Definition
A modular blockchain is a blockchain architecture concept in which core functions such as execution, settlement, consensus, and data availability are separated into distinct, specialized layers or networks. Instead of a single monolithic chain handling all responsibilities, a modular design allocates these roles to interoperable components, enabling independent evolution, specialization, and configuration of each functional layer within a broader blockchain ecosystem.
In Simple Terms
A modular blockchain is a way of organizing blockchains so that different parts of the system focus on different jobs. One part might handle running transactions, another might record and finalize them, and another might store the data. These parts work together but are designed and operated as separate, specialized pieces.
Context and Usage
The term modular blockchain is commonly used in discussions about next-generation blockchain scalability, interoperability, and network design. It appears in technical research, protocol architecture debates, and ecosystem roadmaps that distinguish between execution environments, settlement systems, and data availability layers. The concept is frequently referenced when describing ecosystems that rely on multiple coordinated layers rather than a single, vertically integrated blockchain.