extendedchain

Extendedchain is a proposed modular architecture for extending the capabilities of blockchain systems without requiring a complete network fork. In this model, existing blockchains can host extension modules, or extmods, that implement additional functionality such as privacy features, data availability optimizations, or specialized execution environments. The goal of extendedchain is to enable rapid experimentation and feature deployment while preserving base-layer security guarantees.

The architecture typically comprises a base chain that provides finality and consensus, and one or more extension modules that run on top or alongside the base layer. An extension kernel coordinates interactions between the base chain and extmods, enforcing security boundaries and providing a standardized API for cross-module calls. Cross-chain state transfer and proof verification are supported through a common interoperability protocol, allowing assets and data to move between chains or layers with verifiable proofs.

Key features include modularity, upgradeability, and backward compatibility with existing ecosystems. Extmods can be developed independently and upgraded through governance processes, reducing the need for hard forks. The security model emphasizes isolation between modules, with the base chain ensuring core safety properties while extmods offer optional enhancements subject to audits and formal verification.

Adoption and standardization efforts focus on interoperable interfaces, verification formats for cross-chain messages, and governance mechanisms for module approval. Potential use cases span privacy-preserving smart contracts, scalable data storage, regulatory compliance tooling, and experimental consensus or execution environments.

See also: sidechains, layer-2 solutions, cross-chain communication protocols, modular blockchains.