/**
 * Canonical payload digests for the durable application primitives (WFT-84).
 *
 * Idempotency binds a retry to `(caller, target, kind, payloadDigest)`, so the
 * digest has to be stable for values that are logically equal but built in a
 * different order. Object key insertion order, `Map` entry order, and `Set`
 * member order all change MessagePack bytes without changing meaning, so this
 * module canonicalizes those orderings first and only then hands the value to
 * Weft's structured-clone codec.
 *
 * Digesting the codec's own output — rather than a hand-rolled JSON walk — is
 * deliberate: `Uint8Array`, `Date`, `Map`, and `Set` keep their identity, so an
 * opaque multimodal or managed-asset reference contributes its real bytes to the
 * digest instead of being coerced to text.
 *
 * @module core/application-payload-digest
 */
import { WeftError } from './weft-error.ts';
/**
 * Thrown when a value cannot be canonicalized into a stable digest — a cycle, a
 * type the structured-clone codec cannot carry, or nesting past the depth
 * ceiling.
 *
 * Internal by design: callers see it re-thrown as the public
 * `ApplicationCommandValidationError` with this error as `cause`, so the public
 * error union stays small while the specific reason survives.
 */
export declare class PayloadDigestError extends WeftError<'PayloadDigestError'> {
    constructor(message: string);
}
/**
 * SHA-256 the canonical encoding of an arbitrary structured-clone value.
 *
 * @throws {PayloadDigestError} When the value cycles, nests too deeply, or holds
 * a type the structured-clone codec cannot carry.
 */
export declare function computePayloadDigest(value: unknown): Promise<string>;
/**
 * SHA-256 a list of opaque identity components, length-prefixed so no component
 * boundary can be forged by embedding a separator.
 */
export declare function computeIdentityDigest(components: readonly string[]): Promise<string>;