@wordpress/block-editor/src/hooks/lock.js

Generic block editor.

/**
 * WordPress dependencies
 */
import { addFilter } from '@wordpress/hooks';

/**
 * Filters registered block settings, extending attributes to include `lock`.
 *
 * @param {Object} settings Original block settings.
 *
 * @return {Object} Filtered block settings.
 */
export function addAttribute( settings ) {
	// Allow blocks to specify their own attribute definition with default values if needed.
	if ( 'type' in ( settings.attributes?.lock ?? {} ) ) {
		return settings;
	}
	// Gracefully handle if settings.attributes is undefined.
	settings.attributes = {
		...settings.attributes,
		lock: {
			type: 'object',
		},
	};

	return settings;
}

addFilter( 'blocks.registerBlockType', 'core/lock/addAttribute', addAttribute );