From 89f9e3a5637f2dfa97c79196c3bc6899f3e3fc6c Mon Sep 17 00:00:00 2001
From: Kleissner <peter@kleissner.investments>
Date: Fri, 22 Oct 2021 06:17:28 +0200
Subject: [PATCH] New function PublicKeyFromPeerID

---
 Peer ID.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Peer ID.go b/Peer ID.go
index e2e7fa2..e674ee1 100644
--- a/Peer ID.go	
+++ b/Peer ID.go	
@@ -280,3 +280,15 @@ func DeleteAccount() {
 	config.PrivateKey = ""
 	saveConfig()
 }
+
+// PublicKeyFromPeerID decodes the peer ID (hex encoded) into a public key. Returns nil if invalid.
+func PublicKeyFromPeerID(peerID string) (publicKey *btcec.PublicKey) {
+	hash, err := hex.DecodeString(peerID)
+	if err != nil || len(hash) != 33 {
+		return nil
+	}
+
+	publicKey, _ = btcec.ParsePubKey(hash, btcec.S256())
+
+	return publicKey
+}