Testing Smart Contracts with Remix: Revenue Sharing Contract

Introduction to Remix

Remix is Ethereum's official online Integrated Development Environment (IDE). It offers robust features for smart contract development, including:

• Full compiler support
• Contract execution
• Environment setup
• Contract deployment

This guide explores a Revenue Sharing Contract—a classic Ethereum smart contract—and walks you through testing it on Remix.

👉 Master smart contract testing with Remix

Part 1: Revenue Sharing Contract Explained

Key Concept

The Revenue Sharing Contract allocates funds proportionally among predefined addresses. Participants can send funds to the contract, which distributes them equally (or unequally) to registered addresses.

Contract Versions

Originally from Blockchain Applications: A Hands-On Approach (Bahga & Madisetti), the contract was updated from Solidity v0.4.8 to v0.5.11 to align with modern standards.

Key Differences:

• v0.4.8: Legacy syntax (e.g., var declarations, older function modifiers)
• v0.5.11: Updated safety checks (e.g., explicit address payable, emit for events)

Part 2: Testing the Contract in Remix

Step 1: Compile the Contract

1. Open Remix IDE.
2. Paste the contract code into a new .sol file.
3. Select the Solidity compiler (v0.5.11+).

4. Click Compile and review:

   • Bytecode
   • ABI
   • Web3 Deploy details

Step 2: Deploy to JavaScript VM

1. Navigate to Deploy & Run Transactions.

2. Set:

   • Environment: JavaScript VM
   • Gas Limit: Default (no adjustment needed)
   • Value: 0 (unless testing fund transfers)

3. Input constructor arguments (e.g., recipient addresses):

   ["0xCA35b7d...", "0x14723A0...", "0x4B0897b..."]

4. Click Deploy.

Part 3: Interacting with the Deployed Contract

Actions:

• Check Variables: Verify address balances post-deployment.

• Test Fund Distribution:

  1. Set Value to 40 ETH.
  2. Call ShareRevenue() to split funds among addresses.
  3. Confirm unequal distributions (if configured).

Expected Outcome:

• 40 ETH is deducted from the sender.
• Funds are split as programmed (e.g., 10 ETH per address or custom ratios).

FAQ Section

Q1: Why use Remix over other IDEs?

A: Remix offers built-in testing tools, no local setup, and direct blockchain integration for beginners.

Q2: How do I debug compilation errors?

A: Check Solidity version compatibility and update syntax (e.g., address payable in v0.5.0+).

Q3: Can I modify distribution ratios?

A: Yes! Adjust the constructor or function logic to weight specific addresses.

👉 Explore advanced smart contract techniques

Key Takeaways

• Remix simplifies smart contract testing with an intuitive UI.
• Revenue Sharing Contracts demonstrate automated fund distribution.
• Always validate bytecode and ABI before mainnet deployment.

References

• Blockchain Applications: A Hands-On Approach
• Solidity Documentation