import { Principal } from "@dfinity/principal";
import { type _SERVICE as IcrcLedger } from "../../generated/candid/icrc_ledger/icrc_ledger.did";
import type { About, EvmChain, IcrcAccount, StepStatus, Token } from "../../types";
import { BaseStep } from "../baseStep";
export declare class ApproveStep extends BaseStep {
    private ledgerActor;
    private token;
    private icpAccount;
    private evmChain;
    private evmAddress;
    private amount;
    private decimals;
    private ledgerId;
    private oneSecId;
    constructor(ledgerActor: IcrcLedger, token: Token, icpAccount: IcrcAccount, evmChain: EvmChain, evmAddress: string, amount: bigint, decimals: number, ledgerId: Principal, oneSecId: Principal);
    about(): About;
    expectedDurationMs(): number;
    run(): Promise<StepStatus>;
}