# Fast Finality Layer for Soneium Fast Finality Layer for [Soneium](https://soneium.org/) is an Autonomous Verifiable Service (AVS) built by AltLayer and powered by EigenLayer’s restaking framework in collaboration with [Astar Network](https://astar.network/). It delivers sub-10 second finality for transactions on Soneium — an OP Stack-based L2 — by enabling decentralized validation of rollup state transitions. Backed by restaked ETH and ASTR on EigenLayer, this fast finality layer offers high-throughput apps near real-time confirmation, enhanced crypto-economic security, and seamless integration with Soneium's developer stack. Soneium, an Ethereum layer-2 developed by Sony Block Solutions Labs, is a versatile general-purpose blockchain platform that aims to evoke emotion, empower creativity, and realize the open internet that transcends boundaries. --- # 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.altlayer.io/altlayer-documentation/altlayer-facilitated-actively-validated-services/fast-finality-layer-for-soneium.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.