Add init height in ChannelManager constructor
[rust-lightning] / fuzz / fuzz_targets / full_stack_target.rs
index 9ce82aeb02dae9d07856aa0330c43062c0200aa1..29220f46846a5d8063ff350cb0943d35d798d37c 100644 (file)
@@ -1,27 +1,41 @@
+//! Test that no series of bytes received over the wire/connections created/payments sent can
+//! result in a crash. We do this by standing up a node and then reading bytes from input to denote
+//! actions such as creating new inbound/outbound connections, bytes to be read from a connection,
+//! or payments to send/ways to handle events generated.
+//! This test has been very useful, though due to its complexity good starting inputs are critical.
+
+//Uncomment this for libfuzzer builds:
+//#![no_main]
+
 extern crate bitcoin;
-extern crate crypto;
+extern crate bitcoin_hashes;
 extern crate lightning;
 extern crate secp256k1;
 
 use bitcoin::blockdata::block::BlockHeader;
 use bitcoin::blockdata::transaction::{Transaction, TxOut};
-use bitcoin::blockdata::script::Script;
+use bitcoin::blockdata::script::{Builder, Script};
+use bitcoin::blockdata::opcodes;
+use bitcoin::consensus::encode::deserialize;
 use bitcoin::network::constants::Network;
-use bitcoin::network::serialize::{serialize, BitcoinHash};
-use bitcoin::util::hash::Sha256dHash;
+use bitcoin::util::hash::BitcoinHash;
 
-use crypto::digest::Digest;
+use bitcoin_hashes::Hash as TraitImport;
+use bitcoin_hashes::HashEngine as TraitImportEngine;
+use bitcoin_hashes::sha256::Hash as Sha256;
+use bitcoin_hashes::hash160::Hash as Hash160;
+use bitcoin_hashes::sha256d::Hash as Sha256dHash;
 
 use lightning::chain::chaininterface::{BroadcasterInterface,ConfirmationTarget,ChainListener,FeeEstimator,ChainWatchInterfaceUtil};
 use lightning::chain::transaction::OutPoint;
+use lightning::chain::keysinterface::{ChannelKeys, KeysInterface};
 use lightning::ln::channelmonitor;
-use lightning::ln::channelmanager::ChannelManager;
+use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage};
 use lightning::ln::peer_handler::{MessageHandler,PeerManager,SocketDescriptor};
 use lightning::ln::router::Router;
 use lightning::util::events::{EventsProvider,Event};
-use lightning::util::reset_rng_state;
 use lightning::util::logger::Logger;
-use lightning::util::sha2::Sha256;
+use lightning::util::config::UserConfig;
 
 mod utils;
 
@@ -31,10 +45,11 @@ use secp256k1::key::{PublicKey,SecretKey};
 use secp256k1::Secp256k1;
 
 use std::cell::RefCell;
-use std::collections::HashMap;
+use std::collections::{HashMap, hash_map};
+use std::cmp;
 use std::hash::Hash;
 use std::sync::Arc;
-use std::sync::atomic::{AtomicUsize,Ordering};
+use std::sync::atomic::{AtomicU64,AtomicUsize,Ordering};
 
 #[inline]
 pub fn slice_to_be16(v: &[u8]) -> u16 {
@@ -92,20 +107,12 @@ impl FeeEstimator for FuzzEstimator {
        fn get_est_sat_per_1000_weight(&self, _: ConfirmationTarget) -> u64 {
                //TODO: We should actually be testing at least much more than 64k...
                match self.input.get_slice(2) {
-                       Some(slice) => slice_to_be16(slice) as u64 * 250,
+                       Some(slice) => cmp::max(slice_to_be16(slice) as u64, 253),
                        None => 0
                }
        }
 }
 
-struct TestChannelMonitor {}
-impl channelmonitor::ManyChannelMonitor for TestChannelMonitor {
-       fn add_update_monitor(&self, _funding_txo: OutPoint, _monitor: channelmonitor::ChannelMonitor) -> Result<(), channelmonitor::ChannelMonitorUpdateErr> {
-               //TODO!
-               Ok(())
-       }
-}
-
 struct TestBroadcaster {}
 impl BroadcasterInterface for TestBroadcaster {
        fn broadcast_transaction(&self, _tx: &Transaction) {}
@@ -117,9 +124,8 @@ struct Peer<'a> {
        peers_connected: &'a RefCell<[bool; 256]>,
 }
 impl<'a> SocketDescriptor for Peer<'a> {
-       fn send_data(&mut self, data: &Vec<u8>, write_offset: usize, _resume_read: bool) -> usize {
-               assert!(write_offset < data.len());
-               data.len() - write_offset
+       fn send_data(&mut self, data: &[u8], _resume_read: bool) -> usize {
+               data.len()
        }
        fn disconnect_socket(&mut self) {
                assert!(self.peers_connected.borrow()[self.id as usize]);
@@ -138,10 +144,153 @@ impl<'a> Hash for Peer<'a> {
        }
 }
 
