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28 lines
1.0 KiB
28 lines
1.0 KiB
import ObjectMultiplex from 'obj-multiplex';
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import pump from 'pump';
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import { EXTENSION_MESSAGES } from '../../../shared/constants/app';
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/**
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* Sets up stream multiplexing for the given stream
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*
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* @param {any} connectionStream - the stream to mux
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* @returns {stream.Stream} the multiplexed stream
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*/
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export function setupMultiplex(connectionStream) {
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const mux = new ObjectMultiplex();
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/**
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* We are using this streams to send keep alive message between backend/ui without setting up a multiplexer
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* We need to tell the multiplexer to ignore them, else we get the " orphaned data for stream " warnings
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* https://github.com/MetaMask/object-multiplex/blob/280385401de84f57ef57054d92cfeb8361ef2680/src/ObjectMultiplex.ts#L63
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*/
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mux.ignoreStream(EXTENSION_MESSAGES.CONNECTION_READY);
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mux.ignoreStream('ACK_KEEP_ALIVE_MESSAGE');
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mux.ignoreStream('WORKER_KEEP_ALIVE_MESSAGE');
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pump(connectionStream, mux, connectionStream, (err) => {
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if (err) {
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console.error(err);
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}
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});
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return mux;
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}
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