Ethereum: Hardhat throw Error: yParity mismatch (argument=”signature”, …… ) when i try to deploy smartcotnract in sepolia testnet

Ethereum Hardhat Throw Error: yParity Mismatch

As a developer working on Ethereum-based projects, you may encounter a hardhat throw error when deploying smart contracts on the SEPOLIA testnet. This article will guide you through troubleshooting and resolving the issue.

What is a Hardhat Throw Error?

A hardhat throw error occurs when a task in a hardhat configuration fails or encounters an unexpected situation that prevents it from completing successfully. These errors are difficult to resolve, especially for new developers.

Hardhat Throw Error: yParity Mismatch (argument=”signature” etc.)

The error message provided is quite specific and points to a problem in the ‘yParity’ library of Hardhat. Here is a breakdown of what the error could mean:

• “Hardhat Throw Error”: This indicates that there is a problem with the hardhat configuration that needs to be fixed.

• “yParity mismatch”: This indicates that the “yParity” library, which is likely used to deploy smart contracts, has encountered an inconsistency or mismatch with expected behavior.

• (argument="signature" etc.): These are additional details in the error message.

Troubleshooting steps

To resolve this issue, follow these steps:

Step 1: Check the “yParity” installation

Make sure the “yParity” library is installed correctly and up to date. Run:

npm install yparity

yarn add yparity

If you are using a custom implementation, make sure it is compatible with Hardhat.

Step 2: Check Hardhat configuration

Check the Hardhat configuration file (hardhat.config.js) to ensure that you are using the yParity library correctly. Check specifically for errors or warnings related to yParity.

// hardhat.config.js
module.exports = {
// Other configurations...
async deploy() {
const { network } = await getNetwork();
const ethers = request('ethers');
try {
const deployScript = await loadScript(
import yparity from @y parity/core;
console.log(yparity);
// The installation script is here
);
const provider = new ethers.providers.JsonRpcProvider(network.address, network.version);
const deployedContract = await deployScript.provider call({
data: {
address: "0x...",
},
encoding: json,
number of inputs: 1,
args: [],
value: ethers.utils.parseEther('1'),
gasPrice: ethers.constants.GAS_price,
});
console.log(Address of deployed contracts: ${deployedContract.address});
} catch (error) {
console error (error);
}
},
};

Step 3: Check Hardhat scripts

Check the deployed scripts (scripts/deploy.js) to make sure they are correct and working as expected.

Step 4: Test the installation on the SEPOLIA Testnet

Once you have resolved the “yParity” issues, try deploying your smart contract on the SEPOLIA testnet using the alchemy API:

npx hardhat scripts/deploy.js --network sepolia run

`

If the issue persists, please contact the Hardhat community or the SEPOLIA customer support team for further assistance.

Conclusion

Resolving the yParity error on Hardhat can be difficult. By following these troubleshooting steps and reviewing the configuration files, you should be able to identify and fix the issue. If the issues persist, don’t hesitate to ask the community or industry experts for help.

METAMASK INTERACT WITH SMART CONTRACT