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Install Demo Business Networks in Playground
How to install other Business Network demo in Hyperledger Composer Playground? Hyperledger Composer offers many other demo Business Networks. You can follow this tutorial to install any of them in Hyperledger Composer Playground. 1. Open Hyperledger Composer Playground. You see a list of Business Ne...
2020-12-15, ∼1496🔥, 0💬

Turn on Orderer Peer Operation RESTful API
How to Turn on Orderer Peer Operation RESTful API? You can follow this tutorial to Turn on Orderer Peer Operation RESTful API. 1. Update Docker Compose YAML file, docker-compose-default.yaml to override the "operations" settings: $ cd fabric-orderer $ vi docker-compose-default.yaml # Copyright (c) F...
2019-05-14, ∼1496🔥, 0💬

Contents of Hyperledger Fabric Binary Package
What contents are included in the Hyperledger Fabric Binary Package? Here is the directory list of the Hyperledger Fabric Binary Package: $ cd ~/hyperledger-binaries/fabric- samples$ ls -l -rw-rw-r-- 1 fyicenter 597 Apr 1 23:01 CODE_OF_CONDUCT.md -rw-rw-r-- 1 fyicenter 961 Apr 1 23:01 CONTRIBUTING.m...
2020-01-21, ∼1494🔥, 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, ∼1493🔥, 0💬

Orderer Peer Operation RESTful API
What is Orderer Peer Operation RESTful API? The Orderer Peer Operation RESTful API is RESTful Web service provided by an orderer peer. It is different than and separated from the primary orderer Web service provided by the orderer peer. orderer Peer Operation RESTful API exposes the following functi...
2019-05-14, ∼1493🔥, 0💬

"asset" CTO Statement Syntax
What is the syntax of the "asset" CTO Statement The "asset" statement declares a generic data type to represent primary data entities that can be referenced with their unique IDs. Here is the syntax of an "asset" statement: [abstract] asset type_name [identified by id_name] | [extends super_type] { ...
2021-08-01, ∼1492🔥, 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, ∼1491🔥, 0💬

See New Paper on CouchDB Server
How to See New Paper on CouchDB server? If you are the PaperNet admin, you may want to see the world state of the asset managed by papercontract. PaperNet uses CouchDB to store the world state and configured with a REST API on port 5984. 1. List all databases: (magnetocorp admin)$ curl http://localh...
2019-11-21, ∼1490🔥, 0💬

Create Orderer Organization Definition
How to Create Orderer Organization Definition? You can follow this tutorial to Create Orderer Organization Definition. 1. Instead of creating a new MSP entry for the orderer, you can borrow the one created in BYFN tutorials: $ mkdir fabric-orderer $ cd fabric-orderer $ cp -r ~/hyperledger-binaries/f...
2019-09-04, ∼1489🔥, 0💬

CORE_PEER_* Environment Variables on BYFN CLI
What is the default peer and how to change it on the BYFN CLI container? On the BYFN CLI container, you can manage other peer nodes with the "peer" command. When you run a "peer" command, it will connect to the default peer node define by these environment variables: CORE_PEER_ADDRESS=peer0.org1.e xa...
2020-09-30, ∼1488🔥, 0💬

"configtx.yaml" Environment Configuration File
What is the "configtx.yaml" Environment Configuration File? "configtx.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 fyicenter ...
2020-07-22, ∼1488🔥, 0💬

"PeerAdmin@hlfv1" - Peer Admin Access Card
What is Peer Admin Access Card "PeerAdmin@hlfv1"? "PeerAdmin@hlfv1" is a special Business Network Card that has special permission to deploy new Business Network to the peer node, "peer0.org1.example.com" in your Hyperledger Composer Developer Environment? "PeerAdmin@hlfv1" card can be created with ...
2020-07-14, ∼1488🔥, 0💬

Connect to Local Playground Server
How to connect to my local Hyperledger Composer Playground Server? When your local Hyperledger Composer Playground Server is started, it listens to the 8080 port by default. So you can connect to the server with a Web browser on the local system, using the following address: http://localhost:8080 If...
2021-02-17, ∼1481🔥, 0💬

Pull Hyperledger Fabric Orderer Image
How to Pull Hyperledger Fabric Orderer Image from docker hub? You can follow this tutorial to Pull Hyperledger Fabric Orderer Image from docker hub. 1. Check the Docker local repository: $ docker image list | grep fabric-orderer hyperledger/fabric-orderer latest ec4ca236d3d4 2 weeks ago 173MB hyperl...
2019-09-04, ∼1478🔥, 0💬

Requirements for Registering New Identities
What are requirements for Registering New Identities? With the Fabric CA Client tool, you can register new identities on the Fabric CA Server, if you meet the following requirements: 1. You, as the registrar, must have an identity in your wallet that has the "hf.Registrar.Roles" attribute with a val...
2019-09-16, ∼1477🔥, 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, ∼1475🔥, 0💬

View Logs Files of basic-network
How to view logs files of the example network, basic-network? The example network, basic-network, consists of 4 Docker containers. You can view the log file on each container. 1. View log file of the orderer container: $ docker logs orderer.example.com [orderer.common.server] prettyPrintStruct -&...
2020-04-14, ∼1473🔥, 0💬

Hyperledger Related Terminology
Hyperledger Related Terminology: Asset - An Asset is a data object with a unique identifier. The content of an asset can be anything from a simple numeric value to a complex data object. For example, an asset can represent a financial asset, like a bank account in a bank system. Blockchain - A Block...
2020-01-21, ∼1472🔥, 0💬

Warning on Incompatible "npm" Version
Why I am getting the Incompatible "npm" Version warning with installating Hyplerledger Composer CLI on Ubuntu? You may get the Incompatible "npm" Version warning, if you install Hyplerledger Composer CLI with the "@0.20" version option: $ sudo npm install -g composer-cli@0.20 WARN engine composer-cl...
2021-04-04, ∼1469🔥, 0💬

Hyperledger Composer Script File
What Is Hyperledger Composer Script File (*.js)? A Hyperledger Composer script file is a source code file that define business logics on how each transaction is processed. A script file uses the JavaScript language and the .js file extension. Here is an example of a script file from the Basic Sample...
2020-11-22, ∼1469🔥, 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, ∼1467🔥, 0💬

Build and Run "Hello" Go Program
How to Build and Run "Hello" Go Program on Ubuntu? Hyperledger Fabric framework is written in Go language. So it is important to learn how build and run Go programs on Ubuntu. Here are the steps to build and run the "Hello" Go program. 1. Make sure that Go is installed. $ go version go version go1.1...
2020-05-15, ∼1465🔥, 0💬

Verify the WYFA Network
How to Verify the Hyperledger Fabric Network to run the WYFA (Writing Your First Application) tutorial? You can follow these steps to verify the Hyperledger Fabric Network to run the WYFA (Writing Your First Application) tutorial. 1. Connect to the CLI container: $ docker exec -it cli bash bash-4.4#...
2020-02-29, ∼1464🔥, 0💬

Interfaces to Communicate with Ledger Peer
Where to find tutorials on Interfaces to Communicate with Ledger Peer? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Interfaces to Communicate with Ledger Peer. Main Interfaces to Communicate with Ledger Peer Download and Install Golang SDK D...
2020-01-29, ∼1463🔥, 0💬

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