A Practical Take on Smart Contract Safety

Immutability is powerful, but it changes the cost of being wrong.

Before deploying a contract, I want the simplest possible mental model: what can change, what cannot, and what happens when the unexpected path is taken?

Small surfaces

Every extra permission is another branch in the threat model.

function withdraw(uint256 amount) external onlyOwner {
    payable(msg.sender).transfer(amount);
}

The goal is not perfect certainty. The goal is making failure understandable before money is involved.