> For the complete documentation index, see [llms.txt](https://docs.stake.link/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.stake.link/lst-rewards-splitter-contracts/lstrewardssplitter.md).

# LST Rewards Splitter

The `LSTRewardsSplitter` enables an account to deposit LSTs and split any earned rewards between itself and other addresses.

## View Functions

### controller

Returns the address of the controller contract

```solidity
function controller() external view returns (address)
```

#### Return Values

| Name       | Type    | Description                             |
| ---------- | ------- | --------------------------------------- |
| controller | address | address of LSTRewardsSplitterController |

### lst

Returns the address of the liquid staking token handled by this contract

```solidity
function lst() external view returns (address)
```

#### Return Values

| Name | Type    | Description    |
| ---- | ------- | -------------- |
| lst  | address | address of LST |

### principalDeposits

Returns the total number of tokens deposited without rewards

```solidity
function stakingPool() external view returns (uint256)
```

#### Return Values

| Name              | Type    | Description              |
| ----------------- | ------- | ------------------------ |
| principalDeposits | uint256 | total principal deposits |

### checkUpkeep

Returns whether a call should be made to performUpkeep to split new rewards

```solidity
function checkUpkeep(bytes) external view returns (bool, bytes)
```

#### Return Values

| Name         | Type  | Description                                             |
| ------------ | ----- | ------------------------------------------------------- |
| upkeepNeeded | bool  | true if performUpkeep should be called, false otherwise |
|              | bytes |                                                         |

### getFees

Returns a list of all fees

```solidity
function getFees() external view returns (struct LSTRewardsSplitter.Fee[])
```

#### Return Values

| Name | Type                             | Description  |
| ---- | -------------------------------- | ------------ |
| fees | struct LSTRewardsSplitter.Fee\[] | list of fees |

## Write Functions

### deposit

Deposits tokens

```solidity
function deposit(uint256 _amount) external
```

#### Parameters

| Name     | Type    | Description       |
| -------- | ------- | ----------------- |
| \_amount | uint256 | amount to deposit |

### withdraw

Withdraws tokens

```solidity
function withdraw(uint256 _amount, address _receiver) external
```

#### Parameters

| Name       | Type    | Description               |
| ---------- | ------- | ------------------------- |
| \_amount   | uint256 | amount to withdraw        |
| \_receiver | address | address to receive tokens |

### performUpkeep

Splits new rewards between fee receivers

```solidity
function performUpkeep(bytes) external
```

### splitRewards

Splits new rewards between fee receivers

*Bypasses rewardThreshold*

```solidity
function splitRewards() external
```

### addFee

Adds a new fee

```solidity
function addFee(address _receiver, uint256 _feeBasisPoints) external
```

#### Parameters

| Name             | Type    | Description         |
| ---------------- | ------- | ------------------- |
| \_receiver       | address | receiver of fee     |
| \_feeBasisPoints | uint256 | fee in basis points |

### updateFee

Updates an existing fee

```solidity
function updateFee(uint256 _index, address _receiver, uint256 _feeBasisPoints) external
```

#### Parameters

| Name             | Type    | Description         |
| ---------------- | ------- | ------------------- |
| \_index          | uint256 | index of fee        |
| \_receiver       | address | receiver of fee     |
| \_feeBasisPoints | uint256 | fee in basis points |


---

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