Layer-2

A secondary network built on top of a base blockchain to make transactions faster and cheaper while inheriting the base layer's security.

Definition

Layer-2 solutions, such as rollups on Ethereum or the Lightning Network on Bitcoin, process transactions off the congested base chain and periodically settle back to it, cutting fees and latency. For crypto gambling this can make small, frequent bets and near-instant withdrawals economically viable where base-layer gas fees would be prohibitive. Trade-offs include added complexity, security and decentralisation assumptions that vary between L2 designs, bridge risks when moving funds on and off the layer, and the need for both parties to support the same network.

Worked example

A casino using a Layer-2 or the Lightning Network can offer cheap, fast BTC or ETH withdrawals that would be slow and costly directly on the base chain.

Why it matters

Explains how crypto gambling achieves low fees and speed; professionals must weigh bridge and security-model trade-offs.

Related

Note: The Layer-2 landscape is developing quickly, and security and decentralisation properties differ substantially between solutions.