import { type ApprovalEntry } from "../../../domain/sentinel/policy/approval.js";
export declare class ApprovalChainTamperedError extends Error {
    readonly atIndex: number;
    readonly entryId: string;
    constructor(atIndex: number, entryId: string);
}
export declare function appendApprovalEntry(chain: readonly ApprovalEntry[], draft: Omit<ApprovalEntry, "prevHash" | "hash">): ApprovalEntry;
export declare function verifyApprovalChain(chain: readonly ApprovalEntry[]): void;
//# sourceMappingURL=approval-chain.d.ts.map