Hardhat deployment scripts in Blockchain / Solidity - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the Hardhat runtime environment.

Blockchain / Solidity

const hre = require('[1]');

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Aethers

Bhardhat

Cweb3

Dtruffle

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'ethers' instead of 'hardhat' to import hre.

Trying to import 'web3' which is a different library.

The Hardhat runtime environment is imported using require('hardhat').

2fill in blank

medium

Complete the code to get the contract factory for deployment.

Blockchain / Solidity

const Contract = await hre.ethers.getContract[1]('MyContract');

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AInstance

BProvider

CSigner

DFactory

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'getContractInstance' which does not exist.

Using 'getContractSigner' which is unrelated.

To deploy a contract, you get its factory using getContractFactory.

3fill in blank

hard

Fix the error in the deployment code to wait for the contract to be deployed.

Blockchain / Solidity

const contract = await Contract.deploy();
await contract.[1]();

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AdeployTransaction

Bdeploy

Cdeployed

Dwait

Attempts:

3 left

💡 Hint

Common Mistakes

Calling 'deploy()' again instead of 'deployed()'.

Using 'wait()' which is not a method on the contract instance.

After calling deploy(), you wait for deployment with deployed().

4fill in blank

hard

Fill both blanks to log the deployed contract address and exit the script.

Blockchain / Solidity

console.log('Contract deployed to:', contract.[1]);
process.[2](0);

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Aaddress

Bexit

Cdeployed

Dstop

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'deployed' instead of 'address' for the contract property.

Using 'stop' instead of 'exit' to end the process.

The deployed contract address is accessed with address. To end the script, use process.exit(0).

5fill in blank

hard

Fill all three blanks to handle errors and run the main deployment function.

Blockchain / Solidity

async function main() {
  // deployment code
}

main()
  .[1](() => process.exit(0))
  .[2]((error) => {
    console.error(error);
    process.[3](1);
  });

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Athen

Bcatch

Cexit

Dfinally

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'finally' instead of 'catch' for error handling.

Using 'stop' instead of 'exit' to end the process.

Promises use then for success and catch for errors. To exit with error code, use process.exit(1).