import { PostgreSQL } from "./types";
export declare function is_paying_customer(db: PostgreSQL, account_id: string): Promise<boolean>;
export declare function set_account_info_if_possible(opts: {
    db: PostgreSQL;
    account_id: string;
    email_address: string | undefined;
    first_name: string | undefined;
    last_name: string | undefined;
}): Promise<void>;
export declare function set_account(db: PostgreSQL, account_id: string, set: {
    [field: string]: any;
}): Promise<void>;
export declare function get_account(db: PostgreSQL, account_id: string, columns: string[]): Promise<void>;