import { SupportedEncodings } from 'uint8arrays/from-string';
export declare function hexToByteArray(hexString: string): Uint8Array<ArrayBuffer>;
export declare function getChainId(chain: string): string;
export declare function toHexString(byteArray: Uint8Array): string;
export declare function concatUint8Arrays(buffer1: Uint8Array, buffer2: Uint8Array): Uint8Array<ArrayBuffer>;
export declare function splitToUint8Arrays(array: Uint8Array, index: number): Uint8Array<ArrayBuffer>[];
export declare function base64encode(value: any, urlSafe: boolean): string;
export declare function base64decode(value: string, urlSafe: boolean): {
    toString(): string;
    toObject(): any;
    toUint8Array(): Uint8Array<ArrayBufferLike>;
};
export declare function checkWSUrl(url: string): boolean;
export declare const resolveWebSocketImplementation: () => {
    new (url: string | URL, protocols?: string | string[]): WebSocket;
    prototype: WebSocket;
    readonly CONNECTING: 0;
    readonly OPEN: 1;
    readonly CLOSING: 2;
    readonly CLOSED: 3;
};
export declare const hasBuiltInWebSocket: () => boolean;
export declare const hasLocalStorage: () => boolean;
export declare const resolveLocalStorage: () => Storage;
export declare const isBrowser: () => boolean;
export declare const RANDOM_LENGTH = 32;
export declare function hashKey(key: string, encode?: SupportedEncodings): string;
export declare function generateRandomBytes32(): Uint8Array<ArrayBufferLike>;
export declare function generateTopic(): string;
export declare function generateGroupId(): string;
export declare const isValidObject: (obj: any) => number | false;
export declare function isInIOSLine(): boolean;
export declare function isInIOSLark(): boolean;
export declare function isInIOSChrome(): boolean;
export declare function isInIOSWeChat(): boolean;
export declare function isIos(): boolean;
export declare function getLastSixMd5Hash(input: string): string;
export declare function toSafeBase64FromBase64(base64: string): string;
export declare function useShortLink(): boolean;
export declare const chainName2IdMap: Map<string, string>;
export declare const chainIdToStandardChainIdMap: Map<string, string>;
export declare function replaceChainNameToChainId(chainId: string): string;
export declare function replaceChainIdToChainName(chainId: string): string;
export declare function getNamespaceKeyByChain(chain: string): string | undefined;
export declare function scopePollingDetectionStrategy(detect: () => boolean): void;