Commit Graph

1107 Commits

Author SHA1 Message Date
Olaoluwa Osuntokun
5a678d5beb
test: add a callback to networkHarness.RestartNode
This commit adds a callback to the RestartNode method on the network
harness in order to allow test authors to execute arbitrary logic
in-between the restart process for the node.
2016-11-21 21:08:52 -06:00
Olaoluwa Osuntokun
31e65e3333
peer: add logic to dispatch justice after revoke state broadcast
This commit adds the necessary logic a peer’s htlcManger goroutine to
dispatch justice (sweeping all the funds in a channel) after it has
been detected that the counter-party has broadcast a prior revoked
commitment state.

The task to generate the justice transaction is handed off to the
utxoNursery. Once the nursery has finished its duty, the peer launches
a new goroutine which will delete the state of the channel once the
justice transaction has been confirmed within a block.
2016-11-21 13:32:25 -06:00
Olaoluwa Osuntokun
a29cd563f6
utxonursery: expand duties to channel contract breach retribution
This commit expands the duties of the utxoNursery (which should maybe
be renamed), to handle carrying out retribution against a counter-party
who breaches the channel contract by broadcasting a prior revoked state
on-chain.

As part of the retribution, once the breach transaction (the revoked
commitment transaction) has been confirmed within a block, the nursery
then sweep ALL funds pending within the channel to the daemon’s wallet.

This new section of the code has been implemented without full
persistence logic similar to time-locked output sweeping workflow of
the nursery. In a later commit, this section will gain full persistence
logic so the workflows can survive restarts of the daemon.
2016-11-21 13:28:56 -06:00
Olaoluwa Osuntokun
cc63db0aee
lnwallet: add detection+handling of contract breaches in channel
This commit adds detection of contract breaches within the commitment
state-machine for a channel. A contract breach is defined as the event
wherein a channel counter-party broadcasts a previously revoked
commitment transaction. Such an event immediately closes a channel as
the funds are now in a state of dispute.

Once a breach is detected, a snapshot of the breached state is
retrieved from the database’s revocation log. This snapshot is then
used to generate the revocation leaf used within this particular state
along with all the other information ncessary to sweep ALL active funds
within the channel. This information is encapsulated within the
BreachRetribution struct which is sent over a new channel dedicated to
sending/receiving BreachRetributions.
2016-11-21 00:54:45 -06:00
Olaoluwa Osuntokun
188811cf05
lnwallet: populate the output index of an HTLC in ChannelDeltas
This commit modifies the logic within the state machine to properly
populate the new field of `OutputIndex` which the HTLC stored within a
channel delta.

With this change, in the future we’ll be able to quickly locate a
particular HTLC output in the scenario that the commitment transaction
has been broadcast on-chain and we need to sweep it. Allocating a few
extra bytes on-disk saves us from the guess-and-check logic+code
required otherwise.
2016-11-20 23:54:24 -06:00
Olaoluwa Osuntokun
2d884618aa
lnwallet: ensure all channel state machine methods are thread-safe
This commit adds some necessary locking to ensure that all updates to
the internal state of the commitment state machine are fully serial and
thread-safe. This change is required to ensure future actions w.r.t
taking action once a revoked commitment transaction has been broadcast
are not carried out while the channel’s state is being updated.
2016-11-20 23:33:27 -06:00
Olaoluwa Osuntokun
e942e70651
lnwallet: extend the SignDescriptor to include a PrivateTweak
This commit extends the SignDescriptor with a single attribute, the
‘PrivateTweak’. The duties of the Signer interface have also been
augmented to properly derive a private key using the specified tweak,
iff it’s non-nil.

As currently defined in order to generate the proper private key based
off of a PrivateTweak, the signer is to add the tweak value to the
private key for the specified public key. This generated value is to be
used for signing within the specified context.

This change paves the way for automatic revoked output sweeping with
signatures generated directly by the Signer interface, maintaining the
structure of the abstraction.

