Owner Renounce Module

ERC-173 renounce ownership for diamond facets

Key Features

• Helper functions for renouncing ownership and storage access.
• renounceOwnership guards by requiring msg.sender is the stored owner.
• Emits OwnershipTransferred with newOwner == address(0).

Module Usage

Import this module into facets or shared setup code. Its functions are internal (including Solidity file-level helpers). Use them through your facet’s external entrypoints.

Storage follows the diamond slot layout in this file; any code using the same STORAGE_POSITION or related positions reads and writes shared state.

See Facets & Modules for more information.

Storage

State Variables

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

OwnerStorage

Definition

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

Functions

getStorage

Returns a pointer to the ERC-173 OwnerStorage struct. Uses inline assembly to bind the slot to STORAGE_POSITION.

function getStorage() pure returns (OwnerStorage storage s);

Returns:

Property	Type	Description
s	OwnerStorage storage	The struct in storage.

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renounceOwnership

Internal renounce path: requires msg.sender == s.owner, then sets owner to address(0) and emits OwnershipTransferred(previousOwner, address(0)). Reverts OwnerUnauthorizedAccount if the caller is not the current owner.

function renounceOwnership();

Events

Emitted when the stored owner changes. After renounceOwnership, newOwner is address(0).

Signature:

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

Errors

Thrown when msg.sender is not the stored owner during renounceOwnership.

Signature:

error OwnerUnauthorizedAccount();

Best Practices

• Call renounceOwnership only from a trusted external wrapper after you intend to give up owner control permanently.
• Keep the same STORAGE_POSITION and OwnerStorage layout as other owner modules; do not fork a second owner slot.

Integration Notes

OwnerStorage lives at keccak256("erc173.owner") inside the diamond—the same slot as OwnerDataMod, OwnerDataFacet, and OwnerRenounceFacet. Renouncing here updates what owner() reads elsewhere.

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Last updated:March 24, 2026