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Questions tagged [hyperledger]

Hyperledger is an open source collaborative effort created to advance cross-industry blockchain technologies. It is a global collaboration, hosted by The Linux Foundation, including leaders in finance, banking, IoT, supply chain, manufacturing and technology.

Hyperledger is an open source collaborative effort created to advance cross-industry blockchain technologies. It is a global collaboration, hosted by The Linux Foundation, including leaders in finance, banking, IoT, supply chain, manufacturing and technology. (https://www.hyperledger.org/)

Code and documentation is available at: https://github.com/hyperledger

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Difference between various blockchain protocols

As the developers are constantly using different network protocols of blockchain such as Hyperledger, multichain, Ethereum, Corda, and others. Community will appreciate if the developers & blockchain enthusiasts can pour in some key differences…
Saurabh
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What's the difference between Hyperledger Fabric and Sawtooth?

Both Hyperledger Fabric and Hyperledger Sawtooth are platforms for building distributed ledger applications, supporting pluggable consensus mechanisms and smart contracts (chaincodes). What are the main differences between then? When to choose one…
Joaquim Oliveira
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Difference between hyperledger composer and hyperledger fabric?

I am java developer and new to hyperledger. I am interested in learning it and need to know where to start . fabric vs composer?
Robert Ravikumar
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PBFT algorithm in hyperledger

Can anyone explain PBFT Algorithm in detail without giving any link for the same? And how it works in hyperledger. So, once the transaction is sent to the blockchain: Who validates the transaction? How the consensus is achieved on the…
Saurabh
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Where do smart contracts reside in blockchain (Ethereum or Hyperledger)

So, let us consider a typical trade finance process flow. Exporter deploys a contract that has conditions of the shipment and a hash is generated once the deployment is finished. Questions: 1) Where is the contract stored? 2) How other…
Saurabh
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What is the difference between MSP and Fabric CA?

Is Fabric CA an implementation of MSP? Is an MSP useless by itself? What are the functions of the MSP and Fabric CA? And differences in those functions?
Jeff
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peer channel creation fails in Hyperledger Fabric

I am trying to set up a sample hyperledger fabric environment with an orderer and 2 peers. I am not using docker approach instead I am running the actual executable itself. Orderer and 2 peer nodes started successfully. However, channel creation…
sun
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What exactly Membership Service Provider (MSP) is in Hyperledger Fabric?

While reading the documentation on Hyperledger Fabric I couldn't understand what MSP is. It is really unclear to me what an MSP exactly is and how it differs from CA? What I understand is CA issue certificates and MSP says which of these are valid…
Adelin
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Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running? inside a Dockerfile

I have the following Dockerfile: FROM ubuntu ENV NPM_CONFIG_LOGLEVEL warn ENV admin_user="PeerAdmin" network_name=$1 version=$2 hversion=hlfv1 fabrik_path=/fabric-tools project_dir=$(pwd) ENV card_store_dir=$project_dir/.card-store…
abadraja
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How does "Coffee with Blockchain" match growers to buyers?

In the "Coffee with Blockchain" app produced by IBM it performs price matching between Growers and Buyers. I'm wondering how that matching would be implemented (either in the example app or in an actual implementation). Example of the app can be…
Rob Olmos
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Understanding Various Certificates in Hyperledger fabric

Hello I am tryin to use hyperledger fabric for a block chain implementation. I did the first-network demo and found lot of certificates in it. I have tried arranging them hierarchically in below picture. I Have some questions related to them Why…
Katiyman
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ERROR: manifest for hyperledger/fabric-orderer:latest not found

I am trying to start up network using following command ./network_setup.sh up channel After running this command I am receiving this errro ERROR: manifest for hyperledger/fabric-orderer:latest not found How I can remove this error?please help me
Narayan Ghimire
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how certificates get derived from the real fabric-ca-server certificate in hfc-key-store in hyperledger?

I'd like to explain what I understand correctly first and if I'm right, please tell me the truth and if I'm mistaken, tell me also that I'm mistaken. My explanation is about how hyperledger network and node sdk works together and how node sdk…
Nika Kurashvili
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Meaning of EnableNodeOUs in crypto-config.yaml?

Just wondering what the flag EnableNodeOUs means in crypto-config.yaml? eg: PeerOrgs: # --------------------------------------------------------------------------- # Org1 #…
Simon Mullaney
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Error: Cannot find module 'fabric-client'

After normal run the ./startFabric.sh(it shows as follow ): 2017-07-21 07:47:37.477 UTC [chaincodeCmd] chaincodeInvokeOrQuery -> INFO 00a Chaincode invoke successful. result: status:200 2017-07-21 07:47:37.477 UTC [main] main -> INFO 00b…
季谢尔
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