/**
 * Internal helpers shared across storage providers.
 *
 * Underscore prefix denotes private-to-storage/; not re-exported from
 * packages/core/src/storage/index.ts.
 *
 * GAP-208 Phase 2a (2026-05-18).
 */
/**
 * Normalize the four accepted body types into a Uint8Array so providers
 * can compute size + hand a known buffer to their underlying SDKs.
 */
export declare function toUint8Array(data: Blob | ArrayBuffer | Uint8Array | ReadableStream<Uint8Array>): Promise<Uint8Array>;
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