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

   1 use secp256k1::key::PublicKey;
   2 use secp256k1::{Secp256k1, Signature};
   3 use bitcoin::util::uint::Uint256;
   4 use bitcoin::util::hash::Sha256dHash;
   5 use bitcoin::network::serialize::deserialize;
   6 use bitcoin::blockdata::script::Script;
   7
   8 use std::error::Error;
   9 use std::fmt;
  10 use std::result::Result;
  11
  12 use util::{byte_utils, internal_traits, events};
  13
  14 pub trait MsgEncodable {
  15         fn encode(&self) -> Vec<u8>;
  16 }
  17 #[derive(Debug)]
  18 pub enum DecodeError {
  19         /// Unknown realm byte in an OnionHopData packet
  20         UnknownRealmByte,
  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         /// Buffer not of right length (either too short or too long)
  26         WrongLength,
  27 }
  28 pub trait MsgDecodable: Sized {
  29         fn decode(v: &[u8]) -> Result<Self, DecodeError>;
  30 }
  31
  32 /// Tracks localfeatures which are only in init messages
  33 #[derive(Clone, PartialEq)]
  34 pub struct LocalFeatures {
  35         flags: Vec<u8>,
  36 }
  37
  38 impl LocalFeatures {
  39         pub fn new() -> LocalFeatures {
  40                 LocalFeatures {
  41                         flags: Vec::new(),
  42                 }
  43         }
  44
  45         pub fn supports_data_loss_protect(&self) -> bool {
  46                 self.flags.len() > 0 && (self.flags[0] & 3) != 0
  47         }
  48         pub fn requires_data_loss_protect(&self) -> bool {
  49                 self.flags.len() > 0 && (self.flags[0] & 1) != 0
  50         }
  51
  52         pub fn supports_initial_routing_sync(&self) -> bool {
  53                 self.flags.len() > 0 && (self.flags[0] & (1 << 3)) != 0
  54         }
  55
  56         pub fn supports_upfront_shutdown_script(&self) -> bool {
  57                 self.flags.len() > 0 && (self.flags[0] & (3 << 4)) != 0
  58         }
  59         pub fn requires_upfront_shutdown_script(&self) -> bool {
  60                 self.flags.len() > 0 && (self.flags[0] & (1 << 4)) != 0
  61         }
  62
  63         pub fn requires_unknown_bits(&self) -> bool {
  64                 for (idx, &byte) in self.flags.iter().enumerate() {
  65                         if idx != 0 && (byte & 0x55) != 0 {
  66                                 return true;
  67                         } else if idx == 0 && (byte & 0x14) != 0 {
  68                                 return true;
  69                         }
  70                 }
  71                 return false;
  72         }
  73
  74         pub fn supports_unknown_bits(&self) -> bool {
  75                 for (idx, &byte) in self.flags.iter().enumerate() {
  76                         if idx != 0 && byte != 0 {
  77                                 return true;
  78                         } else if idx == 0 && (byte & 0xc4) != 0 {
  79                                 return true;
  80                         }
  81                 }
  82                 return false;
  83         }
  84 }
  85
  86 /// Tracks globalfeatures which are in init messages and routing announcements
  87 #[derive(Clone, PartialEq)]
  88 pub struct GlobalFeatures {
  89         flags: Vec<u8>,
  90 }
  91
  92 impl GlobalFeatures {
  93         pub fn new() -> GlobalFeatures {
  94                 GlobalFeatures {
  95                         flags: Vec::new(),
  96                 }
  97         }
  98
  99         pub fn requires_unknown_bits(&self) -> bool {
 100                 for &byte in self.flags.iter() {
 101                         if (byte & 0x55) != 0 {
 102                                 return true;
 103                         }
 104                 }
 105                 return false;
 106         }
 107
 108         pub fn supports_unknown_bits(&self) -> bool {
 109                 for &byte in self.flags.iter() {
 110                         if byte != 0 {
 111                                 return true;
 112                         }
 113                 }
 114                 return false;
 115         }
 116 }
 117
 118 pub struct Init {
 119         pub global_features: GlobalFeatures,
 120         pub local_features: LocalFeatures,
 121 }
 122
 123 pub struct OpenChannel {
 124         pub chain_hash: Sha256dHash,
 125         pub temporary_channel_id: Uint256,
 126         pub funding_satoshis: u64,
 127         pub push_msat: u64,
 128         pub dust_limit_satoshis: u64,
 129         pub max_htlc_value_in_flight_msat: u64,
 130         pub channel_reserve_satoshis: u64,
