use std::error::Error;
use std::{cmp, fmt};
+use std::io::Read;
use std::result::Result;
use util::{byte_utils, internal_traits, events};
+use util::ser::{Readable, Writeable, Writer};
pub trait MsgEncodable {
fn encode(&self) -> Vec<u8>;
/// A length descriptor in the packet didn't describe the later data correctly
/// (currently only generated in node_announcement)
BadLengthDescriptor,
+ /// Error from std::io
+ Io(::std::io::Error),
+ /// 1 or 0 is not found for boolean value
+ InvalidValue,
}
pub trait MsgDecodable: Sized {
fn decode(v: &[u8]) -> Result<Self, DecodeError>;
// Channel-to-announce:
fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &AnnouncementSignatures) -> Result<(), HandleError>;
- // Error conditions:
+ // Connection loss/reestablish:
/// Indicates a connection to the peer failed/an existing connection was lost. If no connection
/// is believed to be possible in the future (eg they're sending us messages we don't
/// understand or indicate they require unknown feature bits), no_connection_possible is set
/// and any outstanding channels should be failed.
fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool);
+ fn peer_connected(&self, their_node_id: &PublicKey) -> Vec<ChannelReestablish>;
+ fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &ChannelReestablish) -> Result<(Option<FundingLocked>, Option<RevokeAndACK>, Option<CommitmentUpdate>), HandleError>;
+
+ // Error:
fn handle_error(&self, their_node_id: &PublicKey, msg: &ErrorMessage);
}
DecodeError::ShortRead => "Packet extended beyond the provided bytes",
DecodeError::ExtraAddressesPerType => "More than one address of a single type",
DecodeError::BadLengthDescriptor => "A length descriptor in the packet didn't describe the later data correctly",
+ DecodeError::Io(ref e) => e.description(),
+ DecodeError::InvalidValue => "0 or 1 is not found for boolean",
}
}
}
}
}
+impl From<::std::io::Error> for DecodeError {
+ fn from(e: ::std::io::Error) -> Self {
+ if e.kind() == ::std::io::ErrorKind::UnexpectedEof {
+ DecodeError::ShortRead
+ } else {
+ DecodeError::Io(e)
+ }
+ }
+}
+
macro_rules! secp_pubkey {
( $ctx: expr, $slice: expr ) => {
match PublicKey::from_slice($ctx, $slice) {
}
shutdown_scriptpubkey = Some(Script::from(v[321..321+len].to_vec()));
}
-
+ let mut temp_channel_id = [0; 32];
+ temp_channel_id[..].copy_from_slice(&v[32..64]);
Ok(OpenChannel {
chain_hash: deserialize(&v[0..32]).unwrap(),
- temporary_channel_id: deserialize(&v[32..64]).unwrap(),
+ temporary_channel_id: temp_channel_id,
funding_satoshis: byte_utils::slice_to_be64(&v[64..72]),
push_msat: byte_utils::slice_to_be64(&v[72..80]),
dust_limit_satoshis: byte_utils::slice_to_be64(&v[80..88]),
}
}
+impl_writeable_len_match!(AcceptChannel, {
+ {AcceptChannel{ shutdown_scriptpubkey: Some(ref script), ..}, 270 + 2 + script.len()},
+ {_, 270}
+ }, {
+ temporary_channel_id,
+ dust_limit_satoshis,
+ max_htlc_value_in_flight_msat,
+ channel_reserve_satoshis,
+ htlc_minimum_msat,
+ minimum_depth,
+ to_self_delay,
+ max_accepted_htlcs,
+ funding_pubkey,
+ revocation_basepoint,
+ payment_basepoint,
+ delayed_payment_basepoint,
+ htlc_basepoint,
+ first_per_commitment_point,
+ shutdown_scriptpubkey
+});
+
+impl_writeable!(AnnouncementSignatures, 32+8+64*2, {
+ channel_id,
+ short_channel_id,
+ node_signature,
+ bitcoin_signature
+});
+
+impl<W: Writer> Writeable<W> for ChannelReestablish {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(if self.data_loss_protect.is_some() { 32+2*8+33+32 } else { 32+2*8 });
+ self.channel_id.write(w)?;
+ self.next_local_commitment_number.write(w)?;
+ self.next_remote_commitment_number.write(w)?;
+ if let Some(ref data_loss_protect) = self.data_loss_protect {
