From 88b35ff911a999e0b479417237010c305114ba08 Mon Sep 17 00:00:00 2001
From: bashonly <88596187+bashonly@users.noreply.github.com>
Date: Thu, 29 Jan 2026 10:47:00 -0600
Subject: [PATCH] [ie/youtube] Update ejs to 0.4.0 (#15747)

Authored by: bashonly
---
 Makefile                                      |  6 +-
 pyproject.toml                                |  2 +-
 test/test_jsc/test_ejs_integration.py         | 15 ++++
 .../youtube/jsc/_builtin/vendor/_info.py      |  6 +-
 .../jsc/_builtin/vendor/yt.solver.core.js     | 79 ++++++++++++++++---
 5 files changed, 88 insertions(+), 20 deletions(-)

diff --git a/Makefile b/Makefile
index 134408d58d..11b32ab25c 100644
--- a/Makefile
+++ b/Makefile
@@ -202,9 +202,9 @@ CONTRIBUTORS: Changelog.md
 
 # The following EJS_-prefixed variables are auto-generated by devscripts/update_ejs.py
 # DO NOT EDIT!
-EJS_VERSION = 0.3.2
-EJS_WHEEL_NAME = yt_dlp_ejs-0.3.2-py3-none-any.whl
-EJS_WHEEL_HASH = sha256:f2dc6b3d1b909af1f13e021621b0af048056fca5fb07c4db6aa9bbb37a4f66a9
+EJS_VERSION = 0.4.0
+EJS_WHEEL_NAME = yt_dlp_ejs-0.4.0-py3-none-any.whl
+EJS_WHEEL_HASH = sha256:19278cff397b243074df46342bb7616c404296aeaff01986b62b4e21823b0b9c
 EJS_PY_FOLDERS = yt_dlp_ejs yt_dlp_ejs/yt yt_dlp_ejs/yt/solver
 EJS_PY_FILES = yt_dlp_ejs/__init__.py yt_dlp_ejs/_version.py yt_dlp_ejs/yt/__init__.py yt_dlp_ejs/yt/solver/__init__.py
 EJS_JS_FOLDERS = yt_dlp_ejs/yt/solver
diff --git a/pyproject.toml b/pyproject.toml
index f29b3cba81..b5642fddc9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -55,7 +55,7 @@ default = [
     "requests>=2.32.2,<3",
     "urllib3>=2.0.2,<3",
     "websockets>=13.0",
-    "yt-dlp-ejs==0.3.2",
+    "yt-dlp-ejs==0.4.0",
 ]
 curl-cffi = [
     "curl-cffi>=0.5.10,!=0.6.*,!=0.7.*,!=0.8.*,!=0.9.*,<0.15; implementation_name=='cpython'",
diff --git a/test/test_jsc/test_ejs_integration.py b/test/test_jsc/test_ejs_integration.py
index 7984810794..f4c04a58c7 100644
--- a/test/test_jsc/test_ejs_integration.py
+++ b/test/test_jsc/test_ejs_integration.py
@@ -88,6 +88,21 @@ CHALLENGES: list[Challenge] = [
         'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt':
             'MhudCuAuP-6fByOk1_GNXN7gNHHShjyXS2VOgsEItAJz0tipeav0OmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt',
     }),
+    # c1c87fb0: tce variant broke sig solving; n and main variant are added only for regression testing
+    Challenge('c1c87fb0', Variant.main, JsChallengeType.N, {
+        'ZdZIqFPQK-Ty8wId': 'jCHBK5GuAFNa2',
+    }),
+    Challenge('c1c87fb0', Variant.main, JsChallengeType.SIG, {
+        'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt':
+            'ttJC2JfQdSswRAIgGBCxZyAfKyi0cjXCb3DqEctUw-NYdNmOEvaepit0zJAtIEsgOV2SXZjhSHMNy0NXNGa1kOyBf6HPuAuCduh-_',
+    }),
+    Challenge('c1c87fb0', Variant.tce, JsChallengeType.N, {
+        'ZdZIqFPQK-Ty8wId': 'jCHBK5GuAFNa2',
+    }),
+    Challenge('c1c87fb0', Variant.tce, JsChallengeType.SIG, {
+        'gN7a-hudCuAuPH6fByOk1_GNXN0yNMHShjZXS2VOgsEItAJz0tipeavEOmNdYN-wUtcEqD3bCXjc0iyKfAyZxCBGgIARwsSdQfJ2CJtt':
+            'ttJC2JfQdSswRAIgGBCxZyAfKyi0cjXCb3DqEctUw-NYdNmOEvaepit0zJAtIEsgOV2SXZjhSHMNy0NXNGa1kOyBf6HPuAuCduh-_',
+    }),
 ]
 
 requests: list[JsChallengeRequest] = []
diff --git a/yt_dlp/extractor/youtube/jsc/_builtin/vendor/_info.py b/yt_dlp/extractor/youtube/jsc/_builtin/vendor/_info.py
index 5e42ce3e50..14c867c86f 100644
--- a/yt_dlp/extractor/youtube/jsc/_builtin/vendor/_info.py
+++ b/yt_dlp/extractor/youtube/jsc/_builtin/vendor/_info.py
@@ -1,10 +1,10 @@
 # This file is generated by devscripts/update_ejs.py. DO NOT MODIFY!
 