A test has been added at the interface level in order to excerise each
WalletController’s implementation of the key derivation as currently
defined.
2016-11-18 17:12:58 -08:00
Olaoluwa Osuntokun
c81e0a3ebb
lnwallet: convert CommitSpendRevoke+CommitSpendNoDelay to use Signer
This commit converts the rearming two commitment spend functions to use
the lnwallet.Signer interface directly rather than manually manage
private keys during the signing process. This commit is in preparation
for implementation of fully automated revoked uncooperative closure
detection and retribution.
2016-11-18 15:23:50 -08:00
Olaoluwa Osuntokun
d98cac432b
peer: ensure access to activeChannels and htlcManagers is thread safe 2016-11-17 18:43:51 -08:00
Olaoluwa Osuntokun
81e65e00e5
channeldb: include the output index within stored HTLC's 2016-11-17 18:32:55 -08:00
Olaoluwa Osuntokun
22074eb737
lnwallet: integrate obfuscated state hints into funding workflow
This commit finalizes the implementation of #58 by integrating passing
around the obfuscate state hints into the funding workflow of the
wallet, and also the daemon’s funding manager.

In order to amend the tests, the functions to set and receive the state
hints are now publicly exported.
2016-11-16 12:54:39 -08:00
Olaoluwa Osuntokun
3010412bbc
lnwallet: set initiator and channel type during reservation creation 2016-11-16 12:51:27 -08:00
Olaoluwa Osuntokun
74122a0901
lnwallet: encode obfuscated state hints in the commitment tx
This commit modifies the channel state machine slightly to encode the
current state number using 30-bits of the sequence number within the
commitment transaction’s only input.

Such a modification reduces up the processing time required to punish
the counter party for breaching the contract established within the
channel by broadcasting an older revoked state.

This fixes #58 with a minor modification to what was originally
suggested.
2016-11-16 12:49:44 -08:00
Olaoluwa Osuntokun
e44b2b91fc
netharness: remove test for the node restart method
This commit removes the prior test for the node restart method as it
can be very flaky due to process not always relinquishing ports they
were blinded to.

The solution for this problem is to have the lnd processes obtain ports
to listen on based on their process ID.
2016-11-16 12:46:45 -08:00
Olaoluwa Osuntokun
c31c980f82
netharness: properly return all errors during lightningNode.start() 2016-11-16 12:44:43 -08:00
Olaoluwa Osuntokun
8608ffba15
test: cancel the daemon panic goroutine after interaction tests 2016-11-16 12:43:08 -08:00
Olaoluwa Osuntokun
8053f841e4
lnd: ensure the gRPC listener is closed once the daemon exits 2016-11-16 12:42:05 -08:00
Olaoluwa Osuntokun
3e4981d15f
channeldb: don't use iota for the ChannelType enum
This commit modifies the ChannelType enum to no longer use iota as
changes in the definition would cause the values to shift, breaking the
long-term stability required for persistence. Instead, we now select
values manually to indicate the particular channel type.
2016-11-16 11:45:21 -08:00
Olaoluwa Osuntokun
08a852bf90
channeldb: add additional godoc comment for OpenChannel 2016-11-15 18:53:01 -08:00
Olaoluwa Osuntokun
66571e4464
channeldb: add new field to store the state hint obsfucator 2016-11-15 18:51:54 -08:00
Olaoluwa Osuntokun
bc3e16dd13
channeldb: explicitly store if we're the channel initiator or not
This commit modifies the existing OpenChannel struct slightly to store
a bool which indicates if we were the one who initially initiated the
channel or not. This information is relevant as in the current draft of
the specification, much of the fee related negotiation is contingent on
who initiated the channel.
2016-11-15 18:50:31 -08:00
Olaoluwa Osuntokun
9b41d814dc
channeldb: remove TotalNetFees from OpenChannel
This commit removes all prior fee tracking attributes along with the
persistence code from OpenChannel. The rationale is that fees actually
don’t exist at the channel level, and instead should be tracked at
higher level of abstraction as fees come from the inbound/outbound
satoshi spread.
2016-11-15 18:47:14 -08:00
Olaoluwa Osuntokun
729e586eb6
channeldb: store an enum indicating channel type in OpenChannel
This commit modifies the OpenChannel struct along with all related
persistent to additional store a single byte which indicates the exact
type of the channel. This may be useful in the future as higher level
behavior may change depending on the precise type of the channel.
2016-11-15 17:41:27 -08:00
Olaoluwa Osuntokun
1ef218a73d
lnwire: add the state hint obsfucator to the SingleFundingComplete msg 2016-11-14 19:04:03 -08:00
Olaoluwa Osuntokun
fef927e276
lnwallet: correct good comments on state hint helper funcs 2016-11-14 18:37:20 -08:00
Olaoluwa Osuntokun
d43ef24ed3
lnwallet: add utility functions for obfuscated commitment state hints
This commit adds two utility functions along with corresponding tests
for adding obfuscated state number hints to each commitment
transaction.

