import { HardhatPluginError } from "hardhat/plugins";
import { EthereumProvider } from "hardhat/types";
export declare class NetworkProberError extends HardhatPluginError {
    constructor(message: string);
}
export declare function getEtherscanEndpoint(provider: EthereumProvider): Promise<URL>;
export declare function retrieveContractBytecode(address: string, provider: EthereumProvider): Promise<string | null>;
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