_ Git - rust-lightning/blob - msgs.rs

   1 use secp256k1::key::PublicKey;
   2 use secp256k1::{Secp256k1, Signature};
   3 use secp256k1;
   4 use bitcoin::util::hash::Sha256dHash;
   5 use bitcoin::blockdata::script::Script;
   6
   7 use std::error::Error;
   8 use std::{cmp, fmt};
   9 use std::io::Read;
  10 use std::result::Result;
  11
  12 use util::{byte_utils, events};
  13 use util::ser::{Readable, Writeable, Writer};
  14
  15 #[derive(Debug)]
  16 pub enum DecodeError {
  17         /// Unknown realm byte in an OnionHopData packet
  18         UnknownRealmByte,
  19         /// Unknown feature mandating we fail to parse message
  20         UnknownRequiredFeature,
  21         /// Failed to decode a public key (ie it's invalid)
  22         BadPublicKey,
  23         /// Failed to decode a signature (ie it's invalid)
  24         BadSignature,
  25         /// Value expected to be text wasn't decodable as text
  26         BadText,
  27         /// Buffer too short
  28         ShortRead,
  29         /// node_announcement included more than one address of a given type!
  30         ExtraAddressesPerType,
  31         /// A length descriptor in the packet didn't describe the later data correctly
  32         /// (currently only generated in node_announcement)
  33         BadLengthDescriptor,
  34         /// Error from std::io
  35         Io(::std::io::Error),
  36         /// 1 or 0 is not found for boolean value
  37         InvalidValue,
  38 }
  39
  40 /// Tracks localfeatures which are only in init messages
  41 #[derive(Clone, PartialEq)]
  42 pub struct LocalFeatures {
  43         flags: Vec<u8>,
  44 }
  45
  46 impl LocalFeatures {
  47         pub(crate) fn new() -> LocalFeatures {
  48                 LocalFeatures {
  49                         flags: Vec::new(),
  50                 }
  51         }
  52
  53         pub(crate) fn supports_data_loss_protect(&self) -> bool {
  54                 self.flags.len() > 0 && (self.flags[0] & 3) != 0
  55         }
  56         pub(crate) fn requires_data_loss_protect(&self) -> bool {
  57                 self.flags.len() > 0 && (self.flags[0] & 1) != 0
  58         }
  59
  60         pub(crate) fn initial_routing_sync(&self) -> bool {
  61                 self.flags.len() > 0 && (self.flags[0] & (1 << 3)) != 0
  62         }
  63         pub(crate) fn set_initial_routing_sync(&mut self) {
  64                 if self.flags.len() == 0 {
  65                         self.flags.resize(1, 1 << 3);
  66                 } else {
  67                         self.flags[0] |= 1 << 3;
  68                 }
  69         }
  70
  71         pub(crate) fn supports_upfront_shutdown_script(&self) -> bool {
  72                 self.flags.len() > 0 && (self.flags[0] & (3 << 4)) != 0
  73         }
  74         pub(crate) fn requires_upfront_shutdown_script(&self) -> bool {
  75                 self.flags.len() > 0 && (self.flags[0] & (1 << 4)) != 0
  76         }
  77
  78         pub(crate) fn requires_unknown_bits(&self) -> bool {
  79                 for (idx, &byte) in self.flags.iter().enumerate() {
  80                         if idx != 0 && (byte & 0x55) != 0 {
  81                                 return true;
  82                         } else if idx == 0 && (byte & 0x14) != 0 {
  83                                 return true;
  84                         }
  85                 }
  86                 return false;
  87         }
  88
  89         pub(crate) fn supports_unknown_bits(&self) -> bool {
  90                 for (idx, &byte) in self.flags.iter().enumerate() {
  91                         if idx != 0 && byte != 0 {
  92                                 return true;
  93                         } else if idx == 0 && (byte & 0xc4) != 0 {
  94                                 return true;
  95                         }
  96                 }
  97                 return false;
  98         }
  99 }
 100
 101 /// Tracks globalfeatures which are in init messages and routing announcements
 102 #[derive(Clone, PartialEq)]
 103 pub struct GlobalFeatures {
 104         flags: Vec<u8>,
 105 }
 106
 107 impl GlobalFeatures {
 108         pub(crate) fn new() -> GlobalFeatures {
 109                 GlobalFeatures {
 110                         flags: Vec::new(),
 111                 }
 112         }
 113
 114         pub(crate) fn requires_unknown_bits(&self) -> bool {
 115                 for &byte in self.flags.iter() {
 116                         if (byte & 0x55) != 0 {
 117                                 return true;
 118                         }
 119                 }
 120                 return false;
 121         }
 122
 123         pub(crate) fn supports_unknown_bits(&self) -> bool {
 124                 for &byte in self.flags.iter() {
 125                         if byte != 0 {
 126                                 return true;
 127                         }
 128                 }
 129                 return false;
 130         }
 131 }
 132
 133 pub struct Init {
 134         pub(crate) global_features: GlobalFeatures,
 135         pub(crate) local_features: LocalFeatures,
 136 }
 137
 138 pub struct ErrorMessage {
 139         pub(crate) channel_id: [u8; 32],
 140         pub(crate) data: String,
 141 }
 142
 143 pub struct Ping {
 144         pub(crate) ponglen: u16,
 145         pub(crate) byteslen: u16,
 146 }
 147
 148 pub struct Pong {
 149         pub(crate) byteslen: u16,
 150 }
 151
 152 pub struct OpenChannel {
 153         pub(crate) chain_hash: Sha256dHash,
 154         pub(crate) temporary_channel_id: [u8; 32],
 155         pub(crate) funding_satoshis: u64,
 156         pub(crate) push_msat: u64,
 157         pub(crate) dust_limit_satoshis: u64,
 158         pub(crate) max_htlc_value_in_flight_msat: u64,
 159         pub(crate) channel_reserve_satoshis: u64,
 160         pub(crate) htlc_minimum_msat: u64,
 161         pub(crate) feerate_per_kw: u32,
