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# IB20.unpause

> Resumes one or more paused token operation classes on a B20 token.

## Signature

```solidity IB20.sol theme={null}
function unpause(PausableFeature[] calldata features) external;
```

| Field               | Value              |
| ------------------- | ------------------ |
| Selector            | `0x8b93dd63`       |
| Canonical signature | `unpause(uint8[])` |

## Description

Resumes each feature listed in `features`. Features not listed remain in their current state. Duplicates in the array are a no-op. The call does not revert when a feature is already unpaused.

Emits `Unpaused(updater, features)` with the exact array passed. That array is not the resulting paused set, read `isPaused(feature)` or `pausedFeatures()` for the current state.

## Parameters

| Parameter  | Description                                                        |
| ---------- | ------------------------------------------------------------------ |
| `features` | One or more `PausableFeature` values to resume. Must be non-empty. |

## Reverts

* `AccessControlUnauthorizedAccount(account, neededRole)`: caller does not hold `UNPAUSE_ROLE`.
* `EmptyFeatureSet()`: `features` is an empty array.

## Access Control

`UNPAUSE_ROLE` gates this call. `UNPAUSE_ROLE` and `PAUSE_ROLE` are separate roles, so the account that pauses a feature does not have to be the account that resumes it.

## Policy Interaction

No direct policy interaction.

## Pausable Features

| Value      | Gates                                                    |
| ---------- | -------------------------------------------------------- |
| `TRANSFER` | `transfer`, `transferFrom`, and memo'd variants          |
| `MINT`     | `mint`, `mintWithMemo`, and Asset `batchMint`            |
| `BURN`     | `burn`, `burnWithMemo`, and the deprecated `burnBlocked` |
| `SEIZE`    | `seizeWithMemo`                                          |

## Example

```solidity Usage Example theme={null}
// Unpause BURN only; MINT remains paused if it was paused separately.
PausableFeature[] memory features = new PausableFeature[](1);
features[0] = PausableFeature.BURN;
IB20(target).unpause(features);
```