AbQuiz

AbQuiz is a simple smart contract that introduces new developers to core blockchain concepts such as:

1. Ownership control (onlyOwner modifier)

2. Data immutability and transparency

3. Hashing for secure answer storage (keccak256)

4. Event emission (QuizWon) for on-chain notifications

   Once deployed, the contract lets the quiz owner set a question and store a hashed version of the correct answer (so nobody can read it directly from the blockchain).
   Participants then submit answers — the first correct one is logged forever as the winner!

repo link - AbQuiz

The Mission
The primary mission of this project is Educational. It serves as a gateway for developers entering the Celo ecosystem to understand:

• How to hide data on a public ledger.
• How to write logic for ownership and state changes.
• How to use events for frontend notifications.

repo link - AbQuiz

Blockchain quiz platform rewarding correct answers.

The solution
AbQuiz solves these issues using smart contract logic:

1. Cryptographic Hashing: Instead of storing the answer in plain text, we store the keccak256 hash. The contract verifies submissions by hashing them and comparing the result. This keeps the answer secret on-chain.
2. Immutability: The setQuiz function can only be called once. Once the question is live, the owner cannot tamper with it.
3. Automated Verification: The contract logic dictates that the first transaction with the correct answer triggers the win state. No manual review is required.

repo link - AbQuiz

India