# The Nexus Layer | The Cross-Chain Nervous System Nexus modules are decentralized nodes that operate as Light Clients. They bridge the gap between Solana and the outside world. * **Function:** They monitor Vault Contracts on external chains like Ethereum and Polygon. When a user deposits assets there, Nexus Nodes verify the transaction and instruct the Solana Core to mint the corresponding collateral. * **Decentralized Bridging:** Unlike centralized bridges, Nexus relies on a rotating set of reputation-based nodes to sign cross-chain messages. * **Extensibility:** New chains such as Arbitrum and Base can be added by deploying new Nexus sub-modules via DAO vote. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.spectratoken.xyz/2.-architecture/the-nexus-layer-or-the-cross-chain-nervous-system.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.