From 45a7d6174d7ad8fc45fde2010f120e0241746d6a Mon Sep 17 00:00:00 2001
From: Leigh McCulloch <351529+leighmcculloch@users.noreply.github.com>
Date: Fri, 28 Apr 2023 13:09:18 -0700
Subject: [PATCH] Replace ContractAuth addressWithNonce option with explicit
 union

---
 Stellar-transaction.x | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/Stellar-transaction.x b/Stellar-transaction.x
index d4ad0d9..9e8ffb6 100644
--- a/Stellar-transaction.x
+++ b/Stellar-transaction.x
@@ -540,9 +540,23 @@ struct AddressWithNonce
     uint64 nonce;
 };
 
+enum AuthorizerType
+{
+    AUTHORIZER_SOURCE_ACCOUNT = 0,
+    AUTHORIZER_ADDRESS = 1,
+};
+
+union Authorizer switch (AuthorizerType type)
+{
+case AUTHORIZER_SOURCE_ACCOUNT:
+    void;
+case AUTHORIZER_ADDRESS:
+    AddressWithNonce address;
+};
+
 struct ContractAuth
 {
-    AddressWithNonce* addressWithNonce; // not present for invoker
+    Authorizer authorizer;
     AuthorizedInvocation rootInvocation;
     SCVec signatureArgs;
 };