In this commit, we add logic to account for an edge case in the
protocol. If they initiator if unable to pay the fees for a commitment,
then their *entire* output is meant to go to fees. The recent change to
properly interpret balances as unsigned integers (within the protocol)
let to the discovery of this missed edge case.
lnwire.MilliSatoshi is now a signed integer, as a result, we’ll return
a different error if our balances go to negative due to the inability
to pay a the set fee.
In this commit, we fix a bug introduced by the recent change of
lnwire.MilliSatoshi to be an unsigned integer. After this change an
integer underflow was left undetected, as a result we’ll now
momentarily cast to a signed integer in order to ensure that both sides
can pay the proper fee.
In this commit, we modify lnwire.MilliSatoshi to be an unsigned
integer. We do this as all values within the specification are meant to
be unsigned unless otherwise specified. Our usage of signed integers to
this date has caused some compatibility issues with the other
implementations, so this is the first step to reconciling these
compatibility issues.
In this commit, we modify the way we obtain the current best header
timestamp. In doing this, we fix an intermittent flake that would pop
up at times on the integration tests. This could occur as if the wallet
was lagging behind the chain backend for a re-org, then a hash that the
backend knew of, may not be known by the wallet.
To remedy this, we’ll take advantage of a recent change to btcwallet to
actually include the timestamp in its sync state.
In this commit, we update lnd to now access the deterministic
keychain.KeyRing struct in order to obtain our identity public key.
With this change, if the user recovers their wallet with the same seed,
then they’ll have access to the same prior node identity. This change
also makes it easy for us to support node key rotation in the future by
bumping up our requested index.
In this commit, we modify the mechanics of the wallet to only allow
derivation of segwit-like addresses. Additionally, the ConfirmedBalance
method on the WalletController now only has a single argument, as it’s
assumed that the wallet is itself only concerned with segwit outputs.
In this commit, we modify the way we generate the secrets for
revocation roots to be fully deterministic. Rather than use a special
key and derive all sub-roots from that (mixing in some “salts”), we’ll
use the proper keychain.KeyFamily instead. This ensures that given a
static description of the channel, we’re able to re-derive our
revocation root properly.
In this commit, we modify the funding flow process to obtain all keys
necessary from the keychain.KeyRing interface. This ensure that all
keys we generate are fully deterministic.
In this commit, we remove references to raw keys from the main
ChannelConfig struct and instead replace it with usage of
keychain.KeyDescriptor. We do this, as the ChannelConfig as it stands
is a near complete static description of a channel. In the future, it
will be possible to export these static descriptions as backups. We
prefer the KeyDescriptor of a plain PublicKey, as the KeyLocator
portion of the struct allows a stateless signer to re-derive the keys
as needed when signing.
In this commit, we update the SignDescriptor struct to instead use the
keychain.KeyDescriptor struct inplace of a raw public key. We do this
as this allows for a recovery mode, where the caller doesn’t know what
key was used exactly, but remembers the precise KeyDescriptor. A
stateless signer is still able to re-derive the proper key, as it’s
given the full path.
The new version of the internal core of btcwallet now uses KeyScopes
rather than address types to derive particular addresses. As a result,
in this commit, we update our API usage to ensure that proper addresses
are still derived.
In this commit, we remove two methods from the WalletController
interface which were previously used by the funding reservation process
(NewRawKey) and the p2p network (FetchRootKey) in order to derive
various keys for operation. This methods are no longer necessary as the
KeyRing interface implements the functionality in a deterministic
manner.
In this commit, we add a new package to lnd: the keychain package. The
role of this package is to house all the interfaces that lnd will use
to generate the various keys it needs to create contracts and operate
within the network. Additionally, we also use this package to define a
deterministic key derivation scheme, that can be implemented by any
software/hardware that partially understands BIP43-like derivation.
The first version (v0) of the keychain schema is very simple. We re-use
BIP43, with a slight twist. Re-using BIP43 lets us leverage all the
existing libraries out there as far as compatibility. The purpose used
is 1017, and the coin type, the particular coin type of the chain where
the keys are meant to be used. Within our schema, we define multiple
“key families”. Each key family is actually just manifested as a new
“account” within the BIP44/43 family. With this schema, if we have
static description of the keys used within a channel, given the seed,
and the “KeyLocator”, we can re-derive all keys necessary be able to
re-sign for the channel.
This commit changes the failFundingFlow to accept an error, which will
only be sent to the remote the peer if it is among the
ReservationErrors or ErrorCode. This is done to ensure we don't send
errors that contain information we don't want to leak.
