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Questions tagged [quorum]

Q&A related to Quorum, the permissioned Go implementation of Ethereum supporting data privacy.

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how can I measure a function execution time based on truffle

I'm using truffle to test my smart contract written in solidity language deployed on the Quorum blockchain. I want to measure the execution time of the invocation of a function using truffle. Is ...
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Opening Smart Contracts on Quorum via json rpc api eth_sendtransaction for Integration Purposes

if I wish to integrate quorum blockchain with other platforms via the json rpc api eth_sendtransaction method, what other implications can there be? Assuming the smart contract built is secured and ...
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1answer
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Passing data between two Ethereum networks

I have some IoT(Internet of things) nodes sharing the received data from sensors with each others. I partitioned them to 2 permissioned networks: Network 1 includes: X,Y,Z nodes trusting each other,...
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1answer
28 views

In Quorum, is it possible to replicate a private smart contract to a new node after the contract is deployed?

This question is about Quorum. I noticed that the quorum tag is present on this site hence adding the question here. If this question should rather be asked elsewhere, please let me know. I am ...
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1answer
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Quorum 7nodes example unable to attach to geth node 1,2,4,5,6,7 but node 3 is working

Quorum 7nodes example all of sudden gave fatal error unable to attach to remote geth. Problem: can't attach to geth node Every time I import metamask account to geth node (using personal.importRawKey(...
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Quorum 7node example when i try to import account1 of node1 using its key1 ciphertext i get wrong account address imported

I am trying to import account 1 of node1 of 7nodes quorum example using its key1 file which you can find here "https://github.com/jpmorganchase/quorum-examples/tree/master/examples/7nodes/keys". my ...
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1answer
28 views

How to import quorum 7 node accounts to metamask

I am new to quorum 7node example I have created a DApp I want to send transaction using metamask when I was using testrpc to connect with DApp i was able to see all 10 test accounts in metamask after ...
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vagrant up failed to add key

After vagrant up command gpg: keyring /tmp/tmp_tiuuca1/secring.gpg' created default: gpg: keyring/tmp/tmp_tiuuca1/pubring.gpg' created default: gpg: requesting key 923F6CA9 from hkp server ...
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How to connect Quorum nodes with Remix?

I'm trying to use the Quorum-examples/7nodes to test my contract. I followed the step on github and open a terminal to attach to node1. https://github.com/jpmorganchase/quorum-examples/tree/master/...
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1answer
37 views

External Access To A Private Etherium Blockchain

Background Info I have been playing around with Etherium and I have created a DAPP on the Etherium blockchain inside Azure Kubernetes. Everything up to this point has been a good experience but the ...
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1answer
49 views

how can I store a data in quorum smart contract that no one can see it [duplicate]

I want to store a number in smart contract that blockchain nodes should guess that number and send it to smart contract and then smart contract should compare it with data stored in it, and if they ...
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Decentralized x509 standard ERC

I am looking at coming up with a ERC standard to define X509 standards. Understand there is ERC725, ERC 735. Wanted to know if there are any existing ERC standards for this?
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How to secure ethereum data at rest, in transit and in use? [closed]

How to secure ethereum data at rest, in transit and in use? Perhaps for data at rest through disk encryption? For in transit, through end to end HTTPS? Finally, data in use through the use of ...
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24 views

Quorum/DApp Running in Secure Enclaves Such as Google Asylo

To secure the geth nodes and the keystores, can we run constellation and geth nodes within secure enclaves such as Google Asylo? Or perhaps the DApp or Smart Contract could run in the secure ...
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1answer
20 views

Is Data Stored on Ethereum encrypted or only RLP encoded?

Is Data Stored on Ethereum encrypted or only RLP encoded? If data is not encrypted, is there some way to secure and encrypt it using AES encryption algorithm in cipher block chaining (CBC) or XTS mode ...
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2answers
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Is there a benchmarking tool to make some tests on the 7nodes quorum-example running on vagrant?

