import { TransactionResponse } from "@ethersproject/providers";
import { BigNumber } from "@ethersproject/bignumber";
import { BuidlerRuntimeEnvironment, DeploymentsExtension, Artifact, EthereumProvider } from "@nomiclabs/buidler/types";
import { PartialExtension } from "./types";
export declare function addHelpers(env: BuidlerRuntimeEnvironment, partialExtension: PartialExtension, // TODO
getArtifact: (name: string) => Promise<Artifact>, onPendingTx: (txResponse: TransactionResponse, name?: string, data?: any) => Promise<TransactionResponse>, getGasPrice: () => Promise<BigNumber | undefined>, log: (...args: any[]) => void, print: (msg: string) => void): DeploymentsExtension;
export declare function waitForTx(ethereum: EthereumProvider, txHash: string, isContract: boolean): Promise<any>;
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