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> Fetch the complete documentation index at: https://base-a060aa97-mux-docs-claude-6.mintlify.site/llms.txt
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# IB20.updatePolicy

> Generated B20 reference for updatePolicy(bytes32,uint64).

## Signature

```solidity theme={null}
function updatePolicy(bytes32 policyScope, uint64 newPolicyId) external;
```

| Field               | Value                          |
| ------------------- | ------------------------------ |
| Selector            | `0xadf9c4ea`                   |
| Canonical signature | `updatePolicy(bytes32,uint64)` |

## Description

Updates the policy ID assigned to `policyScope`. Takes effect immediately for the next operation that consults this slot. Emits `PolicyUpdated`.

## Parameters

| Parameter     | Description                      |
| ------------- | -------------------------------- |
| `policyScope` | Policy slot scope.               |
| `newPolicyId` | Policy ID to assign to the slot. |

## Reverts

* `AccessControlUnauthorizedAccount` when the caller does not hold `DEFAULT_ADMIN_ROLE`.
* `UnsupportedPolicyType` when `policyScope` is not recognized by this token.
* `PolicyNotFound` when `newPolicyId` is not a built-in sentinel and does not exist in the registry.

## Access control

`DEFAULT_ADMIN_ROLE` gates this call. Factory initCalls bypass the role gate during creation.

## Policy interaction

Reads or writes a token policy-scope pointer into the PolicyRegistry.

## Example

```solidity theme={null}
IB20(token).updatePolicy(B20Constants.MINT_RECEIVER_POLICY, policyId);
```