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channeldb: modify UpdateCommitment to accept a ChannelCommitment

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In this commit, we modify the UpdateCommitment method to accept a full
ChannelCommitment rather than a new transaction, the sig, and a
ChannelDelta. This new structure of this method also takes advantage of
the new bucket structure of the storage schema. Additionally, this
method will now atomically swap in the new passed commitment to point
to the LocalCommitment value within the struct.
This commit is contained in:
Olaoluwa Osuntokun 2017-11-09 20:35:46 -08:00
parent 2dcd82e779
commit 3e3969eb66
No known key found for this signature in database
GPG Key ID: 964EA263DD637C21
1 changed files with 17 additions and 63 deletions
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74
channeldb/channel.go
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@ -610,79 +610,33 @@ func (c *OpenChannel) SyncPending(addr *net.TCPAddr, pendingHeight uint32) error
})
}
// UpdateCommitment updates the on-disk state of our currently broadcastable
// commitment state. This method is to be called once we have revoked our prior
// commitment state, accepting the new state as defined by the passed
// parameters.
func (c *OpenChannel) UpdateCommitment(newCommitment *wire.MsgTx,
newSig []byte, delta *ChannelDelta) error {
// UpdateCommitment updates the commitment state for the specified party
// (remote or local). The commitment stat completely describes the balance
// state at this point in the commitment chain. This method its to be called on
// two occasions: when we revoke our prior commitment state, and when the
// remote party revokes their prior commitment state.
func (c *OpenChannel) UpdateCommitment(newCommitment *ChannelCommitment) error {
c.Lock()
defer c.Unlock()
return c.Db.Update(func(tx *bolt.Tx) error {
chanBucket, err := tx.CreateBucketIfNotExists(openChannelBucket)
err := c.Db.Update(func(tx *bolt.Tx) error {
chanBucket, err := updateChanBucket(tx, c.IdentityPub,
&c.FundingOutpoint, c.ChainHash)
if err != nil {
return err
}
id := c.IdentityPub.SerializeCompressed()
nodeChanBucket, err := chanBucket.CreateBucketIfNotExists(id)
// With the proper bucket fetched, we'll now write toe latest
// commitment state to dis for the target party.
return putChanCommitment(chanBucket, newCommitment, true)
})
if err != nil {
return err
}
// TODO(roasbeef): modify the funcs below to take values
// directly, otherwise need to roll back to prior state. Could
// also make copy above, then modify to pass in.
c.CommitTx = *newCommitment
c.CommitSig = newSig
c.LocalBalance = delta.LocalBalance
c.RemoteBalance = delta.RemoteBalance
c.NumUpdates = delta.UpdateNum
c.OurMessageIndex = delta.OurMessageIndex
c.TheirMessageIndex = delta.TheirMessageIndex
c.Htlcs = delta.Htlcs
c.CommitFee = delta.CommitFee
c.FeePerKw = delta.FeePerKw
// First we'll write out the current latest dynamic channel
// state: the current channel balance, the number of updates,
// and our latest commitment transaction+sig.
// TODO(roasbeef): re-make schema s.t this is a single put
if err := putChanCapacity(chanBucket, c); err != nil {
return err
}
if err := putChanAmountsTransferred(chanBucket, c); err != nil {
return err
}
if err := putChanNumUpdates(chanBucket, c); err != nil {
return err
}
if err := putOurMessageIndex(chanBucket, c); err != nil {
return err
}
if err := putTheirMessageIndex(chanBucket, c); err != nil {
return err
}
if err := putChanCommitFee(chanBucket, c); err != nil {
return err
}
if err := putChanFeePerKw(chanBucket, c); err != nil {
return err
}
if err := putChanCommitTxns(nodeChanBucket, c); err != nil {
return err
}
if err := putCurrentHtlcs(nodeChanBucket, delta.Htlcs,
&c.FundingOutpoint); err != nil {
return err
}
c.LocalCommitment = *newCommitment
return nil
})
}
// HTLC is the on-disk representation of a hash time-locked contract. HTLCs are