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Uninstall Chaincode on BYFN Peers
How to uninstall chaincodes on BYFN Peers? Unfortunately, the BYFN CLI "peer chaincode" command does offer any option to uninstall chaincodes from a given peer. You have two options when your chaincodes from different peers are out of sync or incompatible: 1. Destroy chaincode instance and re-instal...
2020-09-15, ∼1428🔥, 0💬

What Is Blockchain
What Is Blockchain? A blockchain is a growing list of data blocks that are cryptographically chained together. A blockchain has the following main features: A data block has a header and a list of data transactions. Merkle hash tree is used to store a fingerprint of all transactions in the block hea...
2022-03-29, ∼1426🔥, 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, ∼1426🔥, 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, ∼1426🔥, 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, ∼1423🔥, 0💬

Check "couchdb" Database Server
How to Check the "couchdb" Database Server? The "couchdb" database server supports a REST API. We can use it to look at its data. 1. Find out the REST API port number of the "couchdb" server container: $ docker ps | grep couchdb hyperledger/fabric-couchdb 4369/tcp, 9100/tcp, 0.0.0.0:5984-&gt;598...
2020-03-25, ∼1421🔥, 0💬

Deploy orderer.example.com Manually
How to Deploy orderer.example.com as a Docker container manually? You can follow this tutorial to Deploy orderer.example.com as a Docker container manually. 1. Verify the configuration of the orderer.example.com container defined in the docker-compose.yml file: $ cd ~/hyperledger-binaries/fabric- sam...
2020-03-25, ∼1420🔥, 0💬

Introduction to Hyperledger
Where to find tutorials as Introduction to Hyperledger. Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team as Introduction to Hyperledger. What Is Hyperledger What Is Blockchain What Is Distributed Ledger What Is Smart Contract   ⇒ What Is Hyperledge...
2019-04-19, ∼1420🔥, 0💬

Create Identity Wallet for Isabella
How to Create Identity Wallet for Isabella at MagnetoCorp? Once Isabella gets a copy of the private key and the certificate that represents her identity, User1@org1.example.com, on the PaperNet, she needs to put them in a local wallet. Whenever Isabella runs an application, it will open the wallet a...
2019-11-21, ∼1419🔥, 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, ∼1418🔥, 0💬

Impact of Stopping Chaincode Container
What is the impact of stopping a chaincode container of a peer? We know that if a Peer has chaincode installed, it will run it as chaincode container to help the channel to perform a transaction on the chaincode. If you stop a chaincode container of a peer who is not a required member of the chainco...
2019-04-17, ∼1408🔥, 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, ∼1403🔥, 0💬

Manage basic-network with cli Container
How to Manage basic-network with cli Container? You can follow this tutorial to Manage basic-network with cli Container. 1. Start all containers, including cli, defined in the docker-compose.yml file: $ cd ~/hyperledger-binaries/fabric- samples/basic-network$ docker-compose -f docker-compose.yml up ...
2020-03-15, ∼1397🔥, 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, ∼1397🔥, 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, ∼1396🔥, 0💬

"peer chaincode invoke" on BYFN
How to run "peer chaincode invoke" to invoke the transaction on the chaincode instance? After a chaincode in properly installed on all peers and instantiated on the channel, you can run the "peer chaincode invoke" to invoke the transaction on the chaincode instance. 1. Verify instantiated chaincode:...
2020-08-13, ∼1388🔥, 0💬

Verify Blockchain on the Channel
How to Verify Blockchain on the Channel? Since all transactions (changes of assets managed by chaincodes) are stored in the blockchain shared by all peers of the channel, you can use the "peer channel" CLI command to look at them. 1. Connect to CLI container: $ docker exec -it cli bash root@262918fd...
2020-02-20, ∼1388🔥, 0💬

Start CLI Container for MagnetoCorp Admin
How to Start CLI Container for the MagnetoCorp Administrator? If you are the administrator from MagnetoCorp and want to manage the PaperNet Hyperledger Fabric network, you can follow this tutorial. 1. Create a new terminal window and run the docker-compose command to start the CLI container: (magnet...
2019-12-19, ∼1388🔥, 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, ∼1385🔥, 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, ∼1384🔥, 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, ∼1383🔥, 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, ∼1383🔥, 0💬

Invoke Chaincode Transaction on BYFN Channel
How to Invoke Chaincode Transaction on BYFN Channel? An instance of a chaincode can be viewed as an object of a class in an execution environment. It can hold transaction operations to manage its properties. You can run the "peer chaincode invoke" command to invoke the "Invoke" operation of a given ...
2020-09-30, ∼1382🔥, 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, ∼1382🔥, 0💬

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