-#[inline]
-pub fn do_test(data: &[u8]) {
-       reset_rng_state();
+struct MoneyLossDetector<'a> {
+       manager: Arc<ChannelManager>,
+       monitor: Arc<channelmonitor::SimpleManyChannelMonitor<OutPoint>>,
+       handler: PeerManager<Peer<'a>>,
+
+       peers: &'a RefCell<[bool; 256]>,
+       funding_txn: Vec<Transaction>,
+       txids_confirmed: HashMap<Sha256dHash, usize>,
+       header_hashes: Vec<Sha256dHash>,
+       height: usize,
+       max_height: usize,
+       blocks_connected: u32,
+}
+impl<'a> MoneyLossDetector<'a> {
+       pub fn new(peers: &'a RefCell<[bool; 256]>, manager: Arc<ChannelManager>, monitor: Arc<channelmonitor::SimpleManyChannelMonitor<OutPoint>>, handler: PeerManager<Peer<'a>>) -> Self {
+               MoneyLossDetector {
+                       manager,
+                       monitor,
+                       handler,
+
+                       peers,
+                       funding_txn: Vec::new(),
+                       txids_confirmed: HashMap::new(),
+                       header_hashes: vec![Default::default()],
+                       height: 0,
+                       max_height: 0,
+                       blocks_connected: 0,
+               }
+       }
+
+       fn connect_block(&mut self, all_txn: &[Transaction]) {
+               let mut txn = Vec::with_capacity(all_txn.len());
+               let mut txn_idxs = Vec::with_capacity(all_txn.len());
+               for (idx, tx) in all_txn.iter().enumerate() {
+                       let txid = tx.txid();
+                       match self.txids_confirmed.entry(txid) {
+                               hash_map::Entry::Vacant(e) => {
+                                       e.insert(self.height);
+                                       txn.push(tx);
+                                       txn_idxs.push(idx as u32 + 1);
+                               },
+                               _ => {},
+                       }
+               }
+
+               let header = BlockHeader { version: 0x20000000, prev_blockhash: self.header_hashes[self.height], merkle_root: Default::default(), time: self.blocks_connected, bits: 42, nonce: 42 };
+               self.height += 1;
+               self.blocks_connected += 1;
+               self.manager.block_connected(&header, self.height as u32, &txn[..], &txn_idxs[..]);
+               (*self.monitor).block_connected(&header, self.height as u32, &txn[..], &txn_idxs[..]);
+               if self.header_hashes.len() > self.height {
+                       self.header_hashes[self.height] = header.bitcoin_hash();
+               } else {
+                       assert_eq!(self.header_hashes.len(), self.height);
+                       self.header_hashes.push(header.bitcoin_hash());
+               }
+               self.max_height = cmp::max(self.height, self.max_height);
+       }
+
+       fn disconnect_block(&mut self) {
+               if self.height > 0 && (self.max_height < 6 || self.height >= self.max_height - 6) {
+                       self.height -= 1;
+                       let header = BlockHeader { version: 0x20000000, prev_blockhash: self.header_hashes[self.height], merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
+                       self.manager.block_disconnected(&header, self.height as u32);
+                       self.monitor.block_disconnected(&header, self.height as u32);
+                       let removal_height = self.height;
+                       self.txids_confirmed.retain(|_, height| {
+                               removal_height != *height
+                       });
+               }
+       }
+}
+
+impl<'a> Drop for MoneyLossDetector<'a> {
+       fn drop(&mut self) {
+               if !::std::thread::panicking() {
+                       // Disconnect all peers
+                       for (idx, peer) in self.peers.borrow().iter().enumerate() {
+                               if *peer {
+                                       self.handler.disconnect_event(&Peer{id: idx as u8, peers_connected: &self.peers});
+                               }
+                       }
+
+                       // Force all channels onto the chain (and time out claim txn)
+                       self.manager.force_close_all_channels();
+               }
+       }
+}
+
+struct KeyProvider {
+       node_secret: SecretKey,
+       counter: AtomicU64,
+}
+impl KeysInterface for KeyProvider {
+       fn get_node_secret(&self) -> SecretKey {
+               self.node_secret.clone()
+       }
+
+       fn get_destination_script(&self) -> Script {
+               let secp_ctx = Secp256k1::signing_only();
+               let channel_monitor_claim_key = SecretKey::from_slice(&hex::decode("0fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff").unwrap()[..]).unwrap();
+               let our_channel_monitor_claim_key_hash = <Hash160 as bitcoin_hashes::Hash>::hash(&PublicKey::from_secret_key(&secp_ctx, &channel_monitor_claim_key).serialize());
+               Builder::new().push_opcode(opcodes::all::OP_PUSHBYTES_0).push_slice(&our_channel_monitor_claim_key_hash[..]).into_script()
+       }
+
+       fn get_shutdown_pubkey(&self) -> PublicKey {
+               let secp_ctx = Secp256k1::signing_only();
+               PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap())
+       }
+
+       fn get_channel_keys(&self, inbound: bool) -> ChannelKeys {
+               let ctr = self.counter.fetch_add(1, Ordering::Relaxed) as u8;
+               if inbound {
+                       ChannelKeys {
+                               funding_key:               SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, ctr]).unwrap(),
+                               revocation_base_key:       SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, ctr]).unwrap(),
+                               payment_base_key:          SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, ctr]).unwrap(),
+                               delayed_payment_base_key:  SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, ctr]).unwrap(),
+                               htlc_base_key:             SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, ctr]).unwrap(),
+                               commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, ctr],
+                       }
+               } else {
+                       ChannelKeys {
+                               funding_key:               SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, ctr]).unwrap(),
+                               revocation_base_key:       SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, ctr]).unwrap(),
+                               payment_base_key:          SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, ctr]).unwrap(),
+                               delayed_payment_base_key:  SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, ctr]).unwrap(),
+                               htlc_base_key:             SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, ctr]).unwrap(),
+                               commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, ctr],
+                       }
+               }
+       }
+
+       fn get_session_key(&self) -> SecretKey {
+               let ctr = self.counter.fetch_add(1, Ordering::Relaxed) as u8;
+               SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, ctr]).unwrap()
+       }
 
