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channeldb: expose methods to serialize HTLC's on-disk 

These new methods will be used by the contract court package to
properly serialize the state of HTLC’s that have yet to be fully
resolved on-chain.
This commit is contained in:
Olaoluwa Osuntokun 2018-01-16 19:37:41 -08:00
parent d64ffcb6c8
commit 5d7119fe9c
No known key found for this signature in database
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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@ -746,7 +746,12 @@ type HTLC struct {
LogIndex uint64 LogIndex uint64
} }
func serializeHtlcs(b io.Writer, htlcs []HTLC) error { // SerializeHtlcs writes out the passed set of HTLC's into the passed writer
// using the current default on-disk serialization format.
//
// NOTE: This API is NOT stable, the on-disk format will likely change in the
// future.
func SerializeHtlcs(b io.Writer, htlcs ...HTLC) error {
numHtlcs := uint16(len(htlcs)) numHtlcs := uint16(len(htlcs))
if err := writeElement(b, numHtlcs); err != nil { if err := writeElement(b, numHtlcs); err != nil {
return err return err
@ -765,7 +770,13 @@ func serializeHtlcs(b io.Writer, htlcs []HTLC) error {
return nil return nil
} }
func deserializeHtlcs(r io.Reader) ([]HTLC, error) { // DeserializeHtlcs attempts to read out a slice of HTLC's from the passed
// io.Reader. The bytes within the passed reader MUST have been previously
// written to using the SerializeHtlcs function.
//
// NOTE: This API is NOT stable, the on-disk format will likely change in the
// future.
func DeserializeHtlcs(r io.Reader) ([]HTLC, error) {
var numHtlcs uint16 var numHtlcs uint16
if err := readElement(r, &numHtlcs); err != nil { if err := readElement(r, &numHtlcs); err != nil {
return nil, err return nil, err
@ -1520,7 +1531,7 @@ func serializeChanCommit(w io.Writer, c *ChannelCommitment) error {
return err return err
} }
return serializeHtlcs(w, c.Htlcs) return SerializeHtlcs(w, c.Htlcs...)
} }
func putChanCommitment(chanBucket *bolt.Bucket, c *ChannelCommitment, func putChanCommitment(chanBucket *bolt.Bucket, c *ChannelCommitment,
@ -1624,7 +1635,7 @@ func deserializeChanCommit(r io.Reader) (ChannelCommitment, error) {
return c, err return c, err
} }
c.Htlcs, err = deserializeHtlcs(r) c.Htlcs, err = DeserializeHtlcs(r)
if err != nil { if err != nil {
return c, err return c, err
} }