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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, 319👍, 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, 317👍, 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, 315👍, 0💬

Hyperledger Composer Log File Location
Where are Hyperledger Composer Log Files located? Log files of the Hyperledger Composer developer environment is located in the "~/.composer/logs" directory. $ cd ~/.composer/logs $ ls -l -rw-rw-r-- 1 fyicenter 2257 Mar 31 19:49 trace_20190331.log -rw-rw-r-- 1 fyicenter 10482 Apr 1 13:05 trace_20190...
2020-12-02, 315👍, 0💬

"composer network start" Errors
Why am I getting errors when running the "composer network start" command? There are couple of reasons why you are getting errors when running the "composer network start" command to start business network. Error Example 1 - The business network NBA file was not deployed correctly, or has been remov...
2020-12-26, 313👍, 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, 306👍, 0💬

Business Network Archive (BNA) File
What is Business Network Archive (BNA) file? A Business Network Archive (BNA) file is ZIP file that contains all source code files for a Hyperledger Composer application called Business Network. For example, if you downloaded the Basic Sample Business Network as a BNA file as shown in the previous t...
2020-11-22, 299👍, 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, 298👍, 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, 292👍, 0💬

Revise Business Network Source Code
How to manage revisions of my Business Network? You can follow this tutorial to learn how to manage revisions of my Business Network properly. 1. Do not delete NBA files. They contains copies of source files of your business network. You should keep them as backups. $ cd tutorial-network $ ls -l *.b...
2020-12-26, 291👍, 0💬

"composer network install" Errors
Why am I getting errors when running the "composer network install" command? There are couple of reasons why you are getting errors when running the "composer network install" command to deploy business network BNA files. Error Example 1 - $ cd tutorial-network $ composer network install --card Peer...
2020-12-26, 290👍, 0💬

Hyperledger Composer Model File
What Is Hyperledger Composer Model File (*.cto)? A Hyperledger Composer model file is a source code file that define business object types used in a business network: Participants, Assets, Transactions and Events. A model file uses the CTO modeling language and the .cto file extension. Here is an ex...
2020-11-22, 290👍, 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, 289👍, 0💬

What is Hyperledger Composer Playground Server
What is Hyperledger Composer Playground Server? Hyperledger Composer Playground Server is a Web server that allows you to run and control your own Hyperledger Composer Playground. Hyperledger Composer Playground Server is included in the Hyperledger Composer tool set. It is normally installed as par...
2021-02-17, 287👍, 0💬

Hyperledger Composer Log Files
Where to find tutorials on Hyperledger Composer Log Files. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Composer Log Files. Hyperledger Composer Log File Location Peer Node Log File Location Peer Log Messages - Start Environment ...
2020-12-02, 287👍, 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, 283👍, 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, 282👍, 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, 280👍, 0💬

Hyperledger Composer Access Control File
What Is Hyperledger Composer Access Control (*.acl)? A Hyperledger Composer Access Control file is a source code file that define access control rules of which participant can access which assets and execute which transactions. A access control file uses the Access Control Language (ACL) and the .ac...
2020-11-22, 279👍, 0💬

Start Hyperledger Composer Playground Server
How to start and stop Hyperledger Composer Playground Server? The command that represents the Hyperledger Composer Playground Server is "composer-playground". You can start the server as shown below: $ composer-playground ... INFO :LoadModule :loadModule() Loading composer-wallet-filesystem from /us...
2021-02-17, 275👍, 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, 275👍, 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, 275👍, 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, 274👍, 0💬

Peer Node Log File Location
Where are Peer Node Log Files located? Log files of the Hyperledger Composer peer node in the Docker container that runs the peer node. You can use these commands find peer node log files: 1. Find the container id of the peer node: $ docker ps | grep peer 6bc4e52f82d0 hyperledger/fabric-peer:x86_64 -...
2020-12-02, 274👍, 0💬

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