import ContractBase, { TxParameters } from './ContractBase';
import { Account } from '../../nevermined';
import { BigNumber, ContractReceipt } from 'ethers';
export declare class NFTContractsBase extends ContractBase {
    owner(): Promise<string>;
    protected _createClone(name: string, symbol: string, uri: string, cap: BigNumber | undefined, operators?: string[], from?: Account, txParams?: TxParameters): Promise<any>;
    grantOperatorRole(operatorAddress: string, from?: Account, txParams?: TxParameters): Promise<ContractReceipt>;
    isOperator(address: string): Promise<boolean>;
    getNFTAttributes(did: string): Promise<{
        nftInitialized: boolean;
        nftSupply: BigNumber;
        mintCap: BigNumber;
        nftURI: string;
    }>;
    revokeOperatorRole(operatorAddress: string, from?: Account, txParams?: TxParameters): Promise<ContractReceipt>;
}