lnrpc+rpcserver: add and populate custom channel data

This commit is contained in:
Oliver Gugger 2024-05-17 15:19:05 +02:00
parent 8a0222c347
commit 1b3f386979
No known key found for this signature in database
GPG key ID: 8E4256593F177720
5 changed files with 148 additions and 7 deletions

View file

@ -4685,6 +4685,8 @@ type Channel struct {
// useful information. This is only ever stored locally and in no way impacts
// the channel's operation.
Memo string `protobuf:"bytes,36,opt,name=memo,proto3" json:"memo,omitempty"`
// Custom channel data that might be populated in custom channels.
CustomChannelData []byte `protobuf:"bytes,37,opt,name=custom_channel_data,json=customChannelData,proto3" json:"custom_channel_data,omitempty"`
}
func (x *Channel) Reset() {
@ -4975,6 +4977,13 @@ func (x *Channel) GetMemo() string {
return ""
}
func (x *Channel) GetCustomChannelData() []byte {
if x != nil {
return x.CustomChannelData
}
return nil
}
type ListChannelsRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -9487,6 +9496,9 @@ type ChannelBalanceResponse struct {
PendingOpenLocalBalance *Amount `protobuf:"bytes,7,opt,name=pending_open_local_balance,json=pendingOpenLocalBalance,proto3" json:"pending_open_local_balance,omitempty"`
// Sum of channels pending remote balances.
PendingOpenRemoteBalance *Amount `protobuf:"bytes,8,opt,name=pending_open_remote_balance,json=pendingOpenRemoteBalance,proto3" json:"pending_open_remote_balance,omitempty"`
// Custom channel data that might be populated if there are custom channels
// present.
CustomChannelData []byte `protobuf:"bytes,9,opt,name=custom_channel_data,json=customChannelData,proto3" json:"custom_channel_data,omitempty"`
}
func (x *ChannelBalanceResponse) Reset() {
@ -9579,6 +9591,13 @@ func (x *ChannelBalanceResponse) GetPendingOpenRemoteBalance() *Amount {
return nil
}
func (x *ChannelBalanceResponse) GetCustomChannelData() []byte {
if x != nil {
return x.CustomChannelData
}
return nil
}
type QueryRoutesRequest struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
@ -17408,6 +17427,8 @@ type PendingChannelsResponse_PendingChannel struct {
// useful information. This is only ever stored locally and in no way
// impacts the channel's operation.
Memo string `protobuf:"bytes,13,opt,name=memo,proto3" json:"memo,omitempty"`
// Custom channel data that might be populated in custom channels.
CustomChannelData []byte `protobuf:"bytes,34,opt,name=custom_channel_data,json=customChannelData,proto3" json:"custom_channel_data,omitempty"`
}
func (x *PendingChannelsResponse_PendingChannel) Reset() {
@ -17533,6 +17554,13 @@ func (x *PendingChannelsResponse_PendingChannel) GetMemo() string {
return ""
}
func (x *PendingChannelsResponse_PendingChannel) GetCustomChannelData() []byte {
if x != nil {
return x.CustomChannelData
}
return nil
}
type PendingChannelsResponse_PendingOpenChannel struct {
state protoimpl.MessageState
sizeCache protoimpl.SizeCache
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@ -19089,7 +19120,7 @@ var file_lightning_proto_rawDesc = []byte{
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@ -19121,7 +19152,7 @@ var file_lightning_proto_rawDesc = []byte{
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@ -19156,7 +19187,10 @@ var file_lightning_proto_rawDesc = []byte{
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@ -19334,7 +19368,7 @@ var file_lightning_proto_rawDesc = []byte{
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View file

@ -1590,6 +1590,11 @@ message Channel {
the channel's operation.
*/
string memo = 36;
/*
Custom channel data that might be populated in custom channels.
*/
bytes custom_channel_data = 37;
}
message ListChannelsRequest {
@ -2707,6 +2712,11 @@ message PendingChannelsResponse {
impacts the channel's operation.
*/
string memo = 13;
/*
Custom channel data that might be populated in custom channels.
*/
bytes custom_channel_data = 34;
}
message PendingOpenChannel {
@ -2966,6 +2976,12 @@ message ChannelBalanceResponse {
// Sum of channels pending remote balances.
Amount pending_open_remote_balance = 8;
/*
Custom channel data that might be populated if there are custom channels
present.
*/
bytes custom_channel_data = 9;
}
message QueryRoutesRequest {