+       fn get_channel_id(&self) -> [u8; 32] {
+               let ctr = self.counter.fetch_add(1, Ordering::Relaxed);
+               [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+               (ctr >> 8*7) as u8, (ctr >> 8*6) as u8, (ctr >> 8*5) as u8, (ctr >> 8*4) as u8, (ctr >> 8*3) as u8, (ctr >> 8*2) as u8, (ctr >> 8*1) as u8, 14, (ctr >> 8*0) as u8]
+       }
+}
+
+#[inline]
+pub fn do_test(data: &[u8], logger: &Arc<Logger>) {
        let input = Arc::new(InputData {
                data: data.to_vec(),
                read_pos: AtomicUsize::new(0),
@@ -159,37 +308,40 @@ pub fn do_test(data: &[u8]) {
                }
        }
 
-       let secp_ctx = Secp256k1::new();
        macro_rules! get_pubkey {
                () => {
-                       match PublicKey::from_slice(&secp_ctx, get_slice!(33)) {
+                       match PublicKey::from_slice(get_slice!(33)) {
                                Ok(key) => key,
                                Err(_) => return,
                        }
                }
        }
 
-       let our_network_key = match SecretKey::from_slice(&secp_ctx, get_slice!(32)) {
+       let our_network_key = match SecretKey::from_slice(get_slice!(32)) {
                Ok(key) => key,
                Err(_) => return,
        };
 
-       let logger: Arc<Logger> = Arc::new(test_logger::TestLogger{});
-       let monitor = Arc::new(TestChannelMonitor{});
-       let watch = Arc::new(ChainWatchInterfaceUtil::new(Arc::clone(&logger)));
+       let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin, Arc::clone(&logger)));
        let broadcast = Arc::new(TestBroadcaster{});
+       let monitor = channelmonitor::SimpleManyChannelMonitor::new(watch.clone(), broadcast.clone(), Arc::clone(&logger), fee_est.clone());
 
-       let channelmanager = ChannelManager::new(our_network_key, slice_to_be32(get_slice!(4)), get_slice!(1)[0] != 0, Network::Bitcoin, fee_est.clone(), monitor.clone(), watch.clone(), broadcast.clone(), Arc::clone(&logger)).unwrap();
-       let router = Arc::new(Router::new(PublicKey::from_secret_key(&secp_ctx, &our_network_key).unwrap(), Arc::clone(&logger)));
+       let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone(), counter: AtomicU64::new(0) });
+       let mut config = UserConfig::new();
+       config.channel_options.fee_proportional_millionths =  slice_to_be32(get_slice!(4));
+       config.channel_options.announced_channel = get_slice!(1)[0] != 0;
+       config.peer_channel_config_limits.min_dust_limit_satoshis = 0;
+       let channelmanager = ChannelManager::new(Network::Bitcoin, fee_est.clone(), monitor.clone(), watch.clone(), broadcast.clone(), Arc::clone(&logger), keys_manager.clone(), config, 0).unwrap();
+       let router = Arc::new(Router::new(PublicKey::from_secret_key(&Secp256k1::signing_only(), &keys_manager.get_node_secret()), watch.clone(), Arc::clone(&logger)));
 
        let peers = RefCell::new([false; 256]);
-       let handler = PeerManager::new(MessageHandler {
+       let mut loss_detector = MoneyLossDetector::new(&peers, channelmanager.clone(), monitor.clone(), PeerManager::new(MessageHandler {
                chan_handler: channelmanager.clone(),
                route_handler: router.clone(),
-       }, our_network_key, Arc::clone(&logger));
+       }, our_network_key, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 0], Arc::clone(&logger)));
 
