import { Chain } from '../../../../sdk/types';
import { BlockHeader } from '../../../../sdk/WalletServices.interfaces';
import { WhatsOnChain, WocChainInfo } from '../../../providers/WhatsOnChain';
import { ChaintracksFetchApi } from '../Api/ChaintracksFetchApi';
import { HeightRange } from '../util/HeightRange';
/**
 * return true to ignore error, false to close service connection
 */
export type ErrorHandler = (code: number, message: string) => boolean;
export type EnqueueHandler = (header: BlockHeader) => void;
export interface WhatsOnChainServicesOptions {
    /**
     * Which chain is being tracked: main, test, or stn.
     */
    chain: Chain;
    /**
     * WhatsOnChain.com API Key
     * https://docs.taal.com/introduction/get-an-api-key
     * If unknown or empty, maximum request rate is limited.
     * https://developers.whatsonchain.com/#rate-limits
     */
    apiKey?: string;
    /**
     * Request timeout for GETs to https://api.whatsonchain.com/v1/bsv
     */
    timeout: number;
    /**
     * User-Agent header value for requests to https://api.whatsonchain.com/v1/bsv
     */
    userAgent: string;
    /**
     * Enable WhatsOnChain client cache option.
     */
    enableCache: boolean;
    /**
     * How long chainInfo is considered still valid before updating (msecs).
     */
    chainInfoMsecs: number;
}
export declare class WhatsOnChainServices {
    options: WhatsOnChainServicesOptions;
    static createWhatsOnChainServicesOptions(chain: Chain): WhatsOnChainServicesOptions;
    static readonly chainInfo: Array<WocChainInfo | undefined>;
    static readonly chainInfoTime: Array<Date | undefined>;
    static readonly chainInfoMsecs: number[];
    chain: Chain;
    woc: WhatsOnChain;
    constructor(options: WhatsOnChainServicesOptions);
    getHeaderByHash(hash: string): Promise<BlockHeader | undefined>;
    getChainInfo(): Promise<WocChainInfo>;
    getChainTipHeight(): Promise<number>;
    getChainTipHash(): Promise<string>;
    /**
     * @param fetch
     * @returns returns the last 10 block headers including height, size, chainwork...
     */
    getHeaders(fetch?: ChaintracksFetchApi): Promise<WocGetHeadersHeader[]>;
    getHeaderByteFileLinks(neededRange: HeightRange, fetch?: ChaintracksFetchApi): Promise<GetHeaderByteFileLinksResult[]>;
}
export interface WocGetHeaderByteFileLinks {
    files: string[];
}
export interface WocGetHeadersHeader {
    hash: string;
    confirmations: number;
    size: number;
    height: number;
    version: number;
    versionHex: string;
    merkleroot: string;
    time: number;
    mediantime: number;
    nonce: number;
    bits: string;
    difficulty: number;
    chainwork: string;
    previousblockhash: string;
    nextblockhash: string;
    nTx: number;
    num_tx: number;
}
export declare function wocGetHeadersHeaderToBlockHeader(h: WocGetHeadersHeader): BlockHeader;
export interface GetHeaderByteFileLinksResult {
    sourceUrl: string;
    fileName: string;
    range: HeightRange;
    data: Uint8Array | undefined;
}
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