Ethereum

Questions tagged [quorum]

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

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Private transaction failing with Non-200 status code

I have a Quorum network running on Azure Blockchain service. Sending private messages to a particular public key is failing. It was working till last week. No code or configuration changes have been ...
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2answers
36 views

What is the difference between IBFT(Istanbul BFT) and PBFT?

I recently got to know about IBFT and Quorum and started studying on their consensus protocols. And what is the difference on IBFT and PBFT? Are they pretty much like the same and, when considering ...
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2answers
388 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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1answer
62 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
262 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
27 views

Attach to tessera node failing

Im installed quorum with tessera but when i need to attach to any node using command $ ./attach.sh 1 show error "Fatal: Unable to attach to remote geth: dial unix qdata/dd1/geth.ipc: connect: no ...
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1answer
98 views

Quorum Data Migration

In the forseeable future, there will be a need to migrate data on the Quorum blockchain to another system. Are there migration tools/ETL tools that can take data on blockchain nodes and process it ...
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1answer
79 views

Quorum 7nodes example unable to finish simplestorage migration using privateFor

I'm following this example: truffle quorum example I created a cluster using docker-compose and all the nodes are up and running but when I run the truffle migrate command the migration doesn't end ...
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1answer
90 views

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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1answer
120 views

Quorum Consensus - BAR (Byzantine Altruistic Rational) Fault Tolerance / BAR Fault Tolerance / BAR Model

I refer to http://www.cs.utexas.edu/~dahlin/projects/bft/ http://www.cs.cornell.edu/lorenzo/papers/sosp05.pdf http://www.cs.northwestern.edu/~fabianb/classes/cs-443-w07/BAR.pdf https://blog.ethereum....
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1answer
96 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
369 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
53 views

Front-running in Quorum IBFT

Are pending transactions processed sequentially in IBFT? In a networks based on PoW you would usually pay higher gas price in order to get your transaction mined first. Is there a way to manipulate ...
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3answers
135 views

Error in the truffle init command, quorum

i'm trying to truffle a project but each time it shows me this message, whereas, i'm sure i installed the truffle successfully. vagrant@ubuntu-xenial:~/quorum-examples$ cd project vagrant@ubuntu-...
2
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2answers
381 views

Updating Smart Contract in Quorum with no change to the smart contract address

Understand that a smart contract address is deterministically computed from the address of its creator and how many transactions the creator has sent and thus every new smart contract deployment will ...
2
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1answer
155 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
750 views

read error unexpected EOF

I'm working a evidence application with quorum.I want to store the entire contents of a file on my private blockchain. Although it's not recommended. At first I use a linux command 'split' cut a big ...
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1answer
86 views

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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2answers
631 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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1answer
248 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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0answers
30 views

Using privateFor in truffle test

Using truffle , I am able to deploy private smart contracts using privateFor clause. However, I am not able to use in truffle test. I get the following error. Is there a way we can use privateFor ? ...
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1answer
272 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
96 views

Remix Browser and Quorum Local Node

When i try to deploy any contract using quorum local node in remix browser with solidity version higher than 0.5.0, the contract gets deployed but any transaction to interact (fetch / update) the ...
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1answer
256 views

How does Quorum or any private ethereum deal with failing/unavailable nodes, Single Point of Failure (SPOF) and Settlement/Transaction finality?

How does Quorum or private ethereum deal with failing/unavailable nodes, Single Point of Failure (SPOF) and Settlement/Transaction finality? It seems to me that only ethereum main net is truly ...
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0answers
36 views

Quorum problem to find external node

I have tried several configurations without success. I am trying to connect two nodes there are in different network. Both are in a VM at google cloud, as you can see in the image below, one of them ...
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1answer
276 views

solidity sorting array - LIFO / FIFO

I am adding to an bytes32[] array via push(). When I traverse the array with for (uint i = 0; i < array.length; i++), This is First in First Out (FIFO) sequence right? How can one perform a ...
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1answer
182 views

Why does the transaction stay in queue from more than 240 second

I am running quorum nodes via the Quorum-maker script, and when trying to call functions from my already deployed smart contract, I get this error : Transaction ...
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2answers
556 views

