# LiquidityConversionRates
{% hint style="warning" %}
You are referring to the **`Legacy`** version of KyberSwap docs.
For the most updated information, please refer to:
* [**`Classic`**](https://github.com/KyberNetwork/kyberswap-documentation/blob/main/reference/legacy/api-abi/core-smart-contracts/broken-reference/README.md)
* [**`Elastic`**](https://docs.kyberswap.com/reference/legacy/kyberswap-elastic)
* [**`Limit Order`**](https://docs.kyberswap.com/kyberswap-solutions/limit-order)
* [**`Aggregator`**](https://docs.kyberswap.com/kyberswap-solutions/kyberswap-aggregator)
{% endhint %}
## contract LiquidityConversionRates
is [ConversionRatesInterface](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-conversionratesinterface.md), LiquidityFormula, [Withdrawable](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-withdrawable.md), Utils\ imports [ConversionRatesInterface](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-conversionratesinterface.md), LiquidityFormula, [Withdrawable](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-withdrawable.md), Utils
*Source*: [LiquidityConversionRates.sol](https://github.com/KyberNetwork/smart-contracts/blob/master/contracts/reserves/aprConversionRate/LiquidityConversionRates.sol)
The LiquidityConversionRates contract's role is to allow reserve operators to set liquidity parameters to the automated reserve for automated rate adjustment based on trades.
***
### INDEX[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#index)
\
### REFERENCE[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#reference)
#### Events[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#events)
#### `LiquidityParamsSet`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#liquidityparamsset)
Event for logging the setting of liquidity parameters.
***
event **LiquidityParamsSet**(uint rInFp, uint pMinInFp, uint numFpBits, uint maxCapBuyInFp, uint maxEthCapSellInFp, uint feeInBps, uint formulaPrecision, uint maxQtyInFp, uint maxBuyRateInPrecision, uint minBuyRateInPrecision, uint maxSellRateInPrecision, uint minSellRateInPrecision) | Parameter | Type | Description | | --------- |:----------------------:|:---------------------------:| | `uint` | rInFp | price move per 1 ETH inventory change in formula precision | | `uint` | pMinInFp | pMin boundary in formula precision | | `uint` | numFpBits | formula precision (currently 40 is recommended) | | `uint` | maxCapBuyInFp | allowed ETH quantity for a single buy trade in ETH | | `uint` | maxEthCapSellInFp | allowed ETH quantity for a single sell trade in ETH | | `uint` | feeInBps | fees in base points | | `uint` | formulaPrecision | formula precision | | `uint` | maxQtyInFp | max quantity in formula precision | | `uint` | maxBuyRateInPrecision | maximum buy rate in formula precision | | `uint` | minBuyRateInPrecision | minimum buy rate in formula precision | | `uint` | maxSellRateInPrecision | maximum sell rate in formula precision | | `uint` | minSellRateInPrecision | minimum sell rate in formula precision |\\
#### `ReserveAddressSet`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#reserveaddressset)
Event for logging the setting of the reserve contract address.
***
event **ReserveAddressSet**(address reserve) | Parameter | Type | Description | | --------- |:--------:|:---------------------------:| | `address` | reserve | reserve's contract address |\\
#### `CollectedFeesReset`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#collectedfeesreset)
Event for logging of the resetting of the fees collected.
***
event **CollectedFeesReset**(address reserve) | Parameter | Type | Description | | --------- |:----------------:|:---------------------------:| | `uint` | resetFeesInTwei | resetted fees in token wei |\\
#### Functions[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#functions)
#### `LiquidityConversionRates`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#liquidityconversionrates)
Contract constructor. Note that constructor methods are called exactly once during contract instantiation and cannot be called again.
***
function **LiquidityConversionRates**(address \_admin, ERC20 \_token) public | Parameter | Type | Description | | ---------- |:-------:|:----------------------------:| | `_admin` | address | admin's wallet address | | `_token` | ERC20 | ERC20 token contract address |
***
Web3 Example:
```
// DISCLAIMER: Code snippets in this guide are just examples and you
// should always do your own testing. If you have questions, visit our
// https://t.me/KyberDeveloper.
const fs = require('fs');
const solc = require('solc');
const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider('http://localhost:8545'));
const input = fs.readFileSync('LiquidityConversionRates.sol', 'utf8');
const output = await solc.compile(input, 1);
const bytecode = output.contracts['LiquidityConversionRates'].bytecode;
const abi = JSON.parse(output.contracts['LiquidityConversionRates'].interface);
const LiquidityConversionRates = new web3.eth.Contract(JSON.parse(abi));
const _admin = '';
const _token = '';
const deploy = LiquidityConversionRates.deploy({
data: `0x${bytecode}`,
arguments: [_admin, _token],
});
broadcastTx(deploy);
```
Code snippet reference: [broadcastTx()](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-web3.md#broadcasting-transactions)
\\
#### `getRate`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#getrate)
Gets the conversion rate of the token to swap.
***
function **getRate**(ERC20 conversionToken, uint currentBlockNumber, bool buy, uint qtyInSrcWei) public view returns(uint) | Parameter | Type | Description | | --------- |:------------------:|:------------------------------------------------------------------:| | `ERC20` | conversionToken | source ERC20 token contract address | | `uint` | currentBlockNumber | current block number | | `bool` | buy | `true` to get the buy rate, otherwise `false` to get the sell rate | | `uint` | qtyInSrcWei | quantity in wei for the source token | **Returns:**\ Conversion rate of the source token and reserve token
\\
#### `resetCollectedFees`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#resetcollectedfees)
Reset the amount of collected fees. Collected fees can be read through the state variable `collectedFeesInTwei`. Only admin can invoke.
***
function **resetCollectedFees**() public onlyAdmin Modifiers: [onlyAdmin](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-permissiongroups.md#onlyadmin)
\\
#### `setLiquidityParams`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#setliquidityparams)
Sets the liquidity parameters of the automated reserve. Only admin can invoke.
***
function **setLiquidityParams**(uint \_rInFp, uint \_pMinInFp, uint \_numFpBits, uint \_maxCapBuyInWei, uint \_maxCapSellInWei, uint \_feeInBps, uint \_maxTokenToEthRateInPrecision, uint \_minTokenToEthRateInPrecision) public onlyAdmin | Parameter | Type | Description | | --------- |:-----------------------------:|:---------------------------:| | `uint` | \_rInFp | price move per 1 ETH inventory change in formula precision | | `uint` | \_pMinInFp | pMin boundary in formula precision | | `uint` | \_numFpBits | formula precision (currently 40 is recommended) | | `uint` | \_maxCapBuyInWei | maximum token quantity in wei for a single buy trade | | `uint` | \_maxCapSellInWei | maximum token quantity in wei for a single sell trade | | `uint` | \_feeInBps | fees in base points | | `uint` | \_maxTokenToEthRateInPrecision | maximum allowed token to ETH rate in formula precision | | `uint` | \_minTokenToEthRateInPrecision | minimum allowed token to ETH rate in formula precision | Modifiers: [onlyAdmin](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-permissiongroups.md#onlyadmin)
\\
#### `setReserveAddress`[](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-liquidityconversionrates#setreserveaddress)
Sets the reserve contract address. Only admin can invoke.
***
function **setReserveAddress**(address reserve) public onlyAdmin | Parameter | Type | Description | | --------- |:-------:|:---------------------------:| | `address` | reserve | reserve's contract address | Modifiers: [onlyAdmin](https://docs.kyberswap.com/Legacy/api-abi/core-smart-contracts/api_abi-permissiongroups.md#onlyadmin)