/**
 * Returns a middleware that appends the DApp origin to request
 * @param {{ origin: string }} opts - The middleware options
 * @returns {Function}
 */
export default function createOriginMiddleware (opts) {
  return function originMiddleware (/** @type {any} */ req, /** @type {any} */ _, /** @type {Function} */ next) {
    req.origin = opts.origin
    next()
  }
}