Owner Renounce Facet

Renounce ERC-173 ownership for diamonds

Key Features

• External renounceOwnership() sets OwnerStorage.owner to address(0) (same slot as owner() on OwnerDataFacet).
• Reverts OwnerUnauthorizedAccount for non-owners; emits OwnershipTransferred(previousOwner, address(0)) on success.

Storage

State Variables

Property	Type	Description
STORAGE_POSITION	bytes32	Owner storage position within the diamond (Value: keccak256("erc173.owner"))

OwnerStorage

Definition

/** storage-location erc8042:erc173.owner */
struct OwnerStorage {
  address owner;
}

Functions

renounceOwnership

Sets OwnerStorage.owner to address(0) if msg.sender is the current owner; otherwise reverts OwnerUnauthorizedAccount. Emits OwnershipTransferred(previousOwner, address(0)). After this call succeeds, owner-only operations that rely on the stored owner should no longer authorize anyone.

function renounceOwnership() external;

Events

Emitted after a successful renounce with newOwner == address(0).

Signature:

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

Errors

Signature:

error OwnerUnauthorizedAccount();

Security Considerations

Renouncement is irreversible at the storage layer: once owner is zeroed, there is no way to rollback this action.

If you need extra security, you can use the TwoSteps Ownership module, which requires the owner to set a pending owner address before renouncing.

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Last updated:March 24, 2026