I set my quorum network using 7nodes quorum-example running on vagrant. Now, I need a testing tool to evaluate my implementation (TPS, latency, ...). I tried some tools but every time I have problems: ...
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1answer
25 views

Data Search Complexity in Ethereum

I am new to Ethereum and wish to know that how is data for a smart contract fetched in Ethereum Blockchain. When we store the value of a variable in a smart contract, say simple storage (https://...
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1answer
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Save temporarily-shareable private data using Quorum

Can we use Quorum (or any other Ethererum variation) to save private data that can be shared with other parties for a temp period? The use case is that: A patient can share his medical data that is ...
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1answer
19 views

Is there a way to have RPC exposed on Geth such that it can only receive signed transactions?

Is there a way I can configure my geth node RPC to only receive signed transactions? The goal here is to run a Quorum network where the private state of a node is not visible over RPC. Though the RPC ...
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1answer
86 views

Who has authority to add a new node in Quorum

According to this tutorial of Quorum a regulator is able to view the result of voting. 1) What else responsibilities does regulator have? 2) How is the regulator selected from the participants of ...
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1answer
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Quorum privateFor not working with truffle-hd-wallet-provider

I'm trying to deploy a contract private to one node in the Quourm 7-nodes example. The migrate works as expected when deployed normally with truffle, but ignores the privateFor part and deploys a ...
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1answer
54 views

Deploying ERC 725 (Blockchain Identity IDs) on Quorum?

I refer to ERC 725 -- Blockchain for Identity. From a smart contract code angle, it looks to be just another smart contract that I deploy onto the blockchain. Am wondering if Quorum can be used to ...
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1answer
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Tutorial of the Chainhammer for TPS measurements of Quorum blockchain

Can anyone help me to found a detailed tutorial on how to use the Chainhammer for TPS measurements for the 7nodes example of the Quorum blockchain I found this link https://gitlab.com/electronDLT/...
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2answers
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raft based consensus for private transaction

According to my understanding, in raft based consensus, leader is the minter who notifies all the follower to add new block in blockchain. In private transaction betweeen two nodes A and B of Quorum, ...
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Quorum: Extending list of participants that can access private transactions post transaction creation?

According to the Quorum roadmap (which is over a year old now) the team at JPM was planning to add a feature whereby additional parties could be given rights to view private transactions after those ...
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1answer
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use of privateFor while creating contract

I am having two contracts, custodian and trader. I am using custodian as a member of trader contract. contract trader { . . custodian public custodianUser; . . } I am deploying custodian on separate ...
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2answers
81 views

Interoperability between Ethereum's Public Blockchain and Quorum's Private Permissioned Blokchain Network

Scenario: I am trying to set two blockchain networks on a platform: Ethereum's Public Blockchain Network: For payment system in the form of ERC20 Tokens and Cryptocurrencies. Quorum's Private ...
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1answer
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Ethereum Code Fork on Github : How to incorporate the majority of Ethereum updates quickly and seamlessly

There are currently 6831 fork on go ethereum on github. Say I have made multiple code changes to go ethereum client for private ethereum purposes, How can I incorporate the majority of Ethereum ...
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Private Go Ethereum client (geth) in Red Hat Linux for all nodes consistently High CPU usage > 38.5% to 70% with no transactions

I run multiple quorum nodes i.e. Go Ethereum client (geth) in Red Hat Linux. all nodes consistently report High CPU usage > 38.5% to 70% for geth process despite no transactions are submitted to Geth. ...
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Quorum and Trusted Execution Environment (TEE)

For private ethereum and quourm, the use of trusted execution environment (TEE) might improve scalability and speed. Are there any projects that one could join for the use of TEEs with private ...
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1answer
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Enabling HTTPS / 2 Way SSL Communication between Ethereum / Quorum Nodes

To further enhance security and comply to regulatory requirements, there is a need to enable HTTPS / 2 Way SSL Communication between Ethereum / Quorum Nodes. Understand that Quorum uses existing ...
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1answer
26 views

How to allow cross origin in quorum?