Such a feature reduces the search time to recover the necessary
material to punish a counterpaty for broadcasting an invalid state from
O(N), to O(1), where N is the number of states in the channel’s
transcript. By encoding the obsfucated state number, either side is
able to quickly obtain the ncessary state to excerise “justice”.
2016-11-14 18:35:10 -08:00
Olaoluwa Osuntokun
39262c66d6
lnrpc: add current block height and a 'synced 'bit to GetInfo response 2016-11-14 15:54:53 -08:00
Olaoluwa Osuntokun
39c279b639
test: add ability to networkHarness to cause an arbitrary node to restart
This commit adds a new feature to the network harness: test writers are
now able to select arbitrary nodes, causing them to restart.

This functionality will be useful in the future in order to test
scenarios like persisting data across restarts, re-syncing after
re-connections, reacting to the counter party broadcasting revoked
states, etc.
2016-11-14 15:49:09 -08:00
Olaoluwa Osuntokun
75ea05aef6
brontide: the encrypted packet length is no longer the associated data
This commit modifies the current implementation to more closely match
what’s currently specified within the spec.

The encrypted+MAC’d packet length is no longer included as the
associated data for the encryption/decryption of transport messages.
This isn’t required as if an active attacker swaps out the encrypted
length in the byte string, the decryption+MAC check will simply fail as
the nonce won’t be in proper sequence.
2016-11-14 15:10:54 -08:00
Olaoluwa Osuntokun
6e01bb72b0
lnwallet+peer: minor typo fixes 2016-11-14 15:06:17 -08:00
Olaoluwa Osuntokun
df74d8981d
lnrpc: display creation date and settle date for Invoices 2016-11-12 18:09:36 -08:00
Olaoluwa Osuntokun
d545afa5fe
rpcserver: fetch balance for ChannelBalance from disk
This commit modifies the ChannelBalance RPC to fetch the balance from
disk since channels are now able to efficiently retrieved from disk due
to recent index that have been added. Previously this RPC would only
return accurate information if we had an active connection to the
counter party for each channel.
2016-11-11 15:48:27 -08:00
Olaoluwa Osuntokun
7fc6159f0a
lnwire: re-add .String() to the lnwire.Message interface 2016-11-10 17:48:09 -08:00
Olaoluwa Osuntokun
a4023144d3
peer: notify routing manager of newly loaded channels 2016-11-10 17:41:31 -08:00
Olaoluwa Osuntokun
4113260f9f
lnwallet: minor comment correction 2016-11-10 17:38:59 -08:00
Olaoluwa Osuntokun
ccd0f57cdf
rpcserver: implement SendPaymentSync and OpenChannelSync
This RPC implements the two new RPC methods added in a prior commit.
This involved a slight refactoring to make use of duplicated code
amongst the sync and async variants of the methods.
2016-11-10 17:37:39 -08:00
Olaoluwa Osuntokun
64396a69c3
lnrpc: add synchronous versions of SendPayment and OpenChannel
This commit adds synchronous version of the RPC’s to send payments over
channels and open new channels. The previous async versions of these
RPC calls have been removed from the REST interface.

Additionally for these two RPC calls any field which accepted byte
slices now also accept a variant of the field which is a hex-encoded
string.

