"npm run deploy:hello-zksync" results in "Error: socket hang up"

[h4xhor]

Hi I'm following the guide on ZKsync and I'm up to here https://docs.zksync.io/build/start-coding/zksync-101/hello-zksync.

When I run this command:

npm run deploy:hello-zksync

I get this error:

> [email protected] deploy:hello-zksync
> hardhat deploy-zksync --script 1-hello-zksync/deploy.ts


Starting deployment process of "CrowdfundingCampaign"...
Error: socket hang up
    at Socket.socketOnEnd (node:_http_client:530:25)
    at Socket.emit (node:events:530:35)
    at Socket.emit (node:domain:489:12)
    at endReadableNT (node:internal/streams/readable:1698:12)
    at processTicksAndRejections (node:internal/process/task_queues:90:21)

I am on Debian 12 and have installed Docker Desktop.

I am using:

• nodejs 22.11.0
• npm 10.9.0
• npx 10.9.0
• pnpm 9.14.4

I confirmed with nmap that the port 8011 on Docker is open.

Any suggestions on what else to try greatly appreciated. Thank you.

[bxpana]

Thanks for reaching out, I was able to replicate a similar issue to what you got and will look into it. Just to check, does it work if you switch to zkSyncSepoliaTestnet?

[h4xhor]

Hi @bxpana,

Thanks for your help. Yes it works fine if I use zkSyncSepoliaTestnet. After updating .env to use my Sepolia Testnet account I ran:

npx hardhat deploy-zksync --network zkSyncSepoliaTestnet --script 1-hello-zksync/deploy.ts

and got the output:

Starting deployment process of "CrowdfundingCampaign"...
Estimated deployment cost: 0.00001201235 ETH

"CrowdfundingCampaign" was successfully deployed:
 - Contract address: 0x668a74ea3eADad5b712543c158Fe791b453dC3f5
 - Contract source: contracts/1-hello-zksync/CrowdfundingCampaign.sol:CrowdfundingCampaign
 - Encoded constructor arguments: 0x00000000000000000000000000000000000000000000000000470de4df820000

Requesting contract verification...
[WARNING] Since Etherscan is disabled or the API key is missing, verification will default to the ZKSync block explorer.
Your verification ID is: 32641
Error in plugin @matterlabs/hardhat-zksync-verify: Failed to send contract verification request
 Reason: ZkSyncVerifyPluginError: Compilation errorParserError: Expected ';' but got identifier
  --> contracts/1-hello-zksync/CrowdfundingCampaign.sol:17:9:
   |
17 |         owner = msg.sender;
   |         ^^^^^



For more info run Hardhat with --show-stack-traces

I confirmed that reads from the contract also works:

$ zksync-cli contract read \
--chain zksync-sepolia \
--contract 0x668a74ea3eADad5b712543c158Fe791b453dC3f5 \
--abi artifacts-zk/contracts/1-hello-zksync/CrowdfundingCampaign.sol/CrowdfundingCampaign.json
Using provided ABI file
? Contract method to call getFundingGoal() view returns (uint256)

✔ Method response (raw): 0x00000000000000000000000000000000000000000000000000470de4df820000
✔ Decoded method response: 20000000000000000

Run this directly: npx zksync-cli contract read --chain "zksync-sepolia" --contract "0x668a74ea3eADad5b712543c158Fe791b453dC3f5" --method "getFundingGoal()" --output "uint256" --abi "artifacts-zk/contracts/1-hello-zksync/CrowdfundingCampaign.sol/CrowdfundingCampaign.json"

[bxpana]

Thanks for the confirmation. I am running into a similar connection issue to the in-memory node but able to deploy on ZKsync Sepolia too. I went ahead and opened an issue for the zksync-cli to have the team look into fixing that matter-labs/zksync-cli#179

[bxpana]

@h4xhor the issue was closed and a fix was released. You can upgrade with zksync-cli dev update zkcli-in-memory-node

Thanks again for the heads up and let us know if you run into anything else.

[h4xhor]

Thank you @bxpana. It works perfectly!