import type { Provider } from 'ethers';
import type { AuthOptions } from '../types/interfaces/auth.interface';
export declare class Auth {
    private readonly alchemy?;
    private readonly infura?;
    private readonly provider;
    /**
     *
     * The main class for the Auth library.
     *
     * @param {AuthOptions} opts - An object containing the authentication options for the Ethereum API providers.
     * @param {Object} opts.alchemy - An object containing the Alchemy API key (required if no Infura key is provided).
     * @param {string} opts.alchemy.apiKey - The Alchemy API key.
     * @param {Object} opts.infura - An object containing the Infura API key and secret (required if no Alchemy key is provided).
     * @param {string} opts.infura.apiKey - The Infura API key.
     * @param {string} opts.infura.apiKeySecret - The Infura API key secret.
     */
    constructor(opts: AuthOptions);
    /**
     *
     * Retrieves the Ethereum provider.
     *
     * @function
     * @returns {Provider} - The Ethereum provider.
     **/
    getProvider: () => Provider;
    /**
     *
     * Retrieves the API authentication data for the Ethereum API providers.
     *
     * @function
     * @returns {{ alchemy: string | undefined, infura: string | undefined }} - An object containing the API authentication data for the Ethereum API providers.
     **/
    getApiAuth: () => {
        alchemy: string | undefined;
        infura: string | undefined;
    };
    /**
     * Sets the Ethereum provider based on the API authentication data for the Ethereum API providers.
     * @function
     * @throws {Error} Throws an error if no API key is provided for the Ethereum API providers.
     * @returns {Provider} - The Ethereum provider based on the API authentication data.
     **/
    private setProvider;
}
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