Return channel_updates when failing a HTLC for fee/CLTV reasons
[rust-lightning] / src / ln / channelmonitor.rs
index 00b348002dd3faf9a63f4e6c458b088c161eda01..ffc9ed26fdaa60a0f81375ce88588f2f4aa8f18d 100644 (file)
@@ -92,9 +92,12 @@ impl<Key : Send + cmp::Eq + hash::Hash + 'static> SimpleManyChannelMonitor<Key>
                        Some(orig_monitor) => return orig_monitor.insert_combine(monitor),
                        None => {}
                };
-               match monitor.funding_txo {
-                       None => self.chain_monitor.watch_all_txn(),
-                       Some(outpoint) => self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32)),
+               match &monitor.funding_txo {
+                       &None => self.chain_monitor.watch_all_txn(),
+                       &Some((ref outpoint, ref script)) => {
+                               self.chain_monitor.install_watch_script(script);
+                               self.chain_monitor.install_watch_outpoint((outpoint.txid, outpoint.index as u32), script);
+                       },
                }
                monitors.insert(key, monitor);
                Ok(())
@@ -147,7 +150,7 @@ const SERIALIZATION_VERSION: u8 = 1;
 const MIN_SERIALIZATION_VERSION: u8 = 1;
 
 pub struct ChannelMonitor {
-       funding_txo: Option<OutPoint>,
+       funding_txo: Option<(OutPoint, Script)>,
        commitment_transaction_number_obscure_factor: u64,
 
        key_storage: KeyStorage,
@@ -316,7 +319,7 @@ impl ChannelMonitor {
                for i in 0..pos {
                        let (old_secret, old_idx) = self.old_secrets[i as usize];
                        if ChannelMonitor::derive_secret(secret, pos, old_idx) != old_secret {
-                               return Err(HandleError{err: "Previous secret did not match new one", msg: None})
+                               return Err(HandleError{err: "Previous secret did not match new one", action: None})
                        }
                }
                self.old_secrets[pos as usize] = (secret, idx);
@@ -419,13 +422,14 @@ impl ChannelMonitor {
        }
 
        pub fn insert_combine(&mut self, mut other: ChannelMonitor) -> Result<(), HandleError> {
-               match self.funding_txo {
-                       Some(txo) => if other.funding_txo.is_some() && other.funding_txo.unwrap() != txo {
-                               return Err(HandleError{err: "Funding transaction outputs are not identical!", msg: None});
-                       },
-                       None => if other.funding_txo.is_some() {
-                               self.funding_txo = other.funding_txo;
+               if self.funding_txo.is_some() {
+                       // We should be able to compare the entire funding_txo, but in fuzztarget its trivially
+                       // easy to collide the funding_txo hash and have a different scriptPubKey.
+                       if other.funding_txo.is_some() && other.funding_txo.as_ref().unwrap().0 != self.funding_txo.as_ref().unwrap().0 {
+                               return Err(HandleError{err: "Funding transaction outputs are not identical!", action: None});
                        }
+               } else {
+                       self.funding_txo = other.funding_txo.take();
                }
                let other_min_secret = other.get_min_seen_secret();
                let our_min_secret = self.get_min_seen_secret();
@@ -458,7 +462,8 @@ impl ChannelMonitor {
        /// optional, without it this monitor cannot be used in an SPV client, but you may wish to
        /// avoid this (or call unset_funding_info) on a monitor you wish to send to a watchtower as it
        /// provides slightly better privacy.
-       pub(super) fn set_funding_info(&mut self, funding_info: OutPoint) {
+       pub(super) fn set_funding_info(&mut self, funding_info: (OutPoint, Script)) {
+               //TODO: Need to register the given script here with a chain_monitor
                self.funding_txo = Some(funding_info);
        }
 
