middleware

function withMiddleware(middlewares: RequestMiddleware[]): RequestMiddleware

function withProxy(config: RequestProxyConfig): RequestMiddleware

type RequestConfig = {
  url: string;
  method: string;
  headers?: Record<string, string | string[]>;
}

type RequestMiddleware = (
  request: RequestConfig,
) => Promise<RequestConfig>

type ProxyRuntimeEnv = {
  isBrowser: boolean;
}

type ProxyRuntimeGate = | "browser"
  | "always"
  | ((env: ProxyRuntimeEnv) => boolean)

type RequestProxyConfig = {
  targetUrl: string;
  when?: ProxyRuntimeGate;
}