HttpProviderError problem

[SunjidulNiloy]

require("@nomiclabs/hardhat-waffle");
require("dotenv").config();

const { API_URL, PRIVATE_KEY } = process.env;

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  networks: {
    avaxchain: {
      url: API_URL,
      accounts: [`0x${PRIVATE_KEY}`],
       },
  },

  solidity: {
    version: "0.8.6",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1,
      },
    },
  },  
};

So I am having a problem deploying the contract on the avalanche test net, whenever I try to--> npx hardhat run scripts/deploy.js --network avaxchain
it shows an error of ---> error: ProviderError: HttpProviderError
Any suggestion?

[github-actions]

This issue is also being tracked on Linear.

We use Linear to manage our development process, but we keep the conversations on Github.

LINEAR-ID: e32f998c-e91f-4feb-b7e8-2f38ee7002d3

[sisco0]

After researching the topic, I found out that dotenv does not allow you to use destructuring for the process.env object.

A solution was provided by parceljs developers for their environment reader (see the PR linked in parcel-bundler/parcel#2191 for reference). However, no solution for dotenv seems to be active yet.
In that sense, the following URL could be checked as a reference mrsteele/dotenv-webpack#70.

Could you kindly retest by using the code snippet at the end of the current message and share the outcome?

  networks: {
    avaxchain: {
      url: process.env.API_URL,
      accounts: [`0x${process.env.PRIVATE_KEY}`],
       },
  },

[SunjidulNiloy]

error: ProviderError: HttpProviderError same problem

Do I have to add process.env on the .env file as well?

but that also gives error

Error HH8: There's one or more errors in your config file:
  * Invalid value undefined for HardhatConfig.networks.avaxchain.url - Expected a value of type string.        
  * Invalid account: #0 for network: avaxchain - private key too short, expected 32 bytes

To learn more about Hardhat's configuration, please go to https://hardhat.org/config/

[sisco0]

Could you kindly share us an .env file sample content?
Modify the fields in the regions you see convenient for privacy purposes.

[SunjidulNiloy]

sure

process.env.PRIVATE_KEY = 
process.env.API_URL = https://api.avax-test.network/ext/bc/C/rpc

[sisco0]

Could you kindly remove the process.env. portion in your .env lines and retry?
The file content should be something like as follows:

PRIVATE_KEY = YourPrivateKey
API_URL = https://api.avax-test.network/ext/bc/C/rpc

[SunjidulNiloy]

error: ProviderError: HttpProviderError

this error occurs

[LuisUrrutia]

I think that u didn't understand what @sisco0 is talking about.

dotenv does not allow you to use destructuring for the process.env object.

That means that you can't do this:
const { API_URL, PRIVATE_KEY } = process.env;

You have to access the value directly.
process.env.PRIVATE_KEY

So your example should look something like this:

require("@nomiclabs/hardhat-waffle");
require("dotenv").config();

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  networks: {
    avaxchain: {
      url: process.env.API_URL,
      accounts: [`0x${process.env.PRIVATE_KEY}`],
       },
  },

  solidity: {
    version: "0.8.6",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1,
      },
    },
  },  
};

[SunjidulNiloy]

Thank you for the info @LuisUrrutia , used your code but the same error occurs error: ProviderError: HttpProviderError

[fvictorio]

After researching the topic, I found out that dotenv does not allow you to use destructuring for the process.env object.

For the record, this is only true if you are using certain bundle tools. That's not the case for Hardhat; destructuring process.env should work just fine.

@Gizmolala your problem is likely an error in the node, but we have a bug were we are swallowing the proper error message returned by it, which will make it hard for you to debug this.

A super hackish thing you can try is this:

• Open the node_modules/hardhat/internal/core/providers/http.js file
• Search for the line that says if (isErrorResponse(jsonRpcResponse)) {
• Below that line, add console.log("error --->", jsonRpcResponse)

This should log the actual error you are getting.

I know this is a shitty workaround, and properly fixing this is high on our priority list.

[SunjidulNiloy]

Same error Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="execution reverted", method="estimateGas",
error: ProviderError: HttpProviderError

[fvictorio]

@Gizmolala sorry, I wasn't clear, I meant that you should see something that starts with error ---> in the output, and that that should explain what's going on. That change is just a hack to get more information, not an actual fix.

[SunjidulNiloy]

You mean add this line console.log("error --->", jsonRpcResponse) below this line if (isErrorResponse(jsonRpcResponse)) {
and then in terminal npx hardhat run scripts/deploy.js --network avaxchain to show the output right?

[fvictorio]

Yes

[SunjidulNiloy]

did that

Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (reason="execution reverted", method="estimateGas",
error: ProviderError: HttpProviderError

[RohitKS7]

@Gizmolala Try adding gasPrice manually like this

        avaxchain: {
            url: RPC_URL,
            gasPrice: 225000000000,
        },

[codingwithmanny]

From my understanding I thoughts that why we have these settings, but please correct me if I wrong in terms of these setting estimating the gas price as well:

{
      gasPrice: "auto",
      gas: "auto",
      allowUnlimitedContractSize: true,
}

[fvictorio]

Closing this in favor of #1222, because I think that the main issue here is that we are not showing the error message returned by the node.