@@ -475,7 +480,10 @@ impl ChannelMonitor {
        }
 
        pub fn get_funding_txo(&self) -> Option<OutPoint> {
-               self.funding_txo
+               match self.funding_txo {
+                       Some((outpoint, _)) => Some(outpoint),
+                       None => None
+               }
        }
 
        /// Serializes into a vec, with various modes for the exposed pub fns
@@ -484,12 +492,14 @@ impl ChannelMonitor {
                res.push(SERIALIZATION_VERSION);
                res.push(MIN_SERIALIZATION_VERSION);
 
-               match self.funding_txo {
-                       Some(outpoint) => {
+               match &self.funding_txo {
+                       &Some((ref outpoint, ref script)) => {
                                res.extend_from_slice(&outpoint.txid[..]);
                                res.extend_from_slice(&byte_utils::be16_to_array(outpoint.index));
+                               res.extend_from_slice(&byte_utils::be64_to_array(script.len() as u64));
+                               res.extend_from_slice(&script[..]);
                        },
-                       None => {
+                       &None => {
                                // We haven't even been initialized...not sure why anyone is serializing us, but
                                // not much to give them.
                                return res;
@@ -664,10 +674,12 @@ impl ChannelMonitor {
 
                // Technically this can fail and serialize fail a round-trip, but only for serialization of
                // barely-init'd ChannelMonitors that we can't do anything with.
-               let funding_txo = Some(OutPoint {
+               let outpoint = OutPoint {
                        txid: Sha256dHash::from(read_bytes!(32)),
                        index: byte_utils::slice_to_be16(read_bytes!(2)),
-               });
+               };
+               let script_len = byte_utils::slice_to_be64(read_bytes!(8));
+               let funding_txo = Some((outpoint, Script::from(read_bytes!(script_len).to_vec())));
                let commitment_transaction_number_obscure_factor = byte_utils::slice_to_be48(read_bytes!(6));
 
                let key_storage = match read_bytes!(1)[0] {
@@ -733,7 +745,7 @@ impl ChannelMonitor {
                for _ in 0..remote_claimable_outpoints_len {
                        let txid = Sha256dHash::from(read_bytes!(32));
                        let outputs_count = byte_utils::slice_to_be64(read_bytes!(8));
-                       if outputs_count > data.len() as u64 * 32 { return None; }
+                       if outputs_count > data.len() as u64 / 32 { return None; }
                        let mut outputs = Vec::with_capacity(outputs_count as usize);
                        for _ in 0..outputs_count {
                                outputs.push(read_htlc_in_commitment!());
@@ -875,7 +887,7 @@ impl ChannelMonitor {
                        }
                }
                assert!(idx < self.get_min_seen_secret());
-               Err(HandleError{err: "idx too low", msg: None})
+               Err(HandleError{err: "idx too low", action: None})
        }
 
        pub fn get_min_seen_secret(&self) -> u64 {
@@ -1026,7 +1038,7 @@ impl ChannelMonitor {
 
                        if !inputs.is_empty() || !txn_to_broadcast.is_empty() { // ie we're confident this is actually ours
                                // We're definitely a remote commitment transaction!
-                               // TODO: Register commitment_txid with the ChainWatchInterface!
+                               // TODO: Register all outputs in commitment_tx with the ChainWatchInterface!
                                self.remote_commitment_txn_on_chain.lock().unwrap().insert(commitment_txid, commitment_number);
                        }
                        if inputs.is_empty() { return txn_to_broadcast; } // Nothing to be done...probably a false positive/local tx
@@ -1059,6 +1071,7 @@ impl ChannelMonitor {
                        // already processed the block, resulting in the remote_commitment_txn_on_chain entry
                        // not being generated by the above conditional. Thus, to be safe, we go ahead and
                        // insert it here.
+                       // TODO: Register all outputs in commitment_tx with the ChainWatchInterface!
                        self.remote_commitment_txn_on_chain.lock().unwrap().insert(commitment_txid, commitment_number);
 
