Cronos Hardhat Boilerplate

Hardhat dependencies (including typescript dependencies) included in this repo

This project was created with npx hardhat (see hardhat.org), using Typescript.

It leverages the following libraries:

• OpenZeppelin contracts (https://docs.openzeppelin.com/contracts/)

Set-up

npm install

Set-up configuration file hardhat.config.ts including network details for Cronos blockchain.

Create .env file for environment variables, using .env.example as template.

Create your contract(s)

In the /contracts directory.

Use https://wizard.openzeppelin.com/ to generate standard code.

Local deployment and testing

Compile the smart contracts:

npx hardhat compile

Execute the test script, and then calculate the test coverage of the smart contract code:

npx hardhat test
npx hardhat coverage

The test also incluces a gas report when the .env file includes: REPORT_GAS=true npx hardhat test

Deploy the smart contract to the local blockchain network:

npx hardhat run scripts/DeployMyERC20.script.ts --network hardhat

Deployment to Cronos

Cronos Tesnet:

npx hardhat run scripts/DeployMyERC20.script.ts --network cronosTestnet

Cronos Mainnet:

npx hardhat run scripts/DeployMyERC20.script.ts --network cronos

Contract verification on Cronoscan

Contract verification requires custom chain configuration in hardhat.config.ts. See the hardhat.config.ts file in this repository for Cronos testnet and mainnet configurations.

Check list of supported network:

npx hardhat verify --list-networks

Verify on Cronos Testnet:

npx hardhat verify --network cronosTestnet DEPLOYED_CONTRACT_ADDRESS "Constructor argument 1" "Constructor argument 2"

For example in this case:

npx hardhat verify --network cronosTestnet "0x3F273114f20f87C602D87E1f1cd87D6F3ae5Ac72" --constructor-args "./scripts/deploy-verification-arguments.js"

or

npx hardhat verify --network cronosTestnet "0x3F273114f20f87C602D87E1f1cd87D6F3ae5Ac72" "My token name" "My token symbol"

Verify on Cronos Mainnet:

npx hardhat verify --network cronos DEPLOYED_CONTRACT_ADDRESS "Constructor argument 1" "Constructor argument 2"

for example in this case:

npx hardhat verify --network cronos "0x5110ceB3f5fEd7484fda722A775927d238275D44" --constructor-args "./scripts/deploy-verification-arguments.js"