Layer-1 blockchains

What is layer 1 blockchain?

One Layer-1 blockchain is the main and base layer of a blockchain network. It processes transactions directly on its own blockchain and does not require an additional layer for scaling or processing. Layer 1 blockchains are the basis of many decentralized applications (dApps) and cryptocurrencies, as they offer a secure and independent infrastructure.

What is layer 1 blockchain?

Examples of well-known layer 1 blockchains are Bitcoin, Ethereum, Solana and Avalanche. These networks have their own consensus mechanisms and secure themselves without the support of external solutions.

Features and functions of layer-1 blockchains

1. independent consensus protocol

Layer-1 blockchains use their own Consensus mechanisms for the validation of transactions. These determine how new blocks are added to the blockchain. Examples:

• Bitcoin → Proof of Work (PoW) - High security, but limited scalability.
• Ethereum (since The Merge) → Proof of Stake (PoS) - More energy-efficient than PoW, enables faster transactions.
• Solana → Proof of History (PoH) - Timestamp-based mechanism for high speed.

These mechanisms ensure security and decentralization, but also influence the scalability of the network.

2. processing and storage of transactions

Layer-1 blockchains manage their own ledger and are responsible for the Direct validation of transactions without having to rely on a second layer. They have to process a large number of transactions efficiently, which often leads to scaling problems.

3. support for smart contracts

Not all layer-1 blockchains support Smart contracts. While Bitcoin is focused on security and payment transactions, Ethereum, Solana and Avalanche enable programmable contracts, which are essential for dApps and DeFi projects.

Known layer-1 blockchains

Here are some of the best-known Layer 1 networks with their special features:

Blockchain	Consensus mechanism	Main features
Bitcoin	Proof of Work (PoW)	Safe, decentralizedbut slowly
Ethereum	Proof of Stake (PoS)	Supported Smart contracts, high activity
Solana	Proof of History (PoH)	High speed, low fees
Avalanche	PoS + DAG	Scalable, very fast confirmations
Aptos	PoS (Move-VM)	Focus on scalability & security

🔗 More about KYC and regulatory requirements for layer-1 blockchains.

Challenges of layer-1 blockchains

Layer-1 blockchains are facing a Blockchain-trilemma of security, decentralization and scalability. This means

• High security can make scalability difficult (e.g. Bitcoin is safe but slow).
• High scalability can lead to less decentralization (e.g. Solana is fast, but less decentralized).
• Maximum decentralization can reduce the efficiency of the network.

Solutions for scaling problems

There are various approaches to solving the trilemma:

1. sharding

Using blockchains such as Ethereum and NEAR Shardingto distribute transaction loads across several small database sections (shards). This significantly increases scalability, as each shard processes transactions in parallel.

2. layer-2 solutions

Layer-2 technologies such as the Lightning Network (Bitcoin) or ZK rollups (Ethereum) enable transactions outside the main blockchain and thus relieve layer-1 networks.

3. optimized consensus mechanisms

New consensus mechanisms such as Delegated Proof of Stake (DPoS) or Hybrid consensus systems combine efficiency with security and reduce energy consumption and transaction fees.

4. interoperability between blockchains

As many blockchains exist, some layer-1 projects are working on a Interoperabilityto enable seamless transactions between different networks. Examples of this are Polkadot and Cosmosthat work with "bridges" between blockchains.

Conclusion

Layer-1 blockchains are the Foundation of the crypto industry. They offer security, decentralization and, in some cases, smart contract functionality. Challenges such as Scalability are increasingly being improved by new technologies such as sharding, layer-2 solutions and optimized consensus mechanisms.

In the future, advances in zero-knowledge proofs, cross-chain communication and AI-supported network customization could make layer-1 blockchains even more powerful.