i set up a quorum network following this tuotorial: Quorum Problem is after ran this command geth attach ipc:qdata/dd1/geth.ipc when i tried to run my dapp on top of this network.It was showing me ...
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Quorum/Ethereum chaindata (leveldb) encryption at rest and in transit

There is a requirement for the Quorum node data (chaindata, the leveldb) to be encrypted at rest and in transit (2 way SSL). Are there any 3rd party plugin/tools available? Are there anyone here with ...
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2 way SSL for devp2p / intercommunication between ethereum / quorum nodes

Is there some way to enable 2 way SSL for devp2p/inter-communication between ethereum/quorum nodes?
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1answer
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Quorum - oversized data during contract creation - contract code size limit

While creating contract, I am getting the error "oversized data" during contract creation. Other than modifying the go-ethereum code file to increase the maxCodeSize, or splitting the contracts up, ...
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Quorum Constellation as a Public Key Infrastructure (PKI)?

Read that Quorum "Synchronizes a directory of public keys mapped to recipient hosts with other nodes on the network." Does that mean Quorum Constellation could be extended further to be used as a ...
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1answer
29 views

Quorum Constellation TLS Trust Mode revoking a certificate

I have multiple quorum nodes setup. How does revoke a certificate for a node? Assuming the node has gone rogue, there is a need to revoke a certificate for the node
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1answer
37 views

In a permissioned blockchain network can a participant from one network transact with a participant in another network?

In my setup, each organization (organization A and organization B) has own quorum network. Participant of organization A wants to transact with a participant in organization B. Can it be achieved? I ...
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1answer
71 views

Quroum - High gas consumption for ether transfer

I am running a local 3-node Quorum cluster with Raft consensus. The network is setup using quorum-maker. All the settings are default except that I have added a custom account in the script so that it ...
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1answer
44 views

Securing Quorum Geth Node

I have a dapp node which uses web3js to send transactions to quorum geth node. The html pages shows the http provider and the ports. In theory anyone can use these ip and public address in the html to ...
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2answers
147 views

Better open source blockchain explorer for Quorum blockchain

I was looking for open source blockchain explorers for Quorum blockchain other than https://github.com/blk-io/blk-explorer-free, Thanks
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30 views

Securing private keys on geth node using hardware security modules? (HSM)

How does one secure the private keys on geth nodes? Are there ways to secure private keys on geth node using hardware security modules? (HSM)
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1answer
30 views

R3 Corda Integration/interoperability with Quorum — other than JSON RPC

Am looking to integrate/interoperate Quorum with R3 Corda in a way that achieves atomicity e.g. 2 phase commit. Understand that interledger focuses on interoperability and that could be a possibility....
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19 views

Quorum PrivateFor unable to work with structs of structs (nested structs) / arrays within structs in solidity

I am able to use privateFor in quorum to set and get multiple values. However, when I deployed a complex contract consisting of struct of structs, array of arrays, privateFor doesn't work -- unable to ...
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1answer
75 views

Private Transactions (Privacy) in Quorum

Why is PrivateFor required during contract creation? Would passing privatefor during function calls suffice? Inconsistent state observed. A contract was created by node 1 intended for node 2 and node ...
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1answer
40 views

Quorum privateFor visibility

Our current project requires that the recipients of a private transaction are unknown to the rest of the network. So my question is: is the privateFor field dropped before sending the transaction to ...
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1answer
38 views

Multichain vs Quorum

Other than multichain is utxo based and quorum is account based, what are some major differences between multichain and quorum? Scalability, consensus, turing complete language support, etc.
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Quorum Swarm: Can't find swarm account: no key for given address or file [duplicate]

While using Swarm in Quorum, I am getting the following error: Can't find swarm account: no key for given address or file Any similar encounters?
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1answer
61 views

Quorum and Swarm Integration

After building from Quorum source, I can see Swarm as on the binaries. How can one get Swarm to work alongside Quorum?
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Quorum Constellation equivalent to Whisper? [duplicate]

Is Constellation in Quorum somewhat equivalent to Whisper?