                        if let Some(revocation_points) = self.their_cur_revocation_points {
@@ -1232,7 +1245,7 @@ impl ChannelMonitor {
        fn block_connected(&self, txn_matched: &[&Transaction], height: u32, broadcaster: &BroadcasterInterface) {
                for tx in txn_matched {
                        for txin in tx.input.iter() {
-                               if self.funding_txo.is_none() || (txin.prev_hash == self.funding_txo.unwrap().txid && txin.prev_index == self.funding_txo.unwrap().index as u32) {
+                               if self.funding_txo.is_none() || (txin.prev_hash == self.funding_txo.as_ref().unwrap().0.txid && txin.prev_index == self.funding_txo.as_ref().unwrap().0.index as u32) {
                                        let mut txn = self.check_spend_remote_transaction(tx, height);
                                        if txn.is_empty() {
                                                txn = self.check_spend_local_transaction(tx, height);
@@ -1278,10 +1291,10 @@ impl ChannelMonitor {
 
 #[cfg(test)]
 mod tests {
-       use bitcoin::util::misc::hex_bytes;
        use bitcoin::blockdata::script::Script;
        use bitcoin::blockdata::transaction::Transaction;
        use crypto::digest::Digest;
+       use hex;
        use ln::channelmonitor::ChannelMonitor;
        use ln::chan_utils::{HTLCOutputInCommitment, TxCreationKeys};
        use util::sha2::Sha256;
@@ -1314,42 +1327,42 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
                        monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
                        monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
                        monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
                }
@@ -1360,12 +1373,12 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1376,22 +1389,22 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1402,22 +1415,22 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1428,42 +1441,42 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("02a40c85b6f28da08dfdbe0926c53fab2de6d28c10301f8f7c4073d5e42e3148").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("dddc3a8d14fddf2b68fa8c7fbad2748274937479dd0f8930d5ebb4ab6bd866a3").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c51a18b13e8527e579ec56365482c62f180b7d5760b46e9477dae59e87ed423a").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("ba65d7b0ef55a3ba300d4e87af29868f394f8f138d78a7011669c79b37b936f4").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("ba65d7b0ef55a3ba300d4e87af29868f394f8f138d78a7011669c79b37b936f4").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
                        monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
                        monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1474,32 +1487,32 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1510,42 +1523,42 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("631373ad5f9ef654bb3dade742d09504c567edd24320d2fcd68e3cc47e2ff6a6").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("b7e76a83668bde38b373970155c868a653304308f9896692f904a23731224bb1").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("b7e76a83668bde38b373970155c868a653304308f9896692f904a23731224bb1").unwrap());
                        monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
                        monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1556,42 +1569,42 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
                        monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("e7971de736e01da8ed58b94c2fc216cb1dca9e326f3a96e7194fe8ea8af6c0a3").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("e7971de736e01da8ed58b94c2fc216cb1dca9e326f3a96e7194fe8ea8af6c0a3").unwrap());
                        monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("05cde6323d949933f7f7b78776bcc1ea6d9b31447732e3802e1f7ac44b650e17").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1602,42 +1615,42 @@ mod tests {
                        secrets.clear();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                        monitor.provide_secret(281474976710655, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                        monitor.provide_secret(281474976710654, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                        monitor.provide_secret(281474976710653, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                        monitor.provide_secret(281474976710652, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("c65716add7aa98ba7acb236352d665cab17345fe45b55fb879ff80e6bd0c41dd").unwrap());
                        monitor.provide_secret(281474976710651, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("969660042a28f32d9be17344e09374b379962d03db1574df5a8a5a47e19ce3f2").unwrap());
                        monitor.provide_secret(281474976710650, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a5a64476122ca0925fb344bdc1854c1c0a59fc614298e50a33e331980a220f32").unwrap());
                        monitor.provide_secret(281474976710649, secrets.last().unwrap().clone(), None).unwrap();
                        test_secrets!();
 
