/**
 * Typed error surface for sqlite3mc-backed page-level encryption failures.
 *
 * Three concrete failure modes are surfaced:
 *
 *   - `invalid_key_length`: caller-side pre-flight (key not 32 bytes).
 *   - `encryption_not_supported_for_ephemeral`: caller-side pre-flight (encryption was requested on an ephemeral
 *     `:memory:` store, which sqlite3mc does not support).
 *   - `decrypt_failed`: runtime failure raised when sqlite3mc cannot decode page 1 of an existing database. Covers
 *     both "wrong key supplied" and "no key supplied to an encrypted DB".
 */
export type SqliteEncryptionErrorCode = 'invalid_key_length' | 'encryption_not_supported_for_ephemeral' | 'decrypt_failed';
/**
 * Error thrown by sqlite-opfs when an encryption operation fails.
 **/
export declare class SqliteEncryptionError extends Error {
    readonly code: SqliteEncryptionErrorCode;
    constructor(code: SqliteEncryptionErrorCode, message: string, opts?: {
        cause?: unknown;
    });
}
/**
 * Returns `true` if `message` matches one of the known sqlite3mc decrypt-failure
 * strings.
 **/
export declare function isDecryptFailureMessage(message: string): boolean;
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