challenge.js

document.documentElement.classList.remove("no-scripts");
document.documentElement.classList.add("scripts");

window.sssg_challenge = function (hashString, difficulty, numerToCalculatePatienceTime) {
  console.log("Starting work.");

  const worker = new Worker("/.sssg/public/worker.js");

  document.getElementById("loader").setAttribute("class", "playing");

  let currentUnixTime = Date.now()
  var deadLine = currentUnixTime + (6e4 - (currentUnixTime % 6e4)) + 6e4 * numerToCalculatePatienceTime;
  var finalSolution = null
  var amountOfCores = navigator.hardwareConcurrency
  var initialPosition = 4503599627370496 * Math.random()
  var attempt_number = initialPosition;

  console.log(`\t${deadLine - currentUnixTime}ms of patience.\n\tSalt is ${hashString}\n\tDifficutly of ${difficulty}\n\tInitial position of ${initialPosition}`);

  for (var u = 0; u < amountOfCores; ++u) worker.postMessage({ attempt: attempt_number, difficulty: difficulty, salt: hashString }), ++attempt_number;

  window.addEventListener("storage", (e) => {
    "sssg_clearance" == e.key &&
      e.newValue &&
      (worker.terminate(),
      "PAUSE" != e.newValue
        ? (console.log(
            `Accepting answer from LocalStorage!\n\t${e.newValue}`
          ),
          window.location.reload())
        : console.log("SessionStorage instructs a pause."));
  });

  worker.addEventListener("message",
    ({ data: { attempt: attempt, solution: solution } }) => {
      var newAttemptNumber = attempt + amountOfCores;

      if (null === solution) {
        var howManyAttempts = newAttemptNumber - initialPosition;

        null === finalSolution && (howManyAttempts % 1e4 == 0 && (console.log(`\tAttempt #${howManyAttempts}`),
        Date.now() > deadLine && (console.log("RAN OUT OF TIME!"), location.reload())),
        worker.postMessage({ attempt: newAttemptNumber, difficulty: difficulty, salt: hashString }));

      } else {
        console.log(`Work concluded after ${Date.now() - currentUnixTime}ms.\n\t${solution}`);
        finalSolution = solution;
        console.log("\tSubmitting to server...");

        let setPageStatus = function (e) {
          "string" == typeof e
            ? (document.getElementById("status").innerHTML = `<p>${e}</p>`)
            : "error" in e
            ? (console.log(
                `Error received in reply to server:\n\t${e.error}`
              ),
              (document.getElementById("status").innerHTML =
                "<p>Received a client error in reply. Please try again.</p>"))
            : (console.log(`Incomprehensible reply:\n\t${e}`),
              (document.getElementById("status").innerHTML = "<p>Received a server error in reply. This issue may be temporary. Try again.</p>")),

          document.getElementById("loader").setAttribute("class", "paused");
          let t = document.querySelectorAll("#loader circle");
          for (let e = 0; e < t.length; ++e) t[e].style = "opacity: 1 !important; fill: #a66b5e !important;";
        };

        let statusSuccess = function (e) {
          window.localStorage.setItem("sssg_clearance", "PAUSE");
          document.getElementById("status").innerHTML = "<p>Work accepted! Validating session...</p>";
          document.getElementById("loader").setAttribute("class", "paused");

          let t = document.querySelectorAll("#loader circle");
          for (let e = 0; e < t.length; ++e) t[e].style = "fill: #6ba65e !important;";

          var XMLHttpReq1 = new XMLHttpRequest();

          XMLHttpReq1.onreadystatechange = function () {
            if (XMLHttpReq1.readyState === 4)
              try {
                var e = JSON.parse(XMLHttpReq1.response);
                "auth" in e ? reloadPage(e) : setPageStatus(e);
              } catch (e) {
                setPageStatus("Server responded with an error."),
                  console.log(`Bad Json: ${XMLHttpReq1.response}`),
                  console.log(e);
              }
          }

          XMLHttpReq1.open("POST", "/.sssg/api/check", !0);

          XMLHttpReq1.setRequestHeader(
            "Content-type",
            "application/x-www-form-urlencoded"
          );

          XMLHttpReq1.send(`f=${e.auth}`);
        };

        let reloadPage = function (e) {
          window.localStorage.setItem("sssg_clearance", e.auth);
          document.getElementById("status").innerHTML = "<p>All done! Reloading page...</p>";
          document.getElementById("loader").setAttribute("class", "paused");
          let t = document.querySelectorAll("#loader circle");
          for (let e = 0; e < t.length; ++e) t[e].style = "opacity: 1 !important; fill: #6ba65e !important;";

          setTimeout(function () {location.reload();}, 1500);
        };

        var XMLHttpReq2 = new XMLHttpRequest();

        (XMLHttpReq2.onreadystatechange = function () {
          if (4 === XMLHttpReq2.readyState)
            try {
              var e = JSON.parse(XMLHttpReq2.response);
              "auth" in e ? statusSuccess(e) : setPageStatus(e);
            } catch (e) {
              setPageStatus("Server responded with an error."),
                console.log(`Bad Json: ${XMLHttpReq2.response}`),
                console.log(e);
            }
        }),
          XMLHttpReq2.open("POST", "/.sssg/api/answer", !0),
          XMLHttpReq2.setRequestHeader(
            "Content-type",
            "application/x-www-form-urlencoded"
          ),
          XMLHttpReq2.send(`a=${hashString}&b=${attempt}`);
      }
    }
  );
}