From d9cc3f6ceda46bef3c436770f787960cf6f64fda Mon Sep 17 00:00:00 2001
From: Dev Random <devrandom@users.noreply.github.com>
Date: Sat, 31 Mar 2018 11:50:06 -0700
Subject: [PATCH] Issue with partial signature entries

---
 Comments:BIP-0174.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Comments:BIP-0174.md b/Comments:BIP-0174.md
index 352da36..85e05b2 100644
--- a/Comments:BIP-0174.md
+++ b/Comments:BIP-0174.md
@@ -1 +1,5 @@
-Comments for the Partially Signed Transaction Format
\ No newline at end of file
+# Comments for the Partially Signed Transaction Format
+
+* Partial signature entries use the map key `{0x02}|{public key}`.  However, a single public key may be involved in signing multiple inputs, and the signature will differ in each one.  Since the map keys are to be unique, this is a problem.  I suggest the following map key instead: `{0x02}|{input index}|{pubkey index}`
+
+* HD derivation entries waste space by repeating the public key.  I recommend using the following map key instead: `{0x03}|{input index}|{pubkey index}`, which also matches previous point.