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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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Is it possible to modify privateFor addreses in a private Smart Contract (Quorum)?

I know how a private smart contract works providing a list of accepted addreses to privateFor property, but what if I want to disable (or enable) any address visibility? Should I deploy a new Smart ...
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Quorum deploy with Web3j timeout

SCENARIO: I have the following code: final String hostUrl = this.deployerProperties.getProperty("quorum.host.url"); final String hostPort = this.deployerProperties.getProperty("quorum.host.port"); ...
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31 views

How to show partial information on private transaction?

I want to achieve the following requirement in quorum blockchain. 1) Participant A sells a red asset to Participant B for 100 dollars. 2) Participant B paints the asset blue. 3) ...
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quorum-maker-no web UI is exposing on any host ports after creating nodes

Im trying to deploy contract using quorum-maker, I've followed every step as mentioned in wiki, but still not able to connect web UI and have no idea where Web app is deployed(in wiki. http://10.50.0....
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22 views

Can Qorum Blockchain supports partail transaction encryption?

My use case is that we need to protect sensitive data in the transaction in blockchain. But we want to open other data in the same transaction to the public, Can Quorum support the above mentioned ...
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23 views

deploying simple contract on quorum 7nodes example

I am trying to deploy contract with privateFor tag in migration and for set function same as shown in truffle quorum 7node example. started nodes with these commands ./raft-init.sh ./raft-start.sh ...
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2answers
56 views

Invalid Sender when Using Quorum

I followed this tutorial (https://github.com/jpmorganchase/quorum/wiki/From-Scratch) to start up Quorum with 4 nodes using istanbul consensus. The nodes can connect and blocks are being generated but ...
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43 views

Quorum blockchain transactions visibility

I am wondering if the content (transaction) of the consortium blockchain or Quorum blockchain can be visible only for the validators. In other words, the registered users (who can access the nodes) ...
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62 views

How to set up Quorum Blockchain?

I have read a lot about Quorum blockchain. My goal is to run and test it. I have found many articles. Could anyone suggest me good start-up articles for setting-up the Quorum on a number of nodes and ...
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1answer
61 views

Deploying Contract with Quorum Web3j response: Non-200 status code

SCENARIO: I have the following code: final String hostUrl = this.deployerProperties.getProperty("quorum.host.url"); final String hostPort = this.deployerProperties.getProperty("quorum.host.port"); ...
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1answer
41 views

How are new users authenticated into Quorum network

I could find from online readings that Quorum has a Network Manager component that controls nodes access to network to created permissioned network of nodes. But, I couldn't see explanation on how ...
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39 views

Issue calling one contract from another using Quorum

I'm using truffle and running locally with 4 quorum nodes, trying to call another contract's function, but keep getting 0 in return instead of the expected value the I get once calling the contract ...
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Are private variant of Ethereum or any other blockchain just a glorified distributed database?

Are private variant of Ethereum or any other private blockchain solution just a glorified distributed database? Other than the fact that the data structure is cryptographically made immutable through ...
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Quorum Minimum Number of Nodes for Raft Consensus and Istanbul BFT

A Quorum Raft cluster of 3 nodes can tolerate a single node failure, while a Quorum cluster of 5 can tolerate 2 node failures. What is the equivalent if one uses Istanbul BFT? Nathan Aw
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Quorum Tessera Implementation in Go

as Quorum and Ethereum are developed in Go, would like to understand why Tessera, the new Quorum transaction manager to replace Constellation, is written in Java instead of Go? Thank you. Nathan Aw
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How to get decrypted transaction data in quorum?

On Quorum_Node1 I am sending a transaction with privateFor: parameter as follows: eth.sendTransaction({from: eth.accounts[0], to: "0xca84356...9a3d0ccf92b8e", data: web3.toHex('sample message for ...
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57 views

Getting Fatal: Error starting protocol stack: Genesis not found in chain

I am getting the following error in one of the nodes, I have a quorum network running. Fatal: Error starting protocol stack: Genesis not found in chain DEBUG[02-19|08:37:08] FS scan times ...
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Difference between Recursive Linear Prefix or Recursive Length Prefix? Vs Google Protocol Buffer (Protobuf)

Like to know what is the difference between Recursive Linear Prefix and Recursive Length Prefix? I have seen both around Are there they same? Or different? Also would like to know the reason why RLP ...
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1answer
68 views

Quorum Tessera Private/Public Keys vs Quorum (Ethereum) Keystore - Difference and Keys Management

Understand that Quorum Tessera is for encryption, decryption, and distribution of private transactions while Quorum Keystore is for normal transaction signing. Can both be collapsed into one set of ...
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What are the Minimum Requirements for a Quroum node?

