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

# Architecture

#### Overview

This vault type is designed to allow users to delegate stake without direct liquidity transfers across various Layer 2 (source chain) networks to Layer 1 (target chain) with a following steps happening under the hood:

1. A user on an L2 deposits an asset into the vault.
2. The user receives a corresponding receipt token on L2.
3. The deposited liquidity is locked in the vault on L2.
4. An OFT ( LayerZero Omnichain Fungible Token Standard) counterpart is minted on the target chain — Ethereum mainnet, where Mellow restaking vaults are deployed.
5. That OFT is then used as the restaking asset within Symbiotic/EigenLayer vaults to provide shared security. Symbiotic has already whitelisted the OFT to have the same rewards rate as native L1 assets.
6. The user earns rewards in two ways: first, through L2 incentives—some of the vault’s accumulated liquidity is staked directly, and some is used in DeFi strategies on the L2 via the receipt tokens; second, through direct restaking rewards (both tokens and points) from various networks.

If a slashing event occurs, the OFT itself can be slashed. Any non-burned OFT can still be redeemed to unlock the original L2 liquidity.

Visually, the system is divided into:

* **Source Chain (L2):** Users deposit their assets and receive vault shares on L2.
* **Target Chain (L1):** Stake delegation occurs here after cross-chain transfer. The delegated stake is distributed among various yield protocols supported by Mellow MultiVault.

LayerZero's OFT is used for cross-chain interaction with one key modification: deposits into the `OFTAdapter` can only be made via `SourceCore`.

Gas parameters are defined using enforced options in the OFTs.

<Frame>
  <img src="https://mintlify.s3.us-west-1.amazonaws.com/mellow/images/image%20%287%29.png" alt="" />
</Frame>