 131         pub htlc_minimum_msat: u64,
 132         pub feerate_per_kw: u32,
 133         pub to_self_delay: u16,
 134         pub max_accepted_htlcs: u16,
 135         pub funding_pubkey: PublicKey,
 136         pub revocation_basepoint: PublicKey,
 137         pub payment_basepoint: PublicKey,
 138         pub delayed_payment_basepoint: PublicKey,
 139         pub htlc_basepoint: PublicKey,
 140         pub first_per_commitment_point: PublicKey,
 141         pub channel_flags: u8,
 142         pub shutdown_scriptpubkey: Option<Script>,
 143 }
 144
 145 pub struct AcceptChannel {
 146         pub temporary_channel_id: Uint256,
 147         pub dust_limit_satoshis: u64,
 148         pub max_htlc_value_in_flight_msat: u64,
 149         pub channel_reserve_satoshis: u64,
 150         pub htlc_minimum_msat: u64,
 151         pub minimum_depth: u32,
 152         pub to_self_delay: u16,
 153         pub max_accepted_htlcs: u16,
 154         pub funding_pubkey: PublicKey,
 155         pub revocation_basepoint: PublicKey,
 156         pub payment_basepoint: PublicKey,
 157         pub delayed_payment_basepoint: PublicKey,
 158         pub htlc_basepoint: PublicKey,
 159         pub first_per_commitment_point: PublicKey,
 160         pub shutdown_scriptpubkey: Option<Script>,
 161 }
 162
 163 pub struct FundingCreated {
 164         pub temporary_channel_id: Uint256,
 165         pub funding_txid: Sha256dHash,
 166         pub funding_output_index: u16,
 167         pub signature: Signature,
 168 }
 169
 170 pub struct FundingSigned {
 171         pub channel_id: Uint256,
 172         pub signature: Signature,
 173 }
 174
 175 pub struct FundingLocked {
 176         pub channel_id: Uint256,
 177         pub next_per_commitment_point: PublicKey,
 178 }
 179
 180 pub struct Shutdown {
 181         pub channel_id: Uint256,
 182         pub scriptpubkey: Script,
 183 }
 184
 185 pub struct ClosingSigned {
 186         pub channel_id: Uint256,
 187         pub fee_satoshis: u64,
 188         pub signature: Signature,
 189 }
 190
 191 #[derive(Clone)]
 192 pub struct UpdateAddHTLC {
 193         pub channel_id: Uint256,
 194         pub htlc_id: u64,
 195         pub amount_msat: u64,
 196         pub payment_hash: [u8; 32],
 197         pub cltv_expiry: u32,
 198         pub onion_routing_packet: OnionPacket,
 199 }
 200
 201 #[derive(Clone)]
 202 pub struct UpdateFulfillHTLC {
 203         pub channel_id: Uint256,
 204         pub htlc_id: u64,
 205         pub payment_preimage: [u8; 32],
 206 }
 207
 208 pub struct UpdateFailHTLC {
 209         pub channel_id: Uint256,
 210         pub htlc_id: u64,
 211         pub reason: OnionErrorPacket,
 212 }
 213
 214 pub struct UpdateFailMalformedHTLC {
 215         pub channel_id: Uint256,
 216         pub htlc_id: u64,
 217         pub sha256_of_onion: [u8; 32],
 218         pub failure_code: u16,
 219 }
 220
 221 #[derive(Clone)]
 222 pub struct CommitmentSigned {
 223         pub channel_id: Uint256,
 224         pub signature: Signature,
 225         pub htlc_signatures: Vec<Signature>,
 226 }
 227
 228 pub struct RevokeAndACK {
 229         pub channel_id: Uint256,
 230         pub per_commitment_secret: [u8; 32],
 231         pub next_per_commitment_point: PublicKey,
 232 }
 233
 234 pub struct UpdateFee {
 235         pub channel_id: Uint256,
 236         pub feerate_per_kw: u32,
 237 }
 238
 239 pub struct ChannelReestablish {
 240         pub channel_id: Uint256,
 241         pub next_local_commitment_number: u64,
 242         pub next_remote_commitment_number: u64,
 243         pub your_last_per_commitment_secret: Option<[u8; 32]>,
 244         pub my_current_per_commitment_point: PublicKey,
 245 }
 246
 247 #[derive(Clone)]
 248 pub struct AnnouncementSignatures {
 249         pub channel_id: Uint256,
 250         pub short_channel_id: u64,
 251         pub node_signature: Signature,
 252         pub bitcoin_signature: Signature,
 253 }
 254
 255 #[derive(Clone)]
 256 pub enum NetAddress {
 257         Dummy,
 258         IPv4 {
 259                 addr: [u8; 4],
 260                 port: u16,
 261         },
 262         IPv6 {
 263                 addr: [u8; 16],
 264                 port: u16,
 265         },
 266         OnionV2 {
 267                 addr: [u8; 10],
 268                 port: u16,
 269         },
 270         OnionV3 {
 271                 ed25519_pubkey: [u8; 32],
 272                 checksum: u16,
 273                 version: u8,
 274                 //TODO: Do we need a port number here???