        let mut should_forward = false;
-       let mut payments_received: Vec<[u8; 32]> = Vec::new();
+       let mut payments_received: Vec<PaymentHash> = Vec::new();
        let mut payments_sent = 0;
        let mut pending_funding_generation: Vec<([u8; 32], u64, Script)> = Vec::new();
        let mut pending_funding_signatures = HashMap::new();
@@ -206,8 +358,8 @@ pub fn do_test(data: &[u8]) {
                                        }
                                }
                                if new_id == 0 { return; }
+                               loss_detector.handler.new_outbound_connection(get_pubkey!(), Peer{id: (new_id - 1) as u8, peers_connected: &peers}).unwrap();
                                peers.borrow_mut()[new_id - 1] = true;
-                               handler.new_outbound_connection(get_pubkey!(), Peer{id: (new_id - 1) as u8, peers_connected: &peers}).unwrap();
                        },
                        1 => {
                                let mut new_id = 0;
@@ -218,19 +370,19 @@ pub fn do_test(data: &[u8]) {
                                        }
                                }
                                if new_id == 0 { return; }
+                               loss_detector.handler.new_inbound_connection(Peer{id: (new_id - 1) as u8, peers_connected: &peers}).unwrap();
                                peers.borrow_mut()[new_id - 1] = true;
-                               handler.new_inbound_connection(Peer{id: (new_id - 1) as u8, peers_connected: &peers}).unwrap();
                        },
                        2 => {
                                let peer_id = get_slice!(1)[0];
                                if !peers.borrow()[peer_id as usize] { return; }
+                               loss_detector.handler.disconnect_event(&Peer{id: peer_id, peers_connected: &peers});
                                peers.borrow_mut()[peer_id as usize] = false;
-                               handler.disconnect_event(&Peer{id: peer_id, peers_connected: &peers});
                        },
                        3 => {
                                let peer_id = get_slice!(1)[0];
                                if !peers.borrow()[peer_id as usize] { return; }
-                               match handler.read_event(&mut Peer{id: peer_id, peers_connected: &peers}, get_slice!(get_slice!(1)[0]).to_vec()) {
+                               match loss_detector.handler.read_event(&mut Peer{id: peer_id, peers_connected: &peers}, get_slice!(get_slice!(1)[0]).to_vec()) {
                                        Ok(res) => assert!(!res),
                                        Err(_) => { peers.borrow_mut()[peer_id as usize] = false; }
                                }
@@ -241,11 +393,11 @@ pub fn do_test(data: &[u8]) {
                                        Ok(route) => route,
                                        Err(_) => return,
                                };
-                               let mut payment_hash = [0; 32];
-                               payment_hash[0..8].copy_from_slice(&be64_to_array(payments_sent));
-                               let mut sha = Sha256::new();
-                               sha.input(&payment_hash);
-                               sha.result(&mut payment_hash);
+                               let mut payment_hash = PaymentHash([0; 32]);
+                               payment_hash.0[0..8].copy_from_slice(&be64_to_array(payments_sent));
+                               let mut sha = Sha256::engine();
+                               sha.input(&payment_hash.0[..]);
+                               payment_hash.0 = Sha256::from_engine(sha).into_inner();
                                payments_sent += 1;
                                match channelmanager.send_payment(route, payment_hash) {
                                        Ok(_) => {},
@@ -270,7 +422,6 @@ pub fn do_test(data: &[u8]) {
                        7 => {
                                if should_forward {
                                        channelmanager.process_pending_htlc_forwards();
-                                       handler.process_events();
                                        should_forward = false;
                                }
                        },
@@ -280,11 +431,11 @@ pub fn do_test(data: &[u8]) {
                                        // for the remaining bytes. Thus, if not all remaining bytes are 0s we cannot
                                        // fulfill this HTLC, but if they are, we can just take the first byte and
                                        // place that anywhere in our preimage.
-                                       if &payment[1..] != &[0; 31] {
+                                       if &payment.0[1..] != &[0; 31] {
                                                channelmanager.fail_htlc_backwards(&payment);
                                        } else {
-                                               let mut payment_preimage = [0; 32];
-                                               payment_preimage[0] = payment[0];
+                                               let mut payment_preimage = PaymentPreimage([0; 32]);
+                                               payment_preimage.0[0] = payment.0[0];
                                                channelmanager.claim_funds(payment_preimage);
                                        }
                                }
@@ -295,46 +446,69 @@ pub fn do_test(data: &[u8]) {
                                }
                        },
                        10 => {
-                               for funding_generation in pending_funding_generation.drain(..) {
+                               'outer_loop: for funding_generation in pending_funding_generation.drain(..) {
                                        let mut tx = Transaction { version: 0, lock_time: 0, input: Vec::new(), output: vec![TxOut {
                                                        value: funding_generation.1, script_pubkey: funding_generation.2,
                                                }] };
-                                       let funding_output = OutPoint::new(Sha256dHash::from_data(&serialize(&tx).unwrap()[..]), 0);
-                                       let mut found_duplicate_txo = false;
-                                       for chan in channelmanager.list_channels() {
-                                               if chan.channel_id == funding_output.to_channel_id() {
