Hyperswarm record max size should be less than MTU

hyperswarm-dht-record-max-size.js

import DHT from '@hyperswarm/dht'

const MTU = 1500
const payloadSize = MTU / 2

const payload = random(payloadSize)

const dht = new DHT()

const mutablePutResponse = await dht.mutablePut(dht.defaultKeyPair, payload)
console.log("MutablePut successfull", { closestNodes: mutablePutResponse.closestNodes.length })

const mutableGetResponse = await dht.mutableGet(dht.defaultKeyPair.publicKey) 
console.log("MutableGet response:", { success: !!mutableGetResponse, retrieved_size: mutableGetResponse.value.byteLength  })

dht.destroy()

function random (size = 32) {
  return Buffer.concat(
    Array(Math.ceil(size / 4)).fill(fourbytes())
  ).slice(0, size)

  function fourbytes() {
    return Buffer.from(Math.random().toString('16').slice(2, 10), "hex")
  }
}