/** A single API cost rule: JsonLogic `conditions` → `consumption` (number or expression). */
export interface ICostRule {
    conditions: Record<string, any>;
    consumption: number | Record<string, any>;
    hidden?: boolean;
}
/** First matching rule's consumption (evaluated against payload). 0 if none match, undefined if rules invalid. */
export declare function getConsumption(payload: Record<string, any>, rules: ICostRule[]): number | undefined;
/** Format a consumption value (trims trailing zeros). `-` for nullish, `0` for zero. */
export declare function formatConsumption(consumption: number | undefined | null, fractionDigits?: number): string;
export interface PriceResult {
    value: number;
    currency: string;
    label: string;
}
export interface PriceFormatterConfig {
    /** Current exchange-rate map, keyed `usd-<currency>` (e.g. from a store). */
    getExchange: () => Record<string, number> | undefined | null;
    /** Current target currency, e.g. `cny`. */
    getCurrency: () => string | undefined | null;
    /** currency code → display label/symbol. */
    currencyLabels: Record<string, string>;
    /** Fallback currency when none resolved. Default `usd`. */
    defaultCurrency?: string;
}
export interface PriceFormatter {
    getPrice(payload: {
        value: number;
        currency?: string;
    }): PriceResult;
    getPriceString(payload: {
        value?: number;
        defaultValue?: number;
        fractionDigits?: number;
    }): string;
    getConsumptionPriceString(consumption: number | undefined | null, fractionDigits?: number): string;
}
/** Build currency-aware price formatters; exchange/currency/labels are injected. */
export declare function createPriceFormatter(config: PriceFormatterConfig): PriceFormatter;
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