 162         pub(crate) to_self_delay: u16,
 163         pub(crate) max_accepted_htlcs: u16,
 164         pub(crate) funding_pubkey: PublicKey,
 165         pub(crate) revocation_basepoint: PublicKey,
 166         pub(crate) payment_basepoint: PublicKey,
 167         pub(crate) delayed_payment_basepoint: PublicKey,
 168         pub(crate) htlc_basepoint: PublicKey,
 169         pub(crate) first_per_commitment_point: PublicKey,
 170         pub(crate) channel_flags: u8,
 171         pub(crate) shutdown_scriptpubkey: Option<Script>,
 172 }
 173
 174 pub struct AcceptChannel {
 175         pub(crate) temporary_channel_id: [u8; 32],
 176         pub(crate) dust_limit_satoshis: u64,
 177         pub(crate) max_htlc_value_in_flight_msat: u64,
 178         pub(crate) channel_reserve_satoshis: u64,
 179         pub(crate) htlc_minimum_msat: u64,
 180         pub(crate) minimum_depth: u32,
 181         pub(crate) to_self_delay: u16,
 182         pub(crate) max_accepted_htlcs: u16,
 183         pub(crate) funding_pubkey: PublicKey,
 184         pub(crate) revocation_basepoint: PublicKey,
 185         pub(crate) payment_basepoint: PublicKey,
 186         pub(crate) delayed_payment_basepoint: PublicKey,
 187         pub(crate) htlc_basepoint: PublicKey,
 188         pub(crate) first_per_commitment_point: PublicKey,
 189         pub(crate) shutdown_scriptpubkey: Option<Script>,
 190 }
 191
 192 pub struct FundingCreated {
 193         pub(crate) temporary_channel_id: [u8; 32],
 194         pub(crate) funding_txid: Sha256dHash,
 195         pub(crate) funding_output_index: u16,
 196         pub(crate) signature: Signature,
 197 }
 198
 199 pub struct FundingSigned {
 200         pub(crate) channel_id: [u8; 32],
 201         pub(crate) signature: Signature,
 202 }
 203
 204 pub struct FundingLocked {
 205         pub(crate) channel_id: [u8; 32],
 206         pub(crate) next_per_commitment_point: PublicKey,
 207 }
 208
 209 pub struct Shutdown {
 210         pub(crate) channel_id: [u8; 32],
 211         pub(crate) scriptpubkey: Script,
 212 }
 213
 214 pub struct ClosingSigned {
 215         pub(crate) channel_id: [u8; 32],
 216         pub(crate) fee_satoshis: u64,
 217         pub(crate) signature: Signature,
 218 }
 219
 220 #[derive(Clone)]
 221 pub struct UpdateAddHTLC {
 222         pub(crate) channel_id: [u8; 32],
 223         pub(crate) htlc_id: u64,
 224         pub(crate) amount_msat: u64,
 225         pub(crate) payment_hash: [u8; 32],
 226         pub(crate) cltv_expiry: u32,
 227         pub(crate) onion_routing_packet: OnionPacket,
 228 }
 229
 230 #[derive(Clone)]
 231 pub struct UpdateFulfillHTLC {
 232         pub(crate) channel_id: [u8; 32],
 233         pub(crate) htlc_id: u64,
 234         pub(crate) payment_preimage: [u8; 32],
 235 }
 236
 237 #[derive(Clone)]
 238 pub struct UpdateFailHTLC {
 239         pub(crate) channel_id: [u8; 32],
 240         pub(crate) htlc_id: u64,
 241         pub(crate) reason: OnionErrorPacket,
 242 }
 243
 244 #[derive(Clone)]
 245 pub struct UpdateFailMalformedHTLC {
 246         pub(crate) channel_id: [u8; 32],
 247         pub(crate) htlc_id: u64,
 248         pub(crate) sha256_of_onion: [u8; 32],
 249         pub(crate) failure_code: u16,
 250 }
 251
 252 #[derive(Clone)]
 253 pub struct CommitmentSigned {
 254         pub(crate) channel_id: [u8; 32],
 255         pub(crate) signature: Signature,
 256         pub(crate) htlc_signatures: Vec<Signature>,
 257 }
 258
 259 pub struct RevokeAndACK {
 260         pub(crate) channel_id: [u8; 32],
 261         pub(crate) per_commitment_secret: [u8; 32],
 262         pub(crate) next_per_commitment_point: PublicKey,
 263 }
 264
 265 pub struct UpdateFee {
 266         pub(crate) channel_id: [u8; 32],
 267         pub(crate) feerate_per_kw: u32,
 268 }
 269
 270 pub(crate) struct DataLossProtect {
 271         pub(crate) your_last_per_commitment_secret: [u8; 32],
 272         pub(crate) my_current_per_commitment_point: PublicKey,
 273 }
 274
 275 pub struct ChannelReestablish {
 276         pub(crate) channel_id: [u8; 32],
 277         pub(crate) next_local_commitment_number: u64,
 278         pub(crate) next_remote_commitment_number: u64,
 279         pub(crate) data_loss_protect: Option<DataLossProtect>,
 280 }
 281
 282 #[derive(Clone)]
 283 pub struct AnnouncementSignatures {
 284         pub(crate) channel_id: [u8; 32],
 285         pub(crate) short_channel_id: u64,
 286         pub(crate) node_signature: Signature,
 287         pub(crate) bitcoin_signature: Signature,
 288 }
 289
 290 #[derive(Clone)]
 291 pub enum NetAddress {
 292         IPv4 {
 293                 addr: [u8; 4],
 294                 port: u16,
 295         },
 296         IPv6 {
 297                 addr: [u8; 16],
 298                 port: u16,
 299         },
 300         OnionV2 {
 301                 addr: [u8; 10],
 302                 port: u16,
 303         },
 304         OnionV3 {
 305                 ed25519_pubkey: [u8; 32],
 306                 checksum: u16,
 307                 version: u8,
 308                 port: u16,
 309         },
 310 }
 311 impl NetAddress {
 312         fn get_id(&self) -> u8 {
 313                 match self {
 314                         &NetAddress::IPv4 {..} => { 1 },
 315                         &NetAddress::IPv6 {..} => { 2 },
 316                         &NetAddress::OnionV2 {..} => { 3 },
 317                         &NetAddress::OnionV3 {..} => { 4 },
 318                 }
 319         }
 320 }
 321
 322 pub struct UnsignedNodeAnnouncement {
 323         pub features: GlobalFeatures,
 324         pub timestamp: u32,
 325         pub node_id: PublicKey,
 326         pub rgb: [u8; 3],
 327         pub alias: [u8; 32],
 328         /// List of addresses on which this node is reachable. Note that you may only have up to one
 329         /// address of each type, if you have more, they may be silently discarded or we may panic!
