---
title: "What Is Layer 1 Crypto? Understanding the Base Blockchain Layer"
description: "Layer 1 crypto is the main blockchain that validates and finalizes transactions. Learn what Layer 1 means in crypto, how it differs from Layer 2, and explore examples like Bitcoin, Ethereum, and Solana."
url: "https://cryptoprocessing.com/glossary/what-is-layer-1-crypto"
modified: "2026-03-14T01:29:04+00:00"
---

# Layer 1

Layer 1 crypto refers to the base blockchain that validates, orders, and finalizes transactions on its own network. It’s the foundational ledger where consensus happens and where assets are issued and settled.

## Key characteristics of layer 1 blockchains

Layer 1 in blockchain means the main chain that provides security and data availability. Other networks (Layer 2s) can build on top of it, but the layer 1 chain remains the source of final settlement.

- Native consensus and security. Validators or miners run the core protocol (e.g., proof-of-stake or proof-of-work) and finalize blocks on the main chain.
- Asset issuance and fees. The base token (BTC, ETH, SOL, etc.) pays transaction fees and often secures the network via staking or mining.
- Programmability (varies by chain). Some layer 1s support general smart contracts; others use more limited scripting focused on payments.
- Data availability and finality. Transactions and state are stored on-chain; finality time depends on the protocol’s design.
- Interoperability. Bridges and messaging help move assets and data between chains and between layer 1 and layer 2 networks.
- Governance and upgrades. Rule changes, forks, and improvements are coordinated through each chain’s governance process.

## A list of examples

Here is a quick layer 1 crypto list used in practice (not exhaustive):

*Bitcoin (BTC)*, *Ethereum (ETH)*, *Solana (SOL)*, *BNB Smart Chain (BNB)*, *Avalanche (AVAX)*, *Cardano (ADA)*, *Tron (TRX)*, *XRP Ledger (XRP)*, *Litecoin (LTC)*, and *Polkadot (DOT)*.

The layer 1 crypto meaning across these examples is the same: each chain finalizes its own transactions and anchors security at the base layer, even though performance, fees, and programmability differ.