export declare class DigestIntegrityError extends Error {
    code: 'DIGEST_CONFLICT' | 'DIGEST_ALTERED' | 'DIGEST_MISSING' | 'DIGEST_NOT_A_FILE';
    constructor(code: DigestIntegrityError['code'], message: string);
}
export declare const digestJournalPath: (orgDir: string) => string;
/**
 * Writes the digest of message `id` for `to` and returns its path, or checks it
 * when this id was already written (a retry). Throws DigestIntegrityError on any
 * mismatch; other I/O errors propagate.
 */
export declare function writeDigest(orgDir: string, to: string, id: string, body: string): string;
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