> ## 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.

# Liquidity Unit Price in Asset

> Calculate the price per unit of liquidity in underlying asset terms

The `liquidityUnitPriceInAsset()` method calculates the price per unit of liquidity in underlying asset terms, considering only the principal value (excluding fees) for a specific tick range.

## Usage

```typescript theme={null}
import { MarketThree, LOCAL_ENV } from "@exponent-labs/exponent-sdk";
import { Connection } from "@solana/web3.js";

const connection = new Connection("https://api.mainnet-beta.solana.com");
const market = await MarketThree.load(LOCAL_ENV, connection, marketAddress);

// Calculate liquidity unit price for a tick range
const lowerTickKey = 50000;  // 5% APY (scaled by 10^6)
const upperTickKey = 100000; // 10% APY (scaled by 10^6)

const pricePerUnit = market.liquidityUnitPriceInAsset({
  lowerTickKey,
  upperTickKey,
});

console.log("Price per unit of liquidity:", pricePerUnit);

// Optional: use custom ticks or SY exchange rate
const customPrice = market.liquidityUnitPriceInAsset({
  lowerTickKey,
  upperTickKey,
  ticksOverride: customTicksAccount,
  syExchangeRateOverride: 1.05,
});
```

## Parameters

| Parameter                | Type     | Required | Description                                                  |
| ------------------------ | -------- | -------- | ------------------------------------------------------------ |
| `lowerTickKey`           | `number` | Yes      | Inclusive tick key for the left boundary (scaled by 10^6)    |
| `upperTickKey`           | `number` | Yes      | Exclusive tick key for the right boundary (scaled by 10^6)   |
| `ticksOverride`          | `Ticks`  | No       | Optional ticks account data (defaults to the instance state) |
| `syExchangeRateOverride` | `number` | No       | Optional SY exchange rate (defaults to current flavor rate)  |

## Returns

Returns a `number` representing the price per unit of liquidity in underlying asset terms (principal only).

Returns `0` if:

* No ticks exist in the specified range
* Total share supply is 0
* `lowerTickKey >= upperTickKey` (throws error)

## Calculation Details

The method:

1. Filters tick intervals within the specified range
2. Aggregates `principalPt`, `principalSy`, and `principalShareSupply` across intervals
3. Calculates PT asset value using time decay:
   ```
   ptAssetValuePerToken = exp(-timeFactor * currentSpotPrice)
   ```
4. Computes total principal value:
   ```
   principalValue = (principalPt * ptAssetValue) + (principalSy * syExchangeRate)
   ```
5. Returns price per unit:
   ```
   pricePerUnit = principalValue / totalShareSupply
   ```

This calculation excludes accrued fees and represents only the principal component of the liquidity position.