import log from 'loglevel' /** * Returns a middleware that logs RPC activity * @param {{ origin: string }} opts - The middleware options * @returns {Function} */ export default function createLoggerMiddleware (opts) { return function loggerMiddleware (/** @type {any} */ req, /** @type {any} */ res, /** @type {Function} */ next) { next((/** @type {Function} */ cb) => { if (res.error) { log.error('Error in RPC response:\n', res) } if (req.isMetamaskInternal) { return } log.info(`RPC (${opts.origin}):`, req, '->', res) cb() }) } }