# AggregatorV3Interface’s Methods

**decimals**

Get the number of decimal places of the answer.

**Returns** the number of decimal places.

<mark style="color:orange;">**`function`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`decimals()`</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">**`external`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`view returns (uint8)`</mark>

#### **description**

Get the description of the aggregator this proxy points to.

**Returns** the description of the aggregator.

<mark style="color:orange;">**`function`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`description()`</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">**`external`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`view returns (string memory)`</mark>

#### **version**

Get the version of the aggregator this proxy points to.

**Returns** the version of the aggregator.

<mark style="color:orange;">**`function`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`version()`</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">**`external`**</mark><mark style="color:orange;">` `</mark><mark style="color:orange;">`view returns (uint256)`</mark>

#### **getRoundData**

Get the details of the input round ID. The input round ID’s details are the same as getTimestamp(uint256 roundId) method.

**Returns**

* <mark style="color:orange;">`roundId`</mark>: The round ID.
* <mark style="color:orange;">`answer`</mark>: The answer of the round ID.
* <mark style="color:orange;">`startedAt`</mark>: Timestamp of when the round started. (In our case, this value is the same as <mark style="color:orange;">`updatedAt`</mark>)
* <mark style="color:orange;">`updatedAt`</mark>: Timestamp of when the round was updated.
* <mark style="color:orange;">`answeredInRound`</mark>: The round ID of the round in which the answer was computed. (In our case, this value is the same as <mark style="color:orange;">`roundId`</mark>)

```
function getRoundData(uint80 _roundId)
    external 
    view 
    returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    )
```

#### **latestRoundData**

Get the details of the latest round.

**Returns**

* <mark style="color:orange;">`roundId`</mark>: The round ID.
* <mark style="color:orange;">`answer`</mark>: The answer of the round ID.
* <mark style="color:orange;">`startedAt`</mark>: Timestamp of when the round started. (In our case, this value is the same as <mark style="color:orange;">`updatedAt`</mark>)
* <mark style="color:orange;">`updatedAt`</mark>: Timestamp of when the round was updated.
* <mark style="color:orange;">`answeredInRound`</mark>: The round ID of the round in which the answer was computed. (In our case, this value is the same as <mark style="color:orange;">`roundId`</mark>)

```
function latestRoundData()
    external 
    view 
        returns (
        uint80 roundId,
        int256 answer,
        uint256 startedAt,
        uint256 updatedAt,
        uint80 answeredInRound
    )
```