/**
 * Deterministic identity helpers for observed rows, events, and repairs.
 *
 * Storage records the resulting values but does not choose their contents;
 * identical normalized input must always produce the same identity.
 */
import type { NormalizedCell } from "../../encoding/types.js";
import type { EventKeyInput } from "./contracts.js";
/**
 * Computes the source-independent event key for a normalized row change.
 *
 * @throws {DuplicateChangedFieldError} when the event lists one field twice.
 */
export declare function computeEventKey(input: EventKeyInput): string;
/** Computes a stable hash for a normalized row's field values. */
export declare function computeRowHash(rowBindingId: string, fields: ReadonlyMap<string, {
    readonly cell: NormalizedCell;
}>): string;
/** Computes the visible-state guard used by a system-field repair effect. */
export declare function computeRepairGuardHash(rowBindingId: string, illegalFields: ReadonlyArray<readonly [string, NormalizedCell]>): string;
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