@substreams/node/dist/src/interceptors.js

Substreams for Node.js & Web

export function createAuthInterceptor(token) {
    const headers = new Headers({ "X-Api-Key": token });
    return createHeadersInterceptor(headers);
}
export function defaultHeadersInterceptor() {
    const headers = new Headers({ "X-User-Agent": "@substreams/node" });
    return createHeadersInterceptor(headers);
}
export function createHeadersInterceptor(headers) {
    return (next) => async (req) => {
        for (const [key, value] of Array.from(headers)) {
            req.header.set(key, value);
        }
        return next(req);
    };
}
export function createInterceptors(token, headers) {
    const interceptors = [defaultHeadersInterceptor()];
    if (token) {
        interceptors.push(createAuthInterceptor(token));
    }
    if (headers) {
        interceptors.push(createHeadersInterceptor(headers));
    }
    return interceptors;
}
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