From eeaed6a317d27ce7de82774291cc87bef66e6244 Mon Sep 17 00:00:00 2001
From: Donatas <contactdonatas@gmail.com>
Date: Thu, 20 Mar 2025 22:20:53 +0200
Subject: [PATCH] fix: no duplicate work when exceeding hardcoded int (#36)

* fix: no duplicate work when exceeding that 1xxx number

* run go generate and update CHANGELOG

Signed-off-by: Xe Iaso <me@xeiaso.net>

---------

Signed-off-by: Xe Iaso <me@xeiaso.net>
Co-authored-by: Xe Iaso <me@xeiaso.net>
---
 cmd/anubis/js/proof-of-work.mjs   |  12 +++++++-----
 cmd/anubis/static/js/main.mjs     |   2 +-
 cmd/anubis/static/js/main.mjs.br  | Bin 993 -> 992 bytes
 cmd/anubis/static/js/main.mjs.gz  | Bin 1193 -> 1194 bytes
 cmd/anubis/static/js/main.mjs.map |   4 ++--
 cmd/anubis/static/js/main.mjs.zst | Bin 1191 -> 1190 bytes
 docs/docs/CHANGELOG.md            |   1 +
 7 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/cmd/anubis/js/proof-of-work.mjs b/cmd/anubis/js/proof-of-work.mjs
index bd69c71..5a5f9f9 100644
--- a/cmd/anubis/js/proof-of-work.mjs
+++ b/cmd/anubis/js/proof-of-work.mjs
@@ -25,7 +25,8 @@ export function process(data, difficulty = 5, threads = navigator.hardwareConcur
       worker.postMessage({
         data,
         difficulty,
-        nonce: 1000000 * i,
+        nonce: i,
+        threads,
       });
 
       workers.push(worker);
@@ -52,10 +53,11 @@ function processTask() {
       let data = event.data.data;
       let difficulty = event.data.difficulty;
       let hash;
-      let nonce = event.data.nonce || 0;
+      let nonce = event.data.nonce;
+      let threads = event.data.threads;
 
       while (true) {
-        const currentHash = await sha256(data + nonce++);
+        const currentHash = await sha256(data + nonce);
         const thisHash = new Uint8Array(currentHash);
         let valid = true;
 
@@ -76,9 +78,9 @@ function processTask() {
           console.log(hash);
           break;
         }
-      }
 
-      nonce -= 1; // last nonce was post-incremented
+        nonce += threads;
+      }
 
