From 6ab037a9bc4f15f60da4a624017b9318520163dc Mon Sep 17 00:00:00 2001
From: YusukeShimizu <bruwbird@mercari.com>
Date: Mon, 2 Oct 2023 14:44:09 +0900
Subject: [PATCH] reserve amount is divided from the total amount

---
 clightning/clightning.go | 22 ++++++++++++----------
 lnd/client.go            |  6 ++++--
 2 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/clightning/clightning.go b/clightning/clightning.go
index 9c554c53..3358da73 100644
--- a/clightning/clightning.go
+++ b/clightning/clightning.go
@@ -217,21 +217,23 @@ type ListPeerChannelsResponse struct {
 }
 
 type PeerChannel struct {
-	PeerId         string            `json:"peer_id"`
-	PeerConnected  bool              `json:"peer_connected"`
-	State          string            `json:"state"`
-	ShortChannelId string            `json:"short_channel_id,omitempty"`
-	TotalMsat      glightning.Amount `json:"total_msat,omitempty"`
-	ToUsMsat       glightning.Amount `json:"to_us_msat,omitempty"`
-	ReceivableMsat glightning.Amount `json:"receivable_msat,omitempty"`
-	SpendableMsat  glightning.Amount `json:"spendable_msat,omitempty"`
+	PeerId           string            `json:"peer_id"`
+	PeerConnected    bool              `json:"peer_connected"`
+	State            string            `json:"state"`
+	ShortChannelId   string            `json:"short_channel_id,omitempty"`
+	TotalMsat        glightning.Amount `json:"total_msat,omitempty"`
+	ToUsMsat         glightning.Amount `json:"to_us_msat,omitempty"`
+	ReceivableMsat   glightning.Amount `json:"receivable_msat,omitempty"`
+	SpendableMsat    glightning.Amount `json:"spendable_msat,omitempty"`
+	TheirReserveMsat glightning.Amount `json:"their_reserve_msat,omitempty"`
+	OurReserveMsat   glightning.Amount `json:"our_reserve_msat,omitempty"`
 }
 
 func (ch *PeerChannel) GetSpendableMsat() uint64 {
 	if ch.SpendableMsat.MSat() > 0 {
 		return ch.SpendableMsat.MSat()
 	} else {
-		return ch.ToUsMsat.MSat()
+		return ch.ToUsMsat.MSat() - ch.OurReserveMsat.MSat()
 	}
 }
 
@@ -239,7 +241,7 @@ func (ch *PeerChannel) GetReceivableMsat() uint64 {
 	if ch.ReceivableMsat.MSat() > 0 {
 		return ch.ReceivableMsat.MSat()
 	} else {
-		return ch.TotalMsat.MSat() - ch.ToUsMsat.MSat()
+		return ch.TotalMsat.MSat() - ch.ToUsMsat.MSat() - ch.TheirReserveMsat.MSat()
 	}
 }
 
diff --git a/lnd/client.go b/lnd/client.go
index 9e0c5945..7a2bd29d 100644
--- a/lnd/client.go
+++ b/lnd/client.go
@@ -126,7 +126,8 @@ func (l *Client) SpendableMsat(scid string) (uint64, error) {
 			if err != nil {
 				return 0, err
 			}
-			spendable := uint64(ch.LocalBalance * 1000)
+			spendable := (uint64(ch.GetLocalBalance()) -
+				ch.GetLocalConstraints().GetChanReserveSat()*1000)
 			// since the max htlc limit is not always set reliably,
 			// the check is skipped if it is not set.
 			if maxHtlcAmtMsat == 0 {
@@ -162,7 +163,8 @@ func (l *Client) ReceivableMsat(scid string) (uint64, error) {
 			if err != nil {
 				return 0, err
 			}
-			receivable := uint64(ch.RemoteBalance * 1000)
+			receivable := (uint64(ch.GetRemoteBalance()) -
+				ch.GetRemoteConstraints().GetChanReserveSat()*1000)
 			// since the max htlc limit is not always set reliably,
 			// the check is skipped if it is not set.
 			if maxHtlcAmtMsat == 0 {