add blacklist

config.go

@@ -8,10 +8,12 @@ import (
 )
 
 var Configuration = struct {
+	Mode          string   `yaml:"mode"`
 	Host          string   `yaml:"host"`
 	MacaroonPath  string   `yaml:"macaroon_path"`
 	TLSPath       string   `yaml:"tls_path"`
-	Accept        []string `yaml:"accept"`
+	Whitelist     []string `yaml:"whitelist"`
+	Blacklist     []string `yaml:"blacklist"`
 	RejectMessage string   `yaml:"reject_message"`
 }{}
 
@@ -28,7 +30,7 @@ func checkConfig() {
 		panic(fmt.Errorf("no host specified in config.yaml"))
 	}
 
-	if len(Configuration.Accept) == 0 {
+	if len(Configuration.Whitelist) == 0 {
 		panic(fmt.Errorf("no accepted pubkeys specified in config.yaml"))
 	}
 
@@ -36,4 +38,8 @@ func checkConfig() {
 		log.Warnf("reject message is too long. Trimming to 500 characters.")
 		Configuration.RejectMessage = Configuration.RejectMessage[:500]
 	}
+	if len(Configuration.Mode) == 0 {
+		Configuration.Mode = "blacklist"
+	}
+	log.Infof("Running in %s mode", Configuration.Mode)
 }

config.yaml.example

@@ -1,7 +1,13 @@
+mode: "blacklist"
+
 host: "127.0.0.1:10009"
-macaroon_path: "/home/bitcoin/.lnd/data/chain/bitcoin/regtest/admin.macaroon"
+macaroon_path: "/home/bitcoin/.lnd/data/chain/bitcoin/mainnet/admin.macaroon"
 tls_path: "/home/bitcoin/.lnd/tls.cert"
-reject_message: "Contact me at user@email.com to be added to the white list."
-accept:
+
+reject_message: "Contact me at user@email.com"
+
+whitelist:
   - "03de70865239e99460041e127647b37101b9eb335b3c22de95c944671f0dabc2d0"
   - "0307299a290529c5ccb3a5e3bd2eb504daf64cc65c6d65b582c01cbd7e5ede14b6"
+blacklist:
+  - "02853f9c1d15d479b433039885373b681683b84bb73e86dff861bee6697c17c1de"

main.go

@@ -70,17 +70,29 @@ func main() {
 		}
 		log.Infof("New channel request from %s", hex.EncodeToString(req.NodePubkey))
 
-		accept := false
-		for _, pubkey := range Configuration.Accept {
+		var accept bool
+
+		if Configuration.Mode == "whitelist" {
+			accept = false
+			for _, pubkey := range Configuration.Whitelist {
 				if hex.EncodeToString(req.NodePubkey) == pubkey {
 					accept = true
 					break
 				}
 			}
+		} else if Configuration.Mode == "blacklist" {
+			accept = true
+			for _, pubkey := range Configuration.Blacklist {
+				if hex.EncodeToString(req.NodePubkey) == pubkey {
+					accept = false
+					break
+				}
+			}
+		}
 
 		res := lnrpc.ChannelAcceptResponse{}
 		if accept {
-			log.Infof("✅ Accepting channel request from %s", trimPubKey(req.NodePubkey))
+			log.Infof("✅ [%s mode] Allow channel from %s", Configuration.Mode, trimPubKey(req.NodePubkey))
 			res = lnrpc.ChannelAcceptResponse{Accept: true,
 				PendingChanId:   req.PendingChanId,
 				CsvDelay:        req.CsvDelay,
@@ -91,7 +103,7 @@ func main() {
 			}
 
 		} else {
-			log.Infof("❌ Rejecting channel request from %s", trimPubKey(req.NodePubkey))
+			log.Infof("❌ [%s mode] Deny channel from %s", Configuration.Mode, trimPubKey(req.NodePubkey))
 			res = lnrpc.ChannelAcceptResponse{Accept: false,
 				Error: Configuration.RejectMessage}
 		}