/**
 * Canonical JSON debug rendering (SPEC.md §11).
 *
 * Non-contractual for the wire; contractual for golden vectors. Rendering
 * rules: frames in wire order with END omitted, field order per the SPEC
 * field tables, absent opt() fields omitted, binary fields as standard
 * base64, enums by their spec names, i64 as JSON numbers, json-typed
 * fields embedded as parsed JSON.
 */
import type { SyncMessage } from './message.js';
import type { RowColumn, SparseRowValue } from './row-codec.js';
import type { RowsSegment } from './segment.js';
export type JsonValue = null | boolean | number | string | JsonValue[] | {
    [key: string]: JsonValue;
};
/** Standard base64 (§11.1 rule 4). Dependency- and runtime-agnostic. */
export declare function bytesToBase64(bytes: Uint8Array): string;
export declare function renderMessageValue(message: SyncMessage): JsonValue;
/** `render(bytes) → json` for SSP2 messages (§11). */
export declare function renderMessage(bytes: Uint8Array): JsonValue;
export declare function renderRowsSegmentValue(segment: RowsSegment): JsonValue;
/** `render(bytes) → json` for standalone SSG2 rows segments (§11 rule 8). */
export declare function renderRowsSegment(bytes: Uint8Array): JsonValue;
/**
 * Render a decoded sparse row (RFC §6.1, §11 rule 11): the column table plus
 * `values` keyed by column name, carrying only the present columns, so an
 * absent column has no key and a present NULL renders as JSON `null`.
 */
export declare function renderSparseRowValue(columns: readonly RowColumn[], values: readonly SparseRowValue[]): JsonValue;