From c5ff719cfd1c5647036b0d7715a789242db99fa0 Mon Sep 17 00:00:00 2001
From: Leigh <351529+leighmcculloch@users.noreply.github.com>
Date: Fri, 24 Jul 2026 08:59:19 +0000
Subject: [PATCH 1/2] add SCSpecTypeUDTV2 with opaque id field

---
 Stellar-contract-spec.x | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Stellar-contract-spec.x b/Stellar-contract-spec.x
index 33c4cec..3632c3d 100644
--- a/Stellar-contract-spec.x
+++ b/Stellar-contract-spec.x
@@ -45,7 +45,8 @@ enum SCSpecType
     SC_SPEC_TYPE_BYTES_N = 1006,
 
     // User defined types.
-    SC_SPEC_TYPE_UDT = 2000
+    SC_SPEC_TYPE_UDT = 2000,
+    SC_SPEC_TYPE_UDT_V2 = 2001
 };
 
 struct SCSpecTypeOption
@@ -85,6 +86,12 @@ struct SCSpecTypeUDT
     string name<60>;
 };
 
+struct SCSpecTypeUDTV2
+{
+    opaque id[8];
+    string name<60>;
+};
+
 union SCSpecTypeDef switch (SCSpecType type)
 {
 case SC_SPEC_TYPE_VAL:
@@ -121,6 +128,8 @@ case SC_SPEC_TYPE_BYTES_N:
     SCSpecTypeBytesN bytesN;
 case SC_SPEC_TYPE_UDT:
     SCSpecTypeUDT udt;
+case SC_SPEC_TYPE_UDT_V2:
+    SCSpecTypeUDTV2 udtV2;
 };
 
 struct SCSpecUDTStructFieldV0

From 450bcdaca4a4753da579c9243f62a64f9e60facc Mon Sep 17 00:00:00 2001
From: Leigh <351529+leighmcculloch@users.noreply.github.com>
Date: Thu, 30 Jul 2026 04:55:32 +0000
Subject: [PATCH 2/2] drop name from SCSpecTypeUDTV2, id only

---
 Stellar-contract-spec.x | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Stellar-contract-spec.x b/Stellar-contract-spec.x
index 3632c3d..7a75eaf 100644
--- a/Stellar-contract-spec.x
+++ b/Stellar-contract-spec.x
@@ -89,7 +89,6 @@ struct SCSpecTypeUDT
 struct SCSpecTypeUDTV2
 {
     opaque id[8];
-    string name<60>;
 };
 
 union SCSpecTypeDef switch (SCSpecType type)