import { Fetch, FunctionInvokeOptions, FunctionRegion, FunctionsResponse } from './types';
/**
 * Client for invoking Supabase Edge Functions.
 */
export declare class FunctionsClient {
    protected url: string;
    protected headers: Record<string, string>;
    protected region: FunctionRegion;
    protected fetch: Fetch;
    /**
     * Creates a new Functions client bound to an Edge Functions URL.
     *
     * @example
     * ```ts
     * import { FunctionsClient, FunctionRegion } from '@supabase/functions-js'
     *
     * const functions = new FunctionsClient('https://xyzcompany.supabase.co/functions/v1', {
     *   headers: { apikey: 'public-anon-key' },
     *   region: FunctionRegion.UsEast1,
     * })
     * ```
     *
     * @category Functions
     *
     * @example Creating a Functions client
     * ```ts
     * import { FunctionsClient, FunctionRegion } from '@supabase/functions-js'
     *
     * const functions = new FunctionsClient('https://xyzcompany.supabase.co/functions/v1', {
     *   headers: { apikey: 'public-anon-key' },
     *   region: FunctionRegion.UsEast1,
     * })
     * ```
     */
    constructor(url: string, { headers, customFetch, region, }?: {
        headers?: Record<string, string>;
        customFetch?: Fetch;
        region?: FunctionRegion;
    });
    /**
     * Updates the authorization header
     * @param token - the new jwt token sent in the authorisation header
     *
     * @category Functions
     *
     * @example Setting the authorization header
     * ```ts
     * functions.setAuth(session.access_token)
     * ```
     */
    setAuth(token: string): void;
    /**
     * Invokes a function
     * @param functionName - The name of the Function to invoke.
     * @param options - Options for invoking the Function.
     * @example
     * ```ts
     * const { data, error } = await functions.invoke('hello-world', {
     *   body: { name: 'Ada' },
     * })
     * ```
     *
     * @category Functions
     *
     * @remarks
     * - Requires an Authorization header.
     * - Invoke params generally match the [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) spec.
     * - When you pass in a body to your function, we automatically attach the Content-Type header for `Blob`, `ArrayBuffer`, `File`, `FormData` and `String`. If it doesn't match any of these types we assume the payload is `json`, serialize it and attach the `Content-Type` header as `application/json`. You can override this behavior by passing in a `Content-Type` header of your own.
     * - Responses are automatically parsed as `json`, `blob` and `form-data` depending on the `Content-Type` header sent by your function. Responses are parsed as `text` by default.
     *
     * @example Basic invocation
     * ```js
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   body: { foo: 'bar' }
     * })
     * ```
     *
     * @exampleDescription Error handling
     * A `FunctionsHttpError` error is returned if your function throws an error, `FunctionsRelayError` if the Supabase Relay has an error processing your function and `FunctionsFetchError` if there is a network error in calling your function.
     *
     * @example Error handling
     * ```js
     * import { FunctionsHttpError, FunctionsRelayError, FunctionsFetchError } from "@supabase/supabase-js";
     *
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   headers: {
     *     "my-custom-header": 'my-custom-header-value'
     *   },
     *   body: { foo: 'bar' }
     * })
     *
     * if (error instanceof FunctionsHttpError) {
     *   const errorMessage = await error.context.json()
     *   console.log('Function returned an error', errorMessage)
     * } else if (error instanceof FunctionsRelayError) {
     *   console.log('Relay error:', error.message)
     * } else if (error instanceof FunctionsFetchError) {
     *   console.log('Fetch error:', error.message)
     * }
     * ```
     *
     * @exampleDescription Passing custom headers
     * You can pass custom headers to your function. Note: supabase-js automatically passes the `Authorization` header with the signed in user's JWT.
     *
     * @example Passing custom headers
     * ```js
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   headers: {
     *     "my-custom-header": 'my-custom-header-value'
     *   },
     *   body: { foo: 'bar' }
     * })
     * ```
     *
     * @exampleDescription Calling with DELETE HTTP verb
     * You can also set the HTTP verb to `DELETE` when calling your Edge Function.
     *
     * @example Calling with DELETE HTTP verb
     * ```js
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   headers: {
     *     "my-custom-header": 'my-custom-header-value'
     *   },
     *   body: { foo: 'bar' },
     *   method: 'DELETE'
     * })
     * ```
     *
     * @exampleDescription Invoking a Function in the UsEast1 region
     * Here are the available regions:
     * - `FunctionRegion.Any`
     * - `FunctionRegion.ApNortheast1`
     * - `FunctionRegion.ApNortheast2`
     * - `FunctionRegion.ApSouth1`
     * - `FunctionRegion.ApSoutheast1`
     * - `FunctionRegion.ApSoutheast2`
     * - `FunctionRegion.CaCentral1`
     * - `FunctionRegion.EuCentral1`
     * - `FunctionRegion.EuWest1`
     * - `FunctionRegion.EuWest2`
     * - `FunctionRegion.EuWest3`
     * - `FunctionRegion.SaEast1`
     * - `FunctionRegion.UsEast1`
     * - `FunctionRegion.UsWest1`
     * - `FunctionRegion.UsWest2`
     *
     * @example Invoking a Function in the UsEast1 region
     * ```js
     * import { createClient, FunctionRegion } from '@supabase/supabase-js'
     *
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   body: { foo: 'bar' },
     *   region: FunctionRegion.UsEast1
     * })
     * ```
     *
     * @exampleDescription Calling with GET HTTP verb
     * You can also set the HTTP verb to `GET` when calling your Edge Function.
     *
     * @example Calling with GET HTTP verb
     * ```js
     * const { data, error } = await supabase.functions.invoke('hello', {
     *   headers: {
     *     "my-custom-header": 'my-custom-header-value'
     *   },
     *   method: 'GET'
     * })
     * ```
     *
     * @example Example 7
     * ```ts
     * const { data, error } = await functions.invoke('hello-world', {
     *   body: { name: 'Ada' },
     * })
     * ```
     */
    invoke<T = any>(functionName: string, options?: FunctionInvokeOptions): Promise<FunctionsResponse<T>>;
}
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