import { BigNumber } from 'ethers';
export declare abstract class DwebError extends Error {
    abstract code: string;
    constructor(message: string);
}
export declare class InsufficientAllowanceError extends DwebError {
    readonly code: string;
    readonly allowedAmount: BigNumber;
    readonly requiredAmount: BigNumber;
    readonly token: string;
    constructor(allowed: BigNumber, required: BigNumber, token: string);
}
export declare class InsufficientBalanceError extends DwebError {
    readonly code: string;
    readonly balance: BigNumber;
    readonly requiredAmount: BigNumber;
    readonly token: string;
    constructor(balance: BigNumber, required: BigNumber, token: string);
}