import { Wallet } from 'ethers';
import type { EnvelopingRequest } from './common';
export default class AccountManager {
    private static instance;
    private readonly _accounts;
    private constructor();
    static getInstance(): AccountManager;
    getAccounts(): string[];
    addAccount(account: Wallet): void;
    removeAccount(addressToRemove: string): void;
    sign(envelopingRequest: EnvelopingRequest, signerWalletOnTheFly?: Wallet): Promise<string>;
}