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What is Layer 2

Layer 2 is a blockchain scaling technology that processes transactions outside the main blockchain.

These solutions increase transaction speed and reduce network fees. Examples include Base, Arbitrum, and other scaling networks.

Key facts​

  • operates on top of the main blockchain
  • increases network throughput
  • reduces transaction fees
  • used to scale blockchain networks

Simple explanation​

Layer 2 is an additional layer of blockchain infrastructure that helps networks process transactions faster and more cheaply.

How Layer 2 works​

Layer 2 solutions process a portion of transactions outside the main blockchain.

The process typically works as follows:

  1. transactions are processed off-chain
  2. they are grouped into batches
  3. the final data is recorded on the main blockchain

This means the base layer only receives summarized data.

Where Layer 2 is used​

Layer 2 is used in various blockchain ecosystems:

  • scaling Ethereum
  • DeFi applications
  • NFT platforms

Role of Layer 2 in the blockchain ecosystem​

Layer 2 plays a key role in scaling blockchain networks.

Most blockchains have limited transaction capacity. This means that the number of transactions the network can process per second is restricted.

Second-layer solutions allow significantly more transactions to be processed without modifying the core blockchain protocol.

The concept of Layer 2 is discussed in more detail in a separate section.

FAQ​

Why is Layer 2 needed?​

Layer 2 increases the transaction capacity of blockchain networks.

Does Layer 2 reduce transaction fees?​

Yes. Most Layer 2 solutions significantly lower transaction costs.

Is Layer 2 a separate blockchain?​

No. It operates on top of the main blockchain.

What are examples of Layer 2 networks?​

Examples include Arbitrum, Optimism, and Polygon.