example-gun.user-id-problem-idea-fix.js

var bitHex = 8;

//idea is that when a pub key gets created, the user stores this int32 in its profile.
//then when you go to fetch the list of pubkeys, hash the key and also fetch the int32 from the profile
//compair the alias + int32 and show the user profile(s) to the requesting user for decision
//when user has decided save the pubkey and any other meta data you wish 

var sha256_toint_test = "something like a publickey that has a reference of the output int32";

console.log(sha256_toint_test);

sha256(sha256_toint_test).then(function(data){
    console.log(data);// <-- hash buffer
    
    console.log(buf2hex1(data));// <-- hash hex
    
    console.log(toInt(buf2hex1(data)));// <-- int32
});

function buf2hex1(buffer) { // buffer is an ArrayBuffer
  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');
}

function toInt(hash){
    return parseInt(hash.slice(0,bitHex),16);
}

function sha256(data){
    return window.crypto.subtle.digest('SHA-256', new window.TextEncoder("utf-8").encode(data)); //<---   must use https:// 
}