From 6517104da6e347a86a41056d9b44b2c881da58eb Mon Sep 17 00:00:00 2001
From: Olaoluwa Osuntokun <laolu32@gmail.com>
Date: Wed, 16 Apr 2025 14:47:18 -0700
Subject: [PATCH] lnutil: add LogPubKey helper function

This captures a common pattern where we want to log a peer's public key
along side each logging statement.
---
 lnutils/log.go | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lnutils/log.go b/lnutils/log.go
index a588bf3ce..87057290b 100644
--- a/lnutils/log.go
+++ b/lnutils/log.go
@@ -1,8 +1,11 @@
 package lnutils
 
 import (
+	"log/slog"
 	"strings"
 
+	"github.com/btcsuite/btcd/btcec/v2"
+	"github.com/btcsuite/btclog/v2"
 	"github.com/davecgh/go-spew/spew"
 )
 
@@ -36,3 +39,14 @@ func NewSeparatorClosure() LogClosure {
 		return strings.Repeat("=", 80)
 	}
 }
+
+// LogPubKey returns a slog attribute for logging a public key in hex format.
+func LogPubKey(key string, pubKey *btcec.PublicKey) slog.Attr {
+	// Handle nil pubkey gracefully, although callers should ideally prevent
+	// this.
+	if pubKey == nil {
+		return btclog.Fmt(key, "<nil>")
+	}
+
+	return btclog.Hex6(key, pubKey.SerializeCompressed())
+}