import { Contract } from "ethers";
import type { About, EvmChain, IcrcAccount, StepStatus, Token } from "../../types";
import { BaseStep } from "../baseStep";
export declare class ApproveStep extends BaseStep {
    private erc20Contract;
    private token;
    private evmChain;
    private icpAccount;
    private evmAmount;
    private decimals;
    private lockerAddress;
    constructor(erc20Contract: Contract, token: Token, evmChain: EvmChain, icpAccount: IcrcAccount, evmAmount: bigint, decimals: number, lockerAddress: string);
    about(): About;
    expectedDurationMs(): number;
    run(): Promise<StepStatus>;
}