import { EosDate, EosAsset, EosEntityName, EosSymbol } from '../models/generalModels';
/**  Expects a format of time_point/time_point_sec
 * Example here: https://eosio.stackexchange.com/questions/4830/can-we-store-date-on-eosio-table/4831
 * */
export declare function isValidEosDate(str: string): str is EosDate;
export declare function isValidEosAsset(str: EosAsset | string): str is EosAsset;
/** Expects a string composed of up to 7 upper-case letters */
export declare function isValidEosSymbol(str: EosSymbol | string): str is EosSymbol;
export declare function isValidEosEntityName(str: EosEntityName | string): str is EosEntityName;
export declare function toEosDate(date: string | Date | EosDate): EosDate;
/** pads an amount string with decimal places (specified by precision) as needed by EOS chain
/*   e.g. amount:'1', precision:4 = '1.0000'  */
export declare function toEosAssetPaddedAmount(amount: string, precision?: number): string;
/** Construct a well-formatted EOS Asset string
 *  amount is a string that must contain the number of precision digits that the token was created with
 *  e.g. '1.0000 EOS' for EOS (4 digits of precision) or '1.00 MYSM' for a token created with 2 decimals of precision */
export declare function toEosAsset(amount: string, symbol: string, precision?: number): EosAsset;
/** Construct a valid EOS Symbol - e.g. 'EOS' */
export declare function toEosSymbol(symbol?: string): EosSymbol;
export declare function toEosEntityName(name: string): EosEntityName;
/**
 * Returns a valid eosEntityName or null (Useful when the name can be null)
 */
export declare function toEosEntityNameOrNull(name: string): EosEntityName;
/**
 * Returns a valid eosEntityName or empty string (Useful when eos transactions accepts empty string)
 */
export declare function toEosEntityNameOrEmptyString(name: string): EosEntityName | '';
/** Create or decompose an EosAsset
 *  Provide either qty and symbol OR a fully formed string (e.g. '1.000 EOS') */
export declare class EosAssetHelper {
    private _amount;
    private _symbol;
    private _asset;
    constructor(amount?: string, symbol?: string, assetString?: string);
    get asset(): import("@open-rights-exchange/chain-js/dist/cjs/src/models").ChainAssetBrand;
    get amount(): string;
    /** The options provided when the transaction class was created */
    get symbol(): import("@open-rights-exchange/chain-js/dist/cjs/src/models").ChainSymbolBrand;
    /** Convert a string with a number and symbol into a well-formed EOS asset string - if possible */
    toEosAssetFromString(assetString?: string): EosAsset;
}