X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Futil%2Fenforcing_trait_impls.rs;h=34b5954d48525b4555ba45b3de803b334ab24007;hb=95bb27a34d1cd2ee853a4e974e04862299333ab3;hp=b4b66e8f5feb97d52ff52be9e046b55aa71bd532;hpb=b5a63070f52dbd2a9cadaf638de3f0b3d702bee7;p=rust-lightning

diff --git a/lightning/src/util/enforcing_trait_impls.rs b/lightning/src/util/enforcing_trait_impls.rs
index b4b66e8f..34b5954d 100644
--- a/lightning/src/util/enforcing_trait_impls.rs
+++ b/lightning/src/util/enforcing_trait_impls.rs
@@ -7,6 +7,7 @@
 // You may not use this file except in accordance with one or both of these
 // licenses.
 
+use ln::channel::{ANCHOR_OUTPUT_VALUE_SATOSHI, MIN_CHAN_DUST_LIMIT_SATOSHIS};
 use ln::chan_utils::{HTLCOutputInCommitment, ChannelPublicKeys, HolderCommitmentTransaction, CommitmentTransaction, ChannelTransactionParameters, TrustedCommitmentTransaction, ClosingTransaction};
 use ln::{chan_utils, msgs, PaymentPreimage};
 use chain::keysinterface::{Sign, InMemorySigner, BaseSign};
@@ -160,7 +161,16 @@ impl BaseSign for EnforcingSigner {
 
 			let htlc_redeemscript = chan_utils::get_htlc_redeemscript(&this_htlc, self.opt_anchors(), &keys);
 
-			let sighash = hash_to_message!(&sighash::SighashCache::new(&htlc_tx).segwit_signature_hash(0, &htlc_redeemscript, this_htlc.amount_msat / 1000, EcdsaSighashType::All).unwrap()[..]);
+			let sighash_type = if self.opt_anchors() {
+				EcdsaSighashType::SinglePlusAnyoneCanPay
+			} else {
+				EcdsaSighashType::All
+			};
+			let sighash = hash_to_message!(
+				&sighash::SighashCache::new(&htlc_tx).segwit_signature_hash(
+					0, &htlc_redeemscript, this_htlc.amount_msat / 1000, sighash_type,
+				).unwrap()[..]
+			);
 			secp_ctx.verify_ecdsa(&sighash, sig, &keys.countersignatory_htlc_key).unwrap();
 		}
 
@@ -190,6 +200,16 @@ impl BaseSign for EnforcingSigner {
 		Ok(self.inner.sign_closing_transaction(closing_tx, secp_ctx).unwrap())
 	}
 
+	fn sign_holder_anchor_input(
+		&self, anchor_tx: &mut Transaction, input: usize, secp_ctx: &Secp256k1<secp256k1::All>,
+	) -> Result<Signature, ()> {
+		debug_assert!(MIN_CHAN_DUST_LIMIT_SATOSHIS > ANCHOR_OUTPUT_VALUE_SATOSHI);
+		// As long as our minimum dust limit is enforced and is greater than our anchor output
+		// value, an anchor output can only have an index within [0, 1].
+		assert!(anchor_tx.input[input].previous_output.vout == 0 || anchor_tx.input[input].previous_output.vout == 1);
+		self.inner.sign_holder_anchor_input(anchor_tx, input, secp_ctx)
+	}
+
 	fn sign_channel_announcement(&self, msg: &msgs::UnsignedChannelAnnouncement, secp_ctx: &Secp256k1<secp256k1::All>)
 	-> Result<(Signature, Signature), ()> {
 		self.inner.sign_channel_announcement(msg, secp_ctx)