Questions tagged [quorum]

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

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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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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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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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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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0answers
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
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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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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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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1answer
38 views

What is the block number of the first block mined in a private blockchain network deployed on say Quorum?

I am working on POCs on Azure Blockchain Service. While working on quickstarts, I observed that while deploying my 'Hello Blockchain!' smart contract, the block number of the block mined was 34136. ...
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1answer
46 views

How to execute a private transaction in quorum

I am currently learning quorum. I was able to build two node environment by referring to "Creating a network from scratch" in the following quorum official link, and successed to attach node1 using ...
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1answer
74 views

Can an Erc-20 token that I create on my Quorum be integrated with any cryptocurrency exchange (for example Coinbase)?

I have setup my own quorum blockchain network. If I deploy an ERC20 token contract with a coin name (say ABC), will I be able to list the coin in exchanges ?
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1answer
36 views

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
106 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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2answers
60 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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1answer
24 views

What is the max number of Blocks which can be created in Quorum

I have nodes running from past few days, with almost 4100+ transactions successfully completed. When i try to interact with the contracts again to add/modify details it shows error Error when ...
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2answers
170 views

Quorum private transactions not private

I am struggling to enforce privacy using Quorum's privateFor option. I have provisioned a consortium in Azure blockchian service with 3 nodes. I deploy a smart contract from node2 privateFor node1 ...
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1answer
81 views

How to send a private transaction using Quorum

I'm trying to send a private transaction using Quorum geth, but eventually got an error : Error: ether value is not supported for private transactions at web3.js:3143:20 at web3.js:6347:15 ...
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0answers
24 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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2answers
254 views

How is authorization handled in smart contracts

I have deployed a Quorum network on Azure Block chain service to be used by specific invited members of a consortium. I have not yet explored the privacy features provided by Quorum on top of Ethereum....
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1answer
34 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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1answer
98 views

Contract does not exist at address

I have setup a private Quorum network and successfully deployed contracts and executed contract functions using Visual Studio Code and remix. When i try to deploy the exact same contract manually ...
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0answers
38 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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0answers
74 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 ...
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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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0answers
30 views

Solidity Contract Length [duplicate]

What is the max length of solidity contract? I have been trying to deploy a contract of 328 lines of code on Remix Browser with a locally created Quorum Private Permissioned Node. I get the ...
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1answer
109 views

gas required exceeds allowance or always failing transaction in local permissioned Node

I am facing the some issue with gas but i do not have any modifiers in my contract. Even a simple setter-getter contract shows the following Error Error: gas required exceeds allowance or always ...
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1answer
84 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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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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0answers
116 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 ...
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1answer
130 views

Defined GasLimit in genesis file and in web3j gasprovider

Im having issues when I try to implement a back end that generate smart-contract transaction calls using web3j. But I'm a lit confused with the gas limit concept. I have defined inside the genesis ...
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1answer
31 views

Not possible to connect to the Web3 provider

I have a problem connecting my url to my quorum node. I already make sure the node has an account, I run it without problem but I have that error enter image description here enter image ...
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1answer
25 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
98 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 ...
2
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1answer
267 views

Differences between Quorum and Pantheon

I want to build an app on a private blockchain and I'm hesitating between 2 clients : Quorum and Pantheon (now Hyperledger Besu) Does anyone know what are the main differences between the 2 and the ...
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2answers
89 views

Quorum Development [closed]

i am looking for in depth development reference for JPM Quorum blockchain, i am not able to find anything other than the basics. If anyone has any good resources please share them with me. to be more ...
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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
57 views

Smart contract copy

So I am in a permissioned blockchain setup, using Quorum as a client. I have deployed a private smart contract to members A and B, and now I have the need to redeploy it, giving access to member C. ...
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1answer
58 views

Quorum - Ethereum interaction [closed]

how to connect the quorum blockchain with the ethereum network using the bridge services.Can anyone clarify me about the bridge concept and how to implement it in quorum ethereum connection?
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1answer
173 views

Empty array is being returned

Am trying to add few hashes into an array and retrieve those but the getHash() is returning an empty array. My smart contract is : pragma solidity ^0.5.0; contract simpleexample{ bytes32 public ...
0
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1answer
50 views

Is a Raspberry Pi 2 a suitable piece of hardware to run a Quorum Node with Tessera? If so has it been done?

I would like to set up some Quorum nodes (5) for test purposes and thus far have been unsuccessful in getting a node to run on a Pi 2. The work has stopped due to the need to recompile the binaries ...
0
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1answer
67 views

getPastEvents cannot handle multiple requests?

When I send about 100-120 requests in async, it is fine, the event will give me a response. But above 150 or so, I get "Invalid JSON RPC response: "" Web3JS 1.2.1 Geth Info: Version: 1.8.12-stable ...
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1answer
87 views

Quorum Nodes not syncing

I have 5 nodes with quite different block numbers( one is stuck at 201504, another at 280432 and so on) , they don't seem to be syncing. No particular error in Quorum Logs as well. Any transaction ...
2
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1answer
224 views

Good source for TPS and transaction latency / finality for private Ethereum blockchains

I am looking for a good source / sources to compare TPS and transaction latency (How long it takes to send a transaction until it is mined) for different private blockchain solutions. Especially I am ...
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1answer
66 views

Token transfer from private network to public

I want to transfer my token from private network(quorum) to public network(ethereum), so I have burned the equal amount of tokens in quorum network and minted same amount of tokens in ethereum network....
1
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1answer
49 views

How to do the Smart Contract Storage Migration using Quorum?

I wrote one smart contract without upgradable logic, now I want to update the same smart contract with some changes. Is it possible to copy the data from old contract storage to a new one?
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1answer
236 views

About key and address difference between Quorum and Ethereum blockchain

Quorum is a fork of Ethereum, what are the main difference of them about private key/public key/address generation and representation format? In the link Quorum wiki, there is a public key like below: ...
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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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