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"transaction" Data Type Declared in CTO
How to declare a "transaction" data type in the CTO model file? If you want your Hyplerledger Composer business network to accept a business transaction, you need to use the "transaction" CTO statement to declare a "transaction" data type in a CTO model file. The "transaction" data type specifies ho...
2021-06-05, ∼1297🔥, 0💬

Inspect Transaction Blocks of Channel Blockchain
How to Inspect Transaction Blocks of Channel Blockchain? You can follow this tutorial to Inspect Transaction Blocks of Channel Blockchain. 1. Connect to the CLI container of the Hyperledger Fabric network: $ docker exec -it cli bash bash-4.4# 2. Download (fetch) the newest block from "mychannel" cha...
2020-08-13, ∼1296🔥, 0💬

Peer Log Messages - Start Environment
How to verify peer node log messages to ensure my Hyperledger Composer developer environment is started correctly? You can follow this tutorial to verify peer node log messages generated during the Hyperledger Composer developer environment start up process. 1. Stop the environment: $ cd fabric-dev-...
2020-12-02, ∼1293🔥, 0💬

Explorer Hyplerledger Composer Environment
Where to find tutorials on Explorering Hyplerledger Composer Environment on Ubuntu. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Explorering Hyplerledger Composer Environment on Ubuntu. Control Hyplerledger Composer Environment Versions of H...
2020-07-22, ∼1291🔥, 0💬

Control Hyplerledger Composer Environment
What are the command scripts to control my Hyplerledger Composer development environment? If you have installed your Hyplerledger Composer development environment, with the fabric-dev-servers.tar.gz package, you have the following shell command scripts to control the envrionment: 1. ~/fabric-dev-ser...
2020-07-22, ∼1289🔥, 0💬

Hyperledger Composer Access Query File
What Is Hyperledger Composer Query File (*.qry)? A Hyperledger Composer Query file is a source code file that define queries to retrieve business objects from the Business Network. A access control file uses the Query language and the .qry file extension. Here is an example of an query file from the...
2020-11-22, ∼1286🔥, 0💬

"fabric-ca-client certificate list" - List Certificates
How to List Certificates with the "fabric-ca-client certificate list" command? If you want get a list of certificates from the Fabric CA Server, you can run the "fabric-ca-client certificate list" command: $ export FABRIC_CA_CLIENT_HOME=~/fabric -ca/native-client/admin$ ~/go/bin/fabric-ca-client cer...
2019-09-27, ∼1282🔥, 0💬

"gyp ERR! stack Error: EACCES: permission denied"
Why am I getting the "gyp ERR! stack Error: EACCES: permission denied" error when installing Hyplerledger Composer REST API Server? You may get the "gyp ERR! stack Error: EACCES: permission denied" error, when using older version of "npm" to install Hyplerledger Composer REST API server: $ sudo npm ...
2021-02-17, ∼1279🔥, 0💬

Basic Sample Business Network - SampleTransaction
How to submit SampleTransaction request to Basic Sample Business Network? You can follow this tutorial to submit SampleTransaction request to Basic Sample Business Network. 1. Open Hyperledger Composer Playground and go to Basic Sample Business Network home page, as shown in the previous tutorial. 2...
2020-12-22, ∼1279🔥, 0💬

"transaction" Process Function Defined in JS
How to define a "transaction" process function in the JS scripting file? If you want your Hyplerledger Composer business network to process a business transaction, you need to the "function" JavaScript statement to define a "transaction" process function in a JS scripting file. When Hyplerledger Com...
2021-06-05, ∼1276🔥, 0💬

"yo" Command to Generate Business Network
How to generate required source code files for a new business network with Hyperledger Composer command line tools? You can use the "yo" command line tool to generate required source code files for a new business network as shown below. 1. Run "yo" command with the "hyperledger-composer:business netw...
2021-02-04, ∼1275🔥, 0💬

Reinstall basic-network with Latest Images
How to Reinstall basic-network with Latest Images? You follow this tutorial to Reinstall basic-network with Latest Images. 1. Run teardown.sh script to remove containers and their images related to the basic-network: $ cd ~/hyperledger-binaries/fabric- samples/basic-network$ ./teardown.sh Removing p...
2020-04-14, ∼1275🔥, 0💬

