hyperloop: create hyperloop package

This commit adds the initial logger and interfaces
to the hyperloop package.

Author: sputn1ck

hyperloop/interfaces.go

@@ -0,0 +1,51 @@
+package hyperloop
+
+import (
+	"context"
+
+	"github.com/lightninglabs/lndclient"
+	"github.com/lightningnetwork/lnd/input"
+	"github.com/lightningnetwork/lnd/keychain"
+)
+
+// Store is the interface that stores the hyperloop.
+type Store interface {
+	// CreateHyperloop stores the hyperloop in the database.
+	CreateHyperloop(ctx context.Context, hyperloop *HyperLoop) error
+
+	// UpdateHyperloop updates the hyperloop in the database.
+	UpdateHyperloop(ctx context.Context, hyperloop *HyperLoop) error
+
+	// CreateHyperloopParticipant stores the hyperloop participant in the
+	// database.
+	CreateHyperloopParticipant(ctx context.Context,
+		participant *HyperLoopParticipant) error
+
+	// UpdateHyperloopParticipant updates the hyperloop participant in the
+	// database.
+	UpdateHyperloopParticipant(ctx context.Context,
+		participant *HyperLoopParticipant) error
+
+	// GetHyperloop retrieves the hyperloop from the database.
+	GetHyperloop(ctx context.Context, id ID) (*HyperLoop, error)
+
+	// ListHyperloops lists all existing hyperloops the client has ever
+	// made.
+	ListHyperloops(ctx context.Context) ([]*HyperLoop, error)
+}
+
+type Wallet interface {
+	DeriveNextKey(ctx context.Context, family int32) (
+		*keychain.KeyDescriptor, error)
+}
+type Musig2Signer interface {
+	MuSig2Sign(ctx context.Context, sessionID [32]byte,
+		message [32]byte, cleanup bool) ([]byte, error)
+
+	MuSig2CreateSession(ctx context.Context, version input.MuSig2Version,
+		signerLoc *keychain.KeyLocator, signers [][]byte,
+		opts ...lndclient.MuSig2SessionOpts) (*input.MuSig2SessionInfo, error)
+
+	MuSig2RegisterNonces(ctx context.Context, sessionID [32]byte,
+		nonces [][66]byte) (bool, error)
+}

hyperloop/log.go

@@ -0,0 +1,26 @@
+package hyperloop
+
+import (
+	"github.com/btcsuite/btclog"
+	"github.com/lightningnetwork/lnd/build"
+)
+
+// Subsystem defines the sub system name of this package.
+const Subsystem = "HYPRL"
+
+// log is a logger that is initialized with no output filters.  This
+// means the package will not perform any logging by default until the caller
+// requests it.
+var log btclog.Logger
+
+// The default amount of logging is none.
+func init() {
+	UseLogger(build.NewSubLogger(Subsystem, nil))
+}
+
+// UseLogger uses a specified Logger to output package logging info.
+// This should be used in preference to SetLogWriter if the caller is also
+// using btclog.
+func UseLogger(logger btclog.Logger) {
+	log = logger
+}

loopd/log.go

@@ -6,6 +6,7 @@ import (
 	"github.com/lightninglabs/lndclient"
 	"github.com/lightninglabs/loop"
 	"github.com/lightninglabs/loop/fsm"
+	"github.com/lightninglabs/loop/hyperloop"
 	"github.com/lightninglabs/loop/instantout"
 	"github.com/lightninglabs/loop/instantout/reservation"
 	"github.com/lightninglabs/loop/liquidity"
@@ -48,6 +49,10 @@ func SetupLoggers(root *build.RotatingLogWriter, intercept signal.Interceptor) {
 	lnd.AddSubLogger(
 		root, instantout.Subsystem, intercept, instantout.UseLogger,
 	)
+
+	lnd.AddSubLogger(
+		root, hyperloop.Subsystem, intercept, hyperloop.UseLogger,
+	)
 }
 
 // genSubLogger creates a logger for a subsystem. We provide an instance of