# RewardMath

Allows computing rewards given some parameters of stakes and incentives

### Functions[​](https://docs.uniswap.org/contracts/v3/reference/periphery/staker/libraries/RewardMath#functions) <a href="#functions" id="functions"></a>

#### computeRewardAmount[​](https://docs.uniswap.org/contracts/v3/reference/periphery/staker/libraries/RewardMath#computerewardamount) <a href="#computerewardamount" id="computerewardamount"></a>

```solidity
  function computeRewardAmount(
    uint256 totalRewardUnclaimed,
    uint160 totalSecondsClaimedX128,
    uint256 startTime,
    uint256 endTime,
    uint128 liquidity,
    uint160 secondsPerLiquidityInsideInitialX128,
    uint160 secondsPerLiquidityInsideX128,
    uint256 currentTime
  ) internal pure returns (uint256 reward, uint160 secondsInsideX128)
```

Compute the amount of rewards owed given parameters of the incentive and stake

**Parameters:**[**​**](https://docs.uniswap.org/contracts/v3/reference/periphery/staker/libraries/RewardMath#parameters)

| Name                                   | Type    | Description                                                                                           |
| -------------------------------------- | ------- | ----------------------------------------------------------------------------------------------------- |
| `totalRewardUnclaimed`                 | uint256 | The total amount of unclaimed rewards left for an incentive                                           |
| `totalSecondsClaimedX128`              | uint160 | How many full liquidity-seconds have been already claimed for the incentive                           |
| `startTime`                            | uint256 | When the incentive rewards began in epoch seconds                                                     |
| `endTime`                              | uint256 | When rewards are no longer being dripped out in epoch seconds                                         |
| `liquidity`                            | uint128 | The amount of liquidity, assumed to be constant over the period over which the snapshots are measured |
| `secondsPerLiquidityInsideInitialX128` | uint160 | The seconds per liquidity of the liquidity tick range as of the beginning of the period               |
| `secondsPerLiquidityInsideX128`        | uint160 | The seconds per liquidity of the liquidity tick range as of the current block timestamp               |
| `currentTime`                          | uint256 | The current block timestamp, which must be greater than or equal to the start time                    |

**Return Values:**[**​**](https://docs.uniswap.org/contracts/v3/reference/periphery/staker/libraries/RewardMath#return-values)

| Name                | Type    | Description                                                                           |
| ------------------- | ------- | ------------------------------------------------------------------------------------- |
| `reward`            | uint256 | The amount of rewards owed                                                            |
| `secondsInsideX128` | uint160 | The total liquidity seconds inside the position's range for the duration of the stake |