State Variable Default Visibility: The Hidden Bug in Your Solidity Code!

When building smart contracts in Solidity, did you know that state variables default to internal visibility if not specified? While this might seem fine, it can cause issues when you need to interact with those variables from another contract or dApp.

In this video, we cover:

- What happens when state variables are left without visibility specifiers.
- A real example of vulnerable code and how it fails when accessed externally.
- The simple fix: explicitly declaring visibility as public to avoid errors.
- Best practices for Solidity developers to make contracts more predictable and secure.

Key Takeaways:

- Always define the visibility of state variables.
- Use public visibility when external access is needed.

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