import type { TypedDocumentNode } from '@graphql-typed-document-node/core';
import type { MaskError, PromiseOrValue } from '@envelop/core';
import type { createFetch } from '@whatwg-node/fetch';
import type { GraphQLSchema } from 'graphql';
export declare type GraphQLSchemaWithContext<TContext> = GraphQLSchema & {
    _context?: TContext;
};
export interface GraphQLParams<TVariables = Record<string, any>, TExtensions = Record<string, any>> {
    operationName?: string;
    query?: string;
    variables?: TVariables;
    extensions?: TExtensions;
}
export interface YogaInitialContext {
    /**
     * GraphQL Parameters
     */
    params: GraphQLParams;
    /**
     * An object describing the HTTP request.
     */
    request: Request;
}
export declare type CORSOptions = {
    origin?: string[] | string;
    methods?: string[];
    allowedHeaders?: string[];
    exposedHeaders?: string[];
    credentials?: boolean;
    maxAge?: number;
} | false;
export declare type GraphQLServerInject<TData = any, TVariables = Record<string, any>, TServerContext extends Record<string, any> = Record<string, any>> = {
    /** GraphQL Operation to execute */
    document: string | TypedDocumentNode<TData, TVariables>;
    /** Variables for GraphQL Operation */
    variables?: TVariables;
    /** Name for GraphQL Operation */
    operationName?: string;
    /** Set any headers for the GraphQL request */
    headers?: HeadersInit;
} & ({} extends TServerContext ? {
    serverContext?: TServerContext;
} : {
    serverContext: TServerContext;
});
declare global {
    interface ReadableStream<R = any> {
        [Symbol.asyncIterator]: () => AsyncIterator<R>;
    }
}
export declare type FetchAPI = ReturnType<typeof createFetch>;
export interface FetchEvent extends Event {
    request: Request;
    respondWith(response: PromiseOrValue<Response>): void;
}
export declare type YogaMaskedErrorOpts = {
    maskError: MaskError;
    errorMessage: string;
    isDev?: boolean;
};
export declare type MaybeArray<T> = T | T[];