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channeldb: add new HtlcIndex and LogIndex fields to the HTLC struct

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By adding these two fields, it is now possible to fully reconstruct the
channel’s update log from the set of HTLC’s stored on disk, as we now
properly note both the log index and HTLC index. Prior to this commit
we would simply start the new log index based on the amount of HTLC’s
that were present in the prior state.
This commit is contained in:
Olaoluwa Osuntokun 2017-11-09 19:57:33 -08:00
parent fb8ff256d8
commit 040c6bdf22
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GPG Key ID: 964EA263DD637C21
1 changed files with 15 additions and 4 deletions
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19
channeldb/channel.go
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@ -566,9 +566,11 @@ func (c *OpenChannel) UpdateHTLCs(htlcs []*HTLC) error {
})
}
// HTLC is the on-disk representation of a hash time-locked contract. HTLCs
// are contained within ChannelDeltas which encode the current state of the
// HTLC is the on-disk representation of a hash time-locked contract. HTLCs are
// contained within ChannelDeltas which encode the current state of the
// commitment between state updates.
//
// TODO(roasbeef): save space by using smaller ints at tail end?
type HTLC struct {
// Signature is the signature for the second level covenant transaction
// for this HTLC. The second level transaction is a timeout tx in the
@ -600,8 +602,17 @@ type HTLC struct {
// routing.
OnionBlob []byte
// AddLocalInclusionHeight...
AddLocalInclusionHeight uint64
// HtlcIndex is the HTLC counter index of this active, outstanding
// HTLC. This differs from the LogIndex, as the HtlcIndex is only
// incremented for each offered HTLC, while they LogIndex is
// incremented for each update (includes settle+fail).
HtlcIndex uint64
// LogIndex is the cumulative log index of this this HTLC. This differs
// from the HtlcIndex as this will be incremented for each new log
// update added.
LogIndex uint64
}
// AddRemoteInclusionHeight...
AddRemoteInclusionHeight uint64