/**
 * @file Hive RPC client implementation.
 * @author Johan Nordberg <code@johan-nordberg.com>
 * @license
 * Copyright (c) 2017 Johan Nordberg. All Rights Reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 *  1. Redistribution of source code must retain the above copyright notice, this
 *     list of conditions and the following disclaimer.
 *
 *  2. Redistribution in binary form must reproduce the above copyright notice,
 *     this list of conditions and the following disclaimer in the documentation
 *     and/or other materials provided with the distribution.
 *
 *  3. Neither the name of the copyright holder nor the names of its contributors
 *     may be used to endorse or promote products derived from this software without
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * You acknowledge that this software is not designed, licensed or intended for use
 * in the design, construction, operation or maintenance of any military facility.
 */
/// <reference types="node" />
import { Blockchain } from "./helpers/blockchain";
import { BroadcastAPI } from "./helpers/broadcast";
import { DatabaseAPI } from "./helpers/database";
import { RCAPI } from "./helpers/rc";
/**
 * Library version.
 */
export declare const VERSION: string;
/**
 * Main Hive network chain id.
 */
export declare const DEFAULT_CHAIN_ID: Buffer;
/**
 * Main Hive network address prefix.
 */
export declare const DEFAULT_ADDRESS_PREFIX = "STM";
/**
 * RPC Client options
 * ------------------
 */
export interface ClientOptions {
    /**
     * Hive chain id. Defaults to main hive network:
     * need the new id?
     * `0000000000000000000000000000000000000000000000000000000000000000`
     *
     */
    chainId?: string;
    /**
     * Hive address prefix. Defaults to main network:
     * `STM`
     */
    addressPrefix?: string;
    /**
     * Send timeout, how long to wait in milliseconds before giving
     * up on a rpc call. Note that this is not an exact timeout,
     * no in-flight requests will be aborted, they will just not
     * be retried any more past the timeout.
     * Can be set to 0 to retry forever. Defaults to 60 * 1000 ms.
     */
    timeout?: number;
    /**
     * Specifies the amount of times the urls (RPC nodes) should be
     * iterated and retried in case of timeout errors.
     * (important) Requires url parameter to be an array (string[])!
     * Can be set to 0 to iterate and retry forever. Defaults to 3 rounds.
    */
    failoverThreshold?: number;
    /**
     * Retry backoff function, returns milliseconds. Default = {@link defaultBackoff}.
     */
    backoff?: (tries: number) => number;
    /**
     * Node.js http(s) agent, use if you want http keep-alive.
     * Defaults to using https.globalAgent.
     * @see https://nodejs.org/api/http.html#http_new_agent_options.
     */
    agent?: any;
}
/**
 * RPC Client
 * ----------
 * Can be used in both node.js and the browser. Also see {@link ClientOptions}.
 */
export declare class Client {
    /**
     * Client options, *read-only*.
     */
    readonly options: ClientOptions;
    /**
     * Address to Hive RPC server.
     * String or String[] *read-only*
    */
    address: string | string[];
    /**
     * Database API helper.
     */
    readonly database: DatabaseAPI;
    /**
     * RC API helper.
     */
    readonly rc: RCAPI;
    /**
     * Broadcast API helper.
     */
    readonly broadcast: BroadcastAPI;
    /**
     * Blockchain helper.
     */
    readonly blockchain: Blockchain;
    /**
     * Chain ID for current network.
     */
    readonly chainId: Buffer;
    /**
     * Address prefix for current network.
     */
    readonly addressPrefix: string;
    private timeout;
    private backoff;
    private failoverThreshold;
    private currentAddress;
    /**
     * @param address The address to the Hive RPC server, e.g. `https://api.hive.blog`. or [`https://api.hive.blog`, `https://another.api.com`]
     * @param options Client options.
     */
    constructor(address: string | string[], options?: ClientOptions);
    /**
     * Create a new client instance configured for the testnet.
     */
    static testnet(options?: ClientOptions): Client;
    /**
     * Make a RPC call to the server.
     *
     * @param api     The API to call, e.g. `database_api`.
     * @param method  The API method, e.g. `get_dynamic_global_properties`.
     * @param params  Array of parameters to pass to the method, optional.
     *
     */
    call(api: string, method: string, params?: any): Promise<any>;
}