 275         },
 276 }
 277
 278 pub struct UnsignedNodeAnnouncement {
 279         pub features: GlobalFeatures,
 280         pub timestamp: u32,
 281         pub node_id: PublicKey,
 282         pub rgb: [u8; 3],
 283         pub alias: [u8; 32],
 284         pub addresses: Vec<NetAddress>,
 285 }
 286 pub struct NodeAnnouncement {
 287         pub signature: Signature,
 288         pub contents: UnsignedNodeAnnouncement,
 289 }
 290
 291 #[derive(PartialEq, Clone)]
 292 pub struct UnsignedChannelAnnouncement {
 293         pub features: GlobalFeatures,
 294         pub chain_hash: Sha256dHash,
 295         pub short_channel_id: u64,
 296         pub node_id_1: PublicKey,
 297         pub node_id_2: PublicKey,
 298         pub bitcoin_key_1: PublicKey,
 299         pub bitcoin_key_2: PublicKey,
 300 }
 301 #[derive(PartialEq, Clone)]
 302 pub struct ChannelAnnouncement {
 303         pub node_signature_1: Signature,
 304         pub node_signature_2: Signature,
 305         pub bitcoin_signature_1: Signature,
 306         pub bitcoin_signature_2: Signature,
 307         pub contents: UnsignedChannelAnnouncement,
 308 }
 309
 310 #[derive(PartialEq, Clone)]
 311 pub struct UnsignedChannelUpdate {
 312         pub chain_hash: Sha256dHash,
 313         pub short_channel_id: u64,
 314         pub timestamp: u32,
 315         pub flags: u16,
 316         pub cltv_expiry_delta: u16,
 317         pub htlc_minimum_msat: u64,
 318         pub fee_base_msat: u32,
 319         pub fee_proportional_millionths: u32,
 320 }
 321 #[derive(PartialEq, Clone)]
 322 pub struct ChannelUpdate {
 323         pub signature: Signature,
 324         pub contents: UnsignedChannelUpdate,
 325 }
 326
 327 /// Used to put an error message in a HandleError
 328 pub enum ErrorMessage {
 329         UpdateFailHTLC {
 330                 msg: UpdateFailHTLC
 331         },
 332         DisconnectPeer {},
 333 }
 334
 335 pub struct HandleError { //TODO: rename me
 336         pub err: &'static str,
 337         pub msg: Option<ErrorMessage>, //TODO: Move into an Action enum and require it!
 338 }
 339
 340 pub trait ChannelMessageHandler : events::EventsProvider {
 341         //Channel init:
 342         fn handle_open_channel(&self, their_node_id: &PublicKey, msg: &OpenChannel) -> Result<AcceptChannel, HandleError>;
 343         fn handle_accept_channel(&self, their_node_id: &PublicKey, msg: &AcceptChannel) -> Result<(), HandleError>;
 344         fn handle_funding_created(&self, their_node_id: &PublicKey, msg: &FundingCreated) -> Result<FundingSigned, HandleError>;
 345         fn handle_funding_signed(&self, their_node_id: &PublicKey, msg: &FundingSigned) -> Result<(), HandleError>;
 346         fn handle_funding_locked(&self, their_node_id: &PublicKey, msg: &FundingLocked) -> Result<Option<AnnouncementSignatures>, HandleError>;
 347
 348         // Channl close:
 349         fn handle_shutdown(&self, their_node_id: &PublicKey, msg: &Shutdown) -> Result<(), HandleError>;
 350         fn handle_closing_signed(&self, their_node_id: &PublicKey, msg: &ClosingSigned) -> Result<(), HandleError>;
 351
 352         // HTLC handling:
 353         fn handle_update_add_htlc(&self, their_node_id: &PublicKey, msg: &UpdateAddHTLC) -> Result<(), HandleError>;
 354         fn handle_update_fulfill_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFulfillHTLC) -> Result<Option<(Vec<UpdateAddHTLC>, CommitmentSigned)>, HandleError>;
 355         fn handle_update_fail_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailHTLC) -> Result<Option<(Vec<UpdateAddHTLC>, CommitmentSigned)>, HandleError>;
 356         fn handle_update_fail_malformed_htlc(&self, their_node_id: &PublicKey, msg: &UpdateFailMalformedHTLC) -> Result<Option<(Vec<UpdateAddHTLC>, CommitmentSigned)>, HandleError>;
 357         fn handle_commitment_signed(&self, their_node_id: &PublicKey, msg: &CommitmentSigned) -> Result<RevokeAndACK, HandleError>;
 358         fn handle_revoke_and_ack(&self, their_node_id: &PublicKey, msg: &RevokeAndACK) -> Result<(), HandleError>;
 359
 360         fn handle_update_fee(&self, their_node_id: &PublicKey, msg: &UpdateFee) -> Result<(), HandleError>;
 361
 362         // Channel-to-announce:
 363         fn handle_announcement_signatures(&self, their_node_id: &PublicKey, msg: &AnnouncementSignatures) -> Result<(), HandleError>;
 364 }
 365
 366 pub trait RoutingMessageHandler {
 367         fn handle_node_announcement(&self, msg: &NodeAnnouncement) -> Result<(), HandleError>;
 368         /// Handle a channel_announcement message, returning true if it should be forwarded on, false
 369         /// or returning an Err otherwise.
