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

# Nabla

> Single-sided AMM liquidity provision with insurance backstop

<Info>
  **TVL:** \~\$3M | **Type:** Single-Sided AMM | **Docs:** [docs.nabla.fi](https://docs.nabla.fi)
</Info>

## Overview

Nabla is a single-sided AMM where liquidity providers deposit a single asset and earn yield from swap fees. A shared backstop pool provides insurance against impermanent loss. Unlike traditional two-sided AMMs, there is no need to provide paired assets when depositing.

## Functions

### getNablaPools()

Returns all active Nabla liquidity pools with current APY and total liquidity.

**Returns** `NablaPool[]`

| Field            | Type      | Description                          |
| ---------------- | --------- | ------------------------------------ |
| `address`        | `string`  | Pool contract address                |
| `asset`          | `string`  | Single asset deposited into the pool |
| `totalLiquidity` | `bigint`  | Total liquidity in the pool (raw)    |
| `apy`            | `number`  | Current APY from fees as a decimal   |
| `protocol`       | `'nabla'` | Protocol identifier                  |

```typescript theme={null}
const pools = await sdk.getNablaPools()
// → [
//   { address: '0x...', asset: '0x...', totalLiquidity: 1800000n, apy: 0.072, protocol: 'nabla' },
//   { address: '0x...', asset: '0x...', totalLiquidity: 950000n,  apy: 0.051, protocol: 'nabla' },
// ]
```

### getNablaTVL()

Returns total value locked across all Nabla pools and the backstop pool in USD.

**Returns** `number`

```typescript theme={null}
const tvl = await sdk.getNablaTVL()
// → 3000000
```

## Usage Example

```typescript theme={null}
import { Rampart } from 'rampart-monad'

const sdk = new Rampart()

const pools = await sdk.getNablaPools()
const tvl = await sdk.getNablaTVL()

console.log(`Nabla TVL: $${(tvl / 1e6).toFixed(1)}M across ${pools.length} pools`)

const best = pools.sort((a, b) => b.apy - a.apy)[0]
console.log(`Best pool APY: ${(best.apy * 100).toFixed(2)}% for asset ${best.asset}`)
```

## Contract Addresses

| Contract     | Address                                      |
| ------------ | -------------------------------------------- |
| Router       | `0x610748f49774C062467c7AE1eC9E4729FFE94577` |
| BackstopPool | `0x11B06EF8Adc5ea73841023CB39Be614f471213cc` |