Layer 2 Scaling Solutions (e.g., Arbitrum, Optimism)
Overview:
Layer 2 (L2) solutions are technologies built on top of blockchains like Ethereum to improve scalability, reduce transaction fees, and increase speed—without compromising the security of the base layer (Layer 1).
Why They Matter:
Ethereum can process about 15 transactions per second (TPS), which causes network congestion and high gas fees. L2s offload the bulk of activity from the main chain, making it cheaper and faster.
Common Layer 2 Types:
Rollups – Bundle many transactions into one and submit it to Layer 1:
Optimistic Rollups (e.g., Optimism, Arbitrum): Assume transactions are valid by default; challenge window for fraud proofs.
ZK-Rollups (e.g., zkSync, StarkNet): Use zero-knowledge proofs to instantly verify transaction correctness.
State Channels – Allow users to transact off-chain and settle the final result on-chain (e.g., Lightning Network for Bitcoin).
Plasma – A framework for creating child blockchains that periodically report to the main Ethereum chain.
Real-World Example:
If sending an NFT on Ethereum costs $15 in gas fees, using Arbitrum might only cost $0.10 for the same transaction.
$ETH
Overview:
Layer 2 (L2) solutions are technologies built on top of blockchains like Ethereum to improve scalability, reduce transaction fees, and increase speed—without compromising the security of the base layer (Layer 1).
Why They Matter:
Ethereum can process about 15 transactions per second (TPS), which causes network congestion and high gas fees. L2s offload the bulk of activity from the main chain, making it cheaper and faster.
Common Layer 2 Types:
Rollups – Bundle many transactions into one and submit it to Layer 1:
Optimistic Rollups (e.g., Optimism, Arbitrum): Assume transactions are valid by default; challenge window for fraud proofs.
ZK-Rollups (e.g., zkSync, StarkNet): Use zero-knowledge proofs to instantly verify transaction correctness.
State Channels – Allow users to transact off-chain and settle the final result on-chain (e.g., Lightning Network for Bitcoin).
Plasma – A framework for creating child blockchains that periodically report to the main Ethereum chain.
Real-World Example:
If sending an NFT on Ethereum costs $15 in gas fees, using Arbitrum might only cost $0.10 for the same transaction.
$ETH