Questions tagged [quorum]

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

83 questions with no upvoted or accepted answers
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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 ...
7
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1answer
809 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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117 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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75 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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249 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 ...
2
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2answers
558 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 ...
2
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0answers
46 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?
2
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1answer
52 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 ...
2
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1answer
146 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 ...
2
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0answers
65 views

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. ...
2
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2answers
326 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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0answers
179 views

Quorum Geth Folder (chaindata, lightchaindata, nodes, LOCK, transactions.rlp), Quorum Raft State (ldb, log, CURRENT, LOCK, LOG, MANIFEST)

There are many folders and files generated when I created my Quorum nodes. Quorum geth folder: chaindata lightchaindata nodes LOCK nodekey transactions.rlp Quorum Raft State: 000002.ldb 000003....
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182 views

Integration between Multiple Enterprise Blockchains (Hyperledger, Quorum, Corda) — Through the use of Ethereum oracles?

Many organisations are running proof of concepts with different enterprise blockchain technologies -- Quorum, Corda and Hyperledger. Understand that most efficiency gains can be unlocked only when ...
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0answers
103 views

BI Dashboard (Tableau, Qlikview esque) for Ethereum/Quorum?

Most of the ethereum transaction explorers (etherscan) I have encountered does not have snazzy analytics capabilities. For enterprise, there is a need to analyse (sum, count, etc) the data in the ...
2
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58 views

Get Contracts Deployed Count on Quorum Blockchain?

I have lost count of the number of smart contracts deployed on my quorum blockchain. What are some negative impact/implications of forsaken smart contracts on a private blockchain such as Quorum? ...
2
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0answers
145 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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0answers
150 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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0answers
46 views

Quorum Smart Contract Performance Azure Blockchain Serivce

I wonder that how I can improve smart contract performance in Quorum. Right now I have a smart contract which save supply chain information and we are using Azure Blockchain Service for Quorum. We ...
1
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1answer
37 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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0answers
115 views

web3.eth.sendSignedTransaction from address is different from Signer's address

I'm signing transactions using an HSM and when using Web3js to send the signed transaction, the from property on the receipt shows an address that's: Different every time a sent signed transactions ...
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0answers
32 views

Can I run a javascript file using geth attach?

I want to automatize one thing. Aftert installing the Quorum nodes, I have to run: docker exec -it quorum_node1_1 geth attach /qdata/dd/geth.ipc Then I am pasting the JS code But I want to ...
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2answers
144 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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62 views

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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48 views

`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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127 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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62 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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86 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 ...
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1answer
150 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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1answer
222 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
473 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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0answers
480 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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0answers
314 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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1answer
657 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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0answers
212 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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218 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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2answers
514 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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2answers
882 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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0answers
210 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
99 views

Setting balance to an account

After i created a wallet for a user i want to modify his balance, how could i do that without setting the account address' balance in the genesis, I'm using quorum blockchain with web3j. Thank you!
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1answer
610 views

problem when deploy smart contract in Quorum using web3j

I'm using web3J when i try to deploy contract i get Error processing transaction request: Non-200 status code: &{Status:400 Bad Request StatusCode:400 Proto:HTTP/1.1 ProtoMajor:1 ProtoMinor:1 ...
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2answers
21 views

Unable to deploy contract on Private Quorum Network

We just built a new 3 node quorum network but we are unable to deploy any contract on it. Please find the below info: Quorum vesrsion: Geth Version: 1.8.18-stable Git Commit: ...
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20 views

Security implications on limiting the round change timeout of Istanbul BFT consensus algorithm?

I have a security-related question regarding the exponentially increasing timeout in the round change, which is used in the Istanbul Byzantine fault-tolerance consensus algorithm used by Quorum. ...
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1answer
22 views

Fire transaction from contract

I have a contract holding a mapping like this: mapping (address => User) users. How can I get the contract to automatically fire a transaction/event when a certain condition is met? For example, ...
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0answers
23 views

In 4 node Quorum setup, nodes 1-2 start but 3-4 give this error

I am running custom setup 4 node Quorum raft cluster, nodes 1 and 2 startup but 3 and 4 fail. what is the problem here? my startup script: ARGS="--nodiscover --verbosity 5 --networkid 1337 --raft --...
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1answer
50 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 ...
0
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1answer
91 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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0answers
63 views

Not able to connect Tessera with Quorum node

I am following up with the Quorum set up as mentioned @ https://docs.goquorum.com/en/latest/Getting%20Started/Creating-A-Network-From-Scratch/#tessera I have created 3 Quorum nodes with RAFT ...
0
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1answer
16 views

Quorum-maker-node not starting

I have created a node in quorum-maker using my ip address but that node is not starting.If i create a node using local ip(127.0.0.1), node starts.why?
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0answers
72 views

Quorum - Actual blocknumber and eth.blockNumber mismatch

I have a 3-node quorum setup that has been running from Jan 2019. The nodes were working without a problem until Sept 18 2019 when the network started to throw errors on submitting transactions with ...
0
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1answer
61 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. ...