Questions tagged [quorum]
Q&A related to Quorum, the permissioned Go implementation of Ethereum supporting data privacy.
194 questions
0
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1answer
11 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 ...
0
votes
0answers
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) ...
0
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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 ...
2
votes
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 ...
0
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0answers
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 ...
2
votes
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 ...
0
votes
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
votes
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 ...
0
votes
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(...
0
votes
0answers
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 ...
1
vote
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 ...
0
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1answer
17 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-...
2
votes
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 ...
0
votes
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 ...
0
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0answers
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....
1
vote
0answers
36 views
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 ...
0
votes
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+...
0
votes
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
votes
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-...
1
vote
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?
1
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0answers
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 ...
1
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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 ...
1
vote
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,...
2
votes
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 ...
0
votes
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(...
1
vote
0answers
30 views
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 ...
0
votes
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 ...
0
votes
0answers
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 ...
0
votes
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/...
2
votes
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 ...
1
vote
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 ...
2
votes
0answers
19 views
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?
1
vote
0answers
28 views
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 ...
0
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0answers
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 ...
0
votes
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 ...
0
votes
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:
...
2
votes
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://...
1
vote
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 ...
0
votes
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 ...
1
vote
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 ...
3
votes
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
votes
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 ...
1
vote
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/...
2
votes
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, ...
5
votes
0answers
96 views
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 ...
1
vote
1answer
94 views
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 ...
3
votes
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 ...
0
votes
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 ...
2
votes
0answers
46 views
+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.
...
0
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0answers
22 views
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 ...
