Questions tagged [quorum]

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

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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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51 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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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
36 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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20 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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9 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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62 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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1answer
117 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
42 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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45 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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43 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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40 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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97 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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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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41 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
52 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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1answer
53 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
37 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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32 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
127 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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311 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
34 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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1answer
41 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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105 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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88 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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1answer
786 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="*" --...
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Contract cannot create new Contract in Quorum

My main contract called SurveyFactory creates new Survey forms: pragma solidity = 0.5.9; import './Survey.sol'; contract SurveyFactory { address[] public surveyList; address public Owner; ...
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1answer
140 views

The EVM throws an error “invalid opcode 0x1c” [duplicate]

I have written a simple smart contract that allows to store a string, and I'am trying to use go-ethereum(which is similar to web3j). When I execute a transaction, I have this error VM returned ...
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1answer
78 views

How to get rid of inactive nodes in Geth

I am setting up a quorum network with Quorum-maker, which uses Geth. It is running at the moment, with three alive nodes. However, earlier I had attempted to create two other nodes, which failed. I ...
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49 views

Metamask transactions keep stack at the txpool of a Quorum Private Network

System information Geth version: 1.7.2-stable-0905eda4 OS & Version: Ubuntu 16.04 Branch, Commit Hash or Release: HEAD detached at v2.2.1 Actual behaviour and Steps to reproduce the behaviour ...
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103 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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54 views

How many nodes do I need in a Quorum Private Blockchain?

I want to deploy a private blockchain using Quorum on Azure, create some ERC721 Tokens and send them various accounts inside the Private Blockchain. How many nodes do I need for a Private Blockchain ...
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59 views

which port I use when I want to connect remix to my local quorum network?

I want to deploy a smart contract on my local network. I executed a local node via PRIVATE_CONFIG=ignore nohup geth --datadir ./Node1/new- node-1 --nodiscover --verbosity 5 --networkid ...
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1answer
143 views

Error while deploying smart contract (quorum-examples tutorial by truffle)

:~workspace/myproject$truffle migrate --reset Compiling your contracts... Everything is up to date, there is nothing to compile. Running migration: 1_initial_migration.js Replacing Migrations... ...
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1answer
85 views

Why is zether needed in Quorum if transactions are private between nodes?

As you may know JPMorgan has released zether which allows to make anonymous transactions in Quorum using zkp technology. But I have a question regarding why Quorum needs it. Since transactions ...
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27 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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29 views

how much structure variable does solidity support? [duplicate]

Error: "UnimplementedFeatureError: Variable inaccessible, too deep inside stack" code: contract create{ struct s{ string s1; string s2; string s3; string s4; ...
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58 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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64 views

Quorum how to decode result returned by eth_getQuorumPayload api?

I've read the post How to get decrypted transaction data in quorum? I followed the api document and got the result by calling eth_getQuorumPayload curl -H "Content-Type: application/json" -X POST ...
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1answer
133 views

Quorum Can a non permissioned node change the states of private contract if the node knows contract addr and ABI?

I have ran the quorum-example, deploying a private contract. https://github.com/jpmorganchase/quorum-examples/tree/master/examples/7nodes I followed the commands written in README. However, I'm quite ...
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43 views

TC failures observed for Quorum-2.2.3

2 TCs are failing on Big endian system, seems the issue is with the byte ordering only. 1) ethereum/go-ethereum/core/bloombits 2) ethereum/go-ethereum/swarm/storage/feed Can some one please comment ...
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1answer
65 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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1answer
155 views

Quorum deploy with Web3j timeout

SCENARIO: I have the following code: final String hostUrl = this.deployerProperties.getProperty("quorum.host.url"); final String hostPort = this.deployerProperties.getProperty("quorum.host.port"); ...
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55 views

How to show partial information on private transaction?

I want to achieve the following requirement in quorum blockchain. 1) Participant A sells a red asset to Participant B for 100 dollars. 2) Participant B paints the asset blue. 3) ...
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61 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
27 views

Can Qorum Blockchain supports partail transaction encryption?

My use case is that we need to protect sensitive data in the transaction in blockchain. But we want to open other data in the same transaction to the public, Can Quorum support the above mentioned ...
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1answer
140 views

deploying simple contract on quorum 7nodes example

I am trying to deploy contract with privateFor tag in migration and for set function same as shown in truffle quorum 7node example. started nodes with these commands ./raft-init.sh ./raft-start.sh ...
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2answers
127 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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2answers
136 views

Quorum blockchain transactions visibility

I am wondering if the content (transaction) of the consortium blockchain or Quorum blockchain can be visible only for the validators. In other words, the registered users (who can access the nodes) ...
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2answers
397 views

How to set up Quorum Blockchain?

I have read a lot about Quorum blockchain. My goal is to run and test it. I have found many articles. Could anyone suggest me good start-up articles for setting-up the Quorum on a number of nodes and ...