import type { AddOn } from '@heroku/types/3.sdk';
import type { ResourceCtx } from '../../../core/extend-resource.js';
import type { AddOnAttachmentWithInclusions } from '../../platform/add-on-attachment/resolve.js';
/**
 * Returns the first legacy database add-on on the app.
 */
export declare function findLegacyDatabase(ctx: Pick<ResourceCtx, 'platform'>, appIdentity: string): Promise<AddOn>;
export declare const getPostgresServiceName: () => string;
/**
 * `AddOnAttachmentWithInclusions` is an internal type. The public `isPostgresAddon` takes `AddOn` only.
 */
export declare const isPostgresAddonInternal: (addon: AddOn | AddOnAttachmentWithInclusions["addon"]) => boolean;
export declare const isPostgresAddon: (addon: AddOn) => boolean;
export declare const isAdvancedDatabase: (addon: AddOn) => boolean;
export declare const isLegacyDatabase: (addon: AddOn) => boolean;