Layer 1 (L1)
A base blockchain network like Ethereum, Solana, or BNB Chain that handles all transaction settlement directly on-chain.
Layer 1 (L1) — A Layer 1 (L1) blockchain is the base-level network that processes and finalizes transactions using its own consensus mechanism and validator set. Examples include Ethereum, Solana, BNB Chain, and Bitcoin. Layer 1 chains provide the foundational security and data availability that higher layers depend on.
What Is a Layer 1 Blockchain?
A Layer 1 blockchain is the primary network architecture that maintains its own ledger, runs its own consensus protocol, and settles transactions without relying on any external chain. Every transaction, smart contract execution, and state change is validated and recorded directly on the L1.
Major Layer 1 networks include Ethereum (proof-of-stake), Solana (proof-of-history combined with proof-of-stake), BNB Chain (proof-of-staked-authority), and Bitcoin (proof-of-work). Each L1 makes different trade-offs between decentralization, throughput, and transaction cost.
How Layer 1 Networks Operate
Layer 1 chains rely on a distributed network of validators or miners who propose and verify blocks. On Ethereum, approximately 900,000 validators stake 32 ETH each to participate in block production. On Solana, around 1,900 validators process up to 65,000 transactions per second theoretically, though real-world throughput averages 2,000 to 4,000 TPS.
The consensus mechanism determines how validators agree on the correct state of the chain. Proof-of-stake chains select block proposers based on staked capital, while proof-of-work chains require miners to solve computational puzzles. The choice of consensus directly affects block time, finality speed, and energy consumption.
Why Layer 1 Matters for DeFi
The Layer 1 a token launches on determines its gas costs, transaction speed, available DEX infrastructure, and potential user base. Ethereum offers the deepest liquidity and largest developer ecosystem but charges $1 to $20 per transaction. Solana offers sub-cent fees and fast finality but has experienced periodic network outages.
For token projects, choosing the right L1 is a foundational decision that affects everything from launch cost to trading volume potential. Many projects now deploy across multiple L1s and Layer 2s to maximize reach.
Related Terms
Layer 2 (L2)
A scaling solution built on top of a Layer 1 blockchain to increase throughput and reduce costs while inheriting base layer security.
Read definition Blockchain & Crypto FundamentalsConsensus Mechanism
The method by which a blockchain network agrees on the valid state of the ledger, such as PoW, PoS, or DPoS.
Read definition Blockchain & Crypto FundamentalsEVM (Ethereum Virtual Machine)
The computation environment that executes smart contracts on Ethereum and EVM-compatible chains like Base, Arbitrum, and BNB Chain.
Read definition Blockchain & Crypto FundamentalsGas
The unit measuring the computational effort required to execute operations on EVM chains; gas fees are gas used × gas price.
Read definition Blockchain & Crypto FundamentalsValidator
A node on a PoS blockchain that stakes tokens and participates in block production and consensus.
Read definitionFrequently Asked Questions
Common questions about Layer 1 (L1) in cryptocurrency and DeFi.
Layer 1 is the base blockchain that handles its own security and consensus. Layer 2 is a secondary network built on top of a Layer 1 that processes transactions off-chain and posts compressed proofs or data back to the L1 for final settlement. Layer 2s inherit the security of their parent L1.
Solana consistently offers the lowest transaction fees among major L1s, typically under $0.01 per transaction. BNB Chain averages $0.05 to $0.20. Ethereum is the most expensive, with fees ranging from $1 to $20 depending on network congestion.
Yes. Projects can deploy separate token contracts on different L1 chains and use bridges to enable transfers between them. This multi-chain approach increases the token's addressable market but requires managing liquidity and contract security across each deployment.
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