export declare const maxSafeInteger: bigint;
export declare const minSafeInteger: bigint;
export declare class UnsafeIntegerError extends RangeError {
    readonly value: bigint;
    constructor(message: string, value: bigint);
}
export declare class AssertError extends Error {
    readonly message: string;
    readonly props?: any | undefined;
    constructor(message: string, props?: any | undefined);
}
export declare function assert(condition: unknown, message?: string, props?: any): asserts condition;
export declare function getByteLength(string: string): number;