What is Network Design?
Network design in blockchain contexts describes the process of planning and building a blockchain infrastructure. It answers the question of how you arrange a specific infrastructure to run some logic on top of it.
The blockchain stack encompasses five layers:
- Hardware layer: Physical infrastructure supporting nodes (archive, full, and light nodes)
- Data layer: Manages data creation, encryption, and storage; handles digital signatures and hashing
- Network layer: Defines how nodes discover and communicate with each other
- Consensus layer: Establishes agreement mechanisms (Proof-of-Work or Proof-of-Stake variants)
- App Layer: User-facing interface where smart contracts operate
Beyond technical considerations, successful networks must account for human participation and establish incentive structures supporting long-term growth.
The Blockchain Trilemma
The blockchain trilemma posits that networks can only optimize two of three properties: decentralization, security, and scalability. All current solutions involve trade-offs:
- Solana: Achieves scalability and speed but requires significant hardware, potentially limiting participation
- Rollups: Operate with centralized sequencers, creating censorship and MEV extraction risks
- Farcaster: Prioritizes scalability and usability over complete decentralization
Modular blockchains attempt addressing this by decoupling core functions and optimizing each layer independently.
Interoperability & Composability
Networks designed for interoperability with existing ecosystems have better survival prospects. The modularity trend introduces complexity and fragmentation, yet most acknowledge interoperable, composable networks represent the future.
Zero-knowledge cryptography shows promise for cross-chain communication, though such projects remain largely in research phases.
Conclusion
Before launching a blockchain, developers should carefully evaluate whether their use case genuinely requires a dedicated chain or could function as a decentralized application instead.