 330         pub(crate) addresses: Vec<NetAddress>,
 331         pub(crate) excess_address_data: Vec<u8>,
 332         pub(crate) excess_data: Vec<u8>,
 333 }
 334 pub struct NodeAnnouncement {
 335         pub(crate) signature: Signature,
 336         pub(crate) contents: UnsignedNodeAnnouncement,
 337 }
 338
 339 #[derive(PartialEq, Clone)]
 340 pub struct UnsignedChannelAnnouncement {
 341         pub(crate) features: GlobalFeatures,
 342         pub(crate) chain_hash: Sha256dHash,
 343         pub(crate) short_channel_id: u64,
 344         pub        node_id_1: PublicKey,
 345         pub        node_id_2: PublicKey,
 346         pub(crate) bitcoin_key_1: PublicKey,
 347         pub(crate) bitcoin_key_2: PublicKey,
 348         pub(crate) excess_data: Vec<u8>,
 349 }
 350 #[derive(PartialEq, Clone)]
 351 pub struct ChannelAnnouncement {
 352         pub(crate) node_signature_1: Signature,
 353         pub(crate) node_signature_2: Signature,
 354         pub(crate) bitcoin_signature_1: Signature,
 355         pub(crate) bitcoin_signature_2: Signature,
 356         pub(crate) contents: UnsignedChannelAnnouncement,
 357 }
 358
 359 #[derive(PartialEq, Clone)]
 360 pub(crate) struct UnsignedChannelUpdate {
 361         pub(crate) chain_hash: Sha256dHash,
 362         pub(crate) short_channel_id: u64,
 363         pub(crate) timestamp: u32,
 364         pub(crate) flags: u16,
 365         pub(crate) cltv_expiry_delta: u16,
 366         pub(crate) htlc_minimum_msat: u64,
 367         pub(crate) fee_base_msat: u32,
 368         pub(crate) fee_proportional_millionths: u32,
 369         pub(crate) excess_data: Vec<u8>,
 370 }
 371 #[derive(PartialEq, Clone)]
 372 pub struct ChannelUpdate {
 373         pub(crate) signature: Signature,
 374         pub(crate) contents: UnsignedChannelUpdate,
 375 }
 376
 377 /// Used to put an error message in a HandleError
 378 pub enum ErrorAction {
 379         /// The peer took some action which made us think they were useless. Disconnect them.
 380         DisconnectPeer {
 381                 msg: Option<ErrorMessage>
 382         },
 383         /// The peer did something harmless that we weren't able to process, just log and ignore
 384         IgnoreError,
 385         /// The peer did something incorrect. Tell them.
 386         SendErrorMessage {
 387                 msg: ErrorMessage
 388         },
 389 }
 390
 391 pub struct HandleError { //TODO: rename me
 392         pub err: &'static str,
 393         pub action: Option<ErrorAction>, //TODO: Make this required
 394 }
 395
 396 /// Struct used to return values from revoke_and_ack messages, containing a bunch of commitment
 397 /// transaction updates if they were pending.
 398 pub struct CommitmentUpdate {
 399         pub(crate) update_add_htlcs: Vec<UpdateAddHTLC>,
 400         pub(crate) update_fulfill_htlcs: Vec<UpdateFulfillHTLC>,
 401         pub(crate) update_fail_htlcs: Vec<UpdateFailHTLC>,
 402         pub(crate) update_fail_malformed_htlcs: Vec<UpdateFailMalformedHTLC>,
 403         pub(crate) commitment_signed: CommitmentSigned,
 404 }
 405
 406 pub enum HTLCFailChannelUpdate {
 407         ChannelUpdateMessage {
 408                 msg: ChannelUpdate,
 409         },
 410         ChannelClosed {
 411                 short_channel_id: u64,
 412         },
 413 }
 414
 415 /// A trait to describe an object which can receive channel messages. Messages MAY be called in
 416 /// paralell when they originate from different their_node_ids, however they MUST NOT be called in
 417 /// paralell when the two calls have the same their_node_id.
 418 pub trait ChannelMessageHandler : events::EventsProvider + Send + Sync {
 419         //Channel init:
 420         fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &OpenChannel) -> Result<AcceptChannel, HandleError>;
 421         fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &AcceptChannel) -> Result<(), HandleError>;
 422         fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &FundingCreated) -> Result<FundingSigned, HandleError>;
 423         fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &FundingSigned) -> Result<(), HandleError>;
 424         fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &FundingLocked) -> Result<Option<AnnouncementSignatures>, HandleError>;
 425
 426         // Channl close:
 427         fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &Shutdown) -> Result<(Option<Shutdown>, Option<ClosingSigned>), HandleError>;
 428         fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &ClosingSigned) -> Result<Option<ClosingSigned>, HandleError>;
 429
 430         // HTLC handling:
 431         fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &UpdateAddHTLC) -> Result<(), HandleError>;
 432         fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFulfillHTLC) -> Result<(), HandleError>;
 433         fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailHTLC) -> Result<Option<HTLCFailChannelUpdate>, HandleError>;
 434         fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailMalformedHTLC) -> Result<(), HandleError>;
 435         fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &CommitmentSigned) -> Result<(RevokeAndACK, Option<CommitmentSigned>), HandleError>;
 436         fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &RevokeAndACK) -> Result<Option<CommitmentUpdate>, HandleError>;
 437
 438         fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &UpdateFee) -> Result<(), HandleError>;
 439
 440         // Channel-to-announce:
 441         fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &AnnouncementSignatures) -> Result<(), HandleError>;
 442
 443         // Connection loss/reestablish:
 444         /// Indicates a connection to the peer failed/an existing connection was lost. If no connection
 445         /// is believed to be possible in the future (eg they're sending us messages we don't
 446         /// understand or indicate they require unknown feature bits), no_connection_possible is set
 447         /// and any outstanding channels should be failed.
