From 86e7f9d4cafd1fd622e4a636ba1252e7614f21c3 Mon Sep 17 00:00:00 2001
From: conduition <conduition@proton.me>
Date: Sat, 27 Jun 2026 01:12:47 +0000
Subject: [PATCH] add new test case for duplicate script leaves

---
 .../common/tests/data/p2mr_construction.json  | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/bip-0360/ref-impl/common/tests/data/p2mr_construction.json b/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
index 8601b562..1fb08f07 100644
--- a/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
+++ b/bip-0360/ref-impl/common/tests/data/p2mr_construction.json
@@ -253,6 +253,51 @@
                     "c1737ed1fe30bc42b8022d717b44f0d93516617af64a64753b7a06bf16b26cd711f154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9d"
                 ]
             }
+        },
+        {
+            "id": "p2mr_duplicate_leaves",
+            "objective": "Ensure P2MR control blocks can be constructed correctly even when duplicate script leaves coexist in the same tree.",
+            "given": {
+                "scriptTree": [
+                    {
+                        "id": 0,
+                        "script": "2071981521ad9fc9036687364118fb6ccd2035b96a423c59c5430e98310a11abe2ac",
+                        "asm": "71981521ad9fc9036687364118fb6ccd2035b96a423c59c5430e98310a11abe2 OP_CHECKSIG",
+                        "leafVersion": 192
+                    },
+                    [
+                        {
+                            "id": 1,
+                            "script": "20d5094d2dbe9b76e2c245a2b89b6006888952e2faa6a149ae318d69e520617748ac",
+                            "asm": "d5094d2dbe9b76e2c245a2b89b6006888952e2faa6a149ae318d69e520617748 OP_CHECKSIG",
+                            "leafVersion": 192
+                        },
+                        {
+                            "id": 2,
+                            "script": "2071981521ad9fc9036687364118fb6ccd2035b96a423c59c5430e98310a11abe2ac",
+                            "asm": "71981521ad9fc9036687364118fb6ccd2035b96a423c59c5430e98310a11abe2 OP_CHECKSIG",
+                            "leafVersion": 192
+                        }
+                    ]
+                ]
+            },
+            "intermediary": {
+                "leafHashes": [
+                    "f154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9d",
+                    "737ed1fe30bc42b8022d717b44f0d93516617af64a64753b7a06bf16b26cd711",
+                    "f154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9d"
+                ],
+                "merkleRoot": "3ab4f80153012398a7df2df273b0bd3cdb839883320ff06d62e8cc1ecb351ba7"
+            },
+            "expected": {
+                "scriptPubKey": "52203ab4f80153012398a7df2df273b0bd3cdb839883320ff06d62e8cc1ecb351ba7",
+                "bip350Address": "bc1z8260sq2nqy3e3f7l9he88v9a8ndc8xyrxg8lqmtzarxpaje4rwnsxxww7h",
+                "scriptPathControlBlocks": [
+                    "c13a9adbb72f00022f76909e0f4bbab37dacafadb59618a4a13a123e13cb6f3019",
+                    "c1f154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9df154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9d",
+                    "c1737ed1fe30bc42b8022d717b44f0d93516617af64a64753b7a06bf16b26cd711f154e8e8e17c31d3462d7132589ed29353c6fafdb884c5a6e04ea938834f0d9d"
+                ]
+            }
         }
     ]
 }