I am planning to run a Quorum (Ethereum fork) blockchain on my business. I was wondering if quorum node will run on a Raspberry Pi 3 Model B+. Raspberri Specs: Broadcom BCM2837B0, Cortex-A53 (ARMv8)...
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56 views

Quorum node address

In the Node class of the Quorum Web3j. The String address what is? package org.web3j.quorum; import java.util.List; /** * Quorum node configuration class. */ public class Node { private final ...
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49 views

Public smart contract that calls Private contract API

In a private blockchain (e.g, quorum), assume that I have a peer X and peer Y. X has a private smart contract (A) and Y has a public smart contract B. Assume that A provides an API for Y in order to ...
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73 views

What are the differences between Monax/Hyperledger Burrow and Quorum?

Are there any significant differences between these protocols? Thank you for answering.
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Ethereum/Quorum Pluggable Consensus with Algorand Byzantine Agreement Protocol?

Can Quorum and Ethereum be possibly configured/modified to use Algorand Byzantine Agreement Protocol?
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165 views

Quorum & web3j: Transaction has failed with status: 0x0. Gas used: 0. (not-enough gas?)

I'm doing some play & test with Quorum. I'm using example 7nodes with docker. The network is up and my simple smart contract is deployed with a set and a get function. When I call the set function ...
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1answer
75 views

truffle-contract: Contract has not been deployed to detected network (network/artifact mismatch)

I am running a private network and would like to use truffle-contract to interact with the contracts. Unfortunately it gives me this error: Error: Contract has not been deployed to detected network (...
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185 views

truffle-contract error: Number can only safely store up to 53 bits

I am using truffle-contract with a local quorum node and try to execute a smart contract method, but getting this error: Error: Number can only safely store up to 53 bits That's the way I do it: ...
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35 views

How to read data from external files in Quorum Blockchain?

I have a use case where we have implemented Quorum Blockchain using AWS. The smart contract was written in Solidity. Initially we randomized the valued by coding in Smart Contract however we now want ...
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65 views

How can a peer request another peer to invoke a function from his private contract

I build a permissioned network using Quorum, I have a peerA which has a private smart contract, another peerB that cannot invoke functions of the smart contract as it is private So, can peerB send ...
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1answer
95 views

Quorum Raft: Is the leader validates each transactions in the block before broadcasting it?

I read about how the raft consensus works in Quorum to reach consensus and broadcast blocks (https://github.com/jpmorganchase/quorum/blob/master/docs/raft.md). I don't know if the following is correct ...
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`etherlime deploy` fails with Error: invalid sender

I am trying to deploy a contract with etherlime to a private permissioned Quorum network: etherlime init --> OK etherlime compile --> OK etherlime deploy --> Error Error: Compilation ...
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2answers
92 views

truffle migration fails, but initial migration was mined

I am trying to deploy this contract on a private permissioned Quorum network. The migration fails on the 1_initial_migration process. If I try to repeat the process with: sudo truffle migrate --...
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How to `truffle migrate` to private permissioned network?

I am running a private permissioned network and would like to use Truffle v5.0.1 for deployment. I use it according to the documentation: Compile my project with truffle compile so that the ./build ...
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1answer
54 views

Quorum: permissioned-nodes.js and static-nodes.js

How do I proper use permissioned-nodes.js? According to this information: https://github.com/jpmorganchase/quorum/wiki/Security If the --permissioned flag is set, the node looks for a file named &...
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142 views

Quorum transaction not mined and no address

I am running a private Quorum chain consisting of 3 nodes with raft consensus. When I deploy a contract to the chain via web3 I get returned a hash and can then look up the transaction with the local ...
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1answer
64 views

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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1answer
54 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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120 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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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
112 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
276 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
181 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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1answer
47 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? In order to prevent Ethereum accounts being generated or smart contracts being deployed via the publicly ...
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1answer
155 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
68 views

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
183 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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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
359 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
125 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:...
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1answer
147 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-...