       postMessage({
         hash,
diff --git a/cmd/anubis/static/js/main.mjs b/cmd/anubis/static/js/main.mjs
index 3d9e2d0..ffa524b 100644
--- a/cmd/anubis/static/js/main.mjs
+++ b/cmd/anubis/static/js/main.mjs
@@ -1,2 +1,2 @@
-(()=>{function m(n,i=5,e=navigator.hardwareConcurrency){return new Promise((t,d)=>{let s=URL.createObjectURL(new Blob(["(",p(),")()"],{type:"application/javascript"})),a=[];for(let u=0;u<e;u++){let o=new Worker(s);o.onmessage=r=>{a.forEach(c=>c.terminate()),o.terminate(),t(r.data)},o.onerror=r=>{o.terminate(),d()},o.postMessage({data:n,difficulty:i,nonce:1e6*u}),a.push(o)}URL.revokeObjectURL(s)})}function p(){return function(){let n=e=>{let t=new TextEncoder().encode(e);return crypto.subtle.digest("SHA-256",t.buffer)};function i(e){return Array.from(e).map(t=>t.toString(16).padStart(2,"0")).join("")}addEventListener("message",async e=>{let t=e.data.data,d=e.data.difficulty,s,a=e.data.nonce||0;for(;;){let u=await n(t+a++),o=new Uint8Array(u),r=!0;for(let c=0;c<d;c++){let l=Math.floor(c/2),f=c%2;if((o[l]>>(f===0?4:0)&15)!==0){r=!1;break}}if(r){s=i(o),console.log(s);break}}a-=1,postMessage({hash:s,data:t,difficulty:d,nonce:a})})}.toString()}var w=(n="",i={})=>{let e=new URL(n,window.location.href);return Object.entries(i).forEach(t=>{let[d,s]=t;e.searchParams.set(d,s)}),e.toString()},h=(n,i)=>w(`/.within.website/x/cmd/anubis/static/img/${n}.webp`,{cacheBuster:i});(async()=>{let n=document.getElementById("status"),i=document.getElementById("image"),e=document.getElementById("title"),t=document.getElementById("spinner"),d=JSON.parse(document.getElementById("anubis_version").textContent);n.innerHTML="Calculating...";let{challenge:s,difficulty:a}=await fetch("/.within.website/x/cmd/anubis/api/make-challenge",{method:"POST"}).then(l=>{if(!l.ok)throw new Error("Failed to fetch config");return l.json()}).catch(l=>{throw e.innerHTML="Oh no!",n.innerHTML=`Failed to fetch config: ${l.message}`,i.src=h("sad"),t.innerHTML="",t.style.display="none",l});n.innerHTML=`Calculating...<br/>Difficulty: ${a}`;let u=Date.now(),{hash:o,nonce:r}=await m(s,a),c=Date.now();console.log({hash:o,nonce:r}),e.innerHTML="Success!",n.innerHTML=`Done! Took ${c-u}ms, ${r} iterations`,i.src=h("happy",d),t.innerHTML="",t.style.display="none",setTimeout(()=>{let l=window.location.href;window.location.href=w("/.within.website/x/cmd/anubis/api/pass-challenge",{response:o,nonce:r,redir:l,elapsedTime:c-u})},250)})();})();
+(()=>{function m(n,s=5,e=navigator.hardwareConcurrency){return new Promise((t,l)=>{let a=URL.createObjectURL(new Blob(["(",g(),")()"],{type:"application/javascript"})),r=[];for(let d=0;d<e;d++){let i=new Worker(a);i.onmessage=c=>{r.forEach(u=>u.terminate()),i.terminate(),t(c.data)},i.onerror=c=>{i.terminate(),l()},i.postMessage({data:n,difficulty:s,nonce:d,threads:e}),r.push(i)}URL.revokeObjectURL(a)})}function g(){return function(){let n=e=>{let t=new TextEncoder().encode(e);return crypto.subtle.digest("SHA-256",t.buffer)};function s(e){return Array.from(e).map(t=>t.toString(16).padStart(2,"0")).join("")}addEventListener("message",async e=>{let t=e.data.data,l=e.data.difficulty,a,r=e.data.nonce,d=e.data.threads;for(;;){let i=await n(t+r),c=new Uint8Array(i),u=!0;for(let o=0;o<l;o++){let f=Math.floor(o/2),p=o%2;if((c[f]>>(p===0?4:0)&15)!==0){u=!1;break}}if(u){a=s(c),console.log(a);break}r+=d}postMessage({hash:a,data:t,difficulty:l,nonce:r})})}.toString()}var w=(n="",s={})=>{let e=new URL(n,window.location.href);return Object.entries(s).forEach(t=>{let[l,a]=t;e.searchParams.set(l,a)}),e.toString()},h=(n,s)=>w(`/.within.website/x/cmd/anubis/static/img/${n}.webp`,{cacheBuster:s});(async()=>{let n=document.getElementById("status"),s=document.getElementById("image"),e=document.getElementById("title"),t=document.getElementById("spinner"),l=JSON.parse(document.getElementById("anubis_version").textContent);n.innerHTML="Calculating...";let{challenge:a,difficulty:r}=await fetch("/.within.website/x/cmd/anubis/api/make-challenge",{method:"POST"}).then(o=>{if(!o.ok)throw new Error("Failed to fetch config");return o.json()}).catch(o=>{throw e.innerHTML="Oh no!",n.innerHTML=`Failed to fetch config: ${o.message}`,s.src=h("sad"),t.innerHTML="",t.style.display="none",o});n.innerHTML=`Calculating...<br/>Difficulty: ${r}`;let d=Date.now(),{hash:i,nonce:c}=await m(a,r),u=Date.now();console.log({hash:i,nonce:c}),e.innerHTML="Success!",n.innerHTML=`Done! Took ${u-d}ms, ${c} iterations`,s.src=h("happy",l),t.innerHTML="",t.style.display="none",setTimeout(()=>{let o=window.location.href;window.location.href=w("/.within.website/x/cmd/anubis/api/pass-challenge",{response:i,nonce:c,redir:o,elapsedTime:u-d})},250)})();})();
