyperledger Fabric Network
Where to find tutorials on Hyperledger Fabric Network? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Fabric Network. Simplest Hyperledger Fabric Network Two-Organization Hyperledger Fabric Network Multiple Ledger Peers within Orga...
2020-02-07, 994🔥, 0💬

What Is Ledger Peer Operation RESTful API
What is Ledger Peer Operation RESTful API? Ledger Peer Operation RESTful API is RESTful Web service provided by a ledger peer. It is different than and separated from the primary ledger Web service provided by the ledger peer. Ledger Peer Operation RESTful API exposes the following functionalities: ...
2019-04-11, 993🔥, 0💬

Clean Up Docker Engine for WYFA
How to Clean Up Docker Engine to run the WYFA (Writing Your First Application) tutorial? You can follow these steps to setup the Clean Up Docker Engine to run the WYFA (Writing Your First Application) tutorial. 1. Stop existing Hyperledger Fabric Networks on your local host by stopping all Docker co...
2020-02-29, 992🔥, 0💬

issue.js - Application to Issue New Paper
What is the Application to Issue New Pape, issue.js? issue.js is a client application using the Hyperledger Fabric Node.js SDK library to invoke the issue() function of the papercontract running on the PaperNet. 1. View issue.js source code: (isabella)$ cd ~/hyperledger-binaries/fabric- samples(isab...
2019-11-21, 991🔥, 0💬

"composer network" Commands
What can I do with "composer network" command? "composer network" commands are part of the Composer CLI command set. It allows you to manage business networks running in the Hyperledger Composer developer environment. Here is the syntax of the "composer network" commands: $ composer network help Com...
2020-12-26, 990🔥, 0💬

Reinstall Chaincode on WYFA Network
How to Reinstall Chaincode on the WYFA (Writing Your First Application) network? You can follow these steps to Reinstall Chaincode on the WYFA (Writing Your First Application) network. 1. Try to install "fabcar" chaincode again. You may see an error, if the chaincode is already installed. $ docker e...
2020-02-29, 990🔥, 0💬

"configtxgen" Command - Build *MSPanchors.tx
How to run "configtxgen" command to build a transaction message to define the anchor peer in each organization in BYFN (Build Your First Network)? You can follow this tutorial to run "configtxgen" command to build a transaction message to define the anchor peer in each organization in BYFN. The "con...
2020-10-20, 989🔥, 0💬

What Is Hyperledger Composer Playground
What Is Hyperledger Composer Playground? Hyperledger Composer Playground is a Web browser based tool that allows you to build and test your hyperledger application quickly. Hyperledger Composer Playground is part of the Hyperledger Composer tool set, which is designed to help you to build and test a...
2021-12-28, 988🔥, 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, 983🔥, 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, 982🔥, 0💬

BYFN CLI "peer" Command Prefix
How to use BYFN CLI "peer" Command Prefix? By default, when you run the "peer" command on the BYFN CLI container, it will be executed again the default peer node specified by 4 environment variables: CORE_PEER_MSPCONFIGPATH=/opt/g opath/.../org1.example.com/use rs/Admin@org1.example.com/mspCORE_PEER_...
2020-09-15, 981🔥, 0💬

Deploy ca.example.com Manually
How to Deploy ca.example.com as a Docker container manually? You can follow this tutorial to Deploy ca.example.com as a Docker container manually. 1. Verify the configuration of the ca.example.com container defined in the docker-compose.yml file: $ cd ~/hyperledger-binaries/fabric- samples/basic-netw...
2020-03-25, 981🔥, 0💬

Blockchain Data Files on Peer Container
Where is the location of Blockchain Data Files on a Peer Container? We known that each peer container needs to maintain a copy of the ledger data for each channel it joined. Ledger data is divided into 2 parts: World State and Blockchain. The World State data is stored in a database, like Go LevelDB...
2020-05-29, 979🔥, 0💬

Start/Stop Hyperledger Fabric Dev Environment
How to start and stop Hyplerledger Fabric Dev Environment? You can follow this tutorial to start and stop Hyplerledger Fabric on Ubuntu. 1. Make sure the Docker Engine is running: $ ps -e | grep dockerd 17939 ? 00:39:58 dockerd $ docker info Containers: 6 Running: 4 Paused: 0 Stopped: 2 Images: 88 S...
2021-04-04, 976🔥, 0💬

Not All Member Peers Run Chaincode
How to find out which member peers are running a given chaincode? When a chaincode is instantiated on a channel, you don't need all member peers to install the chaincode and run it. But we have to have some member peers to install and run it. Otherwise, no transactions can be performed on this chain...
2019-04-17, 972🔥, 0💬

BYFN docker-compose-cli.yaml Configuration File
What is the docker-compose-cli.yaml Configuration File used in BYFN (Build Your First Network)? The docker-compose-cli.yaml Configuration File provides settings on Docker containers to run the BYFN network. Here is the default copy of docker-compose-cli.yaml provided in BYFN: # SPDX-License-Identifi...
2020-10-20, 971🔥, 0💬

View Channel Blockchain and Download Blocks
How to View Blockchain and Download Blocks of a Hyperledger Fabric Channel? You can follow this tutorial to View Blockchain and Download Blocks of a Hyperledger Fabric Channel. 1. Connect to the CLI container of the Hyperledger Fabric network: $ docker exec -it cli bash bash-4.4# 2. List channels jo...
2020-08-13, 971🔥, 0💬

"crypto-config.yaml" Environment Configuration File
What is the "crypto-config.yaml" Environment Configuration File? "crypto-config.yaml" is a Configuration File used to control the Hyplerledger Composer development environment. It is located in the "composer" sub-directory: $ cd fabric-dev-servers/fabric-scri pts/hlfv12/composer$ ls -l -rw-r--r-- 1 ...
2020-07-22, 970🔥, 0💬

Container Network - "net_basic"
What is the Container Network - "net_basic"? "net_basic" is a Docker container network consists of all containers related to Hyperledger Fabric network, basic-network. A container network groups containers together to help network communications among those containers. You can verify the "net_basic"...
2020-04-14, 969🔥, 0💬

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