Questions tagged [quorum]

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

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558 views

ECDSA Transaction Signature Values (V-R-S) — Interpreting and presenting it to layman users

In Quorum + Web3, I used getTransaction and it returned me the necessary details and also V-R-S. Understand that VRS is part of the ECDSA signature. There is a need to interpret and present these ...
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390 views

JSON RPC Load Testing / Stress Testing Tool

I am trying to test my quorum setup by load testing it. Are there any JSON RPC Load Testing / Stress Testing Tools? Does Postman or SOAP UI supports JSON/RPC calls?
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3answers
404 views

Mocking blockchain for unit test quorum

Is there a way so that I can mock blockchain for unit test in quorum. I do not want to set up a test blockchain for unit testing. Is there any possibility.
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164 views

Quorum failure - Failed to decode message from payload

We use in our project -JP Morgan Quorum (Ethereum based) bloackchain - with istanbul voting mode. We have 4 nodes (3 of them are validators - hard coded, nonchangable) And from time to time (...
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36 views

Can Quorum be run on RHEL?

Understand Quorum examples are running on Ubuntu -- Is Quorum able to run on top of RHEL OS?
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300 views

Trying to start a geth node for Quorum, running into this error. Help

Is this a raft problem? nohup: appending output to 'nohup.out' WARN [05-06|07:14:42] No etherbase set and no accounts found as default INFO [05-06|07:14:42] Starting peer-to-peer node ...
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1answer
725 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
512 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
422 views

Quorum — Is Raft more scalable in terms of TPS compared to Istanbul BFT (IBFT)?

This question is on Quorum, the enterprise flavour for Ethereum. Understand that BFT algorithms are always prepared for the worst possible circumstances and pays a price for this in terms of speed. ...
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1answer
236 views

Can a user communicate with a private ethereum network ( Quorum)?

I am up to build a electronic health record system using Quorum. My Project includes Appointments and prescriptions to handled too. I have to make a permissioned network to ensure data privacy. Can a ...
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1answer
372 views

How to interact with a smart contract which is deployed in a quorum network (Alastria)?

I have already deployed the contract using tuffle in my private network. Now, I would like to know what i have to do to interact with the contract. I don't need ethers in my wallet and actually i don'...
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5answers
402 views

Quorum - Unable to read state of one public contract from another

I'm running the 7nodes example of quorum from truffle and the example functionalities work as expected. However, when I create a public contract to access the state of another public contract, I'm ...
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1answer
415 views

Can't connect to quorum network

I am following the 7nodes example on truffle's website to setup and connect to a quorum network http://truffleframework.com/tutorials/building-dapps-for-quorum-private-enterprise-blockchains I was ...
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0answers
223 views

How to add Peers in Quorum Single Member Blockchain Network in Azure?

I'm using the QSMBN(Quorum Single Member Blockchain Network) provided by Azure, and I'm trying to connect one external node to the quorum network, but when I try to add peer displays this message "...
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0answers
228 views

Quorum + Web3js web3.isConnected() returning false

I am running on quorum and using web3.js. When I run web3.isConnected(), it is returning "false" var web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:22000")); alert(web3....
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0answers
156 views

Can not access quorum's contract from webpage *CORS*

I am getting following error on browser's console while accessing contracts. Failed to load http://localhost:22000/: Response to preflight request doesn't pass access control check: No 'Access-...
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1answer
307 views

Connect Quorum nodes to Ethereum

At Quorum network, we can submit public transactions within Quorum nodes. Are we able to connect Quorum nodes to Ethereum and allow those public transactions go to public?
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1answer
258 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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3answers
136 views

Other than Quorum, what are some other Enterprise Ethereum-based platform available?

Other than Quorum, what are some other Enterprise Ethereum-based platform available out there?
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1answer
283 views

Quorum “ now ” returns bad number

I am using the prebuilt function now in my contract and returning it as an uint. but when i read it using web3 1.0 i get bigger numbers than usual : Example : This what the number should look like ...
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1answer
541 views

VM returned with error err=“gas uint64 overflow”

I am running a private quorum network, and I am trying to call a contract function using web3; my contract was deployed correctly, and i am able to see it and interact with it. Next is the code i am ...
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1answer
184 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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1answer
551 views

Does quorum support privacy between accounts when multiple accounts use same quorum-node?

From what I understand by this wiki on Transaction processing, quorum-nodes which are privy to a private Tx, will update their private stateDbs. My question is, can two different accounts access ...
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2answers
709 views

Truffle migrate stuck at first migration

i am running a private Quorum node, which is basically normal ethereum node, via geth. Then i tried to do deploy contract using migrate from truffle. but it got stuck here : Running migration: ...
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1answer
431 views

Why is quroum 7 nodes example creating genesis block for every node

I tried the Quorum 7 nodes example and it worked flawlesly. but what i found out is that running the ./raft-init.sh a genesis block is being written for every node. Code : [*] Configuring node 1 (...
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1answer
1k views

Quorum, where to start?

