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"composer card" Commands
What can I do with "composer card" command? "composer card" commands are part of the Composer CLI command set. It allows you to manage access cards stored in the Composer Wallet, which is located at "~/.composer/cards" directory. Here is the syntax of the "composer card" commands: $ composer card he...
2020-07-22, 371👍, 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, 292👍, 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, 291👍, 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, 284👍, 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, 283👍, 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, 276👍, 0💬

Create "PeerAdmin@hlfv1" Card Manually
How to create the "PeerAdmin@hlfv1" card manually? If you don't want to use the "createPeerAdminCard.sh" script to create the "PeerAdmin@hlfv1" card automatically, you can follow this tutorial to create it manually. 1. Create connection profile "connection.json": $ mkdir ~/card $ cd ~/card $ vi conn...
2020-07-14, 368👍, 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, 358👍, 0💬

Hyperledger Composer Environment Channels
What Channels are included in my Hyperledger Composer Environment? In the fabric-dev-servers.tar.gz package, only one channel, "composerchannel", is created in the Hyperledger Composer Developer Environment. The peer node peer0.org1.example.com has been configured to this channel. You can only deplo...
2020-07-14, 348👍, 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, 286👍, 0💬

Hyperledger Composer Environment Components
What components are included in my Hyperledger Composer Environment? The fabric-dev-servers.tar.gz package provides the 4 components running as Docker containers to form your Hyperledger Composer Environment. You can identify Hyperledger Composer by their container names from the output of the "dock...
2020-07-14, 282👍, 0💬

Watch "orderer" Container Log
How to watch the log file of the "orderer" Container? The "orderer" Container plays an important role in a Hyperledger Fabric network. You can follow this tutorial to watch its log file: 1. Set up a new terminal on the hosting system to follow the log file of the "orderer" container: $ docker logs -...
2020-07-07, 506👍, 0💬

Hyperledger Fabric Docker Containers
Where to find tutorials on Hyperledger Fabric Docker Containers? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Fabric Hyperledger Fabric Docker Containers. Types of Hyperledger Fabric Docker Containers Watch "orderer" Container Lo...
2020-07-07, 438👍, 2💬

💬 2020-07-03 chelseaclark: Creative Bioarray provides a rapid, high-throughput slide scanning service for different kinds of application. The whole slide s...

💬 2020-07-03 chelseaclark: G-banding is a technique used in cytogenetics to produce a visible karyotype by staining condensed chromosomes. It is useful for...

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, 428👍, 0💬

Types of Hyperledger Fabric Docker Containers
How many types of Hyperledger Fabric Docker Containers are there? In a typical Hyperledger Fabric network (using goleveldb instead of couchdb), you will have 4 types containers running on the Docker Engine: 1. Orderer container - In a simple Hyperledger Fabric network, there is only one Orderer cont...
2020-07-07, 343👍, 0💬

Peer Containers Not Joined to Channel
Can I stop Peer Containers That Are Not Joined to Channel? Yes. You can stop Peer Containers That Are Not Joined to Channel. For example, you have 1 channel, "mychannel", and 4 peers. You know that only 2 of them are joined to the channel. You can stop the other peer containers. 1. List all peer con...
2020-07-07, 322👍, 0💬

Auto-Start of Required Chaincode Container
Why a chaincode container is automatically started? A chaincode container will be automatically started, if a chaincode is invoked and the chaincode container's peer is a required peer for the chaincode. Let's continue with the previous tutorial to see this behavior. 6. Stop the chaincode container ...
2020-07-03, 459👍, 2💬

💬 2020-07-03 chelseaclark: Creative Bioarray provides a rapid, high-throughput slide scanning service for different kinds of application. The whole slide s...

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, 378👍, 1💬

CouchDB Container Used in Hyperledger Fabric
What is the CouchDB container used in Hyperledger Fabric network? If you are using CouchDB instead of Go LevelDB, your Hyperledger Fabric network will have another type of containers: 5. CouchDB container - There is one CouchDB container connected to a peer. Each CouchDB stores the World State for t...
2020-07-03, 387👍, 1💬

💬 2020-07-03 chelseaclark: Broad-range real-time PCR and sequencing of the 16S rRNA gene region is a widely known method for the detection and identificati...

Peer and CouchDB Container Dependency
Which Peer container depends which CouchDB container in BYFN network? If you are running BYFN (Build Your First Network) with the CouchDB option, the Peer and CouchDB Container Dependency is defined in the "docker-compose-couch.yaml" file. $ cd ~/hyperledger-binaries/fabric- samples/first-network$ m...
2020-07-03, 360👍, 1💬

💬 2020-07-03 chelseaclark: Our high-quality animal probes can help describe the temporal and spatial patterns of gene expression in animal cells and tissue...

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, 492👍, 0💬

Query CouchDB Container API Directly
How to query CouchDB Container API directly? If you are running BYFN (Build Your First Network) with the CouchDB option, the World State of each peer node is stored a CouchDB server running as Docker container. The CouchDB server supports a REST API interface at the local port 4369, which is mapped ...
2020-06-08, 387👍, 0💬

Invoke Operation on Chaincode Container
Which chaincode container runs the chaincode invoke operation? The chaincode "mycc" instance is configured in the BYFN (Build Your First Network) to run in both chaincode containers when one of their peers receives the "Invoke" call. 1. Set up a terminal on the hosting system to follow the log file ...
2020-06-08, 353👍, 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, 426👍, 0💬

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