View file

@ -3111,6 +3111,11 @@
"memo": {
"type": "string",
"description": "An optional note-to-self to go along with the channel containing some\nuseful information. This is only ever stored locally and in no way\nimpacts the channel's operation."
},
"custom_channel_data": {
"type": "string",
"format": "byte",
"description": "Custom channel data that might be populated in custom channels."
}
}
},
@ -3805,6 +3810,11 @@
"memo": {
"type": "string",
"description": "An optional note-to-self to go along with the channel containing some\nuseful information. This is only ever stored locally and in no way impacts\nthe channel's operation."
},
"custom_channel_data": {
"type": "string",
"format": "byte",
"description": "Custom channel data that might be populated in custom channels."
}
}
},
@ -4008,6 +4018,11 @@
"pending_open_remote_balance": {
"$ref": "#/definitions/lnrpcAmount",
"description": "Sum of channels pending remote balances."
},
"custom_channel_data": {
"type": "string",
"format": "byte",
"description": "Custom channel data that might be populated if there are custom channels\npresent."
}
}
},

View file

@ -958,6 +958,11 @@ func (h *HarnessTest) AssertChannelBalanceResp(hn *node.HarnessNode,
expected *lnrpc.ChannelBalanceResponse) {
resp := hn.RPC.ChannelBalance()
// Ignore custom channel data of both expected and actual responses.
expected.CustomChannelData = nil
resp.CustomChannelData = nil
require.True(h, proto.Equal(expected, resp), "balance is incorrect "+
"got: %v, want: %v", resp, expected)
}