Gas Price Must Be Greater Than Or Equal To 0.1 GWEI in Metamask

I have setup a private quorum network, connected the metamask with my quorum network and it is connecting but when am trying to do transaction getting an alert Gas Price Must Be Greater Than Or Equal ...
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1answer
278 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
112 views

Setting methods permissions a quorum network

I have 3 solidity smart contracts that run in a quorum network with 7 nodes. At the moment i use the constructor to set the owner of the smart contract, that is the node that deployed it. ...
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1answer
161 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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2answers
105 views

Web3js events “fromBlock: 0” doesnt work

I want to get events from block X. I have: quorum-v2.4.0 web3js 1.2.6 And I have my own smart contracts I want to listen for. So I have created listener for allEvents like this: const event = ...
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1answer
352 views

Quorum cakeshop - Error while starting up

I hava a question regarding Quorum cakeshop. Currently I am trying to get the cakeshop running, what i want to use to play a around with Quorum a little. More infos below: https://github.com/...
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2answers
1k views

Quorum: Can't Connect To Nodes From External Sources

I have a Quorum (7nodes example) network up and successfully running. I can connect to any geth node using the following: geth attach ipc:qdata/dd1/geth.ipc I can also see that the ports opened in ...
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1answer
488 views

Set up Custom nodes in Quorum

I have gone through the https://github.com/jpmorganchase/quorum-examples and it works good and fine. Now I want to make my own custom node Quorum Network what is the best method, tool or any guide ...
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23 views

How to schedule a transaction to a Contract? [duplicate]

I have a simple getter-setter contract. I want to schedule transactions for a method of my contract on a particular date and time. Do we have a function to schedule transactions to a contract in ...
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1answer
20 views

Are the events raised in a private transaction in quorum also private?

I'm trying to understand the specifics of privacy in quorum transactions, specially regarding the events. Are the events raised in a private transaction in quorum also private? I can't find any ...
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1answer
494 views

I downloaded and built quorum from the official git repo but I dont see the QOURUM OPTIONS

git clone -b geth1.6 --single-branch https://github.com/jpmorganchase/quorum.git NAME: geth - the go-ethereum command line interface Copyright 2013-2017 The go-ethereum Authors USAGE: geth [...
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1answer
35 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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1answer
82 views

Quorum Maker for recovery of blockchain data in secondary node

We are trying to setup multiple nodes in QUorum maker to make one node as a backup to be used in case the primary node fails for some reason. We are able to deploy our smart contract successfully but ...
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0answers
31 views

Uport for Quorum-based Dapp

I'm developing a donation platform based on the blockchain. I need to identify the beneficiary that can be an institution, an association, a hospital, a retirement home, a person, etc. I study the ...
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1answer
137 views

Multiple nodes setup in Quorum Network

Is there any documentation to state how can we have redundant nodes configured in Quorum network so that even if a single node goes down, the data in blockchain is still retrievable by the app? ...
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2answers
172 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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1answer
583 views

Quorum Account existence on node requirement of Private Transaction

I am trying out private transaction using Quorum. Two quorum nodes N1 and N2 configured to participate in the private transaction. I deployed a contract which is private for N1 and N2. I issue ...
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1answer
717 views

Node unable to connect to the constellation node (quorum)

Looking at the 7Node example from: https://github.com/jpmorganchase/quorum-examples/tree/master/examples/7nodes and trying to configure my network but have ran into a lot of trouble over the days, ...
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1answer
850 views

Deploy contract in web3j quorum problem

I'm trying to deploy a smart contract (7 nodes sample from Quorum) using web3j. It fails at get() to get the contract wrapper object. If I check the logs, a new transaction will show up, but if I call ...
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1answer
402 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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0answers
38 views

Chainlink services are not supporting the privateFor transactions in Quorum/Kaleido

We are exploring Kaleido and Chainlink for one of our use cases. What we have done: We have created a network of Quorum/Raft nodes. We had setup the chainlink service for the network. We have setup ...
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0answers
35 views

Pending transactions at the client machine, but minter is not minting a new block since there are no pending transactions

I am running Blockbench on Quorom Raft using smallbank workload: 4 minters and 4 clients. Following the logs, I found that sometimes 1 specific client (Client 4) has pending transactions but the ...

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