-                                                       found_duplicate_txo = true;
+                                       let funding_output = 'search_loop: loop {
+                                               let funding_txid = tx.txid();
+                                               if let None = loss_detector.txids_confirmed.get(&funding_txid) {
+                                                       let outpoint = OutPoint::new(funding_txid, 0);
+                                                       for chan in channelmanager.list_channels() {
+                                                               if chan.channel_id == outpoint.to_channel_id() {
+                                                                       tx.version += 1;
+                                                                       continue 'search_loop;
+                                                               }
+                                                       }
+                                                       break outpoint;
                                                }
-                                       }
-                                       if !found_duplicate_txo {
-                                               channelmanager.funding_transaction_generated(&funding_generation.0, funding_output.clone());
-                                               pending_funding_signatures.insert(funding_output, tx);
-                                       }
+                                               tx.version += 1;
+                                               if tx.version > 0xff {
+                                                       continue 'outer_loop;
+                                               }
+                                       };
+                                       channelmanager.funding_transaction_generated(&funding_generation.0, funding_output.clone());
+                                       pending_funding_signatures.insert(funding_output, tx);
                                }
                        },
                        11 => {
                                if !pending_funding_relay.is_empty() {
-                                       let mut txn = Vec::with_capacity(pending_funding_relay.len());
-                                       let mut txn_idxs = Vec::with_capacity(pending_funding_relay.len());
-                                       for (idx, tx) in pending_funding_relay.iter().enumerate() {
-                                               txn.push(tx);
-                                               txn_idxs.push(idx as u32 + 1);
+                                       loss_detector.connect_block(&pending_funding_relay[..]);
+                                       for _ in 2..100 {
+                                               loss_detector.connect_block(&[]);
                                        }
-
-                                       let mut header = BlockHeader { version: 0x20000000, prev_blockhash: Default::default(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
-                                       channelmanager.block_connected(&header, 1, &txn[..], &txn_idxs[..]);
-                                       txn.clear();
-                                       txn_idxs.clear();
-                                       for i in 2..100 {
-                                               header = BlockHeader { version: 0x20000000, prev_blockhash: header.bitcoin_hash(), merkle_root: Default::default(), time: 42, bits: 42, nonce: 42 };
-                                               channelmanager.block_connected(&header, i, &txn[..], &txn_idxs[..]);
+                               }
+                               for tx in pending_funding_relay.drain(..) {
+                                       loss_detector.funding_txn.push(tx);
+                               }
+                       },
+                       12 => {
+                               let txlen = slice_to_be16(get_slice!(2));
+                               if txlen == 0 {
+                                       loss_detector.connect_block(&[]);
+                               } else {
+                                       let txres: Result<Transaction, _> = deserialize(get_slice!(txlen));
+                                       if let Ok(tx) = txres {
+                                               loss_detector.connect_block(&[tx]);
+                                       } else {
+                                               return;
                                        }
                                }
-                               pending_funding_relay.clear();
+                       },
+                       13 => {
+                               loss_detector.disconnect_block();
+                       },
+                       14 => {
+                               let mut channels = channelmanager.list_channels();
+                               let channel_id = get_slice!(1)[0] as usize;
+                               if channel_id >= channels.len() { return; }
+                               channels.sort_by(|a, b| { a.channel_id.cmp(&b.channel_id) });
+                               channelmanager.force_close_channel(&channels[channel_id].channel_id);
                        },
                        _ => return,
                }
-               for event in handler.get_and_clear_pending_events() {
+               loss_detector.handler.process_events();
+               for event in loss_detector.manager.get_and_clear_pending_events() {
                        match event {
                                Event::FundingGenerationReady { temporary_channel_id, channel_value_satoshis, output_script, .. } => {
                                        pending_funding_generation.push((temporary_channel_id, channel_value_satoshis, output_script));
@@ -347,22 +521,22 @@ pub fn do_test(data: &[u8]) {
                                },
                                Event::PaymentSent {..} => {},
                                Event::PaymentFailed {..} => {},
-
                                Event::PendingHTLCsForwardable {..} => {
                                        should_forward = true;
                                },
-                               _ => panic!("Unknown event"),
+                               Event::SpendableOutputs {..} => {},
                        }
                }
        }
 }
 
