import { BigNumber } from 'ethers';
import { Provider } from '@ethersproject/providers';
export declare enum LoanProvider {
    Equalizer = 1,
    Aave = 2
}
export declare abstract class LoanProviderBase {
    protected readonly widoContractAddress: string;
    protected readonly asset: string;
    protected readonly amount: BigNumber;
    protected readonly rpcProvider: Provider;
    private computedFee;
    constructor(widoContractAddress: string, asset: string, amount: BigNumber, rpcProvider: Provider);
    /**
     * Returns the provider type
     */
    abstract id(): LoanProvider;
    /**
     * Computes the fee of this provider for the given asset/amount
     */
    abstract computeFee(): Promise<BigNumber>;
    /**
     * Checks whether the provider is eligible for the given asset/amount
     */
    abstract canBeUsed(): Promise<boolean>;
    /**
     * Returns the fee of the provider
     */
    fee(): Promise<BigNumber>;
}