import { Contract } from 'ethers';
import { ConfigurationService } from 'src/configuration/configuration.service';
export declare class BlockchainService {
    readonly provider: any;
    private readonly configurationService;
    private readonly logger;
    private readonly blockTime;
    private contractInstances;
    constructor(provider: any, configurationService: ConfigurationService);
    returnSignerAddress(): string;
    private returnSignerWallet;
    getContractInstance(contractAddress: string, abi: any): Contract;
    fetchTransactionTimestamp(transactionHash: string): Promise<string>;
    waitForTheNextBlock(): Promise<void>;
    handleError(error: any, contractAddress: string): void;
    private handleBlockchainError;
    private handleOtherError;
}