import { ApiPromise } from '@polkadot/api';
import { SdkOptions, SdkSigner, ChainProperties } from '@unique-nft/sdk/types';

declare class Sdk {
    #private;
    readonly options: SdkOptions;
    signer?: SdkSigner;
    static create(options: SdkOptions): Promise<Sdk>;
    constructor(options: SdkOptions);
    get api(): ApiPromise;
    connect(): Promise<void>;
    chainProperties(): ChainProperties;
}

declare type Constructor<T, S> = new (sdk: S) => T;
/**
 * add feature to Sdk
 * @param key
 * @param FeatureConstructor
 */
declare function addFeature<T, S = Sdk>(key: string, FeatureConstructor: Constructor<T, S>): void;

export { Sdk, addFeature };