 370         fn handle_channel_announcement(&self, msg: &ChannelAnnouncement) -> Result<bool, HandleError>;
 371         fn handle_channel_update(&self, msg: &ChannelUpdate) -> Result<(), HandleError>;
 372 }
 373
 374 pub struct OnionRealm0HopData {
 375         pub short_channel_id: u64,
 376         pub amt_to_forward: u64,
 377         pub outgoing_cltv_value: u32,
 378         // 12 bytes of 0-padding
 379 }
 380
 381 pub struct OnionHopData {
 382         pub realm: u8,
 383         pub data: OnionRealm0HopData,
 384         pub hmac: [u8; 32],
 385 }
 386 unsafe impl internal_traits::NoDealloc for OnionHopData{}
 387
 388 #[derive(Clone)]
 389 pub struct OnionPacket {
 390         pub version: u8,
 391         pub public_key: PublicKey,
 392         pub hop_data: [u8; 20*65],
 393         pub hmac: [u8; 32],
 394 }
 395
 396 pub struct DecodedOnionErrorPacket {
 397         pub hmac: [u8; 32],
 398         pub failuremsg: Vec<u8>,
 399         pub pad: Vec<u8>,
 400 }
 401
 402 pub struct OnionErrorPacket {
 403         // This really should be a constant size slice, but the spec lets these things be up to 128KB?
 404         // (TODO) We limit it in decode to much lower...
 405         pub data: Vec<u8>,
 406 }
 407
 408 impl Error for DecodeError {
 409         fn description(&self) -> &str {
 410                 match *self {
 411                         DecodeError::UnknownRealmByte => "Unknown realm byte in Onion packet",
 412                         DecodeError::BadPublicKey => "Invalid public key in packet",
 413                         DecodeError::BadSignature => "Invalid signature in packet",
 414                         DecodeError::WrongLength => "Data was wrong length for packet",
 415                 }
 416         }
 417 }
 418 impl fmt::Display for DecodeError {
 419         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 420                 f.write_str(self.description())
 421         }
 422 }
 423
 424 impl fmt::Debug for HandleError {
 425         fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 426                 f.write_str(self.err)
 427         }
 428 }
 429
 430 macro_rules! secp_pubkey {
 431         ( $ctx: expr, $slice: expr ) => {
 432                 match PublicKey::from_slice($ctx, $slice) {
 433                         Ok(key) => key,
 434                         Err(_) => return Err(DecodeError::BadPublicKey)
 435                 }
 436         };
 437 }
 438
 439 macro_rules! secp_signature {
 440         ( $ctx: expr, $slice: expr ) => {
 441                 match Signature::from_compact($ctx, $slice) {
 442                         Ok(sig) => sig,
 443                         Err(_) => return Err(DecodeError::BadSignature)
 444                 }
 445         };
 446 }
 447
 448 impl MsgDecodable for LocalFeatures {
 449         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 450                 if v.len() < 3 { return Err(DecodeError::WrongLength); }
 451                 let len = byte_utils::slice_to_be16(&v[0..2]) as usize;
 452                 if v.len() != len + 2 { return Err(DecodeError::WrongLength); }
 453                 let mut flags = Vec::with_capacity(len);
 454                 flags.extend_from_slice(&v[2..]);
 455                 Ok(Self {
 456                         flags: flags
 457                 })
 458         }
 459 }
 460 impl MsgEncodable for LocalFeatures {
 461         fn encode(&self) -> Vec<u8> {
 462                 let mut res = Vec::with_capacity(self.flags.len() + 2);
 463                 res.extend_from_slice(&byte_utils::be16_to_array(self.flags.len() as u16));
 464                 res.extend_from_slice(&self.flags[..]);
 465                 res
 466         }
 467 }
 468
 469 impl MsgDecodable for GlobalFeatures {
 470         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 471                 if v.len() < 3 { return Err(DecodeError::WrongLength); }
 472                 let len = byte_utils::slice_to_be16(&v[0..2]) as usize;
 473                 if v.len() != len + 2 { return Err(DecodeError::WrongLength); }
 474                 let mut flags = Vec::with_capacity(len);
 475                 flags.extend_from_slice(&v[2..]);
 476                 Ok(Self {
 477                         flags: flags
 478                 })
 479         }
 480 }
 481 impl MsgEncodable for GlobalFeatures {
 482         fn encode(&self) -> Vec<u8> {
 483                 let mut res = Vec::with_capacity(self.flags.len() + 2);
 484                 res.extend_from_slice(&byte_utils::be16_to_array(self.flags.len() as u16));
 485                 res.extend_from_slice(&self.flags[..]);
 486                 res
 487         }
 488 }
 489
 490 impl MsgDecodable for Init {
 491         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 492                 let global_features = GlobalFeatures::decode(v)?;
 493                 if global_features.flags.len() + 4 <= v.len() {
 494                         return Err(DecodeError::WrongLength);
 495                 }
 496                 let local_features = LocalFeatures::decode(&v[global_features.flags.len() + 2..])?;
 497                 if global_features.flags.len() + local_features.flags.len() + 4 != v.len() {
 498                         return Err(DecodeError::WrongLength);
 499                 }
 500                 Ok(Self {
 501                         global_features: global_features,