-VERSION = '0.3.2'
+VERSION = '0.4.0'
 HASHES = {
     'yt.solver.bun.lib.js': '6ff45e94de9f0ea936a183c48173cfa9ce526ee4b7544cd556428427c1dd53c8073ef0174e79b320252bf0e7c64b0032cc1cf9c4358f3fda59033b7caa01c241',
-    'yt.solver.core.js': '0cd96b2d3f319dfa62cae689efa7d930ef1706e95f5921794db5089b2262957ec0a17d73938d8975ea35d0309cbfb4c8e4418d5e219837215eee242890c8b64d',
-    'yt.solver.core.min.js': '370d627703002b4a73b10027702734a3de9484f6b56b739942be1dc2b60fee49dee2aa86ed117d1c8ae1ac55181d326481f1fe2e2e8d5211154d48e2a55dac51',
+    'yt.solver.core.js': '05964b458d92a65d4fb7a90bcb5921c9fed2370f4e4f2f25badb41f28aff9069e0b3c4e5bf1baf2d3021787b67fc6093cefa44de30cffdc6f9fb25532484003b',
+    'yt.solver.core.min.js': '0cd3c0b37e095d3cca99443b58fe03980ac3bf2e777c2485c23e1f6052b5ede9f07c7f1c79a9c3af3258ea91a228f099741e7eb07b53125b5dcc84bb4c0054f3',
     'yt.solver.deno.lib.js': '9c8ee3ab6c23e443a5a951e3ac73c6b8c1c8fb34335e7058a07bf99d349be5573611de00536dcd03ecd3cf34014c4e9b536081de37af3637c5390c6a6fd6a0f0',
     'yt.solver.lib.js': '1ee3753a8222fc855f5c39db30a9ccbb7967dbe1fb810e86dc9a89aa073a0907f294c720e9b65427d560a35aa1ce6af19ef854d9126a05ca00afe03f72047733',
     'yt.solver.lib.min.js': '8420c259ad16e99ce004e4651ac1bcabb53b4457bf5668a97a9359be9a998a789fee8ab124ee17f91a2ea8fd84e0f2b2fc8eabcaf0b16a186ba734cf422ad053',
diff --git a/yt_dlp/extractor/youtube/jsc/_builtin/vendor/yt.solver.core.js b/yt_dlp/extractor/youtube/jsc/_builtin/vendor/yt.solver.core.js
index 1cfa0d6a6e..ee167fe163 100644
--- a/yt_dlp/extractor/youtube/jsc/_builtin/vendor/yt.solver.core.js
+++ b/yt_dlp/extractor/youtube/jsc/_builtin/vendor/yt.solver.core.js
@@ -60,6 +60,26 @@ var jsc = (function (meriyah, astring) {
     }
     return value;
   }
+  const nsigExpression = {
+    type: 'VariableDeclaration',
+    kind: 'var',
+    declarations: [
+      {
+        type: 'VariableDeclarator',
+        init: {
+          type: 'CallExpression',
+          callee: { type: 'Identifier' },
+          arguments: [
+            { type: 'Literal' },
+            {
+              type: 'CallExpression',
+              callee: { type: 'Identifier', name: 'decodeURIComponent' },
+            },
+          ],
+        },
+      },
+    ],
+  };
   const logicalExpression = {
     type: 'ExpressionStatement',
     expression: {
@@ -186,24 +206,57 @@ var jsc = (function (meriyah, astring) {
       'call',
       (_8) => _8(-2),
     ]);
-    if (!matchesStructure(relevantExpression, logicalExpression)) {
-      return null;
-    }
-    if (
+    let call = null;
+    if (matchesStructure(relevantExpression, logicalExpression)) {
+      if (
+        _optionalChain$2([
+          relevantExpression,
+          'optionalAccess',
+          (_9) => _9.type,
+        ]) !== 'ExpressionStatement' ||
+        relevantExpression.expression.type !== 'LogicalExpression' ||
+        relevantExpression.expression.right.type !== 'SequenceExpression' ||
+        relevantExpression.expression.right.expressions[0].type !==
+          'AssignmentExpression' ||
+        relevantExpression.expression.right.expressions[0].right.type !==
+          'CallExpression'
+      ) {
+        return null;
+      }
+      call = relevantExpression.expression.right.expressions[0].right;
+    } else if (
       _optionalChain$2([
         relevantExpression,
         'optionalAccess',
-        (_9) => _9.type,
-      ]) !== 'ExpressionStatement' ||
-      relevantExpression.expression.type !== 'LogicalExpression' ||
-      relevantExpression.expression.right.type !== 'SequenceExpression' ||
-      relevantExpression.expression.right.expressions[0].type !==
-        'AssignmentExpression'
+        (_10) => _10.type,
+      ]) === 'IfStatement' &&
+      relevantExpression.consequent.type === 'BlockStatement'
     ) {
-      return null;
+      for (const n of relevantExpression.consequent.body) {
+        if (!matchesStructure(n, nsigExpression)) {
+          continue;
+        }
+        if (
+          n.type !== 'VariableDeclaration' ||
+          _optionalChain$2([
+            n,
+            'access',
+            (_11) => _11.declarations,
+            'access',
+            (_12) => _12[0],
+            'access',
+            (_13) => _13.init,
+            'optionalAccess',
+            (_14) => _14.type,
+          ]) !== 'CallExpression'
+        ) {
+          continue;
+        }
+        call = n.declarations[0].init;
+        break;
+      }
     }
-    const call = relevantExpression.expression.right.expressions[0].right;
-    if (call.type !== 'CallExpression' || call.callee.type !== 'Identifier') {
+    if (call === null) {
       return null;
     }
     return {