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

# LST Integration for PoL Auction Yield

> Register an LSTStakerVault so your LST product earns a pro-rata share of WBERA paid through the PoL Incentive Auction.

Liquid Staking Token (LST) issuers can plug their staked-LST product into the Berachain Proof of Liquidity (PoL) Incentive Auction. Once an `LSTStakerVault` and its adapter are registered on `BGTIncentiveFeeCollector`, the vault automatically receives a pro-rata share of every WBERA payment auction buyers make against redirected Reward Vault incentive tokens.

This page is the integrator-facing guide. For the auction mechanics from the protocol side, see [Incentive Marketplace — Incentive fee settlement](/general/proof-of-liquidity/incentives#incentive-fee-settlement).

## What registration enables

When a buyer settles redirected incentive tokens through `BGTIncentiveFeeCollector`, the WBERA they pay is split **pro-rata, by WBERA-denominated total assets**, across:

* The shared `WBERAStakerVault` (sWBERA stakers).
* Every registered `LSTStakerVault` whose LST has an adapter that converts WBERA into the underlying LST.

A registered LST vault therefore accrues two sources of return for its stakers: the LST's own underlying yield, plus a continuous share of PoL incentive-auction WBERA proportional to its total stake value.

Stakers of a registered LST do not need to interact with PoL directly. As long as the vault and adapter are registered, the WBERA flows in automatically on every auction settlement.

## How auction yield reaches an LST vault

1. Reward Vaults transfer redirected incentive tokens (incentives not paid as validator commission) into `BGTIncentiveFeeCollector`.
2. An auction buyer calls `claimFees(recipient, feeTokens)` and pays WBERA into the collector.
3. The collector splits the paid WBERA pro-rata across the sWBERA Staking Vault and registered `LSTStakerVault`s, sized by each vault's WBERA-denominated total assets.
4. For each registered LST vault, the collector calls the vault's registered **adapter** to convert that WBERA share into the vault's underlying LST, then credits the LST to the vault through `receiveRewards`.
5. The vault's per-share value rises; its stakers earn the increment without taking any action.

The split is recomputed on every settlement, so vaults that grow attract a larger share of subsequent WBERA flows.

## Currently registered LSTs

The first registered LST is **iBERA** from Infrared. Its staked version, **siBERA**, accrues both the underlying iBERA yield and its pro-rata share of PoL incentive-auction WBERA via the registered LST adapter.

Additional LSTs can be registered through the steps below.

## Integration steps for LST issuers

The integration is two contract deployments and one registry write. Coordinate with governance for the registry call.

### 1. Deploy your LST vault system

Deploy the `LSTStakerVault` system via [`LSTStakerVaultFactory`](/build/getting-started/deployed-contracts). The factory produces:

* An `LSTStakerVault` ERC-4626-style vault that accepts your LST as the asset.
* The supporting contracts for withdrawal accounting and reward receipt.

The vault must implement `receiveRewards` so that the collector can credit converted LST balances during auction settlement.

### 2. Deploy an LST adapter

The adapter is the contract that converts WBERA into your underlying LST during auction settlement. It must:

* Accept WBERA from `BGTIncentiveFeeCollector`.
* Convert that WBERA into the LST (through your protocol's mint, swap, or wrap path).
* Hand the resulting LST to the registered `LSTStakerVault` via `receiveRewards`.

Adapter design is LST-specific. Refer to the iBERA adapter for a working pattern.

### 3. Register the vault and adapter with governance

Submit a governance proposal to call `addLstStakerVault` on `BGTIncentiveFeeCollector`, supplying:

* The deployed `LSTStakerVault` address.
* The deployed adapter address.

Once the registry write lands, the collector includes the new vault in every subsequent pro-rata split. The vault begins accruing WBERA-sourced LST yield on the next auction settlement.

See [Deployed contract addresses](/build/getting-started/deployed-contracts) for the live `BGTIncentiveFeeCollector` and `LSTStakerVaultFactory` addresses on each network.

## Operational notes

* **Vault total assets must be denominated comparably to WBERA.** The collector sizes each vault's share by its WBERA-denominated total assets; an adapter that misreports the underlying value will distort the split for every other registered vault.
* **No staking-pool LSTs.** Staking pool shares (stBERA) are not LSTs and cannot be registered through this path; they have their own yield mechanics. See [Staking Pools Overview](/nodes/staking-pools/overview).

## See also

* [Incentive Marketplace — Incentive fee settlement](/general/proof-of-liquidity/incentives#incentive-fee-settlement) — the auction mechanics from the protocol side.
* [\$sWBERA Token](/general/tokens/swbera) — the sister product that shares the pro-rata WBERA split.
* [Deployed contract addresses](/build/getting-started/deployed-contracts) — current `BGTIncentiveFeeCollector` and `LSTStakerVaultFactory` addresses.
* [Proof of Liquidity Overview](/general/proof-of-liquidity/overview) — the broader PoL picture.