 502                         local_features: local_features,
 503                 })
 504         }
 505 }
 506 impl MsgEncodable for Init {
 507         fn encode(&self) -> Vec<u8> {
 508                 let mut res = Vec::with_capacity(self.global_features.flags.len() + self.local_features.flags.len());
 509                 res.extend_from_slice(&self.global_features.encode()[..]);
 510                 res.extend_from_slice(&self.local_features.encode()[..]);
 511                 res
 512         }
 513 }
 514
 515 impl MsgDecodable for OpenChannel {
 516         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 517                 if v.len() < 2*32+6*8+4+2*2+6*33+1 {
 518                         return Err(DecodeError::WrongLength);
 519                 }
 520                 let ctx = Secp256k1::without_caps();
 521
 522                 let mut shutdown_scriptpubkey = None;
 523                 if v.len() >= 321 {
 524                         let len = byte_utils::slice_to_be16(&v[319..321]) as usize;
 525                         if v.len() != 321+len {
 526                                 return Err(DecodeError::WrongLength);
 527                         }
 528                         shutdown_scriptpubkey = Some(Script::from(v[321..321+len].to_vec()));
 529                 } else if v.len() != 2*32+6*8+4+2*2+6*33+1 {
 530                         return Err(DecodeError::WrongLength);
 531                 }
 532
 533                 Ok(OpenChannel {
 534                         chain_hash: deserialize(&v[0..32]).unwrap(),
 535                         temporary_channel_id: deserialize(&v[32..64]).unwrap(),
 536                         funding_satoshis: byte_utils::slice_to_be64(&v[64..72]),
 537                         push_msat: byte_utils::slice_to_be64(&v[72..80]),
 538                         dust_limit_satoshis: byte_utils::slice_to_be64(&v[80..88]),
 539                         max_htlc_value_in_flight_msat: byte_utils::slice_to_be64(&v[88..96]),
 540                         channel_reserve_satoshis: byte_utils::slice_to_be64(&v[96..104]),
 541                         htlc_minimum_msat: byte_utils::slice_to_be64(&v[104..112]),
 542                         feerate_per_kw: byte_utils::slice_to_be32(&v[112..116]),
 543                         to_self_delay: byte_utils::slice_to_be16(&v[116..118]),
 544                         max_accepted_htlcs: byte_utils::slice_to_be16(&v[118..120]),
 545                         funding_pubkey: secp_pubkey!(&ctx, &v[120..153]),
 546                         revocation_basepoint: secp_pubkey!(&ctx, &v[153..186]),
 547                         payment_basepoint: secp_pubkey!(&ctx, &v[186..219]),
 548                         delayed_payment_basepoint: secp_pubkey!(&ctx, &v[219..252]),
 549                         htlc_basepoint: secp_pubkey!(&ctx, &v[252..285]),
 550                         first_per_commitment_point: secp_pubkey!(&ctx, &v[285..318]),
 551                         channel_flags: v[318],
 552                         shutdown_scriptpubkey: shutdown_scriptpubkey
 553                 })
 554         }
 555 }
 556 impl MsgEncodable for OpenChannel {
 557         fn encode(&self) -> Vec<u8> {
 558                 unimplemented!();
 559         }
 560 }
 561
 562 impl MsgDecodable for AcceptChannel {
 563         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 564                 if v.len() < 32+4*8+4+2*2+6*33 {
 565                         return Err(DecodeError::WrongLength);
 566                 }
 567                 let ctx = Secp256k1::without_caps();
 568
 569                 let mut shutdown_scriptpubkey = None;
 570                 if v.len() >= 272 {
 571                         let len = byte_utils::slice_to_be16(&v[270..272]) as usize;
 572                         if v.len() != 272+len {
 573                                 return Err(DecodeError::WrongLength);
 574                         }
 575                         shutdown_scriptpubkey = Some(Script::from(v[272..272+len].to_vec()));
 576                 } else if v.len() != 32+4*8+4+2*2+6*33 {
 577                         return Err(DecodeError::WrongLength);
 578                 }
 579
 580                 Ok(Self {
 581                         temporary_channel_id: deserialize(&v[0..32]).unwrap(),
 582                         dust_limit_satoshis: byte_utils::slice_to_be64(&v[32..40]),
 583                         max_htlc_value_in_flight_msat: byte_utils::slice_to_be64(&v[40..48]),
 584                         channel_reserve_satoshis: byte_utils::slice_to_be64(&v[48..56]),
 585                         htlc_minimum_msat: byte_utils::slice_to_be64(&v[56..64]),
 586                         minimum_depth: byte_utils::slice_to_be32(&v[64..68]),
 587                         to_self_delay: byte_utils::slice_to_be16(&v[68..70]),
 588                         max_accepted_htlcs: byte_utils::slice_to_be16(&v[70..72]),
 589                         funding_pubkey: secp_pubkey!(&ctx, &v[72..105]),
 590                         revocation_basepoint: secp_pubkey!(&ctx, &v[105..138]),
 591                         payment_basepoint: secp_pubkey!(&ctx, &v[138..171]),
 592                         delayed_payment_basepoint: secp_pubkey!(&ctx, &v[171..204]),
 593                         htlc_basepoint: secp_pubkey!(&ctx, &v[204..237]),