 448         fn peer_disconnected(&self, their_node_id: &PublicKey, no_connection_possible: bool);
 449
 450         fn peer_connected(&self, their_node_id: &PublicKey) -> Vec<ChannelReestablish>;
 451         fn handle_channel_reestablish(&self, their_node_id: &PublicKey, msg: &ChannelReestablish) -> Result<(Option<FundingLocked>, Option<RevokeAndACK>, Option<CommitmentUpdate>), HandleError>;
 452
 453         // Error:
 454         fn handle_error(&self, their_node_id: &PublicKey, msg: &ErrorMessage);
 455 }
 456
 457 pub trait RoutingMessageHandler : Send + Sync {
 458         fn handle_node_announcement(&self, msg: &NodeAnnouncement) -> Result<bool, HandleError>;
 459         /// Handle a channel_announcement message, returning true if it should be forwarded on, false
 460         /// or returning an Err otherwise.
 461         fn handle_channel_announcement(&self, msg: &ChannelAnnouncement) -> Result<bool, HandleError>;
 462         fn handle_channel_update(&self, msg: &ChannelUpdate) -> Result<bool, HandleError>;
 463         fn handle_htlc_fail_channel_update(&self, update: &HTLCFailChannelUpdate);
 464 }
 465
 466 pub(crate) struct OnionRealm0HopData {
 467         pub(crate) short_channel_id: u64,
 468         pub(crate) amt_to_forward: u64,
 469         pub(crate) outgoing_cltv_value: u32,
 470         // 12 bytes of 0-padding
 471 }
 472
 473 mod fuzzy_internal_msgs {
 474         // These types aren't intended to be pub, but are exposed for direct fuzzing (as we deserialize
 475         // them from untrusted input):
 476
 477         use super::OnionRealm0HopData;
 478         pub struct OnionHopData {
 479                 pub(crate) realm: u8,
 480                 pub(crate) data: OnionRealm0HopData,
 481                 pub(crate) hmac: [u8; 32],
 482         }
 483         unsafe impl ::util::internal_traits::NoDealloc for OnionHopData{}
 484
 485         pub struct DecodedOnionErrorPacket {
 486                 pub(crate) hmac: [u8; 32],
 487                 pub(crate) failuremsg: Vec<u8>,
 488                 pub(crate) pad: Vec<u8>,
 489         }
 490 }
 491 #[cfg(feature = "fuzztarget")]
 492 pub use self::fuzzy_internal_msgs::*;
 493 #[cfg(not(feature = "fuzztarget"))]
 494 pub(crate) use self::fuzzy_internal_msgs::*;
 495
 496 #[derive(Clone)]
 497 pub(crate) struct OnionPacket {
 498         pub(crate) version: u8,
 499         /// In order to ensure we always return an error on Onion decode in compliance with BOLT 4, we
 500         /// have to deserialize OnionPackets contained in UpdateAddHTLCs even if the ephemeral public
 501         /// key (here) is bogus, so we hold a Result instead of a PublicKey as we'd like.
 502         pub(crate) public_key: Result<PublicKey, secp256k1::Error>,
 503         pub(crate) hop_data: [u8; 20*65],
 504         pub(crate) hmac: [u8; 32],
 505 }
 506
 507 #[derive(Clone)]
 508 pub(crate) struct OnionErrorPacket {
 509         // This really should be a constant size slice, but the spec lets these things be up to 128KB?
 510         // (TODO) We limit it in decode to much lower...
 511         pub(crate) data: Vec<u8>,
 512 }
 513
 514 impl Error for DecodeError {
 515         fn description(&self) -> &str {
 516                 match *self {
 517                         DecodeError::UnknownRealmByte => "Unknown realm byte in Onion packet",
 518                         DecodeError::UnknownRequiredFeature => "Unknown required feature preventing decode",
 519                         DecodeError::BadPublicKey => "Invalid public key in packet",
 520                         DecodeError::BadSignature => "Invalid signature in packet",
 521                         DecodeError::BadText => "Invalid text in packet",
 522                         DecodeError::ShortRead => "Packet extended beyond the provided bytes",
 523                         DecodeError::ExtraAddressesPerType => "More than one address of a single type",
 524                         DecodeError::BadLengthDescriptor => "A length descriptor in the packet didn't describe the later data correctly",
 525                         DecodeError::Io(ref e) => e.description(),
 526                         DecodeError::InvalidValue => "0 or 1 is not found for boolean",
 527                 }
 528         }
 529 }
 530 impl fmt::Display for DecodeError {
 531         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 532                 f.write_str(self.description())
 533         }
 534 }
 535
 536 impl fmt::Debug for HandleError {
 537         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 538                 f.write_str(self.err)
 539         }
 540 }
 541
 542 impl From<::std::io::Error> for DecodeError {
 543         fn from(e: ::std::io::Error) -> Self {
 544                 if e.kind() == ::std::io::ErrorKind::UnexpectedEof {
 545                         DecodeError::ShortRead
 546                 } else {
 547                         DecodeError::Io(e)
 548                 }
 549         }
 550 }
 551
 552 impl_writeable_len_match!(AcceptChannel, {
 553                 {AcceptChannel{ shutdown_scriptpubkey: Some(ref script), ..}, 270 + 2 + script.len()},
 554                 {_, 270}
 555         }, {
 556         temporary_channel_id,
 557         dust_limit_satoshis,
 558         max_htlc_value_in_flight_msat,
 559         channel_reserve_satoshis,
 560         htlc_minimum_msat,
 561         minimum_depth,
 562         to_self_delay,
 563         max_accepted_htlcs,
 564         funding_pubkey,
 565         revocation_basepoint,
 566         payment_basepoint,
 567         delayed_payment_basepoint,
 568         htlc_basepoint,
 569         first_per_commitment_point,
 570         shutdown_scriptpubkey
 571 });
 572
 573 impl_writeable!(AnnouncementSignatures, 32+8+64*2, {
 574         channel_id,
 575         short_channel_id,
 576         node_signature,
 577         bitcoin_signature
 578 });
 579
 580 impl Writeable for ChannelReestablish {
 581         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 582                 w.size_hint(if self.data_loss_protect.is_some() { 32+2*8+33+32 } else { 32+2*8 });
 583                 self.channel_id.write(w)?;
 584                 self.next_local_commitment_number.write(w)?;
 585                 self.next_remote_commitment_number.write(w)?;
 586                 if let Some(ref data_loss_protect) = self.data_loss_protect {
 587                         data_loss_protect.your_last_per_commitment_secret.write(w)?;
 588                         data_loss_protect.my_current_per_commitment_point.write(w)?;
 589                 }
 590                 Ok(())
 591         }
 592 }
 593
 594 impl<R: Read> Readable<R> for ChannelReestablish{
 595         fn read(r: &mut R) -> Result<Self, DecodeError> {
 596                 Ok(Self {
 597                         channel_id: Readable::read(r)?,
 598                         next_local_commitment_number: Readable::read(r)?,
 599                         next_remote_commitment_number: Readable::read(r)?,
