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const WebSocket = require('ws')
const ws = new WebSocket('wss://api-pub.bitfinex.com/ws/2')
const messageStream = WebSocket.createWebSocketStream(ws, { encoding: 'utf8' })
ws.once('open', function open() {
ws.send(JSON.stringify({ event: 'subscribe', channel: 'book', len: 100, prec: 'P0', freq: 'F0', symbol: `tBTCUSD` }))
})
async function run() {
for await (let message of messageStream) {
console.log('string msg', message)
console.log('parsed msg', JSON.parse(message))
}
}
await run()
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