# ChainlinkCalculator

A helper contract for interactions with [https://docs.chain.link](https://docs.chain.link/)

## Functions[​](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#functions) <a href="#functions" id="functions"></a>

### singlePrice[​](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#singleprice) <a href="#singleprice" id="singleprice"></a>

```javascript
function singlePrice(
  contract AggregatorV3Interface oracle,
  uint256 inverseAndSpread,
  uint256 amount
) external returns (uint256)
```

Calculates price of token relative to oracle unit (ETH or USD)

**Parameters:**[**​**](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#parameters)

| Name               | Type                           | Description                                                                                                                                                                                                                                                                                                                            |
| ------------------ | ------------------------------ | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `oracle`           | contract AggregatorV3Interface | concatenated inverse flag and spread. Lowest 254 bits specify spread amount. Spread is scaled by 1e9, i.e. 101% = 1.01e9, 99% = 0.99e9. Highest bit is set when oracle price should be inverted, e.g. for DAI-ETH oracle, inverse=false means that we request DAI price in ETH and inverse=true means that we request ETH price in DAI |
| `inverseAndSpread` | uint256                        |                                                                                                                                                                                                                                                                                                                                        |
| `amount`           | uint256                        |                                                                                                                                                                                                                                                                                                                                        |

**Return Values:**[**​**](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#return-values)

| Name     | Type    | Description           |
| -------- | ------- | --------------------- |
| `Amount` | uint256 | *spread* oracle price |

### doublePrice[​](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#doubleprice) <a href="#doubleprice" id="doubleprice"></a>

```javascript
function doublePrice(
  contract AggregatorV3Interface oracle1,
  contract AggregatorV3Interface oracle2,
  uint256 spread,
  int256 decimalsScale,
  uint256 amount
) external returns (uint256)
```

Calculates price of token A relative to token B. Note that order is important

**Parameters:**[**​**](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#parameters-1)

| Name            | Type                           | Description |
| --------------- | ------------------------------ | ----------- |
| `oracle1`       | contract AggregatorV3Interface |             |
| `oracle2`       | contract AggregatorV3Interface |             |
| `spread`        | uint256                        |             |
| `decimalsScale` | int256                         |             |
| `amount`        | uint256                        |             |

**Return Values:**[**​**](https://docs.1inch.io/docs/limit-order-protocol/smart-contract/helpers/ChainlinkCalculator#return-values-1)

| Name     | Type    | Description                         |
| -------- | ------- | ----------------------------------- |
| `Result` | uint256 | Token A relative price times amount |