export namespace amountPattern {
    let brand: import("@endo/patterns").Matcher;
    let value: import("@endo/patterns").Matcher;
}
export namespace ratioPattern {
    export { amountPattern as numerator };
    export { amountPattern as denominator };
}
export function addSubtract<A extends Amount>(base: A, gain: A, loss: A): A;
export function subtractToEmpty<T extends Amount>(left: T, right: T): T;
export function assertOnlyKeys(proposal: ProposalRecord, keys: string[]): void;
export function allEmpty(amounts: Amount[]): boolean;
export function checkDebtLimit(debtLimit: Amount<"nat">, totalDebt: Amount<"nat">, toMint: Amount<"nat">): void;
export function makeNatAmountShape(brand: Brand, min?: NatValue): {
    brand: globalThis.Brand;
    value: import("@endo/patterns").Matcher;
};
export function quoteAsRatio(quoteAmount: Pick<PriceDescription, "amountIn" | "amountOut">): import("@agoric/ertp/src/ratio").Ratio;
export type MetricsPublisherKit<T> = {
    metricsPublication: IterationObserver<T>;
    metricsSubscription: StoredSubscription<T>;
};
export type MetricsPublishKit<T> = {
    metricsPublisher: Publisher<T>;
    metricsSubscriber: StoredSubscriber<T>;
};
import type { PriceDescription } from '@agoric/zoe/tools/types.js';
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