Questions tagged [quorum]

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

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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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40 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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38 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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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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39 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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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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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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85 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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74 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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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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181 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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99 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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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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465 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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277 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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505 views

Quorum & web3j: Transaction has failed with status: 0x0. Gas used: 0. (not-enough gas?)

I'm doing some play & test with Quorum. I'm using example 7nodes with docker. The network is up and my simple smart contract is deployed with a set and a get function. When I call the set function ...
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1answer
107 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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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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80 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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120 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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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
142 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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32 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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74 views

In Quorum, Does contract resides on all the nodes or a majority subset of the nodes?

"A contract in the sense of Solidity is a collection of code (its functions) and data (its state) that resides at a specific address on the Ethereum blockchain." - Solidity Documentation In Quorum, ...
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125 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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104 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 ...
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276 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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381 views

Are there different clients for Quorum compared to Ethereum?

Is it correct to say the following? Ethereum clients run Ethereum nodes. Geth and Parity are examples of Ethereum clients. Quorum clients run Quorum nodes. Is there an equivalent to Geth and ...
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96 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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299 views

quorum istanbul byzantine fault tolerance (ibft) consensus nodes count for failover - recommended configuration

In Quorum, specifically for istanbul byzantine fault tolerance (ibft) consensus algorithm, what is the ideal node count for failover? i.e., recommended configuration? Nathan Aw (Singapore)
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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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540 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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65 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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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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189 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 ...
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72 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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52 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 ...
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89 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 ...
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238 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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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....
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52 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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250 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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65 views

Algorithm used for symmetric key encryption by quorum

What are the symmetric key encryption techniques used by the enclave in quorum to encrypt the payload? The documentation of quorum mentions that the enclave uses a symmetric key to encrypt the payload ...
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75 views

I can't execute transaction from Dapp: Nounce too low

I'am trying to use go-ethereum on my local network: I have configured a 5-node quorum network on my local machine and I'am building Dapp. I created smart contract and generated go bindings. When I ...
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1answer
224 views

Mining a private transaction in quorum

I was going through the quorum docs and got stuck on how private transactions are mined? When two nodes, say Node A and Node B do a private transaction between themselves. Which node then mines the ...
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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
218 views

Private transaction validation in quorum

I was going through the quorum documentation and stumbled upon how private transactions are validated in quorum. Take the following example where there are four nodes - Node A, Node B, Node C and Node ...
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55 views

In a precise sense, Is Quorum considered more of a blockchain or a Distributed Ledger?

In a precise manner, Is Quorum considered more of a blockchain or a Distributed Ledger?
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3k views

Incorrect Usage. flag provided but not defined: -emitcheckpoints

I'am trying to build this : PRIVATE_CONFIG=ignore nohup geth --datadir ./Node1/new- node-1 --nodiscover --verbosity 5 --networkid 31337 -- rpccorsdomain="*" --ws --wsorigins="*" --...