import type { LedgerEntry } from './types.js';
declare const GENESIS_HASH: string;
/**
 * Compute the SHA-256 hash of a ledger entry.
 * Hash covers: sequence + previousHash + timestamp + provider + model + operation + input + output + tokens
 * This is the content-addressable fingerprint — if any field changes, the hash changes.
 */
export declare function computeEntryHash(entry: Omit<LedgerEntry, 'hash'>): string;
/**
 * Verify that an entry's hash matches its content.
 */
export declare function verifyEntryHash(entry: LedgerEntry): boolean;
/**
 * Verify the link between two consecutive entries.
 */
export declare function verifyLink(current: LedgerEntry, previous: LedgerEntry | null): boolean;
export { GENESIS_HASH };
//# sourceMappingURL=hash.d.ts.map