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Fabric Network without CA Server
Can I run a Hyperledger Fabric Network without Fabric CA Server? Yes, you can run a Hyperledger Fabric Network without Fabric CA Server. In that case, you have to manage PKI certificate services manually For example, you need to do the following manually to add a new user to access your ledger peer:...
2019-10-18, ∼1927🔥, 0💬

Inspect Docker Container Configuration
How to Inspect the Configuration of a Docker Container? You can use the "docker inspect" command to view the Configuration of a given Docker Container. For example, Let's look at the configuration of the peer0.org1 container of the BYFN network. $ docker inspect peer0.org1.example.com [ { "Id": "b81...
2020-05-29, ∼1926🔥, 0💬

evaluate-transaction.js - Evaluate Chaincode Transaction
How to write a Node.js script to evaluate a transaction defined in the Invoke method of a chaincode? Here is sample Node.js script, evaluate-transaction.js, that uses a given user identity from the local wallet to evaluate a transaction on chaincode. /* Copyright (c) FYIcenter.com */ 'use strict'; c...
2019-04-22, ∼1925🔥, 0💬

Switch Default Peer with Scripts
How to Switch Default Peer on the CLI container with Scripts? I am tired of typing those 4 CORE_PEER_* export commands. From previous tutorial, we know that we need to type in export commands to set 4 CORE_PEER_* environment variables. But you can also put them into shell scripts and run them whenev...
2020-05-29, ∼1923🔥, 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, ∼1915🔥, 0💬

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, ∼1912🔥, 0💬

Watch Chaincode Container Log
How to watch the log file of chaincode Container Log? You can follow this tutorial to watch the log file of a chaincode container: 1. Set up new terminal on the hosting system to follow the log file of the chaincode container linked to "peer0.org1": $ docker ps --all | grep dev-peer0.org1 cc7aeb60bb...
2020-06-08, ∼1910🔥, 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, ∼1905🔥, 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, ∼1902🔥, 0💬

Deploy couchdb Container Manually
How to Deploy couchdb as a Docker container manually? You can follow this tutorial to Deploy couchdb as a Docker container manually. 1. Verify the configuration of the couchdb container defined in the docker-compose.yml file: $ cd ~/hyperledger-binaries/fabric- samples/basic-network$ more docker-com...
2020-07-03, ∼1901🔥, 1💬

orderer.yaml - Orderer Peer Configuration File
What is the Orderer Peer Configuration File, orderer.yaml? The Orderer Peer Configuration File, orderer.yaml, provides settings to control the behavior of the Orderer peer. You can take a copy of the orderer.yaml provided in Fabric binary and sample package: $ cd fabric-orderer $ cp ~/hyperledger-bi...
2019-09-04, ∼1901🔥, 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, ∼1900🔥, 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, ∼1900🔥, 0💬

WYFA (Writing Your First Application)
Where to find tutorials on WYFA (Writing Your First Application) Network? I need help to follow the document provided at hyperledger-fabric.readthedocs .ioWebsite. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on WYFA (Writing Your First Applica...
2020-03-15, ∼1899🔥, 0💬

"docker image inspect" - Inspect Image
How to Inspect an Image in the local repository with "docker image inspect" command? You can get more information from an image using the "docker image inspect" command with a given image name or ID: fyicenter$ docker image inspect hello-world [ { "Id": "sha256:fce289e99eb9bca977dae1 36fbe2a82b6b7d4c...
2019-03-31, ∼1898🔥, 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, ∼1894🔥, 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, ∼1894🔥, 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, ∼1893🔥, 0💬

"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, ∼1892🔥, 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, ∼1892🔥, 0💬

Issue to Install "npm 5.x" on Ubuntu 18
Why I can only install "npm 3.5.2" on Ubuntu 18? If you are running Ubuntu 18, the default "apt install npm" command will only insatlle "npm 3.5.2: $ sudo apt install npm ... installing the "npm" package $ sudo apt install npm Reading package lists... Done Building dependency tree Reading state info...
2021-04-04, ∼1891🔥, 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, ∼1885🔥, 0💬

"docker container logs" - Fetch Logs
How to fetch log messages from a container with the "docker container logs" command? Most Docker container applications print log messages to its console to report statuses and debug information. You can fetch log messages from a container with the "docker container logs" command at any time, even a...
2019-04-29, ∼1885🔥, 0💬

Upgrade/Downgrade Python in Conda on nvidia/cuda Docker
How to Upgrade or Downgrade Python in Conda on nvidia/cuda Docker? If you need to run a specific version of Python, you can Upgrade or Downgrade Python Conda on nvidia/cuda Docker as shown in this tutorial. 1. Attach a terminal to the running docker. fyicenter# docker exec -it my_cuda /bin/bash (bas...
2023-02-21, ∼1883🔥, 1💬

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