import type { Json } from '../types.js';
/**
 * Derives a document's content id: `base64url(SHA-256(utf8(canonicalize(doc))))`,
 * no padding. Byte-identical across replicas for the same logical document, so a
 * content-addressed resource lands on the same id everywhere it is stored.
 *
 * @param doc {Json}   the document to address
 * @returns {string}   the unpadded base64url content id (43 chars for SHA-256)
 */
export declare function contentCid(doc: Json): string;
/**
 * Named-options alias of {@link contentCid}, for callers that address a `doc`
 * by keyword. Synchronous; a caller that `await`s the result still works.
 *
 * @param options {object}
 * @param options.doc {object}   the document to address
 * @returns {string}
 */
export declare function cidFrom({ doc }: {
    doc: object;
}): string;
/**
 * Derives a Space id from a controller DID: `base64url(SHA-256(utf8(did)))`, no
 * padding. Byte-identical across replicas, so the same controller lands on the
 * same WAS Space wherever it connects.
 *
 * @param controllerDid {string}   the Space controller (e.g. a `did:key`)
 * @returns {string}   the unpadded base64url Space id
 */
export declare function deriveSpaceId(controllerDid: string): string;
//# sourceMappingURL=cid.d.ts.map