                        secrets.push([0; 32]);
-                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex_bytes("a7efbc61aac46d34f77778bac22c8a20c6a46ca460addc49009bda875ec88fa4").unwrap());
+                       secrets.last_mut().unwrap()[0..32].clone_from_slice(&hex::decode("a7efbc61aac46d34f77778bac22c8a20c6a46ca460addc49009bda875ec88fa4").unwrap());
                        assert_eq!(monitor.provide_secret(281474976710648, secrets.last().unwrap().clone(), None).unwrap_err().err,
                                        "Previous secret did not match new one");
                }
@@ -1646,7 +1659,7 @@ mod tests {
        #[test]
        fn test_prune_preimages() {
                let secp_ctx = Secp256k1::new();
-               let dummy_sig = Signature::from_der(&secp_ctx, &hex_bytes("3045022100fa86fa9a36a8cd6a7bb8f06a541787d51371d067951a9461d5404de6b928782e02201c8b7c334c10aed8976a3a465be9a28abff4cb23acbf00022295b378ce1fa3cd").unwrap()[..]).unwrap();
+               let dummy_sig = Signature::from_der(&secp_ctx, &hex::decode("3045022100fa86fa9a36a8cd6a7bb8f06a541787d51371d067951a9461d5404de6b928782e02201c8b7c334c10aed8976a3a465be9a28abff4cb23acbf00022295b378ce1fa3cd").unwrap()[..]).unwrap();
 
                macro_rules! dummy_keys {
                        () => {
@@ -1727,14 +1740,14 @@ mod tests {
 
                // Now provide a secret, pruning preimages 10-15
                let mut secret = [0; 32];
-               secret[0..32].clone_from_slice(&hex_bytes("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
+               secret[0..32].clone_from_slice(&hex::decode("7cc854b54e3e0dcdb010d7a3fee464a9687be6e8db3be6854c475621e007a5dc").unwrap());
                monitor.provide_secret(281474976710655, secret.clone(), None).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 15);
                test_preimages_exist!(&preimages[0..10], monitor);
                test_preimages_exist!(&preimages[15..20], monitor);
 
                // Now provide a further secret, pruning preimages 15-17
-               secret[0..32].clone_from_slice(&hex_bytes("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
+               secret[0..32].clone_from_slice(&hex::decode("c7518c8ae4660ed02894df8976fa1a3659c1a8b4b5bec0c4b872abeba4cb8964").unwrap());
                monitor.provide_secret(281474976710654, secret.clone(), None).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 13);
                test_preimages_exist!(&preimages[0..10], monitor);
@@ -1743,7 +1756,7 @@ mod tests {
                // Now update local commitment tx info, pruning only element 18 as we still care about the
                // previous commitment tx's preimages too
                monitor.provide_latest_local_commitment_tx_info(dummy_tx.clone(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..5]));
-               secret[0..32].clone_from_slice(&hex_bytes("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
+               secret[0..32].clone_from_slice(&hex::decode("2273e227a5b7449b6e70f1fb4652864038b1cbf9cd7c043a7d6456b7fc275ad8").unwrap());
                monitor.provide_secret(281474976710653, secret.clone(), None).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 12);
                test_preimages_exist!(&preimages[0..10], monitor);
@@ -1751,7 +1764,7 @@ mod tests {
 
                // But if we do it again, we'll prune 5-10
                monitor.provide_latest_local_commitment_tx_info(dummy_tx.clone(), dummy_keys!(), 0, preimages_to_local_htlcs!(preimages[0..3]));
-               secret[0..32].clone_from_slice(&hex_bytes("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
+               secret[0..32].clone_from_slice(&hex::decode("27cddaa5624534cb6cb9d7da077cf2b22ab21e9b506fd4998a51d54502e99116").unwrap());
                monitor.provide_secret(281474976710652, secret.clone(), None).unwrap();
                assert_eq!(monitor.payment_preimages.len(), 5);
                test_preimages_exist!(&preimages[0..5], monitor);