import { type BoundedJsonValue } from "../schemas/json-value.js";
export type OAuthStateMetadata = Record<string, BoundedJsonValue>;
/**
 * Snapshot optional transaction metadata into a small, data-only JSON object.
 *
 * Persistent TokenStore implementations commonly serialize this row. Keeping
 * one canonical JSON boundary prevents accessors, cycles, class instances, and
 * oversized values from changing meaning across in-memory and durable stores.
 */
export declare function snapshotOAuthStateMetadata(value: unknown): OAuthStateMetadata | null;
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