Hyperledger Fabric Process Flow
Where to find tutorials on Hyperledger Fabric Process Flow? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Fabric Process Flow. What Is Hyperledger Fabric Query   ⇒ What Is Hyperledger Fabric Query ⇐ Organization with CLI Admin To...
2020-01-29, ∼1265🔥, 0💬

Basic Sample Business Network - SampleEvent
How to view SampleEvent emitted from Basic Sample Business Network? You can follow this tutorial to view SampleEvent emitted from Basic Sample Business Network. Since SampleEvent is generated by the SampleTransaction process, it is recorded as a child object to the SampleTransaction record. 1. Open ...
2020-12-15, ∼1256🔥, 0💬

Building Business Network with Hyperledger Composer
Where to find tutorials on Building Business Network with Hyperledger Composer. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Building Business Network with Hyperledger Composer. "yo" Command to Generate Business Network "composer archive" to...
2021-02-04, ∼1248🔥, 0💬

Install Hyplerledger Composer Environment
Where to find tutorials on installing Hyplerledger Composer Environment on Ubuntu. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on installing Hyplerledger Composer Environment on Ubuntu. Hyplerledger Composer Environment Requirement Install Com...
2021-05-04, ∼1242🔥, 0💬

"transaction" Process Function Syntax
What is the syntax of "transaction" process function in the JavaScript file? A "transaction" process function is a regular JavaScription function that has two extra decorators: "@transaction" and "@param". Here is the syntax of a "transaction" process function statement: /* @transaction * @param {tr...
2021-06-05, ∼1236🔥, 0💬

Hyperledger Composer Environment Orgs and Users
What Orgs and Users are included in my Hyperledger Composer Environment? The fabric-dev-servers.tar.gz package includes two default organizations and one admin user for each organization: org1.example.com - "org1.example.com" is the organization owns the peer node "peer0.org1.example.com". "org1.exa...
2020-07-14, ∼1228🔥, 0💬

What Is JS Scripting Language
What is Business Network JS Scripting Language? Business Network JS Scripting Language is the standard JavaScript language to define business logics on how each transaction is processed. JavaScript source code can be stored in a single or multiple files with the *.js file extension. Each JavaScript ...
2021-06-05, ∼1205🔥, 0💬

Hyperledger Composer Playground Server
Where to find tutorials on Hyperledger Composer Playground Server. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Composer Playground Server. What is Hyperledger Composer Playground Server Start Hyperledger Composer Playground Serv...
2021-02-17, ∼1205🔥, 0💬

View "console.log()" Output in Playground
How to view "console.log()" Output in Hyperledger Composer Playground? If you use "console.log()" to print out debug information in your transaction process functions, you can follow this tutorial to see the "console.log()" in Hyperledger Composer Playground. 1. Add the following CTO modeling file t...
2021-06-05, ∼1200🔥, 0💬

Hyplerledger Composer Environment Requirement
What are requirements for installing the a Hyplerledger Composer development environment? Here are requirements for installing the a Hyplerledger Composer development environment: Operating System - Ubuntu Linux 14.04 / 16.04 LTS, or Mac OS 10.12. Docker Engine - Version 17.03 or higher. Docker Engi...
2021-05-04, ∼1195🔥, 0💬

Versions of Hyplerledger Composer Environment
How many versions do I have with my Hyplerledger Composer development environment? The installation package fabric-dev-servers.tar.gz actually provides 3 versions of Hyplerledger Composer development environment. You can them in the "fabric-scripts" sub-directory: $ cd fabric-dev-servers $ ls -l fab...
2020-07-22, ∼1181🔥, 0💬

Verify Hyperledger Composer Prerequisites on Ubuntu
How to verify Hyplerledger Composer Prerequisites on Ubuntu? You can use the following commands to verify Hyplerledger Composer Prerequisites on Ubuntu: 1. Verify Docker Engine: $ docker --version Docker version 18.09.2, build 6247962 $ ps -e | grep dockerd 17939 ? 00:39:58 dockerd 2. Verify Docker ...
2021-05-04, ∼1158🔥, 0💬

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