/**
 * Anchor proof persistence, stored ALONGSIDE the ndjson ledger so a verifier
 * can find both together:
 *   ~/.agentguard/<tenant>/anchor.ots    latest raw calendar proof bytes (binary)
 *   ~/.agentguard/<tenant>/anchor.json   small append-only index of AnchorProof
 *
 * The index is what `agentguard verify` reads to report external timestamping.
 *
 * Patent notice: Protected by U.S. patent-pending technology
 * (App. Nos. 63/983,615; 63/983,621; 63/983,843; 63/984,626;
 * 64/071,781; 64/071,789).
 */
import type { AnchorProof } from './types';
export declare function defaultHome(): string;
export declare function anchorDir(tenant: string, home?: string): string;
export declare function anchorIndexPath(tenant: string, home?: string): string;
export declare function anchorProofPath(tenant: string, home?: string): string;
/** Append a proof to the tenant index and write its raw bytes to anchor.ots. */
export declare function writeAnchorProof(tenant: string, proof: AnchorProof, home?: string): void;
/** Overwrite the tenant index with `proofs` and refresh the raw .ots sidecar
 *  from the most recent proof. Used by `anchor --upgrade` to update proofs in
 *  place (idempotent) rather than appending duplicates. */
export declare function replaceAnchorIndex(tenant: string, proofs: AnchorProof[], home?: string): void;
export declare function readAnchorIndex(tenant: string, home?: string): AnchorProof[];
/** Read an anchor index directly from a path (used by verify beside a trace). */
export declare function readAnchorIndexAt(indexPath: string): AnchorProof[];
/** The most recent proof recorded for a given head hash, if any. */
export declare function findAnchorForHead(proofs: AnchorProof[], headHashHex: string): AnchorProof | null;
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