From 19621a79936495445936fd16581d62d378cee78f Mon Sep 17 00:00:00 2001
From: Larry Ruane <larry@z.cash>
Date: Mon, 15 Oct 2018 17:25:03 -0600
Subject: [PATCH] sapling z_sendmany default memo 0xf6 + zeros

---
 src/wallet/asyncrpcoperation_sendmany.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/wallet/asyncrpcoperation_sendmany.cpp b/src/wallet/asyncrpcoperation_sendmany.cpp
index 64b1a5f26..b8413b0c4 100644
--- a/src/wallet/asyncrpcoperation_sendmany.cpp
+++ b/src/wallet/asyncrpcoperation_sendmany.cpp
@@ -1333,7 +1333,8 @@ void AsyncRPCOperation_sendmany::add_taddr_change_output_to_tx(CAmount amount) {
 }
 
 std::array<unsigned char, ZC_MEMO_SIZE> AsyncRPCOperation_sendmany::get_memo_from_hex_string(std::string s) {
-    std::array<unsigned char, ZC_MEMO_SIZE> memo = {{0x00}};
+    // initialize to default memo (no_memo), see section 5.5 of the protocol spec
+    std::array<unsigned char, ZC_MEMO_SIZE> memo = {{0xF6}};
     
     std::vector<unsigned char> rawMemo = ParseHex(s.c_str());