> ## Documentation Index
> Fetch the complete documentation index at: https://docs.relay.link/llms.txt
> Use this file to discover all available pages before exploring further.

# Chain Abstraction

> Relay offers a suite of tools to help developers build chain-abstracted UX

## Best-In-Class Liquidity

Chain abstraction is like magic: in order to make all chains feel like one, you need a perfectly executed combination of low latency, low cost, high success and wide asset support. If you miss any of these, the “illusion” breaks. This is why Relay is maniacally focused on having the best possible liquidity. [60+ chains](https://docs.relay.link/resources/supported-chains). 5 VMs. DEX Aggregation. Solver inventory expansion. It’s what we are 100% focused on. Without it, chain abstraction isn’t possible.

## Transaction Execution

Relay is more than just bridging and swaps. We allow you to execute any call on any chain. Importantly, if the user has a smart wallet (or 7702-powered EOA), transactions can be executed with the user wallet as the msg.sender, allowing users to freely interact on any chain, as if they were using it directly. For best results, use a small wallet with [multi-chain signing](https://docs.zerodev.app/sdk/advanced/multi-chain-signing) like ZeroDev, so that users can do cross-chain actions with a single signature.

## Resources Locks

While not required, resource locks allow cross-chain fill time to reduce from seconds to truly instant. We already support Resource Locks from a number of providers like [OneBalance](https://www.onebalance.io/) and will expand to support more over time.