export declare function kms10OriginalKeyHash(key: string): string;
export interface Kms10RemoteRevision {
    etag: string;
    size: number;
}
export interface Kms10HeadRevision {
    etag: string;
    size: number;
    metadata?: Record<string, string>;
}
/**
 * Prove that a changed ETag is only the re-encryption copy. The marker alone
 * is insufficient: require the listed revision, byte count, and persisted
 * content hash to match the prior journal baseline, or the source ETag to
 * match the prior journal revision for older files without hash metadata.
 */
export declare function isKms10CopyOfJournalBase(listed: Kms10RemoteRevision, head: Kms10HeadRevision | null, journalHash: string, journalEtag: string, expectedKey: string): boolean;
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