import moment from 'moment';
import { EthereumDate, EthereumEntityName, EthereumSymbol } from '../models/generalModels';
export declare function isValidEthereumDateString(str: string): str is EthereumDate;
export declare function isValidEthereumUnit(unit: string): boolean;
export declare function isValidEthereumEntityName(str: EthereumEntityName | string): str is EthereumEntityName;
/** A string - assumption is that it follows ERC20 naming convention */
export declare function isValidEthereumSymbol(str: EthereumSymbol | string): str is EthereumSymbol;
export declare function toEthereumDate(date: string | Date | moment.Moment | EthereumDate): EthereumDate;
export declare function toEthereumEntityName(name: string): EthereumEntityName;
/** Construct a valid Ethereum symbol */
export declare function toEthereumSymbol(symbol: string): EthereumSymbol;