 #[cfg(feature = "afl")]
-extern crate afl;
+#[macro_use] extern crate afl;
 #[cfg(feature = "afl")]
 fn main() {
-       afl::read_stdio_bytes(|data| {
-               do_test(&data);
+       fuzz!(|data| {
+               let logger: Arc<Logger> = Arc::new(test_logger::TestLogger::new("".to_owned()));
+               do_test(data, &logger);
        });
 }
 
@@ -372,16 +546,345 @@ fn main() {
 fn main() {
        loop {
                fuzz!(|data| {
-                       do_test(data);
+                       let logger: Arc<Logger> = Arc::new(test_logger::TestLogger::new("".to_owned()));
+                       do_test(data, &logger);
                });
        }
 }
 
+#[cfg(feature = "libfuzzer_fuzz")]
+#[macro_use] extern crate libfuzzer_sys;
+#[cfg(feature = "libfuzzer_fuzz")]
+fuzz_target!(|data: &[u8]| {
+       let logger: Arc<Logger> = Arc::new(test_logger::TestLogger::new("".to_owned()));
+       do_test(data, &logger);
+});
+
 extern crate hex;
 #[cfg(test)]
 mod tests {
+       use utils::test_logger;
+       use lightning::util::logger::{Logger, Record};
+       use std::collections::HashMap;
+       use std::sync::{Arc, Mutex};
+
        #[test]
        fn duplicate_crash() {
-               super::do_test(&::hex::decode("00").unwrap());
+               let logger: Arc<Logger> = Arc::new(test_logger::TestLogger::new("".to_owned()));
+               super::do_test(&::hex::decode("00").unwrap(), &logger);
+       }
+
+       struct TrackingLogger {
+               /// (module, message) -> count
+               pub lines: Mutex<HashMap<(String, String), usize>>,
+       }
+       impl Logger for TrackingLogger {
+               fn log(&self, record: &Record) {
+                       *self.lines.lock().unwrap().entry((record.module_path.to_string(), format!("{}", record.args))).or_insert(0) += 1;
+                       println!("{:<5} [{} : {}, {}] {}", record.level.to_string(), record.module_path, record.file, record.line, record.args);
+               }
+       }
+
+       #[test]
+       fn test_no_existing_test_breakage() {
+               // To avoid accidentally causing all existing fuzz test cases to be useless by making minor
+               // changes (such as requesting feerate info in a new place), we run a pretty full
+               // step-through with two peers and HTLC forwarding here. Obviously this is pretty finicky,
+               // so this should be updated pretty liberally, but at least we'll know when changes occur.
+               // If nothing else, this test serves as a pretty great initial full_stack_target seed.
+
+               // What each byte represents is broken down below, and then everything is concatenated into
+               // one large test at the end (you want %s/ -.*//g %s/\n\| \|\t\|\///g).
+
+               // Following BOLT 8, lightning message on the wire are: 2-byte encrypted message length + 
+               // 16-byte MAC of the encrypted message length + encrypted Lightning message + 16-byte MAC
+               // of the Lightning message
+               // I.e 2nd inbound read, len 18 : 0006 (encrypted message length) + 03000000000000000000000000000000 (MAC of the encrypted message length)
+               // Len 22 : 0010 00000000 (encrypted lightning message) + 03000000000000000000000000000000 (MAC of the Lightning message)
+
+               // 0000000000000000000000000000000000000000000000000000000000000000 - our network key
+               // 00000000 - fee_proportional_millionths
+               // 01 - announce_channels_publicly
+               //
+               // 00 - new outbound connection with id 0
+               // 030000000000000000000000000000000000000000000000000000000000000000 - peer's pubkey
+               // 030032 - inbound read from peer id 0 of len 50
+               // 00 030000000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - noise act two (0||pubkey||mac)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0006 03000000000000000000000000000000 - message header indicating message length 6
+               // 030016 - inbound read from peer id 0 of len 22
+               // 0010 00000000 03000000000000000000000000000000 - init message with no features (type 16) and mac
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0141 03000000000000000000000000000000 - message header indicating message length 321
+               // 0300fe - inbound read from peer id 0 of len 254
+               // 0020 7500000000000000000000000000000000000000000000000000000000000000 ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679 000000000000c350 0000000000000000 0000000000000222 ffffffffffffffff 0000000000000222 0000000000000000 000000fd 0006 01e3 030000000000000000000000000000000000000000000000000000000000000001 030000000000000000000000000000000000000000000000000000000000000002 030000000000000000000000000000000000000000000000000000000000000003 030000000000000000000000000000000000000000000000000000000000000004 - beginning of open_channel message
+               // 030053 - inbound read from peer id 0 of len 83
+               // 030000000000000000000000000000000000000000000000000000000000000005 030000000000000000000000000000000000000000000000000000000000000000 01 03000000000000000000000000000000 - rest of open_channel and mac
+               //
+               // 00fd00fd00fd - Three feerate requests (all returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               // - client should now respond with accept_channel (CHECK 1: type 33 to peer 03000000)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0084 03000000000000000000000000000000 - message header indicating message length 132
+               // 030094 - inbound read from peer id 0 of len 148
+               // 0022 ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679 3d00000000000000000000000000000000000000000000000000000000000000 0000 5c000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 03000000000000000000000000000000 - funding_created and mac
+               // - client should now respond with funding_signed (CHECK 2: type 35 to peer 03000000)
+               //
+               // 0c005e - connect a block with one transaction of len 94
+               // 020000000100000000000000000000000000000000000000000000000000000000000000000000000000ffffffff0150c3000000000000220020ae0000000000000000000000000000000000000000000000000000000000000000000000 - the funding transaction
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // - by now client should have sent a funding_locked (CHECK 3: SendFundingLocked to 03000000 for chan 3d000000)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0043 03000000000000000000000000000000 - message header indicating message length 67
+               // 030053 - inbound read from peer id 0 of len 83
+               // 0024 3d00000000000000000000000000000000000000000000000000000000000000 030100000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - funding_locked and mac
+               //
+               // 01 - new inbound connection with id 1
+               // 030132 - inbound read from peer id 1 of len 50
+               // 0003000000000000000000000000000000000000000000000000000000000000000003000000000000000000000000000000 - inbound noise act 1
+               // 030142 - inbound read from peer id 1 of len 66
+               // 000302000000000000000000000000000000000000000000000000000000000000000300000000000000000000000000000003000000000000000000000000000000 - inbound noise act 3
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0006 01000000000000000000000000000000 - message header indicating message length 6
+               // 030116 - inbound read from peer id 1 of len 22
+               // 0010 00000000 01000000000000000000000000000000 - init message with no features (type 16)
+               //
+               // 05 01 030200000000000000000000000000000000000000000000000000000000000000 00c350 0003e8 - create outbound channel to peer 1 for 50k sat
+               // 00fd00fd00fd - Three feerate requests (all returning min feerate) (gonna be ingested by FuzzEstimator)
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0110 01000000000000000000000000000000 - message header indicating message length 272
+               // 0301ff - inbound read from peer id 1 of len 255
