From bdfc453245c33101828122f5695ea0d9a1c9ca71 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ond=C5=99ej=20Vejpustek?= <ondrej.vejpustek@satoshilabs.com>
Date: Mon, 9 May 2022 16:08:33 +0200
Subject: [PATCH] refactor(crypto): remove code that is duplicated in
 secp256k1-zkp submodule

---
 crypto/zkp_bip340.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/crypto/zkp_bip340.c b/crypto/zkp_bip340.c
index 8f588f8f7..fd87086a2 100644
--- a/crypto/zkp_bip340.c
+++ b/crypto/zkp_bip340.c
@@ -136,10 +136,6 @@ int zkp_bip340_sign_digest(const uint8_t *private_key_bytes,
   }
 
   if (result == 0) {
-    uint8_t zero[32] = {0};
-    if (!auxiliary_data) {
-      auxiliary_data = zero;
-    }
     if (secp256k1_schnorrsig_sign32(context_writable, signature_bytes, digest,
                                     &keypair, auxiliary_data) != 1) {
       result = -1;