X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fsign%2Fmod.rs;h=39f1001c480fd45926aed14355d78068028bfdc5;hb=9b1b724dad71b5a7ffbc76b1350c98a5a5130d44;hp=9a30253049d1bf0816626377ce0c258e568db7e9;hpb=3299d88595d6014dafa6f897a970330ee734e104;p=rust-lightning

diff --git a/lightning/src/sign/mod.rs b/lightning/src/sign/mod.rs
index 9a302530..39f1001c 100644
--- a/lightning/src/sign/mod.rs
+++ b/lightning/src/sign/mod.rs
@@ -134,6 +134,22 @@ pub struct StaticPaymentOutputDescriptor {
 	pub channel_transaction_parameters: Option<ChannelTransactionParameters>,
 }
 impl StaticPaymentOutputDescriptor {
+	/// Returns the `witness_script` of the spendable output.
+	///
+	/// Note that this will only return `Some` for [`StaticPaymentOutputDescriptor`]s that
+	/// originated from an anchor outputs channel, as they take the form of a P2WSH script.
+	pub fn witness_script(&self) -> Option<Script> {
+		self.channel_transaction_parameters.as_ref()
+			.and_then(|channel_params|
+				 if channel_params.channel_type_features.supports_anchors_zero_fee_htlc_tx() {
+					let payment_point = channel_params.holder_pubkeys.payment_point;
+					Some(chan_utils::get_to_countersignatory_with_anchors_redeemscript(&payment_point))
+				 } else {
+					 None
+				 }
+			)
+	}
+
 	/// The maximum length a well-formed witness spending one of these should have.
 	/// Note: If you have the grind_signatures feature enabled, this will be at least 1 byte
 	/// shorter.