I am relatively new to Ethereum, and i want to know exactly how to migrate to quorum. And by that i mean migrate exisiting contracts. I also want to know about the how to start with quorum and if ...
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1answer
163 views

How many types of accounts are available in quorum

In Ethereum two types of accounts are there.EOA and contract account.Does quorum run in samy way that means it is similar like ethereum.
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1answer
597 views

Does private Ethereum blockchain like Quorum need ether?

Does private blockchain built on Ethereum like Quorum need/require ether? How will the emergence of such private blockchains impact ether's value.
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1answer
467 views

Does Quorum works with Windows?

As the tittle says, I would like to make a demo but I don´t know if Quorum supports windows.
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1answer
463 views

What contract is used in Istanbul consensus mechanism in JP Morgan Quorum?

In "7nodes" installation example from JPMorgan Quorum github is used such a genesis file ("istanbul-genesus.json"): { "alloc": { "0x0000000000000000000000000000000000000020": { "code": "...
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1answer
506 views

Quorum: “read error invalid character 'P' looking for beginning of value” on private transaction

Quorum over Ubuntu 16.04, Geth 1.7.2-stable. Quorum is installed and it passes the tests. 3 nodes (all roles enabled) with their corresponding constellations. Tested both over 3 local docker ...
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1answer
338 views

Find out enode url

I am running seven Quorum nodes, which I have set up the way this example describes it: http://truffleframework.com/tutorials/building-dapps-for-quorum-private-enterprise-blockchains Afterwards I ...
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1answer
965 views

How could I send transactions continuously by Web3j generated wrapper

I wrote a smart contract and deployed on my private Quorum. I use Web3j to generate java wrapper to call ABIs. For example, // here is a smart contract function function getMoney() external payable ...
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1answer
381 views

How to unit test Quorum projects?

I'd like to build unit tests for a Quorum project including the Quorum specific part that is the privateFor attribute in the transactions. Is there a tool like testrpc specific to Quorum ?
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2answers
2k views

compare dates in solidity

I need to compare dates in solidity, so as to complete a business rule. There is no date type in solidity which ca be used to store date and perform calculations on it. So help in this regard will be ...
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2answers
1k views

Store JSON String in Solidity

I have trying to store a JSON string in my solidity code string variable, it only stores the string on the constructor, but if try and store the same data in the function call it never saves it. ...
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2answers
567 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
878 views

Issue in truffle migration with Quorum

I am following this tutorial http://truffleframework.com/tutorials/building-dapps-for-quorum-private-enterprise-blockchains for Quorum installation.. I have successfully installed vargrant(Installed ...
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1answer
776 views

Why do we need ether in private quorum chain for transactions?

I have created a private quorum chain network. If there is a balance in the account address only then transactions are happening. Why do we need ether balance in quorum private chain or is there ...
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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
412 views

Error Installing web3js for Ethereum / Unable to connect to github.com

I'm using npm to install web3js: npm install web3 It eventually fails. Here is the output I get... npm WARN deprecated tar.gz@1.0.7: â ï¸ WARNING â ï¸ tar.gz module has been deprecated and your ...
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1answer
1k views

Quorum: Generating Public Key for a Given Address

I stood up the 7nodes example. There is a public key: ROAZBWtSacxXQrOe3FGAqJDyJjFePR5ce4TSIzmJ0Bc= provided for the privateFor field in order to change a contract value while keeping it private. ...
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1answer
70 views

solidity string variable compresion

I am try to compare a string variable in solidity code, mainly i have to check if the string is empty or not. How can it be achieved and also how much long/large of a string i can save in a string ...
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1answer
497 views

Account management in Ethereum or Quorum

We have two types of account in Ethereum one is EOA and other is a Contract account. While going through some code i found that u need to have a EOA account to create a new contract in ethereum. var ...
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0answers
223 views

Does Quorum provide support for Windows?

I am new to Quorum.I want to build Quorum with windows. But Windows isn't currently supported directly as stated in https://github.com/jpmorganchase/quorum/issues/178 Is there any alternate solution ...
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0answers
79 views

How to do a disaster recovery in private chains?

How can I do a disaster recovery on a private chain running ethereum, say for instance Quorum ?
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1answer
586 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
208 views

get back to Ropsten: reclaim address after deletion of genesis block & /testnet/geth/chaindata

Recently I've been playing around with JPM's Quorum. It's similar to go-ethereum (goethe) in many ways, but one of the key differentiating factors is that it has a genesis block which isn't the same ...
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2answers
388 views

specify and run *particular* version of geth (goethe) on my machine, with more than one source

At the moment I'm playing around with- or rather "conducting some experiments"- with JPM's quorum. On my machine I have multiple versions of geth (i.e. goethe) installed. I'm fairly confident that ...
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1answer
355 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/...