The OpenChannelSync RPC is intended to be used along with either the
ListChannels or PendingChannels RPC to poll for a channels existence or
non-existence as a signal that the channel is finally open.
2016-11-10 17:33:34 -08:00
Olaoluwa Osuntokun
ae84b6197b
brontide: implement cipher stream key rotation
This commit implements key rotation for brontide as-per the current
draft of the LN p2p crypto spec. Key rotation is currently performed
every 1000 messages encrypted/decrypted with a cipherState object. Key
rotation is performed by evaluating the HKDF (extracting exactly 64
bytes) with the current chaining key, and cipher key. The key rotation
is to attempted after each nonce increment making implementation easy
as the current nonce value will already be within the local scope.
2016-11-10 17:29:13 -08:00
Olaoluwa Osuntokun
297133316f
peer: implement the ping/pong workflow
This commit refactors the peer struct slightly in order to implement
the new ping/pong workflow added in a prior commit. Pings are currently
sent every 30 seconds unconditionally.
2016-11-10 17:15:41 -08:00
Olaoluwa Osuntokun
3f39f5413e
lnwire: add ping and pong messages
This commit adds Ping and Pong messages to the suite of lnwire
messages. The usage of these messages within the daemon are similar to
the usage of Bitcoin’s ping/pong messages. Pings are to be sent
periodically with a random nonce to check connection activity and also
to gauge latency. Pong’s are to be sent in reply to ping messages,
echo’ing the same nonce used.
2016-11-10 17:09:27 -08:00
Olaoluwa Osuntokun
f12b9b4bd7 Merge pull request #66 from AndrewSamokhvalov/temporary_fix_multihop
Temporary fix multihop
2016-11-08 14:58:01 -08:00
Olaoluwa Osuntokun
543d7c7563 Merge pull request #69 from AndrewSamokhvalov/restore_test_structure
Partially restore previous test structure to fix defer+goroutine
2016-11-08 14:57:43 -08:00
Olaoluwa Osuntokun
97b9b2ff09
docs: add code contribution guidelines
This commit adds a document which outlines some of the traits desired
in future contributions to the daemon. It’s my hope that this document
will allow new contributors to quickly get up to speed on what is
desired in new contributions, possibly directly speeding up review
times.
2016-11-08 12:31:01 -08:00
Andrey Samokhvalov
6d57fb08b3 tests: temporary fix multi hop test 2016-11-08 12:33:10 +03:00
Andrey Samokhvalov
75dd860ac9 tests: fix defer+goroutine by returning previous test structure (without goroutine) 2016-11-08 11:41:16 +03:00
Olaoluwa Osuntokun
767c550d65
brontide: implement message chunking for the net.Conn implementation
This commit implements message chunking within the implementation of
net.Conn which implements our initial handshake, then uses the crypto
to read/write messages.

With this change it’s now possible to send message larger than 65535
bytes over a p2p crypto connection by properly chunking the messages on
the side of the connection that’s writing.
2016-11-07 19:45:06 -08:00
Olaoluwa Osuntokun
49f9f496fb
brontide: modify the max payload length to be 65535 bytes total
This commit modifies the current implementation of the p2p crypto
protocol to further constrain the max allowed payload size. With this
change we now use 16-bits (2-bytes) for the maximum payload length.
This change puts us closer to strict adherence of the Noise spec, and
simplifies the memory management w.r.t implementing the current version
of our scheme.

Note that this doesn’t restrict the size of messages that are able to
be sent over the wire within the LN p2p protocol. Larger message can
safely be encapsulated within the crypt messages via fragmentation that
will detected take place if a larger message is detected.
2016-11-07 18:50:26 -08:00
Olaoluwa Osuntokun
8a4ba58d5b
channeldb: ensure the nodeInfoBucket is deleted within .Wipe() 2016-11-07 18:19:05 -08:00
Olaoluwa Osuntokun
1855b95558
lnwire: modify NetAddress to implement the net.Addr interface
This commit modifies lnwire.NetAddress by adding a .Network() method.
With this added method the struct now implements the net.Addr interface
meaning that it can now be transparently passed into any context where
a net.Addr is requested.

This change paves the way to integration of btcd’s new connmgr into the
daemon to handle establishing persistent connections to all channel
counter parties.
2016-11-07 18:18:20 -08:00
Andrey Samokhvalov
8dcf274a2d fix typos 2016-10-30 17:54:59 +03:00