export declare enum TypeOpts {
    STRING = "string",
    NUMBER = "number",
    BOOLEAN = "boolean"
}
/**
 * The schema used by each Source to control/coerce what types it accepts.
 */
export interface SourceSchema {
    [key: string]: {
        /** A user-friendly prompt for this input. */
        description: string;
        /** The data type that should be accepted. */
        type: TypeOpts;
        /** The default value this should return */
        default: any;
    };
}
/**
 * Some generally-applicable schema values for Sources.
 */
export declare const ListingOptionsSchema: SourceSchema;