 594                         first_per_commitment_point: secp_pubkey!(&ctx, &v[237..270]),
 595                         shutdown_scriptpubkey: shutdown_scriptpubkey
 596                 })
 597         }
 598 }
 599 impl MsgEncodable for AcceptChannel {
 600         fn encode(&self) -> Vec<u8> {
 601                 unimplemented!();
 602         }
 603 }
 604
 605 impl MsgDecodable for FundingCreated {
 606         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 607                 if v.len() != 32+32+2+64 {
 608                         return Err(DecodeError::WrongLength);
 609                 }
 610                 let ctx = Secp256k1::without_caps();
 611                 Ok(Self {
 612                         temporary_channel_id: deserialize(&v[0..32]).unwrap(),
 613                         funding_txid: deserialize(&v[32..64]).unwrap(),
 614                         funding_output_index: byte_utils::slice_to_be16(&v[64..66]),
 615                         signature: secp_signature!(&ctx, &v[66..130]),
 616                 })
 617         }
 618 }
 619 impl MsgEncodable for FundingCreated {
 620         fn encode(&self) -> Vec<u8> {
 621                 unimplemented!();
 622         }
 623 }
 624
 625 impl MsgDecodable for FundingSigned {
 626         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 627                 if v.len() != 32+64 {
 628                         return Err(DecodeError::WrongLength);
 629                 }
 630                 let ctx = Secp256k1::without_caps();
 631                 Ok(Self {
 632                         channel_id: deserialize(&v[0..32]).unwrap(),
 633                         signature: secp_signature!(&ctx, &v[32..96]),
 634                 })
 635         }
 636 }
 637 impl MsgEncodable for FundingSigned {
 638         fn encode(&self) -> Vec<u8> {
 639                 unimplemented!();
 640         }
 641 }
 642
 643 impl MsgDecodable for FundingLocked {
 644         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 645                 if v.len() != 32+33 {
 646                         return Err(DecodeError::WrongLength);
 647                 }
 648                 let ctx = Secp256k1::without_caps();
 649                 Ok(Self {
 650                         channel_id: deserialize(&v[0..32]).unwrap(),
 651                         next_per_commitment_point: secp_pubkey!(&ctx, &v[32..65]),
 652                 })
 653         }
 654 }
 655 impl MsgEncodable for FundingLocked {
 656         fn encode(&self) -> Vec<u8> {
 657                 unimplemented!();
 658         }
 659 }
 660
 661 impl MsgDecodable for Shutdown {
 662         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 663                 unimplemented!();
 664         }
 665 }
 666 impl MsgEncodable for Shutdown {
 667         fn encode(&self) -> Vec<u8> {
 668                 unimplemented!();
 669         }
 670 }
 671
 672 impl MsgDecodable for ClosingSigned {
 673         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 674                 unimplemented!();
 675         }
 676 }
 677 impl MsgEncodable for ClosingSigned {
 678         fn encode(&self) -> Vec<u8> {
 679                 unimplemented!();
 680         }
 681 }
 682
 683 impl MsgDecodable for UpdateAddHTLC {
 684         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 685                 unimplemented!();
 686         }
 687 }
 688 impl MsgEncodable for UpdateAddHTLC {
 689         fn encode(&self) -> Vec<u8> {
 690                 unimplemented!();
 691         }
 692 }
 693
 694 impl MsgDecodable for UpdateFulfillHTLC {
 695         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 696                 unimplemented!();
 697         }
 698 }
 699 impl MsgEncodable for UpdateFulfillHTLC {
 700         fn encode(&self) -> Vec<u8> {
 701                 unimplemented!();
 702         }
 703 }
 704
 705 impl MsgDecodable for UpdateFailHTLC {
 706         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 707                 unimplemented!();
 708         }
 709 }
 710 impl MsgEncodable for UpdateFailHTLC {
 711         fn encode(&self) -> Vec<u8> {
 712                 unimplemented!();
 713         }
 714 }
 715
 716 impl MsgDecodable for UpdateFailMalformedHTLC {
 717         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 718                 unimplemented!();
 719         }
 720 }
 721 impl MsgEncodable for UpdateFailMalformedHTLC {
 722         fn encode(&self) -> Vec<u8> {
 723                 unimplemented!();
 724         }
 725 }
 726
 727 impl MsgDecodable for CommitmentSigned {
 728         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 729                 unimplemented!();
 730         }
 731 }
 732 impl MsgEncodable for CommitmentSigned {
 733         fn encode(&self) -> Vec<u8> {
 734                 unimplemented!();
 735         }
 736 }
 737
 738 impl MsgDecodable for RevokeAndACK {
 739         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 740                 unimplemented!();
 741         }
 742 }
 743 impl MsgEncodable for RevokeAndACK {
 744         fn encode(&self) -> Vec<u8> {
 745                 unimplemented!();
 746         }
 747 }
 748
 749 impl MsgDecodable for UpdateFee {
 750         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 751                 unimplemented!();
 752         }
 753 }
 754 impl MsgEncodable for UpdateFee {
