import { EthereumTransactionCursor } from '../../types/transaction';
import { EthereumInfoClient, EthereumInfoClientTransactionsResult } from './EthereumInfoClient';
export declare class EtherscanInfoClient extends EthereumInfoClient {
    private readonly apiKey?;
    constructor(baseURL: string, apiKey?: string | undefined);
    fetchTransactions(address: string, limit: any, cursor?: EthereumTransactionCursor): Promise<EthereumInfoClientTransactionsResult>;
    fetchContractTransactions(contractAddress: string, address: string, limit: number, cursor?: EthereumTransactionCursor): Promise<EthereumInfoClientTransactionsResult>;
}