> ## Documentation Index
> Fetch the complete documentation index at: https://base-a060aa97-mux-docs-claude-6.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# IB20.updateSupplyCap

> Generated B20 reference for updateSupplyCap(uint256).

## Signature

```solidity theme={null}
function updateSupplyCap(uint256 newSupplyCap) external;
```

| Field               | Value                      |
| ------------------- | -------------------------- |
| Selector            | `0xe5a97f07`               |
| Canonical signature | `updateSupplyCap(uint256)` |

## Description

Sets a new supply cap. May be raised or lowered freely, but never below current `totalSupply` and never above `type(uint128).max`. Emits `SupplyCapUpdated`.

## Parameters

| Parameter      | Description                                          |
| -------------- | ---------------------------------------------------- |
| `newSupplyCap` | New supply cap. Must not exceed `type(uint128).max`. |

## Reverts

* `AccessControlUnauthorizedAccount` when the caller does not hold `DEFAULT_ADMIN_ROLE`.
* `InvalidSupplyCap` when `newSupplyCap < totalSupply()` or `newSupplyCap > type(uint128).max`.

## Access control

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

## Policy interaction

No direct policy interaction.

## Example

```solidity theme={null}
IB20(target).updateSupplyCap(newSupplyCap);
```