export declare class Utils {
    static addHexPrefix(hex: string): string;
    static removeHexPrefix(hex: string): string;
    static isZeroHex(value: string): boolean;
    static min(...values: bigint[]): bigint;
    static max(...values: bigint[]): bigint;
    /**
     * Parses JSON text such that integers outside the safe number range are returned as bigint
     * values instead of being rounded.
     */
    static parseJsonWithBigInts(text: string): any;
    static sleep(ms: number): Promise<void>;
}
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