import * as plugins from '../plugins.js';
import { type TWebPushDnsLookup } from './helpers.webpush-endpoint.js';
export interface IWebPushTransportRequest {
    subscription: plugins.webpush.PushSubscription;
    payload: string;
    ttlSeconds: number;
    urgency: plugins.webpush.Urgency;
    topic?: string;
    vapid: {
        subject: string;
        publicKey: string;
        privateKey: string;
    };
}
export interface IWebPushTransportResponse {
    statusCode: number;
    retryAfter?: string;
}
export interface IWebPushTransport {
    send(requestArg: IWebPushTransportRequest): Promise<IWebPushTransportResponse>;
}
export type TWebPushTransportErrorCode = 'PUSH_DNS_TIMEOUT' | 'PUSH_REQUEST_TIMEOUT' | 'PUSH_RESPONSE_TOO_LARGE' | 'PUSH_RESPONSE_INVALID' | 'PUSH_NETWORK_ERROR';
export declare class WebPushTransportError extends Error {
    readonly code: TWebPushTransportErrorCode;
    constructor(code: TWebPushTransportErrorCode, optionsArg?: {
        cause?: unknown;
    });
}
export interface IWebPushHttpTransportOptions {
    dnsLookup?: TWebPushDnsLookup;
    dnsTimeoutMs?: number;
    connectTimeoutMs?: number;
    requestTimeoutMs?: number;
    maxResponseBytes?: number;
}
export declare class WebPushHttpTransport implements IWebPushTransport {
    private readonly dnsLookup?;
    private readonly dnsTimeoutMs;
    private readonly connectTimeoutMs;
    private readonly requestTimeoutMs;
    private readonly maxResponseBytes;
    constructor(optionsArg?: IWebPushHttpTransportOptions);
    send(requestArg: IWebPushTransportRequest): Promise<IWebPushTransportResponse>;
    private normalizePositiveInteger;
}