/**
 * Privacy-safe storage failures which the push protocol is allowed to turn
 * into durable application-write rejections. Database-specific errors remain
 * attached only as an internal cause and never cross the protocol boundary.
 */
export declare class StorageConstraintError extends Error {
    readonly name = "StorageConstraintError";
    readonly opIndex: number | undefined;
    constructor(cause: unknown, opIndex?: number);
}
/** Stable, privacy-safe failures for trusted server storage queries. */
export type StorageQueryErrorCode = 'sync.storage.scan_requires_scope' | 'sync.storage.index_not_found' | 'sync.storage.index_not_materialized' | 'sync.storage.index_value_count_mismatch' | 'sync.storage.invalid_limit';
/**
 * Host-only query error. Messages never include identifiers, values, SQL,
 * paths, or row data; callers branch on `code`, never message text.
 */
export declare class StorageQueryError extends Error {
    readonly name = "StorageQueryError";
    readonly code: StorageQueryErrorCode;
    constructor(code: StorageQueryErrorCode);
}
/** SQLite primary/extended constraint result codes (`SQLITE_CONSTRAINT*`). */
export declare function isSqliteConstraintError(error: unknown): boolean;
/** PostgreSQL SQLSTATE class 23: integrity constraint violation. */
export declare function isPostgresConstraintError(error: unknown): boolean;
/**
 * D1 may preserve SQLite's structured code or expose only a bounded platform
 * prefix. The text fallback is adapter-private classification only: no part of
 * the original message is copied to the public StorageConstraintError.
 */
export declare function isD1ConstraintError(error: unknown): boolean;