+               // 0021 0000000000000000000000000000000000000000000000000000000000000e02 000000000000001a 00000000004c4b40 00000000000003e8 00000000000003e8 00000002 03f0 0005 030000000000000000000000000000000000000000000000000000000000000100 030000000000000000000000000000000000000000000000000000000000000200 030000000000000000000000000000000000000000000000000000000000000300 030000000000000000000000000000000000000000000000000000000000000400 030000000000000000000000000000000000000000000000000000000000000500 03000000000000000000000000000000 - beginning of accept_channel
+               // 030121 - inbound read from peer id 1 of len 33
+               // 0000000000000000000000000000000000 01000000000000000000000000000000 - rest of accept_channel and mac
+               //
+               // 0a - create the funding transaction (client should send funding_created now)
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0062 01000000000000000000000000000000 - message header indicating message length 98
+               // 030172 - inbound read from peer id 1 of len 114
+               // 0023 3900000000000000000000000000000000000000000000000000000000000000 f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 01000000000000000000000000000000 - funding_signed message and mac
+               //
+               // 0b - broadcast funding transaction
+               // - by now client should have sent a funding_locked (CHECK 4: SendFundingLocked to 03020000 for chan 3f000000)
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0043 01000000000000000000000000000000 - message header indicating message length 67
+               // 030153 - inbound read from peer id 1 of len 83
+               // 0024 3900000000000000000000000000000000000000000000000000000000000000 030100000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - funding_locked and mac
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 05ac 03000000000000000000000000000000 - message header indicating message length 1452
+               // 0300ff - inbound read from peer id 0 of len 255
+               // 0080 3d00000000000000000000000000000000000000000000000000000000000000 0000000000000000 0000000000003e80 ff00000000000000000000000000000000000000000000000000000000000000 00000121 00 030000000000000000000000000000000000000000000000000000000000000555 0000000e000001000000000000000003e8000000010000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff - beginning of update_add_htlc from 0 to 1 via client
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300c1 - inbound read from peer id 0 of len 193
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ef00000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - end of update_add_htlc from 0 to 1 via client and mac
+               //
+               // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0064 03000000000000000000000000000000 - message header indicating message length 100
+               // 030074 - inbound read from peer id 0 of len 116
+               // 0084 3d00000000000000000000000000000000000000000000000000000000000000 4d000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 0000 03000000000000000000000000000000 - commitment_signed and mac
+               // - client should now respond with revoke_and_ack and commitment_signed (CHECK 5/6: types 133 and 132 to peer 03000000)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0063 03000000000000000000000000000000 - message header indicating message length 99
+               // 030073 - inbound read from peer id 0 of len 115
+               // 0085 3d00000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 030200000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 07 - process the now-pending HTLC forward
+               // - client now sends id 1 update_add_htlc and commitment_signed (CHECK 7: SendHTLCs event for node 03020000 with 1 HTLCs for channel 3f000000)
+               //
+               // - we respond with commitment_signed then revoke_and_ack (a weird, but valid, order)
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0064 01000000000000000000000000000000 - message header indicating message length 100
+               // 030174 - inbound read from peer id 1 of len 116
+               // 0084 3900000000000000000000000000000000000000000000000000000000000000 f1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0063 01000000000000000000000000000000 - message header indicating message length 99
+               // 030173 - inbound read from peer id 1 of len 115
+               // 0085 3900000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 030200000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 004a 01000000000000000000000000000000 - message header indicating message length 74
+               // 03015a - inbound read from peer id 1 of len 90
+               // 0082 3900000000000000000000000000000000000000000000000000000000000000 0000000000000000 ff00888888888888888888888888888888888888888888888888888888888888 01000000000000000000000000000000 - update_fulfill_htlc and mac
+               // - client should immediately claim the pending HTLC from peer 0 (CHECK 8: SendFulfillHTLCs for node 03000000 with preimage ff00888888 for channel 3d000000)
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0064 01000000000000000000000000000000 - message header indicating message length 100
+               // 030174 - inbound read from peer id 1 of len 116
+               // 0084 3900000000000000000000000000000000000000000000000000000000000000 fd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0063 01000000000000000000000000000000 - message header indicating message length 99
+               // 030173 - inbound read from peer id 1 of len 115
+               // 0085 3900000000000000000000000000000000000000000000000000000000000000 0100000000000000000000000000000000000000000000000000000000000000 030300000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // - before responding to the commitment_signed generated above, send a new HTLC
+               // 030012 - inbound read from peer id 0 of len 18
+               // 05ac 03000000000000000000000000000000 - message header indicating message length 1452
+               // 0300ff - inbound read from peer id 0 of len 255
+               // 0080 3d00000000000000000000000000000000000000000000000000000000000000 0000000000000001 0000000000003e80 ff00000000000000000000000000000000000000000000000000000000000000 00000121 00 030000000000000000000000000000000000000000000000000000000000000555 0000000e000001000000000000000003e8000000010000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff - beginning of update_add_htlc from 0 to 1 via client
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300c1 - inbound read from peer id 0 of len 193
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ef00000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - end of update_add_htlc from 0 to 1 via client and mac
+               //
+               // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               //
+               // - now respond to the update_fulfill_htlc+commitment_signed messages the client sent to peer 0
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0063 03000000000000000000000000000000 - message header indicating message length 99
+               // 030073 - inbound read from peer id 0 of len 115
+               // 0085 3d00000000000000000000000000000000000000000000000000000000000000 0100000000000000000000000000000000000000000000000000000000000000 030300000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - revoke_and_ack and mac
+               // - client should now respond with revoke_and_ack and commitment_signed (CHECK 5/6 duplicates)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0064 03000000000000000000000000000000 - message header indicating message length 100
+               // 030074 - inbound read from peer id 0 of len 116
+               // 0084 3d00000000000000000000000000000000000000000000000000000000000000 be000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 0000 03000000000000000000000000000000 - commitment_signed and mac
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0063 03000000000000000000000000000000 - message header indicating message length 99
+               // 030073 - inbound read from peer id 0 of len 115
+               // 0085 3d00000000000000000000000000000000000000000000000000000000000000 0200000000000000000000000000000000000000000000000000000000000000 030400000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 07 - process the now-pending HTLC forward
+               // - client now sends id 1 update_add_htlc and commitment_signed (CHECK 7 duplicate)
+               // - we respond with revoke_and_ack, then commitment_signed, then update_fail_htlc