 //# sourceMappingURL=main.mjs.map
diff --git a/cmd/anubis/static/js/main.mjs.br b/cmd/anubis/static/js/main.mjs.br
index 56b664638301a24f1977a8405d30958ce3469a62..a7b35e9e4029a4a8d08823b08bae3630b1ad9aa1 100644
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diff --git a/cmd/anubis/static/js/main.mjs.gz b/cmd/anubis/static/js/main.mjs.gz
index f4665eedfeaa9e2e48d7601f8549893588b60044..2bd25c4c0cd1978426c12d007f5f28bfaafe004a 100644
GIT binary patch
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diff --git a/cmd/anubis/static/js/main.mjs.map b/cmd/anubis/static/js/main.mjs.map
index 577503b..3a0d564 100644
--- a/cmd/anubis/static/js/main.mjs.map
+++ b/cmd/anubis/static/js/main.mjs.map
@@ -1,7 +1,7 @@
 {
   "version": 3,
   "sources": ["../../js/proof-of-work.mjs", "../../js/main.mjs"],
-  "sourcesContent": ["// https://dev.to/ratmd/simple-proof-of-work-in-javascript-3kgm\n\nexport function process(data, difficulty = 5, threads = navigator.hardwareConcurrency) {\n  return new Promise((resolve, reject) => {\n    let webWorkerURL = URL.createObjectURL(new Blob([\n      '(', processTask(), ')()'\n    ], { type: 'application/javascript' }));\n\n    const workers = [];\n\n    for (let i = 0; i < threads; i++) {\n      let worker = new Worker(webWorkerURL);\n\n      worker.onmessage = (event) => {\n        workers.forEach(worker => worker.terminate());\n        worker.terminate();\n        resolve(event.data);\n      };\n\n      worker.onerror = (event) => {\n        worker.terminate();\n        reject();\n      };\n\n      worker.postMessage({\n        data,\n        difficulty,\n        nonce: 1000000 * i,\n      });\n\n      workers.push(worker);\n    }\n\n    URL.revokeObjectURL(webWorkerURL);\n  });\n}\n\nfunction processTask() {\n  return function () {\n    const sha256 = (text) => {\n      const encoded = new TextEncoder().encode(text);\n      return crypto.subtle.digest(\"SHA-256\", encoded.buffer);\n    };\n\n    function uint8ArrayToHexString(arr) {\n      return Array.from(arr)\n        .map((c) => c.toString(16).padStart(2, \"0\"))\n        .join(\"\");\n    }\n\n    addEventListener('message', async (event) => {\n      let data = event.data.data;\n      let difficulty = event.data.difficulty;\n      let hash;\n      let nonce = event.data.nonce || 0;\n\n      while (true) {\n        const currentHash = await sha256(data + nonce++);\n        const thisHash = new Uint8Array(currentHash);\n        let valid = true;\n\n        for (let j = 0; j < difficulty; j++) {\n          const byteIndex = Math.floor(j / 2); // which byte we are looking at\n          const nibbleIndex = j % 2; // which nibble in the byte we are looking at (0 is high, 1 is low)\n\n          let nibble = (thisHash[byteIndex] >> (nibbleIndex === 0 ? 4 : 0)) & 0x0F; // Get the nibble\n\n          if (nibble !== 0) {\n            valid = false;\n            break;\n          }\n        }\n\n        if (valid) {\n          hash = uint8ArrayToHexString(thisHash);\n          console.log(hash);\n          break;\n        }\n      }\n\n      nonce -= 1; // last nonce was post-incremented\n\n      postMessage({\n        hash,\n        data,\n        difficulty,\n        nonce,\n      });\n    });\n  }.toString();\n}\n\n", "import { process } from './proof-of-work.mjs';\nimport { testVideo } from './video.mjs';\n\n// from Xeact\nconst u = (url = \"\", params = {}) => {\n  let result = new URL(url, window.location.href);\n  Object.entries(params).forEach((kv) => {\n    let [k, v] = kv;\n    result.searchParams.set(k, v);\n  });\n  return result.toString();\n};\n\nconst imageURL = (mood, cacheBuster) =>\n  u(`/.within.website/x/cmd/anubis/static/img/${mood}.webp`, { cacheBuster });\n\n(async () => {\n  const status = document.getElementById('status');\n  const image = document.getElementById('image');\n  const title = document.getElementById('title');\n  const spinner = document.getElementById('spinner');\n  const anubisVersion = JSON.parse(document.getElementById('anubis_version').textContent);\n\n  // const testarea = document.getElementById('testarea');\n\n  // const videoWorks = await testVideo(testarea);\n  // console.log(`videoWorks: ${videoWorks}`);\n\n  // if (!videoWorks) {\n  //   title.innerHTML = \"Oh no!