Deploying to Quorum with OpenZeppelin CLI

Hello, I added OpenZeppelin to my Truffle project. When I deploy to a Quorum network with ‘truffle deploy’ it works just fine, but if I deploy using ‘oz deploy’ then I get an error saying “Could not connect to your Ethereum client…”. The configuration file is the same as when I deployed via Truffle. Anyone has any idea what the issue could be? Thanks in advance :slight_smile: Let me know if I should provide some other information.

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Hi @Alex-dev,

Are you deploying a regular contract?
If you are wanting to deploy an upgradeable contract I recommend using OpenZeppelin Upgrades Plugins for Truffle:

What version of node/npm and operating system are you using?
I assume that you are running a local Quorum network?

Hello @abcoathup and thank you for the reply,

I am actually trying to deploy to Azure’s Quorum service. I wasn’t able to set up a private Quorum (on Windows) so I haven’t been able to try local deployment on Quorum.
I am using the following versions:

  • Truffle - 5.1.44
  • Node - 12.18.2
  • npm - 6.14.5
  • OpenZeppelin - 2.8.2

I am trying to deploy an upgradeable contract. I have not yet tried to use the plugin you mentioned because I was able to get an upgradeable contract to work on my private ethereum blockchain and thought; if this works, surely it should work on Quorum!
I did this by running “npx oz deploy…” and was later able to run “npx oz upgrade …” and it all worked fine (on my local ethereum blockchain).

As I mentioned in my original post, I was able to deploy to the Quorum network using “truffle deploy” but “npx oz deploy” gives me an error - despite both of them using the same truffle-config.js file. Please see code snippet below for the content of the config file.

module.exports = {
      networks: {
        quorum: {
    		url: <Azure https connection>,
            gasPrice: 0,
    		gas: 0,
            network_id: "*",
            type : "quorum"
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Hi @Alex-dev,

Truffle has support for Quorum and in the networks configuration includes:

type: "quorum" // needed for Truffle to support Quorum

I have in the past deployed to a local Quorum using OpenZeppelin CLI but private transactions and private contracts are not supported.

Given that Truffle has Quorum support I would suggest trying the OpenZeppelin Upgrades Plugins, though I assume this will only support a public contract.

As an aside, If you are a Windows user I recommend using Windows Subsystem for Linux. I use WSL2 on Windows 10. You could have a look at the following: Solidity Smart Contract development on Windows

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A post was split to a new topic: Is it possible to deploy upgradeable contracts to Quorum?