 755         fn encode(&self) -> Vec<u8> {
 756                 unimplemented!();
 757         }
 758 }
 759
 760 impl MsgDecodable for ChannelReestablish {
 761         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 762                 unimplemented!();
 763         }
 764 }
 765 impl MsgEncodable for ChannelReestablish {
 766         fn encode(&self) -> Vec<u8> {
 767                 unimplemented!();
 768         }
 769 }
 770
 771 impl MsgDecodable for AnnouncementSignatures {
 772         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 773                 unimplemented!();
 774         }
 775 }
 776 impl MsgEncodable for AnnouncementSignatures {
 777         fn encode(&self) -> Vec<u8> {
 778                 unimplemented!();
 779         }
 780 }
 781
 782 impl MsgDecodable for UnsignedNodeAnnouncement {
 783         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 784                 unimplemented!();
 785         }
 786 }
 787 impl MsgEncodable for UnsignedNodeAnnouncement {
 788         fn encode(&self) -> Vec<u8> {
 789                 let features = self.features.encode();
 790                 let mut res = Vec::with_capacity(74 + features.len() + self.addresses.len());
 791                 res.extend_from_slice(&features[..]);
 792                 res.extend_from_slice(&byte_utils::be32_to_array(self.timestamp));
 793                 res.extend_from_slice(&self.node_id.serialize());
 794                 res.extend_from_slice(&self.rgb);
 795                 res.extend_from_slice(&self.alias);
 796                 let mut addr_slice = Vec::with_capacity(self.addresses.len() * 18);
 797                 for addr in self.addresses.iter() {
 798                         match addr {
 799                                 &NetAddress::Dummy => {},
 800                                 &NetAddress::IPv4{addr, port} => {
 801                                         addr_slice.extend_from_slice(&addr);
 802                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
 803                                 },
 804                                 &NetAddress::IPv6{addr, port} => {
 805                                         addr_slice.extend_from_slice(&addr);
 806                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
 807                                 },
 808                                 &NetAddress::OnionV2{addr, port} => {
 809                                         addr_slice.extend_from_slice(&addr);
 810                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(port));
 811                                 },
 812                                 &NetAddress::OnionV3{ed25519_pubkey, checksum, version} => {
 813                                         addr_slice.extend_from_slice(&ed25519_pubkey);
 814                                         addr_slice.extend_from_slice(&byte_utils::be16_to_array(checksum));
 815                                         addr_slice.push(version);
 816                                 },
 817                         }
 818                 }
 819                 res.extend_from_slice(&byte_utils::be16_to_array(addr_slice.len() as u16));
 820                 res.extend_from_slice(&addr_slice[..]);
 821                 res
 822         }
 823 }
 824
 825 impl MsgDecodable for NodeAnnouncement {
 826         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 827                 unimplemented!();
 828         }
 829 }
 830 impl MsgEncodable for NodeAnnouncement {
 831         fn encode(&self) -> Vec<u8> {
 832                 unimplemented!();
 833         }
 834 }
 835
 836 impl MsgDecodable for UnsignedChannelAnnouncement {
 837         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 838                 unimplemented!();
 839         }
 840 }
 841 impl MsgEncodable for UnsignedChannelAnnouncement {
 842         fn encode(&self) -> Vec<u8> {
 843                 let features = self.features.encode();
 844                 let mut res = Vec::with_capacity(172 + features.len());
 845                 res.extend_from_slice(&features[..]);
 846                 res.extend_from_slice(&self.chain_hash[..]);
 847                 res.extend_from_slice(&byte_utils::be64_to_array(self.short_channel_id));
 848                 res.extend_from_slice(&self.node_id_1.serialize());
 849                 res.extend_from_slice(&self.node_id_2.serialize());
 850                 res.extend_from_slice(&self.bitcoin_key_1.serialize());
 851                 res.extend_from_slice(&self.bitcoin_key_2.serialize());
 852                 res
 853         }
 854 }
 855
 856 impl MsgDecodable for ChannelAnnouncement {
 857         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 858                 unimplemented!();
 859         }
 860 }
 861 impl MsgEncodable for ChannelAnnouncement {
 862         fn encode(&self) -> Vec<u8> {
 863                 unimplemented!();
 864         }
 865 }
 866
 867 impl MsgDecodable for UnsignedChannelUpdate {
 868         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 869                 unimplemented!();
 870         }
 871 }
 872 impl MsgEncodable for UnsignedChannelUpdate {
 873         fn encode(&self) -> Vec<u8> {
 874                 let mut res = Vec::with_capacity(64);
 875                 res.extend_from_slice(&self.chain_hash[..]);
