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Questions tagged [hyperledger-fabric]

Hyperledger Fabric is an implementation of blockchain technology. Use this tag for questions about this project.

Use this tag for questions about this project.

Another good idea is to reach out to the community at

Documentation can be found at

Refer development lifecycle and officially provided resources at

6206 questions
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Are Kafka Partition Logs really immutable? To make it really immutable, can the logs be integrated with distributed ledger?

Are Kafka Partition Logs really immutable? To make it really immutable, is it possible that these partition logs be integrated with distributed ledger such as Quorum, Hyperledger Fabric or Corda? Understand that Kafka uses Zookeeper which uses Raft…
Nathan Aw
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Channel:mychannel received discovery error:access denied for role `member`

I am trying to understand correlation of policies (org, application & channel) with identities, MSP and NodeOUs in complete process flow of hyperledger fabric. I am sharing my understanding, please correct me if I am wrong. Presently, hf support 4…
Avoid
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DNS resolution failed while implementing API Server for Hyperledger Fabric Network using the AWS managed blockchain?

I have a chaincode installed and running over EC2 instance, which was accomplished using an AWS managed blockchain. Fabric client side: I kept the EC2 instance acting as the fabric client side. It has a connection profile, package.json, app.js. I…
Aldo
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Error while trying to install smart contract using npm run cc:start -- supplychain

I am new to blockchain and we are using hyperledger fabric to run it. The project instructions read: npm i //to install dependencies npm run env:restart //Create a new development blockchain network - From the root of your project npm run…
Avantika Gargya
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Hyperledger 2.0: reconciliation error when trying to fetch missing items from different peers: Empty membership

I have 3 Orgs with currently 1 peer per org running and one Orderer. I have a private data collection defined for 2 orgs. "name": "privateOrg1-2", "policy": "OR('Org1MSP.member','Org2MSP.member')", "requiredPeerCount": 0, "maxPeerCount":…
Fedor Petrov
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Node client "Endorsement has failed error" submitting transaction - HLF Minikube

I'm testing my chaincode in a node client app but I'm not able to submit a transaction. Everything works fine if I invoke/query the chaincode within my peer pods, but if i try to do it in my node client, only the querying works. I have 1 orderer…
Pedro Almeida
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Authentication Mechanism in Hyperledger Fabric based Web and Mobile application

How to implement User Authentication in Hyperledger Fabric based Web and Mobile application? We know that Fabric CA returns Private key and Certificate on user registration. What are the possible ways of authenticating users in Hyperledger Fabric…
Sanjay
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Error parser block with configtxlator Hyperledger Fabric 1.4.6

I have deployed fabcar example, with Raft consensus algorithm. I ran peer channel fetch without problems. I can see that the retrieved block is number 8, and that the information has been written to the file mychannel.block. When I run the command…
hugo68
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Deploy a multihost Hyperledger Fabrc Blockchain network without Docker Swarm

I am facing a hard time trying to deploy a multihost Hyperledger fabric network using a cjdns ipv6 tunnelling. I was able to successfully deploy a multihost network using docker swarm, but for my point of view docker swarm is not very practical in…
George Misiakoulis
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Hyperledger fabric: Removing the test data from the network

How do we normally remove/clear all the test data from the Hyperledger Fabric network?. we do the following approach to run the tests (assuming an HLF network is up and running) Run the e2e test against the network If the test passes all the rules…
shamon shamsudeen
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'.' is not recognized as an internal or external command,

npm start > server@1.0.0 start C:\Users\07\OneDrive\Desktop\Final Try\fabcar-blockchain-sample\web-app\server > ./node_modules/nodemon/bin/nodemon.js src/app.js '.' is not recognized as an internal or external command, operable program or batch…
jeevan kotian
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Failed to register user user1.Failed to get Affiliation

PS C:\Users\07\OneDrive\Desktop\Final Try\fabcar-blockchain-sample\web-app\server> node registerUser.js Wallet path: C:\Users\07\OneDrive\Desktop\Final Try\fabcar-blockchain-sample\web-app\server\wallet Failed to register user user1: Error:…
jeevan kotian
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How to notify client of block commit and/or transaction status using events in HLF?

I am working on a client that needs to be notified of the status of any given blockchain transaction. To that end I am learning how to make use of events to achieve this. I tried referring to the official documentation on events in HLF 1.4 (found…
ohseekay
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Is Docker Maximum container size 100GB?

I am working on Hyperledger Fabric ver 1.4, my server freeze when many transactions are been done. My understanding is that the old transactions or versions which are committed do not get removed but stay in the docker using disk space ( I might be…
Janith Shanilka
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How can I deploy a web app to interect with hyperledger fabric v1.4?

I have the chaincode (go) and first-network codes. But now I need a web app.
luisfelipe
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