 600                         data_loss_protect: {
 601                                 match <[u8; 32] as Readable<R>>::read(r) {
 602                                         Ok(your_last_per_commitment_secret) =>
 603                                                 Some(DataLossProtect {
 604                                                         your_last_per_commitment_secret,
 605                                                         my_current_per_commitment_point: Readable::read(r)?,
 606                                                 }),
 607                                         Err(DecodeError::ShortRead) => None,
 608                                         Err(e) => return Err(e)
 609                                 }
 610                         }
 611                 })
 612         }
 613 }
 614
 615 impl_writeable!(ClosingSigned, 32+8+64, {
 616         channel_id,
 617         fee_satoshis,
 618         signature
 619 });
 620
 621 impl_writeable_len_match!(CommitmentSigned, {
 622                 { CommitmentSigned { ref htlc_signatures, .. }, 32+64+2+htlc_signatures.len()*64 }
 623         }, {
 624         channel_id,
 625         signature,
 626         htlc_signatures
 627 });
 628
 629 impl_writeable_len_match!(DecodedOnionErrorPacket, {
 630                 { DecodedOnionErrorPacket { ref failuremsg, ref pad, .. }, 32 + 4 + failuremsg.len() + pad.len() }
 631         }, {
 632         hmac,
 633         failuremsg,
 634         pad
 635 });
 636
 637 impl_writeable!(FundingCreated, 32+32+2+64, {
 638         temporary_channel_id,
 639         funding_txid,
 640         funding_output_index,
 641         signature
 642 });
 643
 644 impl_writeable!(FundingSigned, 32+64, {
 645         channel_id,
 646         signature
 647 });
 648
 649 impl_writeable!(FundingLocked, 32+33, {
 650         channel_id,
 651         next_per_commitment_point
 652 });
 653
 654 impl_writeable_len_match!(GlobalFeatures, {
 655                 { GlobalFeatures { ref flags }, flags.len() + 2 }
 656         }, {
 657         flags
 658 });
 659
 660 impl_writeable_len_match!(LocalFeatures, {
 661                 { LocalFeatures { ref flags }, flags.len() + 2 }
 662         }, {
 663         flags
 664 });
 665
 666 impl_writeable_len_match!(Init, {
 667                 { Init { ref global_features, ref local_features }, global_features.flags.len() + local_features.flags.len() + 4 }
 668         }, {
 669         global_features,
 670         local_features
 671 });
 672
 673 impl_writeable_len_match!(OpenChannel, {
 674                 { OpenChannel { shutdown_scriptpubkey: Some(ref script), .. }, 319 + 2 + script.len() },
 675                 { OpenChannel { shutdown_scriptpubkey: None, .. }, 319 }
 676         }, {
 677         chain_hash,
 678         temporary_channel_id,
 679         funding_satoshis,
 680         push_msat,
 681         dust_limit_satoshis,
 682         max_htlc_value_in_flight_msat,
 683         channel_reserve_satoshis,
 684         htlc_minimum_msat,
 685         feerate_per_kw,
 686         to_self_delay,
 687         max_accepted_htlcs,
 688         funding_pubkey,
 689         revocation_basepoint,
 690         payment_basepoint,
 691         delayed_payment_basepoint,
 692         htlc_basepoint,
 693         first_per_commitment_point,
 694         channel_flags,
 695         shutdown_scriptpubkey
 696 });
 697
 698 impl_writeable!(RevokeAndACK, 32+32+33, {
 699         channel_id,
 700         per_commitment_secret,
 701         next_per_commitment_point
 702 });
 703
 704 impl_writeable_len_match!(Shutdown, {
 705                 { Shutdown { ref scriptpubkey, .. }, 32 + 2 + scriptpubkey.len() }
 706         }, {
 707         channel_id,
 708         scriptpubkey
 709 });
 710
 711 impl_writeable_len_match!(UpdateFailHTLC, {
 712                 { UpdateFailHTLC { ref reason, .. }, 32 + 10 + reason.data.len() }
 713         }, {
 714         channel_id,
 715         htlc_id,
 716         reason
 717 });
 718
 719 impl_writeable!(UpdateFailMalformedHTLC, 32+8+32+2, {
 720         channel_id,
 721         htlc_id,
 722         sha256_of_onion,
 723         failure_code
 724 });
 725
 726 impl_writeable!(UpdateFee, 32+4, {
 727         channel_id,
 728         feerate_per_kw
 729 });
 730
 731 impl_writeable!(UpdateFulfillHTLC, 32+8+32, {
 732         channel_id,
 733         htlc_id,
 734         payment_preimage
 735 });
 736
 737 impl_writeable_len_match!(OnionErrorPacket, {
 738                 { OnionErrorPacket { ref data, .. }, 2 + data.len() }
 739         }, {
 740         data
 741 });
 742
 743 impl Writeable for OnionPacket {
 744         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 745                 w.size_hint(1 + 33 + 20*65 + 32);
 746                 self.version.write(w)?;
 747                 match self.public_key {
 748                         Ok(pubkey) => pubkey.write(w)?,
 749                         Err(_) => [0u8;33].write(w)?,
 750                 }
 751                 w.write_all(&self.hop_data)?;
 752                 self.hmac.write(w)?;
 753                 Ok(())
 754         }
 755 }
 756
 757 impl<R: Read> Readable<R> for OnionPacket {
 758         fn read(r: &mut R) -> Result<Self, DecodeError> {
 759                 Ok(OnionPacket {
 760                         version: Readable::read(r)?,
 761                         public_key: {
 762                                 let mut buf = [0u8;33];
 763                                 r.read_exact(&mut buf)?;
 764                                 PublicKey::from_slice(&Secp256k1::without_caps(), &buf)
 765                         },
 766                         hop_data: Readable::read(r)?,
 767                         hmac: Readable::read(r)?,
 768                 })
 769         }
 770 }
 771
 772 impl_writeable!(UpdateAddHTLC, 32+8+8+32+4+1366, {
 773         channel_id,
 774         htlc_id,
 775         amount_msat,
 776         payment_hash,
 777         cltv_expiry,
 778         onion_routing_packet
 779 });
 780
 781 impl Writeable for OnionRealm0HopData {
 782         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 783                 w.size_hint(32);
 784                 self.short_channel_id.write(w)?;
 785                 self.amt_to_forward.write(w)?;
 786                 self.outgoing_cltv_value.write(w)?;
 787                 w.write_all(&[0;12])?;
 788                 Ok(())
 789         }
 790 }
 791
 792 impl<R: Read> Readable<R> for OnionRealm0HopData {
 793         fn read(r: &mut R) -> Result<Self, DecodeError> {
 794                 Ok(OnionRealm0HopData {
 795                         short_channel_id: Readable::read(r)?,
 796                         amt_to_forward: Readable::read(r)?,
 797                         outgoing_cltv_value: {
 798                                 let v: u32 = Readable::read(r)?;
 799                                 r.read_exact(&mut [0; 12])?;
 800                                 v
 801                         }
 802                 })
 803         }
 804 }
