metamask-extension/app/scripts/lib/random-id.js

const MAX = 1000000000

let idCounter = Math.round( Math.random() * MAX )
function createRandomId() {
  idCounter = idCounter % MAX
  return idCounter++
}

module.exports = createRandomId
Increment tx ids to avoid collisions Fixes #791 It was possible for two requests to have the same ID, causing a crash and loss of StreamProvider connection. This new id generation strategy creates a random ID, and increments it for each request. In case the id generator is included from two different processes, I'm initializing the counter at a random number, and rolling it over a large number when it gets too big. 2016-11-17 23:05:12 +01:00			`const MAX = 1000000000`

			`let idCounter = Math.round( Math.random() * MAX )`
			`function createRandomId() {`
			`idCounter = idCounter % MAX`
			`return idCounter++`
			`}`

			`module.exports = createRandomId`