providers/src/fetchers/fetch.ts

/**
 * This file is a very relaxed definition of the fetch api
 * Only containing what we need for it to function.
 */

export type FetchOps = {
  headers: Record<string, string>;
  method: string;
  body: any;
  credentials?: 'include' | 'same-origin' | 'omit';
};

export type FetchHeaders = {
  get(key: string): string | null;
  set(key: string, value: string): void;
};

export type FetchReply = {
  text(): Promise<string>;
  json(): Promise<any>;
  extraHeaders?: FetchHeaders;
  extraUrl?: string;
  headers: FetchHeaders;
  url: string;
  status: number;
};

export type FetchLike = (url: string, ops?: FetchOps | undefined) => Promise<FetchReply>;