 805
 806 impl Writeable for OnionHopData {
 807         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 808                 w.size_hint(65);
 809                 self.realm.write(w)?;
 810                 self.data.write(w)?;
 811                 self.hmac.write(w)?;
 812                 Ok(())
 813         }
 814 }
 815
 816 impl<R: Read> Readable<R> for OnionHopData {
 817         fn read(r: &mut R) -> Result<Self, DecodeError> {
 818                 Ok(OnionHopData {
 819                         realm: {
 820                                 let r: u8 = Readable::read(r)?;
 821                                 if r != 0 {
 822                                         return Err(DecodeError::UnknownRealmByte);
 823                                 }
 824                                 r
 825                         },
 826                         data: Readable::read(r)?,
 827                         hmac: Readable::read(r)?,
 828                 })
 829         }
 830 }
 831
 832 impl Writeable for Ping {
 833         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 834                 w.size_hint(self.byteslen as usize + 4);
 835                 self.ponglen.write(w)?;
 836                 vec![0u8; self.byteslen as usize].write(w)?; // size-unchecked write
 837                 Ok(())
 838         }
 839 }
 840
 841 impl<R: Read> Readable<R> for Ping {
 842         fn read(r: &mut R) -> Result<Self, DecodeError> {
 843                 Ok(Ping {
 844                         ponglen: Readable::read(r)?,
 845                         byteslen: {
 846                                 let byteslen = Readable::read(r)?;
 847                                 r.read_exact(&mut vec![0u8; byteslen as usize][..])?;
 848                                 byteslen
 849                         }
 850                 })
 851         }
 852 }
 853
 854 impl Writeable for Pong {
 855         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 856                 w.size_hint(self.byteslen as usize + 2);
 857                 vec![0u8; self.byteslen as usize].write(w)?; // size-unchecked write
 858                 Ok(())
 859         }
 860 }
 861
 862 impl<R: Read> Readable<R> for Pong {
 863         fn read(r: &mut R) -> Result<Self, DecodeError> {
 864                 Ok(Pong {
 865                         byteslen: {
 866                                 let byteslen = Readable::read(r)?;
 867                                 r.read_exact(&mut vec![0u8; byteslen as usize][..])?;
 868                                 byteslen
 869                         }
 870                 })
 871         }
 872 }
 873
 874 impl Writeable for UnsignedChannelAnnouncement {
 875         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 876                 w.size_hint(2 + 2*32 + 4*33 + self.features.flags.len() + self.excess_data.len());
 877                 self.features.write(w)?;
 878                 self.chain_hash.write(w)?;
 879                 self.short_channel_id.write(w)?;
 880                 self.node_id_1.write(w)?;
 881                 self.node_id_2.write(w)?;
 882                 self.bitcoin_key_1.write(w)?;
 883                 self.bitcoin_key_2.write(w)?;
 884                 w.write_all(&self.excess_data[..])?;
 885                 Ok(())
 886         }
 887 }
 888
 889 impl<R: Read> Readable<R> for UnsignedChannelAnnouncement {
 890         fn read(r: &mut R) -> Result<Self, DecodeError> {
 891                 Ok(Self {
 892                         features: {
 893                                 let f: GlobalFeatures = Readable::read(r)?;
 894                                 if f.requires_unknown_bits() {
 895                                         return Err(DecodeError::UnknownRequiredFeature);
 896                                 }
 897                                 f
 898                         },
 899                         chain_hash: Readable::read(r)?,
 900                         short_channel_id: Readable::read(r)?,
 901                         node_id_1: Readable::read(r)?,
 902                         node_id_2: Readable::read(r)?,
 903                         bitcoin_key_1: Readable::read(r)?,
 904                         bitcoin_key_2: Readable::read(r)?,
 905                         excess_data: {
 906                                 let mut excess_data = vec![];
 907                                 r.read_to_end(&mut excess_data)?;
 908                                 excess_data
 909                         },
 910                 })
 911         }
 912 }
 913
 914 impl_writeable_len_match!(ChannelAnnouncement, {
 915                 { ChannelAnnouncement { contents: UnsignedChannelAnnouncement {ref features, ref excess_data, ..}, .. },
 916                         2 + 2*32 + 4*33 + features.flags.len() + excess_data.len() + 4*64 }
 917         }, {
 918         node_signature_1,
 919         node_signature_2,
 920         bitcoin_signature_1,
 921         bitcoin_signature_2,
 922         contents
 923 });
 924
 925 impl Writeable for UnsignedChannelUpdate {
 926         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 927                 w.size_hint(64 + self.excess_data.len());
 928                 self.chain_hash.write(w)?;
 929                 self.short_channel_id.write(w)?;
 930                 self.timestamp.write(w)?;
 931                 self.flags.write(w)?;
 932                 self.cltv_expiry_delta.write(w)?;
 933                 self.htlc_minimum_msat.write(w)?;
 934                 self.fee_base_msat.write(w)?;
 935                 self.fee_proportional_millionths.write(w)?;
 936                 w.write_all(&self.excess_data[..])?;
 937                 Ok(())
 938         }
 939 }
 940
 941 impl<R: Read> Readable<R> for UnsignedChannelUpdate {
 942         fn read(r: &mut R) -> Result<Self, DecodeError> {
 943                 Ok(Self {
 944                         chain_hash: Readable::read(r)?,
 945                         short_channel_id: Readable::read(r)?,
 946                         timestamp: Readable::read(r)?,
 947                         flags: Readable::read(r)?,
 948                         cltv_expiry_delta: Readable::read(r)?,
 949                         htlc_minimum_msat: Readable::read(r)?,
 950                         fee_base_msat: Readable::read(r)?,
 951                         fee_proportional_millionths: Readable::read(r)?,
 952                         excess_data: {
 953                                 let mut excess_data = vec![];
 954                                 r.read_to_end(&mut excess_data)?;
 955                                 excess_data
 956                         },
 957                 })
 958         }
 959 }
 960
 961 impl_writeable_len_match!(ChannelUpdate, {
 962                 { ChannelUpdate { contents: UnsignedChannelUpdate {ref excess_data, ..}, .. },
 963                         64 + excess_data.len() + 64 }
 964         }, {
 965         signature,
 966         contents
 967 });
 968
 969 impl Writeable for ErrorMessage {