View file

@ -3477,6 +3477,7 @@ func (r *rpcServer) ChannelBalance(ctx context.Context,
unsettledRemoteBalance lnwire.MilliSatoshi
pendingOpenLocalBalance lnwire.MilliSatoshi
pendingOpenRemoteBalance lnwire.MilliSatoshi
customDataBuf bytes.Buffer
)
openChannels, err := r.server.chanStateDB.FetchAllOpenChannels()
@ -3484,6 +3485,12 @@ func (r *rpcServer) ChannelBalance(ctx context.Context,
return nil, err
}
// Encode the number of open channels to the custom data buffer.
err = wire.WriteVarInt(&customDataBuf, 0, uint64(len(openChannels)))
if err != nil {
return nil, err
}
for _, channel := range openChannels {
c := channel.LocalCommitment
localBalance += c.LocalBalance
@ -3497,6 +3504,13 @@ func (r *rpcServer) ChannelBalance(ctx context.Context,
unsettledRemoteBalance += htlc.Amt
}
}
// Encode the custom data for this open channel.
openChanData := channel.LocalCommitment.CustomBlob.UnwrapOr(nil)
err = wire.WriteVarBytes(&customDataBuf, 0, openChanData)
if err != nil {
return nil, err
}
}
pendingChannels, err := r.server.chanStateDB.FetchPendingChannels()
@ -3504,10 +3518,23 @@ func (r *rpcServer) ChannelBalance(ctx context.Context,
return nil, err
}
// Encode the number of pending channels to the custom data buffer.
err = wire.WriteVarInt(&customDataBuf, 0, uint64(len(pendingChannels)))
if err != nil {
return nil, err
}
for _, channel := range pendingChannels {
c := channel.LocalCommitment
pendingOpenLocalBalance += c.LocalBalance
pendingOpenRemoteBalance += c.RemoteBalance
// Encode the custom data for this pending channel.
openChanData := channel.LocalCommitment.CustomBlob.UnwrapOr(nil)
err = wire.WriteVarBytes(&customDataBuf, 0, openChanData)
if err != nil {
return nil, err
}
}
rpcsLog.Debugf("[channelbalance] local_balance=%v remote_balance=%v "+
@ -3542,6 +3569,7 @@ func (r *rpcServer) ChannelBalance(ctx context.Context,
Sat: uint64(pendingOpenRemoteBalance.ToSatoshis()),
Msat: uint64(pendingOpenRemoteBalance),
},
CustomChannelData: customDataBuf.Bytes(),
// Deprecated fields.
Balance: int64(localBalance.ToSatoshis()),
@ -3602,6 +3630,12 @@ func (r *rpcServer) fetchPendingOpenChannels() (pendingOpenChannels, error) {
pendingChan.BroadcastHeight()
fundingExpiryBlocks := int32(maxFundingHeight) - currentHeight
customChanBytes, err := encodeCustomChanData(pendingChan)
if err != nil {
return nil, fmt.Errorf("unable to encode open chan "+
"data: %w", err)
}
result[i] = &lnrpc.PendingChannelsResponse_PendingOpenChannel{
Channel: &lnrpc.PendingChannelsResponse_PendingChannel{
RemoteNodePub: hex.EncodeToString(pub),
@ -3615,6 +3649,7 @@ func (r *rpcServer) fetchPendingOpenChannels() (pendingOpenChannels, error) {
CommitmentType: rpcCommitmentType(pendingChan.ChanType),
Private: isPrivate(pendingChan),
Memo: string(pendingChan.Memo),
CustomChannelData: customChanBytes,
},
CommitWeight: commitWeight,
CommitFee: int64(localCommitment.CommitFee),
@ -4345,6 +4380,30 @@ func isPrivate(dbChannel *channeldb.OpenChannel) bool {
return dbChannel.ChannelFlags&lnwire.FFAnnounceChannel != 1
}
// encodeCustomChanData encodes the custom channel data for the open channel.
// It encodes that data as a pair of var bytes blobs.
func encodeCustomChanData(lnChan *channeldb.OpenChannel) ([]byte, error) {
customOpenChanData := lnChan.CustomBlob.UnwrapOr(nil)
customLocalCommitData := lnChan.LocalCommitment.CustomBlob.UnwrapOr(nil)
// We'll encode our custom channel data as two blobs. The first is a
// set of var bytes encoding of the open chan data, the second is an
// encoding of the local commitment data.
var customChanDataBuf bytes.Buffer
err := wire.WriteVarBytes(&customChanDataBuf, 0, customOpenChanData)
if err != nil {
return nil, fmt.Errorf("unable to encode open chan "+
"data: %w", err)
}
err = wire.WriteVarBytes(&customChanDataBuf, 0, customLocalCommitData)
if err != nil {
return nil, fmt.Errorf("unable to encode local commit "+
"data: %w", err)
}
return customChanDataBuf.Bytes(), nil
}
// createRPCOpenChannel creates an *lnrpc.Channel from the *channeldb.Channel.
func createRPCOpenChannel(r *rpcServer, dbChannel *channeldb.OpenChannel,
isActive, peerAliasLookup bool) (*lnrpc.Channel, error) {
@ -4399,6 +4458,14 @@ func createRPCOpenChannel(r *rpcServer, dbChannel *channeldb.OpenChannel,
// is returned and peerScidAlias will be an empty ShortChannelID.
peerScidAlias, _ := r.server.aliasMgr.GetPeerAlias(chanID)
// Finally we'll attempt to encode the custom channel data if any
// exists.
customChanBytes, err := encodeCustomChanData(dbChannel)
if err != nil {
return nil, fmt.Errorf("unable to encode open chan data: %w",
err)
}
channel := &lnrpc.Channel{
Active: isActive,
Private: isPrivate(dbChannel),
@ -4431,6 +4498,7 @@ func createRPCOpenChannel(r *rpcServer, dbChannel *channeldb.OpenChannel,
ZeroConf: dbChannel.IsZeroConf(),
ZeroConfConfirmedScid: dbChannel.ZeroConfRealScid().ToUint64(),
Memo: string(dbChannel.Memo),
CustomChannelData: customChanBytes,
// TODO: remove the following deprecated fields
CsvDelay: uint32(dbChannel.LocalChanCfg.CsvDelay),
LocalChanReserveSat: int64(dbChannel.LocalChanCfg.ChanReserve),