From 5d2fdc809e793dd5c144b584a8915329232f0551 Mon Sep 17 00:00:00 2001
From: conduition <conduition@proton.me>
Date: Thu, 29 Feb 2024 05:23:18 +0000
Subject: [PATCH] funding script pubkey doesn't need to commit to an empty
 taproot

---
 src/spend_info/funding.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/spend_info/funding.rs b/src/spend_info/funding.rs
index 30f4033..0cc67f6 100644
--- a/src/spend_info/funding.rs
+++ b/src/spend_info/funding.rs
@@ -44,11 +44,11 @@ impl FundingSpendInfo {
 
     /// Returns the TX locking script for funding the ticketed DLC multisig.
     pub(crate) fn script_pubkey(&self) -> ScriptBuf {
-        ScriptBuf::new_p2tr(
-            secp256k1::SECP256K1,
-            self.key_agg_ctx.aggregated_pubkey(),
-            None,
-        )
+        // This is safe because the musig key aggregation formula prevents
+        // participants from hiding tapscript commitments in the aggregated key.
+        let (xonly, _) = self.key_agg_ctx.aggregated_pubkey();
+        let tweaked = bitcoin::key::TweakedPublicKey::dangerous_assume_tweaked(xonly);
+        ScriptBuf::new_p2tr_tweaked(tweaked)
     }
 
     /// Compute the signature hash for a given outcome transaction.