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Smart Contract Security Challenges
Find and solve vulnerabilities in real-world smart contract scenarios.
Easy
Solidity
Variable Modification
A simple exercise to learn how to modify state variables in a smart contract.
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Easy
Solidity
Split Bank
You've deposited funds, but the owner is taking a large share. Can you find a way to get your money back?
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Easy
Solidity
Predictable Lottery
Users are invited to guess a random number generated by the contract. A minimum deposit is required, and if the guess matches the generated number, the contract sets the caller as the winner.
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