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reusable open channel logic and share macaroon

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This commit is contained in:
Jesse de Wit
2022-12-03 10:47:47 +01:00
parent b3c5b94531
commit e31a4c43f3
8 changed files with 249 additions and 248 deletions
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31
lnd_client.go
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@@ -33,9 +33,14 @@ func NewLndClient() *LndClient {
log.Fatalf("credentials: failed to append certificates")
}
creds := credentials.NewClientTLSFromCert(cp, "")
macCred := NewMacaroonCredential(os.Getenv("LND_MACAROON_HEX"))
// Address of an LND instance
conn, err := grpc.Dial(os.Getenv("LND_ADDRESS"), grpc.WithTransportCredentials(creds))
conn, err := grpc.Dial(
os.Getenv("LND_ADDRESS"),
grpc.WithTransportCredentials(creds),
grpc.WithPerRPCCredentials(macCred),
)
if err != nil {
log.Fatalf("Failed to connect to LND gRPC: %v", err)
}
@@ -56,7 +61,7 @@ func (c *LndClient) Close() {
}
func (c *LndClient) GetInfo() (*GetInfoResult, error) {
info, err := c.client.GetInfo(macaroonContext(), &lnrpc.GetInfoRequest{})
info, err := c.client.GetInfo(context.Background(), &lnrpc.GetInfoRequest{})
if err != nil {
log.Printf("LND: client.GetInfo() error: %v", err)
return nil, err
@@ -68,29 +73,27 @@ func (c *LndClient) GetInfo() (*GetInfoResult, error) {
}, nil
}
func (c *LndClient) IsConnected(destination []byte) (*bool, error) {
func (c *LndClient) IsConnected(destination []byte) (bool, error) {
pubKey := hex.EncodeToString(destination)
r, err := c.client.ListPeers(macaroonContext(), &lnrpc.ListPeersRequest{LatestError: true})
r, err := c.client.ListPeers(context.Background(), &lnrpc.ListPeersRequest{LatestError: true})
if err != nil {
log.Printf("LND: client.ListPeers() error: %v", err)
return nil, fmt.Errorf("LND: client.ListPeers() error: %w", err)
return false, fmt.Errorf("LND: client.ListPeers() error: %w", err)
}
for _, peer := range r.Peers {
if pubKey == peer.PubKey {
log.Printf("destination online: %x", destination)
result := true
return &result, nil
return true, nil
}
}
log.Printf("LND: destination offline: %x", destination)
result := false
return &result, nil
return false, nil
}
func (c *LndClient) OpenChannel(req *OpenChannelRequest) (*wire.OutPoint, error) {
channelPoint, err := c.client.OpenChannelSync(macaroonContext(), &lnrpc.OpenChannelRequest{
channelPoint, err := c.client.OpenChannelSync(context.Background(), &lnrpc.OpenChannelRequest{
NodePubkey: req.Destination,
LocalFundingAmount: int64(req.CapacitySat),
TargetConf: int32(req.TargetConf),
@@ -115,7 +118,7 @@ func (c *LndClient) OpenChannel(req *OpenChannelRequest) (*wire.OutPoint, error)
}
func (c *LndClient) GetChannel(peerID []byte, channelPoint wire.OutPoint) (*GetChannelResult, error) {
r, err := c.client.ListChannels(macaroonContext(), &lnrpc.ListChannelsRequest{Peer: peerID})
r, err := c.client.ListChannels(context.Background(), &lnrpc.ListChannelsRequest{Peer: peerID})
if err != nil {
log.Printf("client.ListChannels(%x) error: %v", peerID, err)
return nil, err
@@ -197,7 +200,7 @@ func (c *LndClient) GetClosedChannels(nodeID string, channelPoints map[string]ui
}
func (c *LndClient) getWaitingCloseChannels(nodeID string) ([]*lnrpc.PendingChannelsResponse_WaitingCloseChannel, error) {
pendingResponse, err := c.client.PendingChannels(macaroonContext(), &lnrpc.PendingChannelsRequest{})
pendingResponse, err := c.client.PendingChannels(context.Background(), &lnrpc.PendingChannelsRequest{})
if err != nil {
return nil, err
}
@@ -209,7 +212,3 @@ func (c *LndClient) getWaitingCloseChannels(nodeID string) ([]*lnrpc.PendingChan
}
return waitingCloseChannels, nil
}
func macaroonContext() context.Context {
return metadata.AppendToOutgoingContext(context.Background(), "macaroon", os.Getenv("LND_MACAROON_HEX"))
}