/**
 * Pure content-hash functions for the simulation contract and CAEL traces.
 * Extracted from SimulationContract / CAELTrace to keep a single, testable surface.
 *
 * @see SimulationContract — re-exports for backward compatibility
 * @see sha256 — FNV-1a / SHA-256 mode dispatch
 */
import type { SimSolver } from './SimSolver';
import type { CAELTraceEntry } from './CAELTrace';
import { type HashMode } from './sha256';
export { HASH_MODE_DEFAULT, type HashMode } from './sha256';
export declare function hashGeometry(vertices: Float64Array | Float32Array | undefined, elements: Uint32Array | undefined, mode?: HashMode): string;
export declare function hashGpuOutput(data: Float32Array, mode?: HashMode): string;
/**
 * Per-field discretization quantum (paper-3 route-2b); exported for contract tests
 * and solver diagnostics.
 */
export declare function quantumForField(name: string): number;
type SolverForDigest = {
    getField: SimSolver['getField'];
    fieldNames?: SimSolver['fieldNames'] | Iterable<string> | {
        [Symbol.iterator]?: () => Iterator<string>;
    };
};
/**
 * Compute a canonical state digest from solver field buffers under the same rules
 * as the runtime contract (FNV-1a vs SHA-256, per-field q_f, fail-closed on non-finite).
 * Returns `''` when the solver has no iterable `fieldNames` (W4-T1: skip-with-empty).
 */
export declare function computeStateDigest(solver: SolverForDigest, hashMode: HashMode): string;
export declare function hashCAELEntry(entry: Omit<CAELTraceEntry, 'hash'>, mode?: HashMode): string;
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