/**
 * @since 0.0.1
 */
import type { Either } from "fp-ts/Either";
import { Body } from "./Body.js";
import { HttpError } from "./internal/error.js";
import { HttpResponseEither } from "./internal/response/index.js";
/**
 * @since 0.0.1
 * @category model
 */
export type Init = RequestInit | (Omit<RequestInit, "body"> & {
    body?: Body | BodyInit;
}) | Body;
/**
 * @since 0.0.1
 * @category model
 */
export interface Adapter {
    (url: string | URL, init?: RequestInit): Promise<Either<HttpError, Response>>;
}
/**
 * @since 0.0.1
 * @category model
 */
export type Fetch<E> = (...args: Parameters<Adapter>) => Promise<Either<E | HttpError, Response>>;
/**
 * @since 0.0.1
 * @category constructor
 */
export declare const fetch: <E>(fetch: Fetch<E>) => (url: string | URL, init?: RequestInit | undefined) => Promise<Either<E | HttpError, Response>>;
/**
 * @since 0.0.1
 * @category constructor
 */
export declare const fetch_: <E>(fetch: Fetch<E>) => (url: string | URL, init?: RequestInit) => Promise<HttpResponseEither<E | HttpError>>;