/** @holoscript/core/paper-0c-spike — CAEL paper-0c primitives (subgrid attestation) */
export type HashMode = 'fnv1a' | 'sha256';
export declare const DEFAULT_HASH_MODE: HashMode;
export type SubgridParamValue = number | boolean | string;
export type SubgridParams = Record<string, SubgridParamValue>;
export interface SubgridAttestation {
  readonly hash: string;
  readonly hashMode: HashMode;
  readonly canonicalForm: string;
}
export type VerifyResult =
  | { readonly valid: true }
  | {
      readonly valid: false;
      readonly reason: 'hashMode-mismatch' | 'hash-mismatch' | 'canonical-form-mismatch';
      readonly expected: string;
      readonly actual: string;
    };
export declare class MissingSubgridParamsError extends Error { constructor(); }
export declare class InvalidSubgridParamValueError extends Error { constructor(key: string, value: unknown); }
export declare function canonicalizeSubgridParams(params: SubgridParams): string;
export declare function hashSubgridParams(params: SubgridParams, mode: 'fnv1a'): string;
export declare function hashSubgridParams(params: SubgridParams, mode: 'sha256'): Promise<string>;
export declare function hashSubgridParams(params: SubgridParams, mode?: HashMode): string | Promise<string>;
export declare function attestSubgridParams(params: SubgridParams, mode: 'fnv1a'): SubgridAttestation;
export declare function attestSubgridParams(params: SubgridParams, mode: 'sha256'): Promise<SubgridAttestation>;
export declare function attestSubgridParams(params: SubgridParams, mode?: HashMode): SubgridAttestation | Promise<SubgridAttestation>;
export declare function verifySubgridAttestation(attestation: SubgridAttestation, params: SubgridParams): VerifyResult;
export declare function verifySubgridAttestationAsync(attestation: SubgridAttestation, params: SubgridParams): Promise<VerifyResult>;