import type { BigNumberish } from "@ethersproject/bignumber";
import type { BigNumber } from "ethers";
export declare function toTitleCase(str: string): string;
/**
 * Formats a number or number string into a pretty USD string
 * @example
 * formatUSD(-1234567.89) // "-$1,234,567.89"
 */
export declare function formatUSD(amount: number | string): string;
/**
 * A globally unique ID generator, useful for stateless or readonly things
 * @returns
 * uuid/v1, in case we need to extract the timestamp when debugging
 */
export declare function generateUniqueId(): string;
export declare function isMobile(): boolean;
/**
 * True if we're in the mobile environment.
 */
export declare const IS_MOBILE: boolean;
export declare function isServiceWorker(): boolean;
/**
 * Make any necessary changes to URIs before the client queries them.
 *
 * TODO: replace host with host of caching layer for thumbnail generation, caching,
 * SVG sanitization, etc.
 */
export declare function externalResourceUri(uri: string, options?: {
    cached?: boolean;
}): string;
export declare function proxyImageUrl(url: string): string;
export declare function toDisplayBalance(nativeBalance: BigNumber, decimals: BigNumberish, truncate?: boolean): string;
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