Add short channel id columns

SCID represents the same information as channel id but uses different
representation made of three components (block height, transaction
index, output index).

README.md

@@ -59,6 +59,7 @@ columns = [
 	"LAST UPDATE", # last update of the channel
 	"PRIVATE",     # true if channel is private
 	"ID",          # the id of the channel
+	# "SCID",      # short channel id (BxTxO formatted)
 ]
 
 [views.transactions]
@@ -79,10 +80,12 @@ columns = [
 	"STATUS",         # one of: active, settled, failed, linkfail
 	"IN_CHANNEL",     # channel id of the incomming channel
 	"IN_ALIAS",       # incoming channel node alias
+	# "IN_SCID",      # incoming short channel id (BxTxO)
 	# "IN_HTLC",      # htlc id on incoming channel
 	# "IN_TIMELOCK",  # incoming timelock height
 	"OUT_CHANNEL",    # channel id of the outgoing channel
 	"OUT_ALIAS",      # outgoing channel node alias
+	# "OUT_SCID",     # outgoing short channel id (BxTxO)
 	# "OUT_HTLC",     # htlc id on outgoing channel
 	# "OUT_TIMELOCK", # outgoing timelock height
 	"AMOUNT",         # routed amount

config/default.go

@@ -43,6 +43,7 @@ columns = [
 	"LAST UPDATE", # last update of the channel
 	"PRIVATE",     # true if channel is private
 	"ID",          # the id of the channel
+	# "SCID",      # short channel id (BxTxO formatted)
 ]
 
 [views.transactions]
@@ -63,10 +64,12 @@ columns = [
 	"STATUS",         # one of: active, settled, failed, linkfail
 	"IN_CHANNEL",     # channel id of the incomming channel
 	"IN_ALIAS",       # incoming channel node alias
+	# "IN_SCID",      # incoming short channel id (BxTxO)
 	# "IN_HTLC",      # htlc id on incoming channel
 	# "IN_TIMELOCK",  # incoming timelock height
 	"OUT_CHANNEL",    # channel id of the outgoing channel
 	"OUT_ALIAS",      # outgoing channel node alias
+	# "OUT_SCID",     # outgoing short channel id (BxTxO)
 	# "OUT_HTLC",     # htlc id on outgoing channel
 	# "OUT_TIMELOCK", # outgoing timelock height
 	"AMOUNT",         # routed amount

ui/views/channel.go

@@ -152,8 +152,8 @@ func (c *Channel) display() {
 	fmt.Fprintln(v, green(" [ Channel ]"))
 	fmt.Fprintf(v, "%s %s\n",
 		cyan("         Status:"), status(channel))
-	fmt.Fprintf(v, "%s %d\n",
-		cyan("             ID:"), channel.ID)
+	fmt.Fprintf(v, "%s %d (%s)\n",
+		cyan("             ID:"), channel.ID, ToScid(channel.ID))
 	fmt.Fprintf(v, "%s %d\n",
 		cyan("       Capacity:"), channel.Capacity)
 	fmt.Fprintf(v, "%s %d\n",

ui/views/channels.go

@@ -478,6 +478,17 @@ func NewChannels(cfg *config.View, chans *models.Channels) *Channels {
 					return color.White(opts...)(fmt.Sprintf("%d", c.ID))
 				},
 			}
+		case "SCID":
+			channels.columns[i] = channelsColumn{
+				width: 14,
+				name:  fmt.Sprintf("%-14s", columns[i]),
+				display: func(c *netmodels.Channel, opts ...color.Option) string {
+					if c.ID == 0 {
+						return fmt.Sprintf("%-14s", "")
+					}
+					return color.White(opts...)(fmt.Sprintf("%-14s", ToScid(c.ID)))
+				},
+			}
 		default:
 			channels.columns[i] = channelsColumn{
 				width: 21,

ui/views/routing.go

@@ -309,6 +309,17 @@ func NewRouting(cfg *config.View, routingEvents *models.RoutingLog, channels *mo
 					return color.White(opts...)(fmt.Sprintf("%19d", c.IncomingChannelId))
 				},
 			}
+		case "IN_SCID":
+			routing.columns[i] = routingColumn{
+				width: 14,
+				name:  fmt.Sprintf("%14s", columns[i]),
+				display: func(c *netmodels.RoutingEvent, opts ...color.Option) string {
+					if c.IncomingChannelId == 0 {
+						return fmt.Sprintf("%14s", "")
+					}
+					return color.White(opts...)(fmt.Sprintf("%14s", ToScid(c.IncomingChannelId)))
+				},
+			}
 		case "IN_TIMELOCK":
 			routing.columns[i] = routingColumn{
 				width: 10,
@@ -348,6 +359,17 @@ func NewRouting(cfg *config.View, routingEvents *models.RoutingLog, channels *mo
 					return color.White(opts...)(fmt.Sprintf("%19d", c.OutgoingChannelId))
 				},
 			}
+		case "OUT_SCID":
+			routing.columns[i] = routingColumn{
+				width: 14,
+				name:  fmt.Sprintf("%14s", columns[i]),
+				display: func(c *netmodels.RoutingEvent, opts ...color.Option) string {
+					if c.OutgoingChannelId == 0 {
+						return fmt.Sprintf("%14s", "")
+					}
+					return color.White(opts...)(fmt.Sprintf("%14s", ToScid(c.OutgoingChannelId)))
+				},
+			}
 		case "OUT_TIMELOCK":
 			routing.columns[i] = routingColumn{
 				width: 10,

ui/views/views.go

@@ -1,6 +1,8 @@
 package views
 
 import (
+	"fmt"
+
 	"github.com/jroimartin/gocui"
 	"github.com/pkg/errors"
 
@@ -113,3 +115,11 @@ func New(cfg config.Views, m *models.Models) *Views {
 		Main:         main,
 	}
 }
+
+func ToScid(id uint64) string {
+	blocknum := id >> 40
+	txnum := (id >> 16) & 0x00FFFFFF
+	outnum := id & 0xFFFF
+
+	return fmt.Sprintf("%dx%dx%d", blocknum, txnum, outnum)
+}