✅ Master Rollup Fundamentals
Understand transaction bundling, rollup types, and Layer 2 scaling
Scale Ethereum with Layer 2 rollup technology
Your Progress
0 / 5 completed🎓 Key Takeaways
Let's review everything you've learned about rollups - from fundamentals to real-world applications.
📦 Rollup Fundamentals
- •Layer 2 Scaling: Process transactions off-chain, post data to L1
- •Transaction Bundling: Batch 100-1000s transactions into one L1 submission
- •Cost Reduction: 100-500x cheaper than Ethereum L1
- •Security: Inherits Ethereum's security through data availability
- •Performance: 2000-4000 TPS vs 15 TPS on L1
🔄 Transaction Bundling
- •Collecting: Sequencer gathers transactions in mempool
- •Compression: 90% data reduction through aggregation
- •Submission: Post compressed batch to Ethereum as calldata
- •Shared Costs: Gas fees split across all transactions
- •Efficiency: $50 batch cost / 500 txs = $0.10 per tx
⚖️ Optimistic vs ZK
- •Optimistic: Assume valid, use fraud proofs if challenged
- •ZK: Cryptographic validity proofs for every batch
- •Withdrawals: 7 days (optimistic) vs hours (ZK)
- •Costs: Optimistic cheaper, ZK more expensive (proving)
- •Maturity: Optimistic more mature, ZK rapidly improving
🌍 Real World Leaders
- •Arbitrum: $6.5B TVL, 400+ dApps, full EVM compatibility
- •Optimism: $2.5B TVL, OP Stack framework, strong governance
- •zkSync: $600M TVL, fast withdrawals, growing ecosystem
- •Use Cases: DeFi, gaming, NFTs, payments
- •Future: zkEVM, EIP-4844, cross-L2 interoperability
📝 Knowledge Check Quiz
Test your understanding of rollups. You need 3/5 correct to pass.