📚 In the previous article, we explored zk-rollups, a scaling solution that verifies transactions using cryptographic proofs.
However, there is another important type of rollup called Optimistic Rollup.
Optimistic Rollup is a Layer 2 technology that processes transactions outside the main blockchain and sends the results back to Layer 1.
The key difference is that Optimistic Rollups assume transactions are valid by default.
Instead of verifying every transaction immediately, the system allows transactions to be submitted and only checks them if someone raises a dispute.
This approach helps the network process many transactions quickly while still maintaining security.
Here are the key ideas behind Optimistic Rollups.
1️⃣ Transactions are assumed to be valid
The system accepts transactions without verifying each one immediately.
2️⃣ Uses a challenge period
There is a period of time where anyone can challenge a transaction if they believe it is invalid.
3️⃣ Fraud proofs protect the system
If someone detects a bad transaction, they can submit proof that it is incorrect.
4️⃣ Improves scalability
By reducing the amount of computation on the main blockchain, Optimistic Rollups help increase transaction throughput.
A simple example can help explain this idea.
Imagine a company reviewing thousands of expense reports.
Instead of checking every receipt immediately, they approve the reports first.
However, there is a review period where auditors can check the reports and flag any suspicious activity.
If a mistake or fraud is found, the report is rejected.
Optimistic Rollups work in a similar way.
Transactions are accepted quickly, but the system allows time for the network to challenge any invalid activity.
This balance between speed and security makes Optimistic Rollups a popular scaling solution.
📌 In the next article, we’ll explore:
What sharding is and how blockchains can split work across multiple parts of the network to scale further.
If you’re just starting to learn about crypto, follow the Crypto 101 series as we build the foundation step by step. 🚀
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