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Hardhat | Celo Composer

This project demonstrates a basic Hardhat use case. It comes with a sample contract, a test for that contract, and a sample script that deploys that contract.

Setup & Installation

Alfajores Testnet Setup

Note This setup is not required when using a local development blockchain (like celo-devchain or Ganache).

  1. Create a .env file similar to .env.example.
  2. Paste the private key in .env.

    note: depending on how you generate your private key, you may have to prepend 0x in the private key does not already have it prepended.

  3. Faucet your account with the Alfajores testnet faucet here.

Develop

  1. Write your contracts in ./contracts.
  2. Update contract deployment scripts in ./deployscripts.
  3. Deploy contracts with yarn deploy from the root directory. The default deployment network is specified in hardhat.config.js and is set to alfajores initially.
  4. You can specify a specific network deployment directly with
npx hardhat deploy --network [network name]

Network configs are defined in hardhat.config.js.

Verify your contracts

hardhat-celo

You can easily verify your contracts deployed to the associated networks with hardhat-celo.

Reference

npx hardhat verify smart-contract-address parameter(s) --network alfajores

On Mainnet:

npx hardhat verify smart-contract-address parameter(s) --network celo

Sourcify

Additionally, you can easily verify your contracts deployed to the associated networks with the following commands.

Reference

On Alfajores:

npx hardhat --network alfajores sourcify

On Mainnet:

npx hardhat --network celo sourcify

Deploy with Figment Datahub

Figment Datahub provides RPC & REST APIs for Celo network. To learn more about Datahub refer this doc - https://docs.figment.io/introduction/what-is-datahub. Follow these steps to deploy your smart contract with Figment datahub's RPC.

  • Create account on Datahub.
  • On the dashboard, click on Create new app and select Celo from the protocol list.
  • Once you have created an app, copy the api key.
  • Edit hardhat.config.js and update alfajoresDatahub and celoDatahub with the API Key.
  • Run the test or deploy the contract with following commands.
npx hardhat run scripts/deploy.ts --network alfajoresDatahub

npx hardhat run scripts/deploy.ts --network celoDatahub