# dydx

{% tabs %}
{% tab title="DyDx.sol" %}

```javascript
// Solidity Interface

interface DyDx {
  struct val {
       uint256 value;
   }

   struct set {
      uint128 borrow;
      uint128 supply;
  }

  function getEarningsRate() external view returns (val memory);
  function getMarketInterestRate(uint256 marketId) external view returns (val memory);
  function getMarketTotalPar(uint256 marketId) external view returns (set memory);
}
```

{% endtab %}
{% endtabs %}