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0064 01000000000000000000000000000000 - message header indicating message length 100
+               // 030174 - inbound read from peer id 1 of len 116
+               // 0084 3900000000000000000000000000000000000000000000000000000000000000 fc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0063 01000000000000000000000000000000 - message header indicating message length 99
+               // 030173 - inbound read from peer id 1 of len 115
+               // 0085 3900000000000000000000000000000000000000000000000000000000000000 0200000000000000000000000000000000000000000000000000000000000000 030400000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 002c 01000000000000000000000000000000 - message header indicating message length 44
+               // 03013c - inbound read from peer id 1 of len 60
+               // 0083 3900000000000000000000000000000000000000000000000000000000000000 0000000000000001 0000 01000000000000000000000000000000 - update_fail_htlc and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0064 01000000000000000000000000000000 - message header indicating message length 100
+               // 030174 - inbound read from peer id 1 of len 116
+               // 0084 3900000000000000000000000000000000000000000000000000000000000000 fb000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac
+               //
+               // 030112 - inbound read from peer id 1 of len 18
+               // 0063 01000000000000000000000000000000 - message header indicating message length 99
+               // 030173 - inbound read from peer id 1 of len 115
+               // 0085 3900000000000000000000000000000000000000000000000000000000000000 0300000000000000000000000000000000000000000000000000000000000000 030500000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 07 - process the now-pending HTLC forward
+               // - client now sends id 0 update_fail_htlc and commitment_signed (CHECK 9)
+               // - now respond to the update_fail_htlc+commitment_signed messages the client sent to peer 0
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0063 03000000000000000000000000000000 - message header indicating message length 99
+               // 030073 - inbound read from peer id 0 of len 115
+               // 0085 3d00000000000000000000000000000000000000000000000000000000000000 0300000000000000000000000000000000000000000000000000000000000000 030500000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0064 03000000000000000000000000000000 - message header indicating message length 100
+               // 030074 - inbound read from peer id 0 of len 116
+               // 0084 3d00000000000000000000000000000000000000000000000000000000000000 4f000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 0000 03000000000000000000000000000000 - commitment_signed and mac
+               // - client should now respond with revoke_and_ack (CHECK 5 duplicate)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 05ac 03000000000000000000000000000000 - message header indicating message length 1452
+               // 0300ff - inbound read from peer id 0 of len 255
+               // 0080 3d00000000000000000000000000000000000000000000000000000000000000 0000000000000002 00000000000b0838 ff00000000000000000000000000000000000000000000000000000000000000 00000121 00 030000000000000000000000000000000000000000000000000000000000000555 0000000e0000010000000000000003e800000000010000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000 ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff - beginning of update_add_htlc from 0 to 1 via client
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300ff - inbound read from peer id 0 of len 255
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff
+               // 0300c1 - inbound read from peer id 0 of len 193
+               // ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff ef00000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - end of update_add_htlc from 0 to 1 via client and mac
+               //
+               // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 00a4 03000000000000000000000000000000 - message header indicating message length 164
+               // 0300b4 - inbound read from peer id 0 of len 180
+               // 0084 3d00000000000000000000000000000000000000000000000000000000000000 07000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001 0001 c8000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000007f00000000000000 03000000000000000000000000000000 - commitment_signed and mac
+               // - client should now respond with revoke_and_ack and commitment_signed (CHECK 5/6 duplicates)
+               //
+               // 030012 - inbound read from peer id 0 of len 18
+               // 0063 03000000000000000000000000000000 - message header indicating message length 99
+               // 030073 - inbound read from peer id 0 of len 115
+               // 0085 3d00000000000000000000000000000000000000000000000000000000000000 0400000000000000000000000000000000000000000000000000000000000000 030600000000000000000000000000000000000000000000000000000000000000 03000000000000000000000000000000 - revoke_and_ack and mac
+               //
+               // 07 - process the now-pending HTLC forward
+               // - client now sends id 1 update_add_htlc and commitment_signed (CHECK 7 duplicate)
+               //
+               // 0c007d - connect a block with one transaction of len 125
+               // 0200000001390000000000000000000000000000000000000000000000000000000000000000000000000000008002000100000000000022002090000000000000000000000000000000000000000000000000000000000000006cc10000000000001600145c0000000000000000000000000000000000000005000020 - the commitment transaction for channel 3f00000000000000000000000000000000000000000000000000000000000000
+               // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator)
+               // 0c005e - connect a block with one transaction of len 94
+               // 0200000001fd00000000000000000000000000000000000000000000000000000000000000000000000000000000014f00000000000000220020f60000000000000000000000000000000000000000000000000000000000000000000000 - the funding transaction
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               // 0c0000 - connect a block with no transactions
+               //
+               // 07 - process the now-pending HTLC forward
+               // - client now fails the HTLC backwards as it was unable to extract the payment preimage (CHECK 9 duplicate and CHECK 10)
+
+               let logger = Arc::new(TrackingLogger { lines: Mutex::new(HashMap::new()) });
+               super::do_test(&::hex::decode("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+
+               let log_entries = logger.lines.lock().unwrap();
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendAcceptChannel event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679".to_string())), Some(&1)); // 1
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingSigned event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 2
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingLocked event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 3
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingLocked event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 for channel 3900000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 4
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendRevokeAndACK event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&4)); // 5
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 6
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 with 1 adds, 0 fulfills, 0 fails for channel 3900000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 7
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 1 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 8
+               assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 1 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&2)); // 9
+               assert_eq!(log_entries.get(&("lightning::ln::channelmonitor".to_string(), "Input spending remote commitment tx (00000000000000000000000000000000000000000000000000000000000000fd:0) in 0000000000000000000000000000000000000000000000000000000000000044 resolves outbound HTLC with payment hash ff00000000000000000000000000000000000000000000000000000000000000 with timeout".to_string())), Some(&1)); // 10
        }
 }