export declare class ServiceError extends Error {
    original?: any;
    constructor(message: string, original?: any);
}
export declare function wrapError(context: string, error: unknown): ServiceError;
export declare function selectMaybeSingle<T = any>(query: any): Promise<T | null>;
export declare function select<T = any>(query: any): Promise<T[]>;
export declare function insertSingle<T = any>(table: any, values: any[]): Promise<T>;
export declare function upsertSingle<T>(query: {
    upsert: (payload: Partial<T>, options?: {
        onConflict?: string;
    }) => any;
}, payload: Partial<T>, options?: {
    onConflict?: string;
}): Promise<T>;
export declare function sleep(ms: number): Promise<unknown>;
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