multi: move Input interface and related code

This commit is a step to split the lnwallet package. It puts the Input
interface and implementations in a separate package along with all their
dependencies from lnwallet.

routing/notifications_test.go

@@ -16,6 +16,7 @@ import (
 	"github.com/btcsuite/btcutil"
 	"github.com/go-errors/errors"
 	"github.com/lightningnetwork/lnd/channeldb"
+	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/routing/chainview"
@@ -87,7 +88,7 @@ func createChannelEdge(ctx *testCtx, bitcoinKey1, bitcoinKey2 []byte,
 	*lnwire.ShortChannelID, error) {
 
 	fundingTx := wire.NewMsgTx(2)
-	_, tx, err := lnwallet.GenFundingPkScript(
+	_, tx, err := input.GenFundingPkScript(
 		bitcoinKey1,
 		bitcoinKey2,
 		int64(chanValue),

routing/pathfind.go

@@ -10,6 +10,7 @@ import (
 
 	"github.com/btcsuite/btcd/btcec"
 	"github.com/coreos/bbolt"
+
 	"github.com/lightningnetwork/lightning-onion"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/lnwire"

routing/router.go

@@ -16,9 +16,11 @@ import (
 	"github.com/coreos/bbolt"
 	"github.com/davecgh/go-spew/spew"
 	"github.com/go-errors/errors"
+
 	"github.com/lightningnetwork/lightning-onion"
 	"github.com/lightningnetwork/lnd/channeldb"
 	"github.com/lightningnetwork/lnd/htlcswitch"
+	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwire"
 	"github.com/lightningnetwork/lnd/multimutex"
@@ -1034,13 +1036,13 @@ func (r *ChannelRouter) processUpdate(msg interface{}) error {
 		// Recreate witness output to be sure that declared in channel
 		// edge bitcoin keys and channel value corresponds to the
 		// reality.
-		witnessScript, err := lnwallet.GenMultiSigScript(
+		witnessScript, err := input.GenMultiSigScript(
 			msg.BitcoinKey1Bytes[:], msg.BitcoinKey2Bytes[:],
 		)
 		if err != nil {
 			return err
 		}
-		fundingPkScript, err := lnwallet.WitnessScriptHash(witnessScript)
+		fundingPkScript, err := input.WitnessScriptHash(witnessScript)
 		if err != nil {
 			return err
 		}

routing/router_test.go

@@ -9,14 +9,14 @@ import (
 	"testing"
 	"time"
 
-	"github.com/btcsuite/btcd/wire"
-	"github.com/lightningnetwork/lnd/channeldb"
-	"github.com/lightningnetwork/lnd/htlcswitch"
-
 	"github.com/btcsuite/btcd/btcec"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/wire"
 	"github.com/davecgh/go-spew/spew"
+
 	"github.com/lightningnetwork/lightning-onion"
+	"github.com/lightningnetwork/lnd/channeldb"
+	"github.com/lightningnetwork/lnd/htlcswitch"
 	"github.com/lightningnetwork/lnd/lnwire"
 )