Get a MAC address unique to the device in Node.js

getMacAddress.js

  getMACAddress() {
    let vmMACPrefixes = [
      "00:50:56",
      "00:0C:29",
      "00:05:69",
      "00:1C:14",
      "0A:00:27",
      "00:03:FF",
      "00:1C:42",
      "00:0F:4B",
      "00:16:3E",
      "08:00:27",
      "02:42",
    ];
    let networkInterfaces = require('os').networkInterfaces();
    for (let interfaceName in networkInterfaces) {
      let interfaceDetails = networkInterfaces[interfaceName][0];
      if (
        // interface is not internal
        !interfaceDetails.internal &&
        // interface is not from a virtual machine
        vmMACPrefixes.reduce(
          (accumulator, currentValue) =>
            interfaceDetails.mac.startsWith(currentValue) ? false : accumulator,
          true
        )
      ) {
        return interfaceDetails.mac;
      }
    }
  }