EVM Contract: Your Path to Advanced Web3 Development

Introduction

As the DoraHacks hackathon continues to gain momentum, many projects have already applied to participate in this exciting event. For developers eager to join but struggling with setting up the right environment and tools for EVM contract deployment, this guide provides comprehensive solutions to overcome these challenges.

Setting Up Your Development Environment and Tools

EVM smart contracts originated on the Ethereum network and are primarily written in Solidity. Developers can leverage existing Ethereum contract frameworks to build and deploy contracts on Ontology's EVM.

Remix IDE

Remix IDE is an open-source development environment for EVM contracts. Follow these steps for deployment:

1. Initialize Remix: Set up the environment and create a Solidity-based contract file.
2. Compile Contract: Use the 0.5.10 compiler to edit your contract file.
3. Deploy Contract: Deploy the compiled contract onto the Ontology EVM network.
4. Invoke Contract: Execute and interact with your deployed contract.

For detailed Remix IDE documentation, visit the official guide.

Truffle Suite

Truffle provides tools and frameworks for EVM contract development, testing, and management:

1. Install Truffle: Initialize your project, install dependencies, and run the installation code.
2. Configure truffle-config: Create a .secret file to store mnemonic phrases or private keys, then edit the configuration.
3. Deploy Contract: Migrate your developed contract to the Ontology EVM network using Truffle.

👉 Explore Truffle's quickstart guide for more details.

Hardhat

Hardhat is an Ethereum development environment with steps similar to Truffle:

1. Install Hardhat
2. Configure hardhat-config
3. Deploy Contract

Refer to Hardhat's official documentation for installation specifics.

Configuring MetaMask

To deploy and execute EVM contracts, you'll need a decentralized Web3 client like MetaMask:

1. Initialize Web3: Create a Web3 instance by adding ethereum to MetaMask's global objects.
2. Set Up Account: Retrieve the account used during instance creation.
3. Initialize Contract: Prepare your contract for interaction.
4. Call Functions: Directly interact with instantiated contracts through function calls.

Developing Your Contract (Hardhat Example)

Environment Setup

• Install Node.js
• Install Hardhat

Contract Design

• Contract Logic: Define data structures based on core functionalities (e.g., a red packet app requiring amount/number specifications).
• Contract Events: Add events to track execution (e.g., "Red packet sent" or "Red packet received").
• Functions: Implement functions to complete workflows.

Compilation and Testing

1. Create a Hardhat project
2. Configure hardhat.config
3. Add contract files to the contracts folder
4. Include test scripts
5. Compile contracts via root directory commands
6. Run tests

Successfully completing these steps means you've built a dApp on Ontology EVM! For all necessary code snippets, consult the EVM Contract technical documentation.

FAQ Section

1. Which IDE is best for EVM contract development?

Remix IDE offers beginner-friendly features, while Hardhat and Truffle provide advanced customization for complex projects.

2. How do I troubleshoot MetaMask connection issues?

Ensure your network RPC URL matches Ontology EVM's specifications and that MetaMask's chain ID is correctly configured.

3. What Solidity compiler version should I use?

For compatibility with Ontology EVM, use version 0.5.10 unless your contract requires newer functionality.

👉 Discover advanced EVM development strategies to enhance your dApp's performance.

4. Can I test contracts without deploying them?

Yes! Hardhat and Truffle both include local test networks for pre-deployment validation.

5. Where can I find EVM contract examples?

The Ontology documentation provides template contracts for common use cases like token creation and smart wallets.

6. How gas-efficient is Ontology's EVM compared to Ethereum?

Ontology EVM offers competitive gas fees while maintaining full bytecode compatibility with Ethereum's execution environment.