
A blockchain ecosystem can be organized using a layered architecture, much like Internet protocols. The base layer serves as the foundational infrastructure that supports the development of multiple upper-level blockchains. This layer is essential, providing the technical groundwork needed for other layers to operate efficiently.
Blockchain’s hierarchical structure is typically arranged as follows: the base layer provides the core infrastructure; Layer 1 includes the foundational blockchains developers use to build decentralized applications (DApps); Layer 2 offers scaling solutions that handle activities beyond the upper-level blockchains; and Layer 3 is the application layer, featuring games, wallets, and other DApps. However, not all blockchain ecosystems fit neatly into these categories. Some may skip certain layers or be classified differently depending on their specific context.
Base layer protocols help resolve challenges that upper-level networks built on monolithic architectures, like Ethereum, often face. By creating more flexible foundational infrastructure and empowering developers to launch purpose-built blockchains, the base layer aims to address core issues such as scalability and interoperability more effectively.
Interoperability means blockchain networks can communicate smoothly and effectively with one another. This capability builds a tightly integrated network of blockchain-powered products and services, resulting in a better user experience and expanded integration opportunities.
Blockchains built on the same base layer protocol can interact natively, eliminating the need for complex dedicated bridges. By leveraging various iterations of cross-chain transfer protocols, the base layer enables blockchains within an ecosystem to utilize each other's features and use cases, creating operational synergy. This interconnection commonly leads to faster transactions and improved efficiency across the network.
A monolithic blockchain—like Ethereum—often experiences congestion because a single upper-level protocol provides all essential functions, including transaction execution, consensus, and data availability. This concentration creates a scaling bottleneck. The base layer overcomes this by delegating critical functions to specialized blockchains.
This distributed design allows blockchain networks built on the same base infrastructure to optimize specific tasks, enhancing the system’s overall scalability. Execution chains, for example, can be tailored to process high volumes of transactions per second, while other chains focus on consensus or data availability.
To attract developers, base layer protocols typically offer intuitive software development kits (SDKs) and seamless interfaces, making it fast and efficient to launch purpose-driven blockchains.
Base layer protocols give developers extensive flexibility to customize their blockchains to meet specific needs. This includes defining token issuance models, setting custom consensus parameters, and determining the types of DApps to build. Such design freedom is vital for driving innovation and accelerating adoption of new blockchain solutions.
Base layer protocols operate in different ways, each with unique design, features, and technical approaches. Generally, they function as the primary blockchain supporting transaction data for various upper-level chains. While groups of upper-level chains may be built on a base layer protocol, cross-chain transfer protocols also exist to securely move tokens and data between different blockchains.
The architecture and relationships among these three components can vary widely between base layer protocols. Below are leading examples of how various projects implement this concept.
Ethereum co-founder Gavin Wood created Polkadot to enable developers to build independent blockchains. The protocol features a main chain, the Polkadot Relay Chain, which serves as the ecosystem’s core. Each independent blockchain built on Polkadot is called a parachain.
The Relay Chain acts as a bridge among parachains, enabling efficient, coordinated data communication. It utilizes sharding—an innovative method for dividing blockchains or databases—to make transaction processing more efficient and scalable. Polkadot relies on proof-of-stake (PoS) validation to robustly secure network consensus. Projects seeking to use Polkadot compete in auctions for parachain slots, demonstrating the model’s viability.
Developed by Ava Labs with a focus on decentralized finance protocols, Avalanche uses a unique triple-chain infrastructure comprising three core chains: the contract chain (C-Chain), the exchange chain (X-Chain), and the platform chain (P-Chain).
Each of these chains is configured to handle critical functions in the ecosystem, aiming for high security, low latency, and robust performance. The X-Chain facilitates efficient asset creation and exchange, the C-Chain supports smart contract creation and execution, and the P-Chain coordinates validators and subnet management. Avalanche’s flexible architecture enables fast, cost-effective cross-chain exchanges, promoting asset mobility across the ecosystem.
Founded by Ethan Buchman and Jae Kwon, the Cosmos network consists of a main proof-of-stake blockchain called Cosmos Hub and customizable blockchains known as Zones. Cosmos Hub transfers assets and data among connected Zones and provides shared security for the entire network.
Each Zone can be extensively customized, allowing developers to design their own cryptocurrency, set unique block validation rules, and introduce other specialized features. All Cosmos applications and services in these Zones interact through the Inter-Blockchain Communication (IBC) protocol—a standard that enables free exchange of assets and data between independent blockchains, supporting true interoperability.
Depending on their design, base layer blockchains have the potential to tackle some of the industry’s biggest challenges, including interoperability and scalability. However, the practical success of base layer blockchain adoption remains to be seen. Numerous competing solutions aim for similar goals, creating a fast-evolving landscape.
The ultimate role of base layer blockchains in solving industry challenges depends on their ability to attract talented developers and whether the applications built on these protocols deliver genuine, tangible value for end users. Continuous competition and innovation in this sector will drive further improvements.
"To infinity and beyond" expresses a limitless, unconditional commitment. In the crypto world, it represents the vision for boundless growth and ongoing expansion of the blockchain ecosystem into a future without limits.











