TypeScript Compile Type Error while calling introspectSchema with 'apollo-fetch'

[AdelBachene]

#I'm Trying to create a remote Schema and Im doing it like this:

import {makeRemoteExecutableSchema, introspectSchema} from 'graphql-tools';
import {createApolloFetch} from 'apollo-fetch';
const fetcher = createApolloFetch({uri: this.uri});
        return makeRemoteExecutableSchema({
            schema: await introspectSchema(fetcher),
            fetcher
        });

and I'm getting this error when I try to run my project

TSError: ⨯ Unable to compile TypeScript
2|SMALA-Ga | server/graphql/proxy/index.ts (18,43): Argument of type '{ schema: any; fetcher: ApolloFetch; }' is not assignable to parameter of type '{ schema: string | GraphQLSchema; link?: ApolloLink; fetcher?: Fetcher; }'.
2|SMALA-Ga | Types of property 'fetcher' are incompatible.
2|SMALA-Ga | Type 'ApolloFetch' is not assignable to type 'Fetcher'. (2345)

the message of the error is clear so when we check accepted parameters by introspectSchema we find ApolloLink | Fetcher only :

export default function introspectSchema(fetcher: ApolloLink | Fetcher, linkContext?: {
    [key: string]: any;
}): Promise<GraphQLSchema>;

but ApolloFetch which is the return type of createApolloFetch is not accepted
export declare function createApolloFetch(params?: FetchOptions): ApolloFetch;

well this issue can be fixed by changing the fetch to ApolloLink for example but personally, I like ApolloFetch due it's flexibility on changing the request parameters --> I mean something like this:

const fetcher = createApolloFetch({uri: this.uri});
        fetcher.use(({ request, options }, next) => {
            if(context.req.get('authorization')) {
                if (!options.headers) {
                    options.headers = {};
                }
                options.headers['Authorization'] = context.req.get('authorization');
                next();
            }

I'm Using TypeScript with ts-node

ts-node v6.0.0
node v9.5.0
typescript v2.8.1

I'm not really sure about supporting typescript in Apollo because I found other typing issues that I will report them in different threads.

[hnq90]

@AdelBachene Use const fetcher = createApolloFetch({uri: this.uri}) as any and the typing error will be disappeared.