# vPoolManager

## Read-only functions

### function getVirtualPool

```solidity
function getVirtualPool(
     address jkPair,
     address ikPair
) public view override returns (VirtualPoolModel memory vPool)
```

Returns a Virtual Pool constructed from a given Active Pool and a given Reference Pool. If a Virtual Pool pool cannot be constructed from the given pair of pools, an error occurs.

See [How Virtual Pools Work](/virtuswap-documentation/virtuswap-basics/virtuswap-technology/how-virtual-pools-work.md) for details on how Virtual Pools are constructed.

Parameters:

<table><thead><tr><th width="293">Name</th><th width="181">Type</th><th>Description</th></tr></thead><tbody><tr><td>jkPair</td><td><code>address</code></td><td>Address of the Active Pool</td></tr><tr><td>ikPair</td><td><code>address</code></td><td>Address of the Reference Pool</td></tr></tbody></table>

### function getVirtualPools

```solidity
function getVirtualPools(
    address token0,
    address token1
) external view override returns (VirtualPoolModel[] memory vPools)
```

Returns all Virtual Pools that are available between two given tokens.&#x20;

See [How Virtual Pools Work](/virtuswap-documentation/virtuswap-basics/virtuswap-technology/how-virtual-pools-work.md) for details on how Virtual Pools are constructed.

Parameters:

<table><thead><tr><th width="293">Name</th><th width="181">Type</th><th>Description</th></tr></thead><tbody><tr><td>token0</td><td><code>address</code></td><td>First token</td></tr><tr><td>token1</td><td><code>address</code></td><td>Second token</td></tr></tbody></table>

#### function pairFactory

```solidity
function pairFactory() 
    external view 
returns (address);
```

Returns the [`vPairFactory`](/virtuswap-documentation/technical-reference/smart-contracts-v1/dex-contracts/vpairfactory.md) instance.

## State-changing functions

### function updateVirtualPoolBalances

```solidity
function updateVirtualPoolBalances(
        VirtualPoolModel memory vPool,
        uint256 balance0,
        uint256 balance1
    ) external overrides)
```

Updates balances of a Virtual Pool. This function is called by `swapNativeToReserve` and `swapReserveToNative` methods of the [`vPair`](/virtuswap-documentation/technical-reference/smart-contracts-v1/dex-contracts/vpair.md) contract after a trade is executed using the Virtual Pool. The goal is to make Virtual Pool behave exactly like a regular AMM pool would, i.e. that every trade immediately effects the liquidity of the pool.

Parameters:

<table><thead><tr><th width="170">Name</th><th width="213">Type</th><th>Description</th></tr></thead><tbody><tr><td>vPool</td><td><code>VirtualPoolModel</code></td><td>The Virtual Pool to be updated</td></tr><tr><td>balance0</td><td><code>uint256</code></td><td>Balance of asset0 in the Virtual Pool</td></tr><tr><td>balance1 </td><td><code>uint256</code></td><td>Balance of asset1 in the Virtual Pool</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.virtuswap.io/virtuswap-documentation/technical-reference/smart-contracts-v1/dex-contracts/vpoolmanager.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.