Questions tagged [quorum]

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

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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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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
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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
918 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
792 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
418 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
524 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
225 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
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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
608 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
209 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
405 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
361 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/...
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1answer
870 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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104 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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2answers
556 views

How does Quorum prevent double spending when states are encrypted?

My understanding of Quorum is that private contracts have encrypted states hence I am confused as to how they reach consensus and prevent double spending. If each state is encrypted how can the nodes ...
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1answer
175 views

Log field in Transaction reciep

I want to set some data in the Log field in a transaction using Ethereum, i used in smart contract event method but i got always empty logs could anyone help me please? Thank you
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2answers
292 views

Smart contract listeners

I want to develop a method in a smart contract that act as a listener, what i mean is when i use eth.sendTransaction(from:, to:@ of smart contract) it will be executed, without calling any smart ...
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1answer
636 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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1answer
266 views

Hiding some transaction data

I want to add data in Quorum that are visible only to specific users, how could i implement that ? Thank you
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3answers
4k views

Where can I find the source code for Quorum, the permissioned implementation of Ethereum supporting data privacy?

Where can I find the source code for Quorum, the permissioned Go implementation of Ethereum supporting data privacy?

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