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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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tm.ipc: no such file or directory (socket file to use for the private API / IPC)

I am following this tutorial to setup a Quorum cluster: https://medium.com/@shizekun/how-to-set-up-a-quorum-private-chain-with-raft-consensus-and-dynamic-membership-bf826f3927e5 But unfortunately I ...
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10 views

web3j-quorum error “The constructor ClientTransactionManager(Quorum, String, List<String>) is undefined”

I'm trying to deploy a smart contract (7 nodes sample from Quorum) using web3j quorum.but it is giving me following errors error 1 : The constructor ClientTransactionManager(Quorum, String, List) ...
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1answer
9 views

Not able to connect to Quorum node from Nethereum

I am not able to connect to Quorumchain using Nethereum. Below is my code and error response. I have verified and the port is open in the machine. I am running on a Linux machine, Ubuntu 18.04. I ...
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0answers
14 views

Transaction not mined error when deploying to quorum maker server

I get the following error when attempting to deploy my zeppelin erc20 token to a quorum server(used quorum maker). (master) $ node migrations/2_proj.js ``````` transactionHash ...
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20 views

steps to use web3js-quorum or web3j-quorum for DApp creation?

I'm trying to use web3 to interact with a Quorum Blockchain. Calls seem to work properly but I can't manage to execute a transaction from my dapp using web3 and metamask. I can execute a transaction ...
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0answers
32 views

Quorum :- metamask do not support privateFor feature of quorum

i got to know that metamask do not support privateFor because of which private transaction for quorum dapp was not behaving as expected. so, I can't use metamask for my quorum DApp to switch port and ...
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1answer
30 views

Relation between the number of block and transaction rate in Quorum

I want to know the relation between the number of blocks generated and the transaction send rate in quorum. I did some experiments on quorum with RAFT consensus, and I get (I invoked the same ...
2
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2answers
52 views

How can I trigger a quorum private smart contract deployment from my js client app?

My question follows directly this answer to a similar question. I need for my client app users to be able to trigger private contract deployment. I've tried using privateFor with both the web3 and ...
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2answers
44 views

Returning error message from smart contract

I am trying to return error messages from solidity. I have this contract: pragma solidity ^0.4.23; contract Simple { function arithmetics(uint a, uint b){ require(...
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31 views

Adding Application Security for Cakeshop (Quorum) on Azure?

Is there a way to set a password to the cakeshop UI when using Azure for Quorum deployment? Cause else everybody can just go to the public IP or DNS name and stop, restart nodes or deploy contracts or ...
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1answer
43 views

How to connect Quorum with Metamask?

I'm trying to deploy smart contract on Private blockchain(quorum). And run the dapp on private blockchain. But I'm unable to connect the metamask with quorum network. The quorum is currently running ...
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1answer
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How to SSH Quorum running on Azure VMs?

I have deployed a Quorum Network on Azure and now I would like to have ssh access. In the creation process I had to set a VM-user and a VM-password. But if I use them like this: ssh VM-user@Public-IP-...
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1answer
41 views

How privacy can be ensured in smart-contracts?

When a smart-contract is created following an agreement between two entities, how the state of that contract (data) can be kept secret to only the two contractors? I heard about Quorum, but how ...
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1answer
66 views

How to create DApp for Quorum or any blockchain without using web3 and metamask?

I want to create a Dapp for quorum blockchain, the transaction signing via a wallet either in Metamask or pure web3 wallet is an issue and does not work with provateFor transactions in Quorum. So i ...
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62 views

“Uncaught Error: invalid address” AND “Internal JSON-RPC error” while working with MetaMask and quorum-maker

So I get this error: Uncaught Error: invalid address at c (inpage.js:1) at inputTransactionFormatter (inpage.js:1) at inpage.js:1 at Array.map (<anonymous>) at i....
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0answers
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Questions with Building a dapp using Quorum [closed]

I am working on a project to build a dapp for a trust system using Quorum, which needs a permissioned blockchain for data privacy. Only the admin, beneficiary, caregivers, case manager and authorized ...
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1answer
58 views

Send signed transaction from nodejs to private SmartContract using webjs in Quorum network not working

Context I have a quorum network mounted following the example of 7nodes. In node 1 I have deployed a smart contract privately, putting the public key of this ("BULeR8JyUWhiuuCMU/HLA0Q5pzkYT+...
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1answer
39 views

Quorum private transaction is being reverted by EVM

I had setup an quorum network using quorum maker (3 nodes). I tried to perform a public transaction and it worked. But when I tried to perform a private transaction it gets reverted by the EVM node:...
0
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1answer
68 views

Unable to interact with DApp deployed on quorum

I am unable to interact with contract using Dapp deployed on Quorum blockchain (using metamask). I am following "https://truffleframework.com/tutorials/building-dapps-for-quorum-private-enterprise-...
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1answer
61 views

Is there a way to prevent any client connected using web3.js to Quorum from deploying a contract?

I am planning on using Quorum for a permissioned setup,Is it possible to prevent anyone having a web client and connected to any quorum node deployed in the network from deploying a contract?
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43 views

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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0answers
27 views

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
39 views

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
42 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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2answers
91 views

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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0answers
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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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2answers
69 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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20 views

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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1answer
96 views

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
56 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
73 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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32 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
32 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
61 views

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
30 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
29 views

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
24 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
146 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
176 views

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 ...
2
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1answer
76 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
91 views

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
95 views

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
135 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
19 views

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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+50

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 ...