 970         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 971                 w.size_hint(32 + 2 + self.data.len());
 972                 self.channel_id.write(w)?;
 973                 (self.data.len() as u16).write(w)?;
 974                 w.write_all(self.data.as_bytes())?;
 975                 Ok(())
 976         }
 977 }
 978
 979 impl<R: Read> Readable<R> for ErrorMessage {
 980         fn read(r: &mut R) -> Result<Self, DecodeError> {
 981                 Ok(Self {
 982                         channel_id: Readable::read(r)?,
 983                         data: {
 984                                 let mut sz: usize = <u16 as Readable<R>>::read(r)? as usize;
 985                                 let mut data = vec![];
 986                                 let data_len = r.read_to_end(&mut data)?;
 987                                 sz = cmp::min(data_len, sz);
 988                                 match String::from_utf8(data[..sz as usize].to_vec()) {
 989                                         Ok(s) => s,
 990                                         Err(_) => return Err(DecodeError::BadText),
 991                                 }
 992                         }
 993                 })
 994         }
 995 }
 996
 997 impl Writeable for UnsignedNodeAnnouncement {
 998         fn write<W: Writer>(&self, w: &mut W) -> Result<(), ::std::io::Error> {
 999                 w.size_hint(64 + 76 + self.features.flags.len() + self.addresses.len()*38 + self.excess_address_data.len() + self.excess_data.len());
1000                 self.features.write(w)?;
1001                 self.timestamp.write(w)?;
1002                 self.node_id.write(w)?;
1003                 w.write_all(&self.rgb)?;
1004                 self.alias.write(w)?;
1005
1006                 let mut addr_slice = Vec::with_capacity(self.addresses.len() * 18);
1007                 let mut addrs_to_encode = self.addresses.clone();
1008                 addrs_to_encode.sort_unstable_by(|a, b| { a.get_id().cmp(&b.get_id()) });
1009                 addrs_to_encode.dedup_by(|a, b| { a.get_id() == b.get_id() });
1010                 for addr in addrs_to_encode.iter() {
1011                         match addr {
1012                                 &NetAddress::IPv4{addr, port} => {
1013                                         addr_slice.push(1);
1014                                         addr_slice.extend_from_slice(&addr);
1015                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
1016                                 },
1017                                 &NetAddress::IPv6{addr, port} => {
1018                                         addr_slice.push(2);
1019                                         addr_slice.extend_from_slice(&addr);
1020                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
1021                                 },
1022                                 &NetAddress::OnionV2{addr, port} => {
1023                                         addr_slice.push(3);
1024                                         addr_slice.extend_from_slice(&addr);
1025                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
1026                                 },
1027                                 &NetAddress::OnionV3{ed25519_pubkey, checksum, version, port} => {
1028                                         addr_slice.push(4);
1029                                         addr_slice.extend_from_slice(&ed25519_pubkey);
1030                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(checksum));
1031                                         addr_slice.push(version);
1032                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
1033                                 },
1034                         }
1035                 }
1036                 ((addr_slice.len() + self.excess_address_data.len()) as u16).write(w)?;
1037                 w.write_all(&addr_slice[..])?;
1038                 w.write_all(&self.excess_address_data[..])?;
1039                 w.write_all(&self.excess_data[..])?;
1040                 Ok(())
1041         }
1042 }
1043
1044 impl<R: Read> Readable<R> for UnsignedNodeAnnouncement {
1045         fn read(r: &mut R) -> Result<Self, DecodeError> {
1046                 let features: GlobalFeatures = Readable::read(r)?;
1047                 if features.requires_unknown_bits() {
1048                         return Err(DecodeError::UnknownRequiredFeature);
1049                 }
1050                 let timestamp: u32 = Readable::read(r)?;
1051                 let node_id: PublicKey = Readable::read(r)?;
1052                 let mut rgb = [0; 3];
1053                 r.read_exact(&mut rgb)?;
1054                 let alias: [u8; 32] = Readable::read(r)?;
1055
1056                 let addrlen: u16 = Readable::read(r)?;
1057                 let mut addr_readpos = 0;
1058                 let mut addresses = Vec::with_capacity(4);
1059                 let mut f: u8 = 0;
1060                 let mut excess = 0;
1061                 loop {
1062                         if addrlen <= addr_readpos { break; }
1063                         f = Readable::read(r)?;
1064                         match f {
1065                                 1 => {
1066                                         if addresses.len() > 0 {
1067                                                 return Err(DecodeError::ExtraAddressesPerType);
1068                                         }
1069                                         if addrlen < addr_readpos + 1 + 6 {
1070                                                 return Err(DecodeError::BadLengthDescriptor);
1071                                         }
1072                                         addresses.push(NetAddress::IPv4 {
1073                                                 addr: {
1074                                                         let mut addr = [0; 4];
1075                                                         r.read_exact(&mut addr)?;
1076                                                         addr
1077                                                 },
1078                                                 port: Readable::read(r)?,
1079                                         });
1080                                         addr_readpos += 1 + 6
1081                                 },
1082                                 2 => {
1083                                         if addresses.len() > 1 || (addresses.len() == 1 && addresses[0].get_id() != 1) {
1084                                                 return Err(DecodeError::ExtraAddressesPerType);
1085                                         }
1086                                         if addrlen < addr_readpos + 1 + 18 {
1087                                                 return Err(DecodeError::BadLengthDescriptor);
1088                                         }
1089                                         addresses.push(NetAddress::IPv6 {
1090                                                 addr: {