+ data_loss_protect.your_last_per_commitment_secret.write(w)?;
+ data_loss_protect.my_current_per_commitment_point.write(w)?;
+ }
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for ChannelReestablish{
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Self {
+ channel_id: Readable::read(r)?,
+ next_local_commitment_number: Readable::read(r)?,
+ next_remote_commitment_number: Readable::read(r)?,
+ data_loss_protect: {
+ match <[u8; 32] as Readable<R>>::read(r) {
+ Ok(your_last_per_commitment_secret) =>
+ Some(DataLossProtect {
+ your_last_per_commitment_secret,
+ my_current_per_commitment_point: Readable::read(r)?,
+ }),
+ Err(DecodeError::ShortRead) => None,
+ Err(e) => return Err(e)
+ }
+ }
+ })
+ }
+}
+
+impl_writeable!(ClosingSigned, 32+8+64, {
+ channel_id,
+ fee_satoshis,
+ signature
+});
+
+impl_writeable_len_match!(CommitmentSigned, {
+ { CommitmentSigned { ref htlc_signatures, .. }, 32+64+2+htlc_signatures.len()*64 }
+ }, {
+ channel_id,
+ signature,
+ htlc_signatures
+});
+
+impl_writeable_len_match!(DecodedOnionErrorPacket, {
+ { DecodedOnionErrorPacket { ref failuremsg, ref pad, .. }, 32 + 4 + failuremsg.len() + pad.len() }
+ }, {
+ hmac,
+ failuremsg,
+ pad
+});
+
+impl_writeable!(FundingCreated, 32+32+2+64, {
+ temporary_channel_id,
+ funding_txid,
+ funding_output_index,
+ signature
+});
+
+impl_writeable!(FundingSigned, 32+64, {
+ channel_id,
+ signature
+});
+
+impl_writeable!(FundingLocked, 32+33, {
+ channel_id,
+ next_per_commitment_point
+});
+
+impl_writeable_len_match!(GlobalFeatures, {
+ { GlobalFeatures { ref flags }, flags.len() + 2 }
+ }, {
+ flags
+});
+
+impl_writeable_len_match!(LocalFeatures, {
+ { LocalFeatures { ref flags }, flags.len() + 2 }
+ }, {
+ flags
+});
+
+impl_writeable_len_match!(Init, {
+ { Init { ref global_features, ref local_features }, global_features.flags.len() + local_features.flags.len() + 4 }
+ }, {
+ global_features,
+ local_features
+});
+
+impl_writeable_len_match!(OpenChannel, {
+ { OpenChannel { shutdown_scriptpubkey: Some(ref script), .. }, 319 + 2 + script.len() },
+ { OpenChannel { shutdown_scriptpubkey: None, .. }, 319 }
+ }, {
+ chain_hash,
+ temporary_channel_id,
+ funding_satoshis,
+ push_msat,
+ dust_limit_satoshis,
+ max_htlc_value_in_flight_msat,
+ channel_reserve_satoshis,
+ htlc_minimum_msat,
+ feerate_per_kw,
+ to_self_delay,
+ max_accepted_htlcs,
+ funding_pubkey,
+ revocation_basepoint,
+ payment_basepoint,
+ delayed_payment_basepoint,
+ htlc_basepoint,
+ first_per_commitment_point,
+ channel_flags,
+ shutdown_scriptpubkey
+});
+
+impl_writeable!(RevokeAndACK, 32+32+33, {
+ channel_id,
+ per_commitment_secret,
+ next_per_commitment_point
+});
+
+impl_writeable_len_match!(Shutdown, {
+ { Shutdown { ref scriptpubkey, .. }, 32 + 2 + scriptpubkey.len() }
+ }, {
+ channel_id,
+ scriptpubkey
+});
+
+impl_writeable_len_match!(UpdateFailHTLC, {
+ { UpdateFailHTLC { ref reason, .. }, 32 + 10 + reason.data.len() }
+ }, {
+ channel_id,
+ htlc_id,
+ reason
+});
+
+impl_writeable!(UpdateFailMalformedHTLC, 32+8+32+2, {
+ channel_id,
+ htlc_id,
+ sha256_of_onion,
+ failure_code
+});
+
+impl_writeable!(UpdateFee, 32+4, {
+ channel_id,
+ feerate_per_kw
+});
+
+impl_writeable!(UpdateFulfillHTLC, 32+8+32, {
+ channel_id,
+ htlc_id,
+ payment_preimage
+});
+
+impl_writeable_len_match!(OnionErrorPacket, {
+ { OnionErrorPacket { ref data, .. }, 2 + data.len() }
+ }, {
+ data
+});
+
+impl<W: Writer> Writeable<W> for OnionPacket {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(1 + 33 + 20*65 + 32);
+ self.version.write(w)?;
+ match self.public_key {
+ Ok(pubkey) => pubkey.write(w)?,
+ Err(_) => [0u8;33].write(w)?,
+ }
+ w.write_all(&self.hop_data)?;