\";\n  //   status.innerHTML = \"Checks failed. Please check your browser's settings and try again.\";\n  //   image.src = imageURL(\"sad\");\n  //   spinner.innerHTML = \"\";\n  //   spinner.style.display = \"none\";\n  //   return;\n  // }\n\n  status.innerHTML = 'Calculating...';\n\n  const { challenge, difficulty } = await fetch(\"/.within.website/x/cmd/anubis/api/make-challenge\", { method: \"POST\" })\n    .then(r => {\n      if (!r.ok) {\n        throw new Error(\"Failed to fetch config\");\n      }\n      return r.json();\n    })\n    .catch(err => {\n      title.innerHTML = \"Oh no!\";\n      status.innerHTML = `Failed to fetch config: ${err.message}`;\n      image.src = imageURL(\"sad\");\n      spinner.innerHTML = \"\";\n      spinner.style.display = \"none\";\n      throw err;\n    });\n\n  status.innerHTML = `Calculating...<br/>Difficulty: ${difficulty}`;\n\n  const t0 = Date.now();\n  const { hash, nonce } = await process(challenge, difficulty);\n  const t1 = Date.now();\n  console.log({ hash, nonce });\n\n  title.innerHTML = \"Success!\";\n  status.innerHTML = `Done! Took ${t1 - t0}ms, ${nonce} iterations`;\n  image.src = imageURL(\"happy\", anubisVersion);\n  spinner.innerHTML = \"\";\n  spinner.style.display = \"none\";\n\n  setTimeout(() => {\n    const redir = window.location.href;\n    window.location.href = u(\"/.within.website/x/cmd/anubis/api/pass-challenge\", { response: hash, nonce, redir, elapsedTime: t1 - t0 });\n  }, 250);\n})();"],
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+  "sourcesContent": ["// https://dev.to/ratmd/simple-proof-of-work-in-javascript-3kgm\n\nexport function process(data, difficulty = 5, threads = navigator.hardwareConcurrency) {\n  return new Promise((resolve, reject) => {\n    let webWorkerURL = URL.createObjectURL(new Blob([\n      '(', processTask(), ')()'\n    ], { type: 'application/javascript' }));\n\n    const workers = [];\n\n    for (let i = 0; i < threads; i++) {\n      let worker = new Worker(webWorkerURL);\n\n      worker.onmessage = (event) => {\n        workers.forEach(worker => worker.terminate());\n        worker.terminate();\n        resolve(event.data);\n      };\n\n      worker.onerror = (event) => {\n        worker.terminate();\n        reject();\n      };\n\n      worker.postMessage({\n        data,\n        difficulty,\n        nonce: i,\n        threads,\n      });\n\n      workers.push(worker);\n    }\n\n    URL.revokeObjectURL(webWorkerURL);\n  });\n}\n\nfunction processTask() {\n  return function () {\n    const sha256 = (text) => {\n      const encoded = new TextEncoder().encode(text);\n      return crypto.subtle.digest(\"SHA-256\", encoded.buffer);\n    };\n\n    function uint8ArrayToHexString(arr) {\n      return Array.from(arr)\n        .map((c) => c.toString(16).padStart(2, \"0\"))\n        .join(\"\");\n    }\n\n    addEventListener('message', async (event) => {\n      let data = event.data.data;\n      let difficulty = event.data.difficulty;\n      let hash;\n      let nonce = event.data.nonce;\n      let threads = event.data.threads;\n\n      while (true) {\n        const currentHash = await sha256(data + nonce);\n        const thisHash = new Uint8Array(currentHash);\n        let valid = true;\n\n        for (let j = 0; j < difficulty; j++) {\n          const byteIndex = Math.floor(j / 2); // which byte we are looking at\n          const nibbleIndex = j % 2; // which nibble in the byte we are looking at (0 is high, 1 is low)\n\n          let nibble = (thisHash[byteIndex] >> (nibbleIndex === 0 ? 4 : 0)) & 0x0F; // Get the nibble\n\n          if (nibble !