import type { ArkmeExtensionManager } from '../../extensions/manager.js';
import type { ArkmeExtensionPreviewItem } from '../../extensions/types.js';
export interface ResolvedPreviewImage {
    index: number;
    mediaType: 'image/png' | 'image/jpeg' | 'image/webp';
    data: Uint8Array;
    digest: string;
}
export interface PreviewBatchResult {
    outcome: 'complete' | 'partial';
    extension_id: string;
    added_count: number;
    preview_images: ArkmeExtensionPreviewItem[];
    preview_revision: number;
    failed?: {
        index: number;
        message: string;
    };
}
export declare function previewImageDigest(data: Uint8Array): string;
export declare function previewImageFingerprint(extensionId: string, images: readonly ResolvedPreviewImage[]): string;
export declare function preflightResolvedPreviewBatch(input: {
    extensionId: string;
    images: readonly ResolvedPreviewImage[];
    manager: ArkmeExtensionManager;
    signal?: AbortSignal;
}): Promise<{
    existing: ArkmeExtensionPreviewItem[];
    missing: ResolvedPreviewImage[];
    previewRevision: number;
}>;
export declare function addResolvedPreviewBatch(input: {
    extensionId: string;
    images: readonly ResolvedPreviewImage[];
    manager: ArkmeExtensionManager;
    signal?: AbortSignal;
}): Promise<PreviewBatchResult>;
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