import { Signer } from 'ethers';
import { Provider } from "ethers/providers";
/**
 * Allowed Ethereum network for the SDK.
 */
export declare enum NETWORKS {
    HOMESTEAD = "homestead",
    ROPSTEN = "ropsten"
}
/**
 * Thrown when attempting to set an Invalid BlockChain Provider.
 */
export declare class InvalidProviderError extends Error {
    constructor(message?: string);
}
/**
 * The current BlockChain Provider of the SDK.
 */
export declare let provider: Provider | Signer | null;
/**
 * Get the current set BlockChain Provider.
 */
export declare function getProvider(): Provider | Signer;
/**
 * Set the BlockChain Provider for the SDK.
 * @param newProvider
 */
export declare function setProvider(newProvider: Provider | Signer | NETWORKS | string | null): void;
/**
 * Does the SDK allows to fetch data from unsecured providers?
 */
export declare let allowUnsecuredProviders: boolean;
/**
 * Configure the SDK with generic options. Invalid parameters will be ignored.
 * @param options
 * @params [options.allowUnsecuredProviders] Boolean.
 */
export declare function config(options: {
    allowUnsecuredProviders?: boolean;
}): void;
declare const _default: {
    enums: {
        NETWORKS: typeof NETWORKS;
    };
    errors: {
        InvalidProviderError: typeof InvalidProviderError;
    };
    config: typeof config;
    settings: {
        allowUnsecuredProviders: boolean;
    };
    getProvider: typeof getProvider;
    setProvider: typeof setProvider;
};
export default _default;