== 0) {\n            valid = false;\n            break;\n          }\n        }\n\n        if (valid) {\n          hash = uint8ArrayToHexString(thisHash);\n          console.log(hash);\n          break;\n        }\n\n        nonce += threads;\n      }\n\n      postMessage({\n        hash,\n        data,\n        difficulty,\n        nonce,\n      });\n    });\n  }.toString();\n}\n\n", "import { process } from './proof-of-work.mjs';\nimport { testVideo } from './video.mjs';\n\n// from Xeact\nconst u = (url = \"\", params = {}) => {\n  let result = new URL(url, window.location.href);\n  Object.entries(params).forEach((kv) => {\n    let [k, v] = kv;\n    result.searchParams.set(k, v);\n  });\n  return result.toString();\n};\n\nconst imageURL = (mood, cacheBuster) =>\n  u(`/.within.website/x/cmd/anubis/static/img/${mood}.webp`, { cacheBuster });\n\n(async () => {\n  const status = document.getElementById('status');\n  const image = document.getElementById('image');\n  const title = document.getElementById('title');\n  const spinner = document.getElementById('spinner');\n  const anubisVersion = JSON.parse(document.getElementById('anubis_version').textContent);\n\n  // const testarea = document.getElementById('testarea');\n\n  // const videoWorks = await testVideo(testarea);\n  // console.log(`videoWorks: ${videoWorks}`);\n\n  // if (!videoWorks) {\n  //   title.innerHTML = \"Oh no!\";\n  //   status.innerHTML = \"Checks failed. Please check your browser's settings and try again.\";\n  //   image.src = imageURL(\"sad\");\n  //   spinner.innerHTML = \"\";\n  //   spinner.style.display = \"none\";\n  //   return;\n  // }\n\n  status.innerHTML = 'Calculating...';\n\n  const { challenge, difficulty } = await fetch(\"/.within.website/x/cmd/anubis/api/make-challenge\", { method: \"POST\" })\n    .then(r => {\n      if (!r.ok) {\n        throw new Error(\"Failed to fetch config\");\n      }\n      return r.json();\n    })\n    .catch(err => {\n      title.innerHTML = \"Oh no!\";\n      status.innerHTML = `Failed to fetch config: ${err.message}`;\n      image.src = imageURL(\"sad\");\n      spinner.innerHTML = \"\";\n      spinner.style.display = \"none\";\n      throw err;\n    });\n\n  status.innerHTML = `Calculating...<br/>Difficulty: ${difficulty}`;\n\n  const t0 = Date.now();\n  const { hash, nonce } = await process(challenge, difficulty);\n  const t1 = Date.now();\n  console.log({ hash, nonce });\n\n  title.innerHTML = \"Success!\";\n  status.innerHTML = `Done! Took ${t1 - t0}ms, ${nonce} iterations`;\n  image.src = imageURL(\"happy\", anubisVersion);\n  spinner.innerHTML = \"\";\n  spinner.style.display = \"none\";\n\n  setTimeout(() => {\n    const redir = window.location.href;\n    window.location.href = u(\"/.within.website/x/cmd/anubis/api/pass-challenge\", { response: hash, nonce, redir, elapsedTime: t1 - t0 });\n  }, 250);\n})();"],
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   "names": ["process", "data", "difficulty", "threads", "resolve", "reject", "webWorkerURL", "processTask", "workers", "i", "worker", "event", "sha256", "text", "encoded", "uint8ArrayToHexString", "arr", "c", "hash", "nonce", "currentHash", "thisHash", "valid", "j", "byteIndex", "nibbleIndex", "u", "url", "params", "result", "kv", "k", "v", "imageURL", "mood", "cacheBuster", "status", "image", "title", "spinner", "anubisVersion", "challenge", "difficulty", "r", "err", "t0", "hash", "nonce", "process", "t1", "redir"]
 }
diff --git a/cmd/anubis/static/js/main.mjs.zst b/cmd/anubis/static/js/main.mjs.zst
index 1b713784b8bf098a36a3b6bd82fb5ba450ed7d69..8903e1eca6c4fe6649031990c1963872a9eca254 100644
GIT binary patch
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diff --git a/docs/docs/CHANGELOG.md b/docs/docs/CHANGELOG.md
index 0ceaec7..5847c6e 100644
--- a/docs/docs/CHANGELOG.md
+++ b/docs/docs/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Don't duplicate work across multiple threads [#36](https://github.com/TecharoHQ/anubis/pull/36)
 - Documentation has been moved to https://anubis.techaro.lol/ with sources in docs/
 - Removed several visible AI artifacts (e.g., 6 fingers) [#37](https://github.com/TecharoHQ/anubis/pull/37)