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

# Compute Fee Inside for Range

> Calculate fee growth inside a specific tick range

The `MarketThree.computeFeeInsideForRange()` static method computes the fee growth that has occurred inside a specified tick range. This is essential for calculating fees earned by liquidity positions.

## Usage

```typescript theme={null}
import { MarketThree } from "@exponent-labs/exponent-sdk";

// Compute fee growth inside a tick range
const { insideSy, insidePt } = MarketThree.computeFeeInsideForRange({
  currentTickPrice: market.state.financials.currentSpotPrice,
  lowerTickPrice: 1.05,  // Lower bound: 5% APY
  upperTickPrice: 1.10,   // Upper bound: 10% APY
  feeGrowthIndexGlobalPt: market.state.financials.feeGrowthIndexGlobalPt,
  feeGrowthIndexGlobalSy: market.state.financials.feeGrowthIndexGlobalSy,
  lowerTickOutsidePt: lowerTick.feeGrowthOutsidePt,
  lowerTickOutsideSy: lowerTick.feeGrowthOutsideSy,
  upperTickOutsidePt: upperTick.feeGrowthOutsidePt,
  upperTickOutsideSy: upperTick.feeGrowthOutsideSy,
});

console.log("SY fee growth inside range:", insideSy);
console.log("PT fee growth inside range:", insidePt);
```

## Parameters

| Parameter                | Type     | Required | Description                                                 |
| ------------------------ | -------- | -------- | ----------------------------------------------------------- |
| `currentTickPrice`       | `number` | Yes      | Current market price in format of 1 + percentage / 100      |
| `lowerTickPrice`         | `number` | Yes      | Lower tick boundary price in format of 1 + percentage / 100 |
| `upperTickPrice`         | `number` | Yes      | Upper tick boundary price in format of 1 + percentage / 100 |
| `feeGrowthIndexGlobalPt` | `bigint` | Yes      | Global PT fee growth index                                  |
| `feeGrowthIndexGlobalSy` | `bigint` | Yes      | Global SY fee growth index                                  |
| `lowerTickOutsidePt`     | `bigint` | Yes      | PT fee growth outside the lower tick                        |
| `lowerTickOutsideSy`     | `bigint` | Yes      | SY fee growth outside the lower tick                        |
| `upperTickOutsidePt`     | `bigint` | Yes      | PT fee growth outside the upper tick                        |
| `upperTickOutsideSy`     | `bigint` | Yes      | SY fee growth outside the upper tick                        |

## Returns

Returns an object with:

```typescript theme={null}
{
  insideSy: bigint;
  insidePt: bigint;
}
```

| Property   | Type     | Description                                       |
| ---------- | -------- | ------------------------------------------------- |
| `insideSy` | `bigint` | SY fee growth that occurred inside the tick range |
| `insidePt` | `bigint` | PT fee growth that occurred inside the tick range |

## Calculation Logic

The method implements the Uniswap V3 formula for computing fee growth inside a range:

* **If current price \< lower price**: `inside = outside(lower) - outside(upper)`
* **If current price >= upper price**: `inside = outside(upper) - outside(lower)`
* **If current price is inside range**: `inside = global - outside(lower) - outside(upper)`

This allows tracking of fees earned specifically within the position's active range.