import { ChainTracker, HttpClient, HttpClientRequestOptions, HttpClientResponse, WhatsOnChainConfig } from '@bsv/sdk';
type LocalWhatsOnChainConfig = WhatsOnChainConfig & {
    requestTimeoutMsecs?: number;
};
/**
 * Represents a chain tracker based on What's On Chain .
 */
export default class SdkWhatsOnChain implements ChainTracker {
    readonly network: string;
    readonly apiKey: string;
    protected readonly URL: string;
    protected readonly httpClient: HttpClient;
    protected readonly requestTimeoutMsecs: number;
    /**
     * Constructs an instance of the WhatsOnChain ChainTracker.
     * `tstn` and `regtest` have no WhatsOnChain service, so every request made for them is refused.
     *
     * @param {'main' | 'test' | 'stn' | 'ttn' | 'tstn' | 'regtest'} network - The BSV network to use when calling the WhatsOnChain API.
     * @param {WhatsOnChainConfig} config - Configuration options for the WhatsOnChain ChainTracker.
     */
    constructor(network?: 'main' | 'test' | 'stn' | 'ttn' | 'tstn' | 'regtest', config?: LocalWhatsOnChainConfig);
    /**
     * False for networks with no WhatsOnChain service (tstn, regtest). Every request made by
     * such an instance is refused.
     */
    get isAvailable(): boolean;
    protected request<T, Data = unknown>(url: string, options: HttpClientRequestOptions<Data>): Promise<HttpClientResponse<T>>;
    isValidRootForHeight(root: string, height: number): Promise<boolean>;
    currentHeight(): Promise<number>;
    protected getHttpHeaders(): Record<string, string>;
}
export {};
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