+ self.hmac.write(w)?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for OnionPacket {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(OnionPacket {
+ version: Readable::read(r)?,
+ public_key: {
+ let mut buf = [0u8;33];
+ r.read_exact(&mut buf)?;
+ PublicKey::from_slice(&Secp256k1::without_caps(), &buf)
+ },
+ hop_data: Readable::read(r)?,
+ hmac: Readable::read(r)?,
+ })
+ }
+}
+
+impl_writeable!(UpdateAddHTLC, 32+8+8+32+4+1366, {
+ channel_id,
+ htlc_id,
+ amount_msat,
+ payment_hash,
+ cltv_expiry,
+ onion_routing_packet
+});
+
+impl<W: Writer> Writeable<W> for OnionRealm0HopData {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(32);
+ self.short_channel_id.write(w)?;
+ self.amt_to_forward.write(w)?;
+ self.outgoing_cltv_value.write(w)?;
+ w.write_all(&[0;12])?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for OnionRealm0HopData {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(OnionRealm0HopData {
+ short_channel_id: Readable::read(r)?,
+ amt_to_forward: Readable::read(r)?,
+ outgoing_cltv_value: {
+ let v: u32 = Readable::read(r)?;
+ r.read_exact(&mut [0; 12])?;
+ v
+ }
+ })
+ }
+}
+
+impl<W: Writer> Writeable<W> for OnionHopData {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(65);
+ self.realm.write(w)?;
+ self.data.write(w)?;
+ self.hmac.write(w)?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for OnionHopData {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(OnionHopData {
+ realm: {
+ let r: u8 = Readable::read(r)?;
+ if r != 0 {
+ return Err(DecodeError::UnknownRealmByte);
+ }
+ r
+ },
+ data: Readable::read(r)?,
+ hmac: Readable::read(r)?,
+ })
+ }
+}
+
+impl<W: Writer> Writeable<W> for Ping {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(self.byteslen as usize + 4);
+ self.ponglen.write(w)?;
+ vec![0u8; self.byteslen as usize].write(w)?; // size-unchecked write
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for Ping {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Ping {
+ ponglen: Readable::read(r)?,
+ byteslen: {
+ let byteslen = Readable::read(r)?;
+ r.read_exact(&mut vec![0u8; byteslen as usize][..])?;
+ byteslen
+ }
+ })
+ }
+}
+
+impl<W: Writer> Writeable<W> for Pong {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(self.byteslen as usize + 2);
+ vec![0u8; self.byteslen as usize].write(w)?; // size-unchecked write
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for Pong {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Pong {
+ byteslen: {
+ let byteslen = Readable::read(r)?;
+ r.read_exact(&mut vec![0u8; byteslen as usize][..])?;
+ byteslen
+ }
+ })
+ }
+}
+
+impl<W: Writer> Writeable<W> for UnsignedChannelAnnouncement {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(2 + 2*32 + 4*33 + self.features.flags.len() + self.excess_data.len());
+ self.features.write(w)?;
+ self.chain_hash.write(w)?;
+ self.short_channel_id.write(w)?;
+ self.node_id_1.write(w)?;
+ self.node_id_2.write(w)?;
+ self.bitcoin_key_1.write(w)?;
+ self.bitcoin_key_2.write(w)?;
+ w.write_all(&self.excess_data[..])?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for UnsignedChannelAnnouncement {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Self {
+ features: {
+ let f: GlobalFeatures = Readable::read(r)?;
+ if f.requires_unknown_bits() {
+ return Err(DecodeError::UnknownRequiredFeature);
+ }
+ f
+ },
+ chain_hash: Readable::read(r)?,
+ short_channel_id: Readable::read(r)?,
+ node_id_1: Readable::read(r)?,
+ node_id_2: Readable::read(r)?,
+ bitcoin_key_1: Readable::read(r)?,
+ bitcoin_key_2: Readable::read(r)?,
+ excess_data: {
+ let mut excess_data = vec![];
+ r.read_to_end(&mut excess_data)?;
+ excess_data
+ },
+ })
+ }
+}
+
