import { AddressType } from 'libnexa-ts';
import { Balance } from '../types/wallet.types';
export declare const MAIN_WALLET_ID = -1;
export declare const MAX_INT64 = 9223372036854775807n;
export declare const VAULT_FIRST_BLOCK = 274710;
export declare const VAULT_SCRIPT_PREFIX = "0014461ad25081cb0119d034385ff154c8d3ad6bdd76";
export declare function isTestnet(): boolean;
export declare function isGenesisHashValid(hash: string): boolean;
export declare function isValidNexaAddress(address: string, type?: AddressType): boolean;
export declare function getExplorerUrl(): string;
export declare function currentTimestamp(): number;
export declare function estimateDateByFutureBlock(current: number, future: number): string;
export declare function isNullOrEmpty(arg?: string | any[] | null): arg is undefined | [] | null | '';
export declare function truncateStringMiddle(str?: string, maxLength?: number): string;
export declare function capitalizeFirstLetter(str: string): string;
export declare function getAddressBuffer(address: string): Uint8Array;
export declare function tokenIdToHex(token: string): string;
export declare function tokenHexToAddr(token: string): string;
export declare function tokenAmountToAssetAmount(amount?: string | number | bigint): string;
export declare function sumBalance(balances: Balance[]): Balance;
export declare function sumTokensBalance(balances: Record<string, Balance>[]): Record<string, Balance>;
export declare function getFileMediaType(filename: string): 'video' | 'audio' | 'image' | 'unknown';
export declare function getFileMimeType(filename: string): string;
export declare function sleep(ms: number): Promise<void>;
export declare function prettifyAmount(amount: string | number): string;
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