import type { TransformRequestInit } from './trustless-gateway.ts';
import type { Routing, BlockBroker, RoutingFindProvidersProgressEvents, BlockBrokerGetBlockProgressEvents } from '@helia/interface';
import type { ComponentLogger } from '@libp2p/interface';
import type { CID } from 'multiformats';
import type { ProgressEvent } from 'progress-events';
export declare const DEFAULT_ALLOW_INSECURE = false;
export declare const DEFAULT_ALLOW_LOCAL = false;
/**
 * The maximum number of bytes to allow when fetching a raw block.
 *
 * @see https://specs.ipfs.tech/bitswap-protocol/#block-sizes
 */
export declare const DEFAULT_MAX_SIZE = 2097152;
export interface TrustlessGatewayProvider {
    /**
     * The type of provider
     */
    type: 'trustless-gateway';
    /**
     * The CID that the provider can provide the block for
     */
    cid: CID;
    /**
     * The provider's URL
     */
    url: string;
    /**
     * Which routing implementation found the provider
     */
    routing: string;
}
export type TrustlessGatewayGetBlockProgressEvents = ProgressEvent<'trustless-gateway:get-block:fetch', URL> | ProgressEvent<'trustless-gateway:found-provider', TrustlessGatewayProvider> | RoutingFindProvidersProgressEvents | BlockBrokerGetBlockProgressEvents;
export interface TrustlessGatewayBlockBrokerInit {
    /**
     * By default we will only connect to peers with HTTPS addresses, pass true
     * to also connect to HTTP addresses.
     *
     * @default false
     */
    allowInsecure?: boolean;
    /**
     * By default we will only connect to peers with public or DNS addresses, pass
     * true to also connect to private addresses.
     *
     * @default false
     */
    allowLocal?: boolean;
    /**
     * Provide a function that will be called before querying trustless-gateways. This lets you modify the fetch options to pass custom headers or other necessary things.
     */
    transformRequestInit?: TransformRequestInit;
}
export interface TrustlessGatewayBlockBrokerComponents {
    routing: Routing;
    logger: ComponentLogger;
}
export declare function trustlessGateway(init?: TrustlessGatewayBlockBrokerInit): (components: TrustlessGatewayBlockBrokerComponents) => BlockBroker<TrustlessGatewayGetBlockProgressEvents>;
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