From a520a3e655320b7a295020ac5014198c184a3c6d Mon Sep 17 00:00:00 2001
From: Duke <duke@hush.is>
Date: Thu, 29 May 2025 15:40:07 -0400
Subject: [PATCH] Support using non-hex utf8 strings with z_sendmany memo

---
 src/wallet/rpcwallet.cpp | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index fe0947a47..5f26a4034 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -5209,8 +5209,16 @@ UniValue z_sendmany(const UniValue& params, bool fHelp, const CPubKey& mypk)
             memo = memoValue.get_str();
             if (!isZaddr) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER, "Memo cannot be used with a taddr.  It can only be used with a zaddr.");
+            } else if(memo.substr(0,5) == "utf8:") {
+                // Support a prefix "utf8:" which allows giving utf8 text instead of hex
+                auto str = memo.substr(5);
+                if (utf8::is_valid(str)) {
+                    memo = HexStr(str);
+                } else {
+                    throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid utf8 in memo");
+                }
             } else if (!IsHex(memo)) {
-                throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, expected memo data in hexadecimal format.");
+                throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, expected memo data in hexadecimal format or to use 'utf8:' prefix.");
             }
             if (memo.length() > HUSH_MEMO_SIZE*2) {
                 throw JSONRPCError(RPC_INVALID_PARAMETER,  strprintf("Invalid parameter, size of memo is larger than maximum allowed %d", HUSH_MEMO_SIZE ));