 876                 res.extend_from_slice(&byte_utils::be64_to_array(self.short_channel_id));
 877                 res.extend_from_slice(&byte_utils::be32_to_array(self.timestamp));
 878                 res.extend_from_slice(&byte_utils::be16_to_array(self.flags));
 879                 res.extend_from_slice(&byte_utils::be16_to_array(self.cltv_expiry_delta));
 880                 res.extend_from_slice(&byte_utils::be64_to_array(self.htlc_minimum_msat));
 881                 res.extend_from_slice(&byte_utils::be32_to_array(self.fee_base_msat));
 882                 res.extend_from_slice(&byte_utils::be32_to_array(self.fee_proportional_millionths));
 883                 res
 884         }
 885 }
 886
 887 impl MsgDecodable for ChannelUpdate {
 888         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 889                 unimplemented!();
 890         }
 891 }
 892 impl MsgEncodable for ChannelUpdate {
 893         fn encode(&self) -> Vec<u8> {
 894                 let mut res = Vec::with_capacity(128);
 895                 //TODO: Should avoid creating a new secp ctx just for a serialize call :(
 896                 res.extend_from_slice(&self.signature.serialize_der(&Secp256k1::new())[..]); //TODO: Need in non-der form! (probably elsewhere too)
 897                 res.extend_from_slice(&self.contents.encode()[..]);
 898                 res
 899         }
 900 }
 901
 902 impl MsgDecodable for OnionRealm0HopData {
 903         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 904                 if v.len() != 32 {
 905                         return Err(DecodeError::WrongLength);
 906                 }
 907                 Ok(OnionRealm0HopData {
 908                         short_channel_id: byte_utils::slice_to_be64(&v[0..8]),
 909                         amt_to_forward: byte_utils::slice_to_be64(&v[8..16]),
 910                         outgoing_cltv_value: byte_utils::slice_to_be32(&v[16..20]),
 911                 })
 912         }
 913 }
 914 impl MsgEncodable for OnionRealm0HopData {
 915         fn encode(&self) -> Vec<u8> {
 916                 let mut res = Vec::with_capacity(32);
 917                 res.extend_from_slice(&byte_utils::be64_to_array(self.short_channel_id));
 918                 res.extend_from_slice(&byte_utils::be64_to_array(self.amt_to_forward));
 919                 res.extend_from_slice(&byte_utils::be32_to_array(self.outgoing_cltv_value));
 920                 res.resize(32, 0);
 921                 res
 922         }
 923 }
 924
 925 impl MsgDecodable for OnionHopData {
 926         fn decode(v: &[u8]) -> Result<Self, DecodeError> {
 927                 if v.len() != 65 {
 928                         return Err(DecodeError::WrongLength);
 929                 }
 930                 let realm = v[0];
 931                 if realm != 0 {
 932                         return Err(DecodeError::UnknownRealmByte);
 933                 }
 934                 let mut hmac = [0; 32];
 935                 hmac[..].copy_from_slice(&v[33..65]);
 936                 Ok(OnionHopData {
 937                         realm: realm,
 938                         data: OnionRealm0HopData::decode(&v[1..33])?,
 939                         hmac: hmac,
 940                 })
 941         }
 942 }
 943 impl MsgEncodable for OnionHopData {
 944         fn encode(&self) -> Vec<u8> {
 945                 let mut res = Vec::with_capacity(65);
 946                 res.push(self.realm);
 947                 res.extend_from_slice(&self.data.encode()[..]);
 948                 res.extend_from_slice(&self.hmac);
 949                 res
 950         }
 951 }
 952
 953 impl MsgDecodable for OnionPacket {
 954         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 955                 unimplemented!();
 956         }
 957 }
 958 impl MsgEncodable for OnionPacket {
 959         fn encode(&self) -> Vec<u8> {
 960                 let mut res = Vec::with_capacity(1 + 33 + 20*65 + 32);
 961                 res.push(self.version);
 962                 res.extend_from_slice(&self.public_key.serialize());
 963                 res.extend_from_slice(&self.hop_data);
 964                 res.extend_from_slice(&self.hmac);
 965                 res
 966         }
 967 }
 968
 969 impl MsgDecodable for DecodedOnionErrorPacket {
 970         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 971                 unimplemented!();
 972         }
 973 }
 974 impl MsgEncodable for DecodedOnionErrorPacket {
 975         fn encode(&self) -> Vec<u8> {
 976                 let mut res = Vec::with_capacity(32 + 4 + self.failuremsg.len() + self.pad.len());
 977                 res.extend_from_slice(&self.hmac);
 978                 res.extend_from_slice(&[((self.failuremsg.len() >> 8) & 0xff) as u8, (self.failuremsg.len() & 0xff) as u8]);
 979                 res.extend_from_slice(&self.failuremsg);
 980                 res.extend_from_slice(&[((self.pad.len() >> 8) & 0xff) as u8, (self.pad.len() & 0xff) as u8]);
 981                 res.extend_from_slice(&self.pad);
 982                 res
 983         }
 984 }
 985
 986 impl MsgDecodable for OnionErrorPacket {
 987         fn decode(_v: &[u8]) -> Result<Self, DecodeError> {
 988                 unimplemented!();
 989         }
 990 }
 991 impl MsgEncodable for OnionErrorPacket {
 992         fn encode(&self) -> Vec<u8> {
 993                 unimplemented!();
 994         }
 995 }
 996