1091                                                         let mut addr = [0; 16];
1092                                                         r.read_exact(&mut addr)?;
1093                                                         addr
1094                                                 },
1095                                                 port: Readable::read(r)?,
1096                                         });
1097                                         addr_readpos += 1 + 18
1098                                 },
1099                                 3 => {
1100                                         if addresses.len() > 2 || (addresses.len() > 0 && addresses.last().unwrap().get_id() > 2) {
1101                                                 return Err(DecodeError::ExtraAddressesPerType);
1102                                         }
1103                                         if addrlen < addr_readpos + 1 + 12 {
1104                                                 return Err(DecodeError::BadLengthDescriptor);
1105                                         }
1106                                         addresses.push(NetAddress::OnionV2 {
1107                                                 addr: {
1108                                                         let mut addr = [0; 10];
1109                                                         r.read_exact(&mut addr)?;
1110                                                         addr
1111                                                 },
1112                                                 port: Readable::read(r)?,
1113                                         });
1114                                         addr_readpos += 1 + 12
1115                                 },
1116                                 4 => {
1117                                         if addresses.len() > 3 || (addresses.len() > 0 && addresses.last().unwrap().get_id() > 3) {
1118                                                 return Err(DecodeError::ExtraAddressesPerType);
1119                                         }
1120                                         if addrlen < addr_readpos + 1 + 37 {
1121                                                 return Err(DecodeError::BadLengthDescriptor);
1122                                         }
1123                                         addresses.push(NetAddress::OnionV3 {
1124                                                 ed25519_pubkey: Readable::read(r)?,
1125                                                 checksum: Readable::read(r)?,
1126                                                 version: Readable::read(r)?,
1127                                                 port: Readable::read(r)?,
1128                                         });
1129                                         addr_readpos += 1 + 37
1130                                 },
1131                                 _ => { excess = 1; break; }
1132                         }
1133                 }
1134
1135                 let mut excess_data = vec![];
1136                 let excess_address_data = if addr_readpos < addrlen {
1137                         let mut excess_address_data = vec![0; (addrlen - addr_readpos) as usize];
1138                         r.read_exact(&mut excess_address_data[excess..])?;
1139                         if excess == 1 {
1140                                 excess_address_data[0] = f;
1141                         }
1142                         excess_address_data
1143                 } else {
1144                         if excess == 1 {
1145                                 excess_data.push(f);
1146                         }
1147                         Vec::new()
1148                 };
1149
1150                 Ok(UnsignedNodeAnnouncement {
1151                         features: features,
1152                         timestamp: timestamp,
1153                         node_id: node_id,
1154                         rgb: rgb,
1155                         alias: alias,
1156                         addresses: addresses,
1157                         excess_address_data: excess_address_data,
1158                         excess_data: {
1159                                 r.read_to_end(&mut excess_data)?;
1160                                 excess_data
1161                         },
1162                 })
1163         }
1164 }
1165
1166 impl_writeable_len_match!(NodeAnnouncement, {
1167                 { NodeAnnouncement { contents: UnsignedNodeAnnouncement { ref features, ref addresses, ref excess_address_data, ref excess_data, ..}, .. },
1168                         64 + 76 + features.flags.len() + addresses.len()*38 + excess_address_data.len() + excess_data.len() }
1169         }, {
1170         signature,
1171         contents
1172 });
1173
1174 #[cfg(test)]
1175 mod tests {
1176         use hex;
1177         use ln::msgs;
1178         use util::ser::Writeable;
1179         use secp256k1::key::{PublicKey,SecretKey};
1180         use secp256k1::Secp256k1;
1181
1182         #[test]
1183         fn encoding_channel_reestablish_no_secret() {
1184                 let cr = msgs::ChannelReestablish {
1185                         channel_id: [4, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0],
1186                         next_local_commitment_number: 3,
1187                         next_remote_commitment_number: 4,
1188                         data_loss_protect: None,
1189                 };
1190
1191                 let encoded_value = cr.encode();
1192                 assert_eq!(
1193                         encoded_value,
1194                         vec![4, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4]
1195                 );
1196         }
1197
1198         #[test]
1199         fn encoding_channel_reestablish_with_secret() {
1200                 let public_key = {
1201                         let secp_ctx = Secp256k1::new();
1202                         PublicKey::from_secret_key(&secp_ctx, &SecretKey::from_slice(&secp_ctx, &hex::decode("0101010101010101010101010101010101010101010101010101010101010101").unwrap()[..]).unwrap())
1203                 };
1204
1205                 let cr = msgs::ChannelReestablish {
1206                         channel_id: [4, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0],
1207                         next_local_commitment_number: 3,
1208                         next_remote_commitment_number: 4,
1209                         data_loss_protect: Some(msgs::DataLossProtect { your_last_per_commitment_secret: [9;32], my_current_per_commitment_point: public_key}),
1210                 };
1211
1212                 let encoded_value = cr.encode();
1213                 assert_eq!(
1214                         encoded_value,
1215                         vec![4, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 3, 27, 132, 197, 86, 123, 18, 100, 64, 153, 93, 62, 213, 170, 186, 5, 101, 215, 30, 24, 52, 96, 72, 25, 255, 156, 23, 245, 233, 213, 221, 7, 143]
1216                 );
1217         }
1218 }