+impl_writeable_len_match!(ChannelAnnouncement, {
+ { ChannelAnnouncement { contents: UnsignedChannelAnnouncement {ref features, ref excess_data, ..}, .. },
+ 2 + 2*32 + 4*33 + features.flags.len() + excess_data.len() + 4*64 }
+ }, {
+ node_signature_1,
+ node_signature_2,
+ bitcoin_signature_1,
+ bitcoin_signature_2,
+ contents
+});
+
+impl<W: Writer> Writeable<W> for UnsignedChannelUpdate {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(64 + self.excess_data.len());
+ self.chain_hash.write(w)?;
+ self.short_channel_id.write(w)?;
+ self.timestamp.write(w)?;
+ self.flags.write(w)?;
+ self.cltv_expiry_delta.write(w)?;
+ self.htlc_minimum_msat.write(w)?;
+ self.fee_base_msat.write(w)?;
+ self.fee_proportional_millionths.write(w)?;
+ w.write_all(&self.excess_data[..])?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for UnsignedChannelUpdate {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Self {
+ chain_hash: Readable::read(r)?,
+ short_channel_id: Readable::read(r)?,
+ timestamp: Readable::read(r)?,
+ flags: Readable::read(r)?,
+ cltv_expiry_delta: Readable::read(r)?,
+ htlc_minimum_msat: Readable::read(r)?,
+ fee_base_msat: Readable::read(r)?,
+ fee_proportional_millionths: Readable::read(r)?,
+ excess_data: {
+ let mut excess_data = vec![];
+ r.read_to_end(&mut excess_data)?;
+ excess_data
+ },
+ })
+ }
+}
+
+impl_writeable_len_match!(ChannelUpdate, {
+ { ChannelUpdate { contents: UnsignedChannelUpdate {ref excess_data, ..}, .. },
+ 64 + excess_data.len() + 64 }
+ }, {
+ signature,
+ contents
+});
+
+impl<W: Writer> Writeable<W> for ErrorMessage {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(32 + 2 + self.data.len());
+ self.channel_id.write(w)?;
+ (self.data.len() as u16).write(w)?;
+ w.write_all(self.data.as_bytes())?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for ErrorMessage {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ Ok(Self {
+ channel_id: Readable::read(r)?,
+ data: {
+ let mut sz: usize = <u16 as Readable<R>>::read(r)? as usize;
+ let mut data = vec![];
+ let data_len = r.read_to_end(&mut data)?;
+ sz = cmp::min(data_len, sz);
+ match String::from_utf8(data[..sz as usize].to_vec()) {
+ Ok(s) => s,
+ Err(_) => return Err(DecodeError::BadText),
+ }
+ }
+ })
+ }
+}
+
+impl<W: Writer> Writeable<W> for UnsignedNodeAnnouncement {
+ fn write(&self, w: &mut W) -> Result<(), DecodeError> {
+ w.size_hint(64 + 76 + self.features.flags.len() + self.addresses.len()*38 + self.excess_address_data.len() + self.excess_data.len());
+ self.features.write(w)?;
+ self.timestamp.write(w)?;
+ self.node_id.write(w)?;
+ w.write_all(&self.rgb)?;
+ self.alias.write(w)?;
+
+ let mut addr_slice = Vec::with_capacity(self.addresses.len() * 18);
+ let mut addrs_to_encode = self.addresses.clone();
+ addrs_to_encode.sort_unstable_by(|a, b| { a.get_id().cmp(&b.get_id()) });
+ addrs_to_encode.dedup_by(|a, b| { a.get_id() == b.get_id() });
+ for addr in addrs_to_encode.iter() {
+ match addr {
+ &NetAddress::IPv4{addr, port} => {
+ addr_slice.push(1);
+ addr_slice.extend_from_slice(&addr);
+ addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
+ },
+ &NetAddress::IPv6{addr, port} => {
+ addr_slice.push(2);
+ addr_slice.extend_from_slice(&addr);
+ addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
+ },
+ &NetAddress::OnionV2{addr, port} => {
+ addr_slice.push(3);
+ addr_slice.extend_from_slice(&addr);
+ addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
+ },
+ &NetAddress::OnionV3{ed25519_pubkey, checksum, version, port} => {
+ addr_slice.push(4);
+ addr_slice.extend_from_slice(&ed25519_pubkey);
+ addr_slice.extend_from_slice(&byte_utils::be16_to_array(checksum));
+ addr_slice.push(version);
+ addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
+ },
+ }
+ }
+ ((addr_slice.len() + self.excess_address_data.len()) as u16).write(w)?;
+ w.write_all(&addr_slice[..])?;
+ w.write_all(&self.excess_address_data[..])?;
+ w.write_all(&self.excess_data[..])?;
+ Ok(())
+ }
+}
+
+impl<R: Read> Readable<R> for UnsignedNodeAnnouncement {
+ fn read(r: &mut R) -> Result<Self, DecodeError> {
+ let features: GlobalFeatures = Readable::read(r)?;
+ if features.requires_unknown_bits() {
+ return Err(DecodeError::UnknownRequiredFeature);
+ }
+ let timestamp: u32 = Readable::read(r)?;
+ let node_id: PublicKey = Readable::read(r)?;
+ let mut rgb = [0; 3];
+ r.read_exact(&mut rgb)?;
+ let alias: [u8; 32] = Readable::read(r)?;
+
+ let addrlen: u16 = Readable::read(r)?;
+ let mut addr_readpos = 0;
+ let mut addresses = Vec::with_capacity(4);
+ let mut f: u8 = 0;
+ let mut excess = 0;
+ loop {
+ if addrlen <= addr_readpos { break; }
+ f = Readable::read(r)?;
+ match f {
+ 1 => {
+ if addresses.len() > 0 {
+ return Err(DecodeError::ExtraAddressesPerType);
+ }
+ if addrlen < addr_readpos + 1 + 6 {
+ return Err(DecodeError::BadLengthDescriptor);
+ }
+ addresses.push(NetAddress::IPv4 {
+ addr: {
+ let mut addr = [0; 4];
+ r.read_exact(&mut addr)?;
+ addr
+ },
+ port: Readable::read(r)?,
+ });
+ addr_readpos += 1 + 6
+ },
+ 2 => {
+ if addresses.len() > 1 || (addresses.len() == 1 && addresses[0].get_id() != 1) {
+ return Err(DecodeError::ExtraAddressesPerType);
+ }
+ if addrlen < addr_readpos + 1 + 18 {
+ return Err(DecodeError::BadLengthDescriptor);
+ }
+ addresses.push(NetAddress::IPv6 {
+ addr: {
+ let mut addr = [0; 16];
+ r.read_exact(&mut addr)?;
+ addr
+ },
+ port: Readable::read(r)?,
+ });
+ addr_readpos += 1 + 18
+ },
+ 3 => {
+ if addresses.len() > 2 || (addresses.len() > 0 && addresses.last().unwrap().get_id() > 2) {
+ return Err(DecodeError::ExtraAddressesPerType);
+ }
+ if addrlen < addr_readpos + 1 + 12 {
+ return Err(DecodeError::BadLengthDescriptor);
+ }
+ addresses.push(NetAddress::OnionV2 {
+ addr: {
+ let mut addr = [0; 10];
+ r.read_exact(&mut addr)?;
+ addr
+ },
+ port: Readable::read(r)?,
+ });
+ addr_readpos += 1 + 12
+ },
+ 4 => {
+ if addresses.len() > 3 || (addresses.len() > 0 && addresses.last().unwrap().get_id() > 3) {
+ return Err(DecodeError::ExtraAddressesPerType);
+ }
+ if addrlen < addr_readpos + 1 + 37 {
+ return Err(DecodeError::BadLengthDescriptor);
+ }
+ addresses.push(NetAddress::OnionV3 {
+ ed25519_pubkey: Readable::read(r)?,
+ checksum: Readable::read(r)?,
+ version: Readable::read(r)?,
+ port: Readable::read(r)?,
+ });
+ addr_readpos += 1 + 37
+ },
+ _ => { excess = 1; break; }
+ }
+ }
+
+ let mut excess_data = vec![];
+ let excess_address_data = if addr_readpos < addrlen {
+ let mut excess_address_data = vec![0; (addrlen - addr_readpos) as usize];
+ r.read_exact(&mut excess_address_data[excess..])?;
+ if excess == 1 {
+ excess_address_data[0] = f;
+ }
+ excess_address_data
+ } else {
+ if excess == 1 {
+ excess_data.push(f);
+ }
+ Vec::new()
+ };
+
+ Ok(UnsignedNodeAnnouncement {
+ features: features,
+ timestamp: timestamp,
+ node_id: node_id,
+ rgb: rgb,
+ alias: alias,
+ addresses: addresses,
+ excess_address_data: excess_address_data,
+ excess_data: {
+ r.read_to_end(&mut excess_data)?;
+ excess_data
+ },
+ })
+ }
+}
+
+impl_writeable_len_match!(NodeAnnouncement, {
+ { NodeAnnouncement { contents: UnsignedNodeAnnouncement { ref features, ref addresses, ref excess_address_data, ref excess_data, ..}, .. },
+ 64 + 76 + features.flags.len() + addresses.len()*38 + excess_address_data.len() + excess_data.len() }
+ }, {
+ signature,
+ contents
+});
+
#[cfg(test)]
mod tests {
use hex;
projects / rust-lightning / blobdiff